Uso tópico de sevoflurano en heridas complejas de miembro inferior / Topical use of sevoflurane in complex lower limb wounds

El dolor crónico asociado a heridas de larga evolución en miembros inferiores constituye una situación de conflicto con características angustiantes que compromete seriamente la calidad de vida e interfiere en el proceso de reparación tisular, estableciendo un cuadro propio en el cual la herida se transforma en un componente más de esta compleja condición y no el motivo en sí de la consulta. Dadas las limitaciones y efectos negativos de las terapias usuales para el alivio del dolor crónico en heridas, se establece una apertura a nuevas propuestas adyuvantes. Motivo de ello es el propósito del presente trabajo, a través del uso de sevoflurano tópico para evaluar el incremento de la analgesia en una población con úlceras en miembro inferior de diverso origen etiológico.

Auriculoterapia para reducir el dolor crónico de la columna vertebral de los trabajadores de la salud: ensayo clínico / Auriculotherapy for reducing chronic spinal pain in health workers: a clinical trial / Auriculoterapia para redução da dor crônica na coluna vertebral em trabalhadores da saúde: ensaio clínico

Objetivo: evaluar la efectividad de la auriculoterapia para reducir el dolor musculoesquelético crónico de la columna vertebral de los trabajadores de la salud. Método: ensayo clínico aleatorizado, triple ciego, realizado con trabajadores de la salud diagnosticados con dolor crónico en la columna vertebral. Se aplicaron ocho sesiones de auriculoterapia con semillas, dos por semana. Los resultados fueron medidos con la Escala Numérica del Dolor, el Inventario Breve del Dolor, el Cuestionario de Discapacidad de Roland-Morris y los instrumentos SF-36, en la 1.ª, 4.ª, 8.ª sesión y follow-up a los 15 días. Análisis descriptivo e inferencial. Resultados: participaron 34 trabajadores del grupo intervención y 33 del grupo control, ambos mostraron una reducción en la intensidad del dolor (p>0,05). En el follow-up se registró una mayor reducción en el grupo intervención (3,32 ± 0,42) que en el grupo control (5,00 ± 0,43) (p=0,007). En cuanto a la calidad de vida, mejoró la vitalidad (p=0,012) y la limitación por aspectos emocionales (p=0,025). La relación entre auriculoterapia, discapacidad física e interferencia del dolor no difirió entre los grupos (p>0,05). El uso de medicamentos en el follow-up se mantuvo en el grupo control (77,8%) con respecto al grupo intervención (22,2%) (p=0,013). Conclusión: la auriculoterapia tuvo el mismo efecto en ambos grupos sobre la intensidad del dolor y duró más en el follow-up. Hubo una mejora en la calidad de vida y una reducción en el consumo de medicamentos. REBEC: RBR-3jvmdn.

Objective: to evaluate the effectiveness of auriculotherapy in reducing chronic musculoskeletal pain in the spine of health workers. Method: a randomized, triple-blind clinical trial conducted with health workers diagnosed with chronic spinal pain. Eight sessions of auriculotherapy with seeds were applied, two per week. The outcomes were measured with the Numerical Pain Scale, Brief Pain Inventory, Rolland-Morris Disability Questionnaire and SF-36 instruments, in the 1st, 4th and 8th session, and in the 15-day follow-up period. Descriptive and inferential analyses were performed. Results: 34 workers took part in the Intervention Group and 33 in the Control Group, and both presented reduced pain intensity (p>0.05). In the follow-up period, there was a greater reduction in the Intervention Group (3.32 ± 0.42), when compared to the Control Group (5.00 ± 0.43) (p=0.007). In quality of life, there was improved vitality (p=0.012) and limitation due to emotional aspects (p=0.025). The relationship between auriculotherapy, physical disability and pain interference did not differ between the groups (p>0.05). Medication use in the follow-up period remained unchanged in the Control Group (77.8%) when compared to the Intervention Group (22.2%) (p=0.013). Conclusion: auriculotherapy exerted the same effect between the groups on pain intensity, lasting longer in the follow-up period. There was an improvement in quality of life and a reduction in medication use. REBEC: RBR-3jvmdn.

