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1.
Rev. chil. neurocir ; 40(1): 8-11, jul. 2014. ilus
Article in English | LILACS | ID: biblio-831375

ABSTRACT

Introducción/Objetivos: El lóbulo temporal anterior tiene importantes estructuras subcorticales, especialmente fibras blancas que llevan la información visual. La comprensión de esta región anatómica, importantes para la práctica microquirúrgica, se basa en técnicas de disección de fibras. Ellos proporcionan perspectiva tridimensional de esta región y añaden un enfoque quirúrgico exitoso para el tratamiento de las lesiones temporales mesiales. El propósito de este trabajo es el estudio de la anatomía de la pared lateral del ventrículo lateral con el fin de determinar una zona libre de la radiación óptica. Métodos: Se diseccionaron diez hemisferios cerebrales, preparados de acuerdo con técnicas de Klingler. Se utilizan espátulas de madera con puntas de diferentes tamaños. La radiación óptica fue delimitada y las medidas se tomaron a partir de esta estructura para el polo temporal, que se utiliza como punto de referencia. Resultados: Abordajes para el cuerno temporal superior a 27 mm más allá del polo temporal pueden cruzar asa de Meyer y determinar un perjuicio a la radiación óptica con los consiguientes déficits en los campos visuales. Conclusión: La determinación de la zona de libre de fibras de radiación óptica es factible. En este trabajo se podría inferir que el área libre de la radiación óptica se encuentra en la región anterioinferior del lóbulo temporal a una distancia de hasta 2,7 centímetros desde el polo temporal y permite el acceso a el hipocampo y la amígdala durante la cirugía de la epilepsia. Resecciones más grandes que estas medidas permiten aclarar de una lesión a la radiación óptica con los consiguientes déficits en los campos visuales.


Introduction/Objective: The anterior temporal lobe has important subcortical structures, especially white fibers that lead visual information. Understanding this anatomical region, important for microsurgical practice, is based on fibers dissection techniques. They provide three-dimensional perspective for this region and add a successful surgical approach for the treatment of mesial temporal lesions. The purpose of this paper is to study the anatomy of the lateral wall of the lateral ventricle in order to determine a free area of the optical radiation. Methods: Ten cerebral hemispheres were dissected, prepared according to Klingler´s techniques. Wooden spatulas with tips of various sizes were used. The optical radiation was delimited and measures were taken from this structure to the temporal pole, used as a reference point. Results: Approaches to the temporal horn larger than 27 mm beyond the temporal pole can cross Meyer´s loop and determine injury to the optical radiation with consequent postoperatively deficits in visual fields. Conclusion: The determination of free area of optical radiation fibers is feasible. In this work we could infer that free area of optical radiation is located in the anterioinferior region of the temporal lobe at a distance of up to 2.7 centimeters from the temporal pole and allows access to the hippocampus and amygdala during epilepsy surgery. Larger resections than these measures can possibly determine injury to the optical radiation with consequent deficits in visual fields.


Subject(s)
Humans , Dissection/methods , Epilepsy, Temporal Lobe/surgery , Temporal Lobe/anatomy & histology , Temporal Lobe/surgery , Temporal Lobe/injuries , Superior Colliculi , Visual Pathways
2.
Arq. neuropsiquiatr ; 63(2b)jun. 2005. tab, graf
Article in English | LILACS | ID: lil-404611

ABSTRACT

INTRODUÇÃO: A indicação do tratamento cirúrgico das lesões parenquimatosas temporais de origem traumática é controversa. Analisaram-se os parâmetros tomográficos que poderiam ser úteis nesta decisão terapêutica. MÉTODO: Os achados tomográficos de 69 patientes foram analisados retrospectivamente em relação a: 1) efeitos das lesões (classificados em 4 variáveis: desvio de estruturas medianas, estado das cisternas, dos ventrículos e dos sulcos periféricos); e 2) características das lesões: localização anterior, posterior ou ântero-posterior (definida por um plano coronal tangente aos pedúnculos cerebrais) e diâmetro médio-lateral. RESULTADOS: Quando nenhuma ou uma das variáveis acima mencionadas foi encontrada alterada, foi instituído o tratamento conservador (22 em 38 lesões). Em dois casos, as quatro variáveis estavam alteradas, sendo instituído o tratamento cirúrgico. Lesões anteriores, ântero-posteriores e posteriores medindo 21, 23 e 28 mm, respectivamente, tiveram 50% de chance de serem removidas. CONCLUSÃO: Nos casos operados, quanto mais anterior a lesão esteve no lobo temporal, menor foi seu diâmetro.