Objetivo: avaliar a eficácia da auriculoterapia na redução da dor musculoesquelética crônica na coluna vertebral de trabalhadores da área da saúde. Método: ensaio clínico randomizado, triplo cego, realizado com trabalhadores da saúde com diagnóstico de dor crônica na coluna vertebral. Aplicaram-se oito sessões de auriculoterapia com sementes, duas por semana. Desfechos mensurados com os instrumentos Escala Numérica da Dor, Inventário Breve de Dor, Questionário de Incapacidade de Rolland-Morris e SF-36, na 1ª, 4ª, 8ª sessão, e follow-up de 15 dias. Análise descritiva e inferencial. Resultados: participaram 34 trabalhadores no grupo intervenção e 33 no controle, ambos apresentaram redução da intensidade da dor (p>0,05). No follow-up, maior redução no grupo intervenção (3,32 ± 0,42), comparado ao controle (5,00 ± 0,43) (p=0,007). Na qualidade de vida, melhorou a vitalidade (p=0,012) e limitação por aspectos emocionais (p=0,025). Relação entre auriculoterapia, incapacidade física e interferência da dor não diferiu entre os grupos (p>0,05). O uso de medicamentos, no follow-up, manteve-se no grupo controle (77,8%) se comparado à intervenção (22,2%) (p=0,013). Conclusão: a auriculoterapia apresentou igual efeito entre os grupos na intensidade da dor, com maior durabilidade deste no follow-up. Houve melhora da qualidade de vida e redução do consumo de medicamentos. REBEC: RBR-3jvmdn.

Actualización sobre la comorbilidad migraña-depresión / Update on migraine-depression comorbidity

Introducción: La migraña y el trastorno depresivo son patologías altamente prevalentes e incapacitantes, las cuales presentan relaciones bidireccionales de comorbilidad. En la literatura se han descrito factores de riesgo y mecanismos fisiopatológicos comunes para ambas enfermedades, así como asociaciones entre estas y su presentación clínica. Métodos: El presente texto es una revisión narrativa de la literatura. La búsqueda del material bibliográfico se hizo mediante distintas bases de datos especializadas en el área de la salud. Resultados: Algunos factores de riesgo están asociados con ambas patologías, y ambas comparten factores patogénicos, incluidos cambios funcionales, estructurales, genéticos, epigenéticos y hormonales, entre otros. Varios de los tratamientos preventivos que han demostrado eficacia en el tratamiento de la migraña son medicamentos o medidas con efecto antidepresivo. Discusión: Si se consideran las asociaciones y los factores comunes descritos en la literatura, se hace evidente que en el enfoque de pacientes diagnosticados con alguna de estas patologías es necesario tener en cuenta una posible comorbilidad entre migraña y depresión. Conclusión: Es importante promover el tamizaje de estas dos condiciones en pacientes diagnosticados con alguna de ellas, pues esto puede tener implicaciones terapéuticas e impacto en la calidad de vida.

Introduction: Migraine and depressive disorder are highly prevalent and disabling pathologies, which present bidirectional relationships of comorbidity. Common risk factors and pathophysiological mechanisms for both diseases have been described in the literature, as well as associations between them and their clinical presentation. Methods: This text is a narrative literature review. The bibliographical material was found through different databases specialized in health sciences. Results: Some risk factors are associated with both pathologies, and both share pathogenic factors, including functional, structural, genetic, epigenetic, hormonal changes, among others. Several of the preventive treatments that have shown efficacy in the treatment of migraine are medications or measures with an antidepressant effect. Discussion: Considering the associations and common factors described in the literature, it becomes evident that in the approach to patients diagnosed with any of these pathologies, it may be beneficial to consider a possible migraine-depression comorbidity. Conclusion: It is important to promote the screening of these two patients diagnosed with some, since it can have therapeutic implications and impact on quality of life.

Distender o tempo e alinhavar o cuidado: o bordado inventado e a tecnologia da palavra / Stretching time and basting care: the invented embroidery and the word technology / Estirar el tiempo y hilvanar el cuidado: elbordado inventado y la tecnología de palabra

O projeto de pesquisa-intervenção As narrativas ficcionais e o cuidado à dor crônica atuou no Setor de Dor e Cuidados Paliativos de um hospital público, oferecendo-se como coadjuvante do cuidado em saúde. O Ateliê Jardim de Histórias foi um de seus dispositivos e propôs o bordado inventado como linhas de sustentação para um fazer compartilhado. No contexto latinoamericano, o bordar remete à transmissão transgeracional e a práticas políticas e processos de luta e luto no laço social. Este artigo propõe recuperar a história do bordado para além da perspectiva colonial e, a partir disso, a-bordar essa experiência da pesquisa-intervenção no hospital e suas possibilidades. Entende-se que o bordado inventado ressalta a dimensão de improviso e de criatividade dessa prática enquanto um suporte afetivo para a tessitura de narrativas, a partir da disposição de estar com o outro em torno de um fazer sem prescrições. (AU)

The research-intervention project Fictional narratives and chronic pain careacted in the Sector of Pain and Palliative Care of a public hospital, offering an adjunct to health care. The Garden of Stories Atelierwas one of its devices, which proposed the invented embroidery as threads of support for a shared work. In Latin America, embroidery refers to transgenerational transmission, and to political practices and processes of struggle and mourning in the social bond. This article aims to retrieve the history of embroidery beyond the colonial perspective and, from there, to approach this experience of research-intervention in the hospital and its possibilities. The invented embroidery is thought to emphasize the dimension of improvisation and creativity of this practice, as an affective support for the weaving of narratives, from the willingness to be together around an activity without prescriptions. (AU)

El proyecto de investigación-intervención Narrativas ficcionales y el cuidado al dolor crónicofuncionó en el Sector de Dolor y Cuidados Paliativos de un hospital público, ofreciéndose como complemento al cuidado en salud. El Taller Jardín de Historiasfue uno de sus dispositivos y propuso el bordado inventado como líneas de apoyo para una acción compartida. En latinoamerica, el bordado remite a la transmisión transgeneracional y a prácticas políticas y procesos de lucha y luto en el lazo social. Este artículo se propone recuperar la historia del bordado más allá de la perspectiva colonial y, desde allí, abordar esta experiencia de investigación-intervención en el hospital y sus posibilidades. Se entiende que el bordado inventado enfatiza la dimensión deimprovisación y creatividad de esta práctica como soporte afectivo para el tejido de narrativas, desde la voluntad de estar con el otro en torno a un hacer sin recetas. (AU)

Acupuncture in the Treatment of a Series of Patients with Chronic Pain Associated with Hip Osteoarthritis / Acupuntura no tratamento de uma série de pacientes com dor crônica associado à osteoartrite de quadril

Abstract Objective Hip osteoarthritis (HO) causes pain and deranges functioning. Surgical treatment is the preferred approach in severe cases, but clinical comorbidities, age and the long waiting list may compromise quality of life. This study aimed to describe the results of acupuncture for the control pain and improvement of functioning in subjects with HO. Method Twelve severe HO patients were treated with ten weekly sessions of a standardized acupuncture point protocol. Pain intensity was assessed with the Visual Analog Pain Scale (VAS) and quality of life with WOMAC Index. Results Pain intensity (VAS) reduced from 75.8 ± 18.8 mm to 20.0 ± 22.6 mm after 10 acupuncture sessions and 48.3 ± 26.6mm in the follow-up (ANOVA F = 7.99; p < 0.001). WOMAC Index values reduced from 74.7 ± 12.7 to 45.7 ± 22.1 and 54.6 ± 22.9 at the same timepoints. Conclusion Acupuncture is an effective conservative rehabilitation strategy to reduce pain and improve quality of life in subjects with severe HO.