Subject(s)
Humans , Brain Injuries/surgery , Temporal Lobe/injuries , Brain Injuries , Logistic Models , Retrospective Studies , Tomography, X-Ray Computed , Temporal Lobe/surgery
3.
Journal of Korean Medical Science ; : 91-95, 2002.
Article in English | WPRIM | ID: wpr-87472

ABSTRACT

Korean written language is composed of ideogram (Hanja) and phonogram (Hangul), as Japanese consists of Kanji (ideogram) and Kana (phonogram). Dissociation between ideogram and phonogram impairment after brain injury has been reported in Japanese, but few in Korean. We report a 64-yr-old right-handed man who showed alexia with agraphia in Hanja but preserved Hangul reading and writing after a left posterior inferior temporal lobe infarction. Interestingly, the patient was an expert in Hanja; he had been a Hanja calligrapher over 40 yr. However, when presented with 65 basic Chinese letters that are taught in elementary school, his responses were slow both in reading (6.3 sec/letter) and writing (8.8 sec/letter). The rate of correct response was 81.5% (53 out of 65 letters) both in reading and writing. The patient's performances were beyond mean-2SD of those of six age-, sex-, and education-matched controls who correctly read 64.7 out of 65 and wrote 62.5 out of 65 letters with a much shorter reaction time (1.3 sec/letter for reading and 4.0 sec/letter for writing). These findings support the notion that ideogram and phonogram can be mediated in different brain regions and Hanja alexia with agraphia in Korean patients can be associated with a left posterior inferior temporal lesion.


Subject(s)
Humans , Male , Middle Aged , Cerebral Infarction/complications , Dyslexia/etiology , Magnetic Resonance Imaging , Task Performance and Analysis , Temporal Lobe/injuries , Writing
4.
J. bras. psiquiatr ; 41(10): 495-502, nov.-dez. 1992. ilus
Article in Portuguese | LILACS | ID: lil-129157

ABSTRACT

Säo apresentadas e discutidas as consequências neuropsicológicas dos traumatimos cranianos. O autor relata os sintomas e síndromes mais comuns e apresenta dois casos de síndrome de lobo frontal pós-traumática


Subject(s)
Humans , Male , Adult , Brain Injuries/complications , Head Injuries, Closed/physiopathology , Personality Disorders/etiology , Accidents, Traffic , Automobiles , Cognition Disorders/etiology , Depression/etiology , Temporal Lobe/injuries , Memory Disorders/etiology , Affective Disorders, Psychotic/etiology
5.
Rev. neurol. Argent ; 16(3): 122-6, 1991. ilus
Article in Spanish | LILACS | ID: lil-105709

ABSTRACT

Con motivo de la publicación de un caso en el cual la risa involuntaria e inmotivada constituye la única manifestación clínica de Epilepsia en la edad adulta, se hace una revisión histórica del problema, se discute la fisiología de la risa normal, se enmarca la Epilepsia Gelástica en el contexto de la risa patológica y se comentan múltiples etiologías, diversas localizaciones lesionales y un espectro de patrones clínicos y electroencefalográficos en relación con Epilepsia Gelástica


Subject(s)
Epilepsy/etiology , Laughter , Brain Neoplasms/complications , Niemann-Pick Diseases/complications , Epilepsy/diagnosis , Epilepsy/physiopathology , Temporal Lobe/injuries , Psychosurgery/adverse effects
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