Resumo Objetivo A osteoartrite (OA) de quadril causa dor e perda da funcionalidade. O tratamento cirúrgico é a procedimento de escolha nos casos graves, mas as comorbidades clínicas, a idade e a longa lista de espera podem comprometer a qualidade de vida. Este estudo teve como objetivo descrever os resultados da acupuntura no controle da dor e melhora da funcionalidade em indivíduos com OA de quadril. Método Doze pacientes com OA de quadril grave foram tratados com dez sessões semanais de um protocolo padronizado de pontos de acupuntura. A intensidade da dor foi avaliada pela Escala Visual Analógica de Dor (EVA) e a qualidade de vida pelo Índice WOMAC. Resultados A intensidade da dor (EVA) reduziu de 75,8 ± 18,8mm para 20,0 ± 22,6mm após 10 sessões de acupuntura e 48,3 ± 26,6mm no período de seguimento (ANOVA F = 7,99; p < 0,001). Os valores do Índice WOMAC reduziram de 74,7 ± 12,7 para 45,7 ± 22,1 e 54,6 ± 22,9 nos mesmos momentos. Conclusão A acupuntura é uma estratégia de reabilitação conservadora eficaz para reduzir a dor e melhorar a qualidade de vida em indivíduos com OA de quadril grave.

¿Qué nos ofrece la comunidad para el tratamiento de la fibromialgia? reporte de una experiencia en la región metropolitana de Santiago / What the community has to offer for the fibromyalgia treatment? a report of an experience in the metropolitan region of Santiago

La fibromialgia es un síndrome polisintomático caracterizado por dolor crónico generalizado no articular e idiopático, cuya terapia, tanto farmacológica como no farmacológica, debe ser individualizada a cada paciente e involucrar equipos multidisciplinarios de trabajo. Objetivo del Estudio: Realizar una base de datos para agrupar los recursos comunitarios disponibles para llevar a cabo las terapias no farmacológicas con evidencia en el tratamiento del dolor crónico no oncológico en las comunas de San Joaquín, Macul, Puente Alto, La Florida, La Pintana y San Miguel, Región Metropolitana, Chile. Materiales y Métodos: Se llevó a cabo una búsqueda en internet mediante palabras clave de recursos comunitarios dentro de las comunas antes mencionadas que cumplieran criterios de evidencia en el tratamiento de fibromialgia, además de contactar a servicios municipales y fundaciones orientadas al manejo del dolor no oncológico en la Región Metropolitana, para la confección de una base de datos y un mapa interactivo de fácil acceso y uso con los recursos encontrados. Resultados: Nuestra búsqueda arrojó un total de 78 recursos comunitarios, tanto públicos como privados, que ofrecen alternativas de tratamiento no farmacológico para el manejo del dolor crónico no oncológico y fibromialgia en las cinco comunas descritas. Conclusiones: La fibromialgia es un síndrome polisintomático de difícil manejo frecuente en nuestro país, que incluye como parte de su tratamiento integral diversas medidas no farmacológicas con evidencia reciente, que gracias a la confección de las herramientas creadas para este estudio se espera facilitar el acceso a los recursos disponibles en una zona determinada del Gran Santiago, tanto a los pacientes que padecen estas dolencias como a los profesionales de la salud que indican este tipo de terapias.

Fibromyalgia is a polysymptomatic syndrome characterizedby chronic generalized non-articular and idiopathic pain, whose pharmacological and non-pharmacological therapy must be individualized for each patient and involve multidisciplinary work teams. Objective of the study: To create a database to group the community resources available to carry out non- pharmacological therapies with evidence in the treatment of chronic non-cancer pain in the communes of San Joaquín, Macul, Puente Alto, La Florida, La Pintana and San Miguel, from Metropolitan Region, Chile. Materials and Methods: An internet search was carried out using keywords of community resources within the aforementioned communes that met evidence criteria in the treatment of fibromyalgia, in addition to contacting municipal services and foundations oriented to non- oncological pain management in the Metropolitan Region, for the preparation of a database and an interactive map of easy access and use with the resources found. Results: Our search yielded a total of 78 community resources, both public and private, that offer non- pharmacological treatment alternatives for the management of chronic non-cancer pain and fibromyalgia in the five districts described. Conclusions: Fibromyalgia is a polysymptomatic syndrome of difficult management, common in our country, which includes as part of its comprehensive treatment various non-pharmacological measures with recent evidence, which, thanks to the preparation of the tools created for this study, is expected to facilitate access to resources available in a given area of Santiago de Chile, both to patients suffering from these ailments and to health professionals who indicate this type of therapy.

Sesgos cognitivos en el dolor crónico no oncológico / Cognitive biases in chronic non-cancer pain

Los sesgos cognitivos son un constructo que acuñaron Kahneman & Tveysky (1972) en su Enfoque de Sesgos dentro de la Psicología Cognitiva. Estos son atajos intelectuales que realizan siempre las personas, desde un razonamiento probabilístico intuitivo. El presente trabajo es una primera aproximación que intenta aplicar y describir algunos sesgos cognitivos en el complejo mundo de las representaciones mentales en la experiencia dolorosa, como la ilusión de control; del presente; la confirmación; representatividad; disponibilidad, entre otros. Los sesgos en dolor nos permiten comprender el procesamiento de información frente al dolor y utilizar estrategias comunicacionales más efectivas para su abordaje.

Cognitive biases are a construct coined by Kahneman & Tveysky (1972) in their Approach to Biases in Cognitive Psychology. These are intellectual shortcuts that people always carry out, from an intuitive probabilistic reasoning. An attempt is made to apply and describe some cognitive biases in the complex world of mental representations in the painful experience, like the illusion of control; of the present; the confirmation; representativeness; availability among others. Biases in pain allow us to understand the processing of information in the face of pain and use more effective communication strategies to address it.

Effect of acupuncture on the molar bite force in women with chronic neck pain / Efecto de la acupuntura sobre la fuerza de mordida en mujeres con cervicalgia crónico

Objetive: To investigate the maximum molar bite force in women with chronic neck pain after treatment with acupuncture. Materials and Methods: Twenty-three women with chronic neck pain participated. Dynamometer was used to measure the right and left maximum molar bite force. Dong Bang acupuncture needles - 0.25 mm x 30 mm was inserted into the integumentary tissue. Treatment was 10 sessions, each 30 minutes long and twice a week. Results: The right (p = 0.01) and left (p = 0.004) molar bite force was assessed after treatment with acupuncture, and showed increased occlusal strength. Conclusions: This study suggests a functional improvement in the stomatognathic system in women with chronic cervical pain after treatment with acupuncture. However, it is important to note that further research is needed to fully elucidate the long-term effects and potential clinical implications of these findings in the field of pain management and rehabilitation.

Objetivo: Investigar la fuerza masticatoria máxima en mujeres con dolor crónico de cuello después del tratamiento con acupuntura. Materiales y Métodos: Participaron veintitrés mujeres con dolor crónico de cuello. Se utilizó un dinamómetro para medir la fuerza máxima de mordida del molar derecho e izquierdo. Agujas de acupuntura Dong Bang se insertaron 0,25 mm x 30 mm en el tejido tegumentario. El tratamiento fue de 10 sesiones, cada una de 30 minutos de duración, dos veces por semana. Resultados: Se observó la fuerza de mordida del molar derecho (p=0.01) e izquierdo (p=0.004) después del tratamiento con acupuntura, que mostró un aumento de la fuerza oclusal. Conclusión: Este estudio sugiere una mejora funcional en el sistema estomatognático en mujeres con dolor cervical crónico después del tratamiento con acupuntura. Sin embargo, es importante señalar que se necesita más investigación para dilucidar por completo los efectos a largo plazo y las posibles implicaciones clínicas de estos hallazgos en el campo del tratamiento y la rehabilitación del dolor.

Mindfulness para dor em mulheres com câncer de mama: protocolo de revisão de escopo / Mindfulness for pain in women with breast cancer: a scope review protocol

OBJETIVO: Protocolo de revisão de escopo que será conduzida de acordo com a metodologia do Joanna Briggs Institute (JBI) para mapear e caracterizar evidências disponíveis sobre o uso de intervenções baseadas em mindfulness para manejo da dor em pessoas com diagnóstico de câncer de mama, nas diferentes etapas de tratamento. MÉTODO: Serão incluídos estudos realizados em mulheres adultas com 18 anos ou acima, que tenham recebido diagnóstico de câncer de mama e que passaram por intervenções baseadas em atenção plena direcionadas para manejo da dor. Será considerado o contexto clínico das participantes. Incluiremos artigos de estudos quantitativos e qualitativos, além da chamada literatura cinzenta, sem limites de idioma e tempo. Será utilizada uma estratégia de pesquisa em 3 etapas. As bases de dados utilizadas serão PubMed, CINAHL, Web of Science, BVS, PsycInfo e Google Scholar. Os resultados serão apresentados de forma gráfica e resumo narrativo, redigidos de acordo com o PRISMA-ScR.

OBJECTIVE: A scope review protocol that will be conducted according to the Joanna Briggs Institute (JBI) methodology to map and characterize available evidence on the use of mindfulness-based interventions for pain management in people diagnosed with breast cancer throughout different stages of treatment. METHOD: Studies conducted in adult women aged 18 years or older, who have received a diagnosis of breast cancer and who have undergone mindfulness-based interventions aimed at pain management will be included. The clinical context of the participants will be considered. We will include articles from quantitative and qualitative studies, in addition to the so-called grey literature, with no limits on language and time. A 3-step research strategy will be used. The following databases will be used: PubMed, CINAHL, Web of Science, VHL, PsycInfo, and Google Scholar. The results will be presented in a graphic and narrative summary, written in accordance with PRISMA-ScR.

Utilização da cannabis sativa para tratamento de dor crônica em cães / Use of cannabis sativa for the treatment of chronic pain in dogs / Uso de cannabis sativa para el tratamiento del dolor crónico en perros

A Cannabis sativa é uma planta que apresenta vários benefícios terapêuticos para animais, como tratamento da dor neuropática, inflamatória e osteoartrose. A dor é bastante recorrente na rotina clínica, sendo importante seu manejo para que seja ofertada uma melhor qualidade e conforto de vida para o paciente. O estudo objetivou identificar, a partir de evidências científicas, as características da utilização medicinal do uso de Cannabis Sativa no tratamento da dor crônica no cão, utilizando um dos seus princípios ativos, canabidiol (CBD). Foi feito uma revisão bibliográfica onde foi realizada a busca de estudos experimentais e relatos de caso em bases de dados eletrônicos, sendo incluídas fontes contendo a utilização do CBD em animais, que abordaram controle da dor, assim como escore avaliativo da dor antes, durante e após o tratamento proposto. Após eleger e analisar 54 estudos percebe-se que na medicina veterinária o uso do canabidio é insuficiente, uma vez que o foco da maior parte dos estudos clínicos é voltado para medicina humana. Ainda assim, a utilização de CBD mostrou-se eficaz, confirmando uma nova alternativa para o controle da dor em animais.(AU)

Cannabis sativa is a plant that has several therapeutic benefits for animals, such as the treatment of neuropathic and inflammatory pain and osteoarthritis. Pain is quite recurrent in the clinical routine, and its management is important to offer a better quality and comfort of life for the patient. The study aimed to identify, based on scientific evidence, the characteristics of the medicinal use of Cannabis Sativa in the treatment of chronic pain in dogs, using one of its active principles, cannabidiol (CBD). A bibliographical review was carried out in which experimental studies and case reports were searched in electronic databases, including sources containing the use of CBD in animals, which addressed pain control, as well as pain assessment score before, during and after the proposed treatment. After choosing and analyzing 54 studies, it is clear that in veterinary medicine the use of CBD is few, and the focus of clinical studies is on human medicine. The use of CBD proved to be effective, thus confirming a new alternative for pain control in animals.(AU)

El cannabis sativa es una planta que tiene varios beneficios terapéuticos para los animales, como el tratamiento del dolor neuropático e inflamatorio y la osteoartritis. El dolor es bastante recurrente en la rutina clínica, y su manejo es importante para ofrecer una mejor calidad y comodidad de vida al paciente. El estudio tuvo como objetivo identificar, con base en la evidencia científica, las características del uso medicinal de Cannabis Sativa en el tratamiento del dolor crónico en perros, utilizando uno de sus principios activos, el cannabidiol (CBD). Se realizó una revisión bibliográfica en la que se buscaron estudios experimentales y reportes de casos en bases de datos electrónicas, incluyendo fuentes que contengan el uso de CBD en animales, que abordaran el control del dolor, así como la puntuación de evaluación del dolor antes, durante y después del tratamiento propuesto. Después de elegir y analizar 54 estudios, queda claro que en medicina veterinaria el uso de cannabidio es insuficiente, ya que el foco de la mayoría de los estudios clínicos está en la medicina humana. Aun así, el uso de CBD demostró ser efectivo, confirmando una nueva alternativa para el control del dolor en animales.(AU)

Visão integrativa da dor em seu aspecto biopsicossocial / Integrative view of pain in its biopsychosocial aspect / Visión integradora del dolor en su vertiente biopsicosocial

Na definição padrão da medicina a nocicepção ou algesia é a transdução, condução e processamento de sinais nervosos aferentes gerados por nociceptores estimulados,resultando na percepção da dor. Os sinais de estímulos nocivos (mecânicos, térmicos ou químicos) são transmitidos principalmente através de dois tipos de nervos. As terminações nervosas das pequenas fibras mielinizadas a delta e as fibras C não mielinizadas estão localizadas na pele, tecido subcutâneo, periósteo, articulações, músculos e vísceras. As fibras beta mielinizadas, as maiores, normalmente transmitem estímulos não nocivos, como toque, vibração, pressão, movimento e propriocepção. No entanto, a entrada não nociva dessas fibras pode ser incorretamente processada em um sistema nervoso central alterado, resultando na percepção da dor (alodinia).

The neural basis underlying primary dysmenorrhea: evidence from neuroimaging and animal model studies / 生理学报

Primary dysmenorrhea (PDM), cyclic menstrual pain in the absence of pelvic anomalies, is characterized by acute and chronic gynecological pain disorders in childbearing age women. PDM strongly affects the quality of life of patients and leads to economic losses. PDM generally do not receive radical treatment and often develop into other chronic pain disorders later in life. The clinical treatment status of PDM, the epidemiology of PDM and chronic pain comorbidities, and the abnormal physiological and psychological characteristics of patients with PDM suggest that PDM not only is related to the inflammation around the uterus, but also may be related to the abnormal pain processing and regulation function of patients' central system. Therefore, exploring the brain neural mechanism of PDM is indispensable and important to understand the pathological mechanism of PDM, and is also a hotspot of brain science research in recent years, which will bring new inspiration to explore the target of PDM intervention. Based on the progress of the neural mechanism of PDM, this paper systematically summarizes the evidence from neuroimaging and animal model studies.

Astrocytes in Chronic Pain: Cellular and Molecular Mechanisms / 神经科学通报·英文版

Chronic pain is challenging to treat due to the limited therapeutic options and adverse side-effects of therapies. Astrocytes are the most abundant glial cells in the central nervous system and play important roles in different pathological conditions, including chronic pain. Astrocytes regulate nociceptive synaptic transmission and network function via neuron-glia and glia-glia interactions to exaggerate pain signals under chronic pain conditions. It is also becoming clear that astrocytes play active roles in brain regions important for the emotional and memory-related aspects of chronic pain. Therefore, this review presents our current understanding of the roles of astrocytes in chronic pain, how they regulate nociceptive responses, and their cellular and molecular mechanisms of action.

Chemogenetic and Optogenetic Manipulations of Microglia in Chronic Pain / 神经科学通报·英文版

Chronic pain relief remains an unmet medical need. Current research points to a substantial contribution of glia-neuron interaction in its pathogenesis. Particularly, microglia play a crucial role in the development of chronic pain. To better understand the microglial contribution to chronic pain, specific regional and temporal manipulations of microglia are necessary. Recently, two new approaches have emerged that meet these demands. Chemogenetic tools allow the expression of designer receptors exclusively activated by designer drugs (DREADDs) specifically in microglia. Similarly, optogenetic tools allow for microglial manipulation via the activation of artificially expressed, light-sensitive proteins. Chemo- and optogenetic manipulations of microglia in vivo are powerful in interrogating microglial function in chronic pain. This review summarizes these emerging tools in studying the role of microglia in chronic pain and highlights their potential applications in microglia-related neurological disorders.

Mechanosensitive Ion Channel TMEM63A Gangs Up with Local Macrophages to Modulate Chronic Post-amputation Pain / 神经科学通报·英文版

Post-amputation pain causes great suffering to amputees, but still no effective drugs are available due to its elusive mechanisms. Our previous clinical studies found that surgical removal or radiofrequency treatment of the neuroma at the axotomized nerve stump effectively relieves the phantom pain afflicting patients after amputation. This indicated an essential role of the residual nerve stump in the formation of chronic post-amputation pain (CPAP). However, the molecular mechanism by which the residual nerve stump or neuroma is involved and regulates CPAP is still a mystery. In this study, we found that nociceptors expressed the mechanosensitive ion channel TMEM63A and macrophages infiltrated into the dorsal root ganglion (DRG) neurons worked synergistically to promote CPAP. Histology and qRT-PCR showed that TMEM63A was mainly expressed in mechanical pain-producing non-peptidergic nociceptors in the DRG, and the expression of TMEM63A increased significantly both in the neuroma from amputated patients and the DRG in a mouse model of tibial nerve transfer (TNT). Behavioral tests showed that the mechanical, heat, and cold sensitivity were not affected in the Tmem63a-/- mice in the naïve state, suggesting the basal pain was not affected. In the inflammatory and post-amputation state, the mechanical allodynia but not the heat hyperalgesia or cold allodynia was significantly decreased in Tmem63a-/- mice. Further study showed that there was severe neuronal injury and macrophage infiltration in the DRG, tibial nerve, residual stump, and the neuroma-like structure of the TNT mouse model, Consistent with this, expression of the pro-inflammatory cytokines TNF-α, IL-6, and IL-1β all increased dramatically in the DRG. Interestingly, the deletion of Tmem63a significantly reduced the macrophage infiltration in the DRG but not in the tibial nerve stump. Furthermore, the ablation of macrophages significantly reduced both the expression of Tmem63a and the mechanical allodynia in the TNT mouse model, indicating an interaction between nociceptors and macrophages, and that these two factors gang up together to regulate the formation of CPAP. This provides a new insight into the mechanisms underlying CPAP and potential drug targets its treatment.

Professor ZHANG Wei-hua's clinical experience in chronic somatic pain treated with zhidong needling techniques / 中国针灸

The paper summarizes professor ZHANG Wei-hua's clinical experience for the treatment of chronic somatic pain with zhidong needling techniques. In terms of the characteristics of chronic somatic pain, professor ZHANG has integrated zhidong needling with acupuncture kinetic therapy. The satisfactory therapeutic effects are obtained by selecting the painful points and regions as the treatment sites and the specific techniques of zhidong needling depending on the size of affected area, the depth of illness, the size and shape of the cord-like muscle, etc. Five techniques of zhidong needling are used accordingly with twirling, pulling, lifting and thrusting, surrounding needling methods involved, as well as with the manipulation speed, direction and frequency considered.

The Objective Assessment of Event-Related Potentials: An Influence of Chronic Pain on ERP Parameters / 神经科学通报·英文版

The article presents an original method for the automatic assessment of the quality of event-related potentials (ERPs), based on the calculation of the coefficient ε, which describes the compliance of recorded ERPs with some statistically significant parameters. This method was used to analyze the neuropsychological EEG monitoring of patients suffering from migraines. The frequency of migraine attacks was correlated with the spatial distribution of the coefficients ε, calculated for EEG channels. More than 15 migraine attacks per month was accompanied by an increase in calculated values in the occipital region. Patients with infrequent migraines exhibited maximum quality in the frontal areas. The automatic analysis of spatial maps of the coefficient ε demonstrated a statistically significant difference between the two analyzed groups with different means of migraine attack numbers per month.