Cortical Brain Functions ­ The Brodmann Legacy in the 21st Century

In 1909, Korbinian Brodmann described 52 functional brain areas, 43 of them found in the human brain. More than a century later, his devoted functional map was incremented by Glasser et al in 2016, using functional nuclear magnetic resonance imaging techniques to propose the existence of 180 functional areas in each hemisphere, based on their cortical thickness, degree of myelination (cortical myelin content), neuronal interconnection, topographic organization, multitask answers, and assessment in their resting state. This opens a huge possibility, through functional neuroanatomy, to understand a little more about normal brain function and its functional impairment in the presence of a disease.

Neurofisiología de la empatía: una revisión de investigaciones / Neurophysiology of empathy: a review of investigations

La empatía es un constructo con múltiples definiciones y modelos explicativos, los cuales se han conformado a partir de observaciones e investigaciones en humanos y otros animales. En el presente, se revisaron estudios en humanos sanos, que vincula empatía con conducta motora, sistema nervioso autónomo y central. La evidencia presentada apoya la asociación entre empatía y el sistema de neuronas en espejo, la imitación facial, el contagio pupilar, el sistema autonómico, la interocepción, la conectividad neuronal, la ínsula, el cíngulo, entre otras. Finalmente, esta revisión incentiva el estudio, investigación y desarrollo de las múltiples áreas y disciplinas que tratan con la empatía.

Brain stimulation used as biofeedback in neuronal activation of the temporal lobe area in autistic children / Estimulação cerebral usada como biofeedback na ativação neural do lobo temporal em crianças autistas

ABSTRACT This study focused upon the functional capacity of mirror neurons in autistic children. 30 individuals, 10 carriers of the autistic syndrome (GCA), 10 with intellectual impairments (GDI), and 10 non-autistics (GCN) had registered eletroencephalogram from the brain area theoretically related to mirror neurons. Data collection procedure occurred prior to brain stimulation and after the stimulation session. During the second session, participants had to alternately process figures evoking neutral, happy, and/or sorrowful feelings. Results proved that, for all groups, the stimulation process in fact produced additional activation in the neural area under study. The level of activation was related to the format of emotional stimuli and the likelihood of boosting such stimuli. Since the increase of activation occurred in a model similar to the one observed for the control group, we may suggest that the difficulty people with autism have at expressing emotions is not due to nonexistence of mirror neurons.

RESUMO O estudo verificou a capacidade funcional dos neurônios-espelho em crianças autistas. 30 indivíduos, sendo 10 portadores da síndrome autista (GCA), 10 com deficiência intelectual (GDI), e 10 não-autistas (GCN) tiveram registrado o eletroencefalograma da área do cérebro relacionada teoricamente com os neurônios espelho. O procedimento de coleta de dados ocorreu antes e após uma sessão de estimulação cerebral. Durante a segunda coleta de dados, os participantes tiveram de processar alternadamente figuras evocando sentimentos neutros, felizes e tristes. Os resultados provaram que, para todos os grupos, o processo de estimulação de fato produziu ativação adicional na área neural em estudo. O nível de ativação foi relacionada com o formato dos estímulos emocionais. Uma vez que o aumento da ativação ocorreu em um modelo semelhante ao observado para o grupo controle, pode-se sugerir que as pessoas com autismo têm dificuldade em expressar emoções não devido à inexistência de neurônios-espelho.

Interaction between affordance and handedness recognition: a chronometric study

The visualization of tools and manipulable objects activates motor-related areas in the cortex, facilitating possible actions toward them. This pattern of activity may underlie the phenomenon of object affordance. Some cortical motor neurons are also covertly activated during the recognition of body parts such as hands. One hypothesis is that different subpopulations of motor neurons in the frontal cortex are activated in each motor program; for example, canonical neurons in the premotor cortex are responsible for the affordance of visual objects, while mirror neurons support motor imagery triggered during handedness recognition. However, the question remains whether these subpopulations work independently. This hypothesis can be tested with a manual reaction time (MRT) task with a priming paradigm to evaluate whether the view of a manipulable object interferes with the motor imagery of the subject's hand. The MRT provides a measure of the course of information processing in the brain and allows indirect evaluation of cognitive processes. Our results suggest that canonical and mirror neurons work together to create a motor plan involving hand movements to facilitate successful object manipulation.

Regulación de la conducta humana: castigo altruista / The Regulation of Human Behaviour: Altruistic Punishment

Humanos y animales desarrollan conductas similares que comparten un objetivo final común: la evolución y la supervivencia de la especie. El castigo hacia otro individuo de la misma especie que se comporta injuriosamente dentro de un grupo social, es una de ellas. El castigo está compuesto por dos variables: una que satisface un fin individualista, llamado "castigo egoísta", destinado a proteger intereses personales, familiares o ejercer venganza; la segunda, el "castigo altruista", que persigue como fin un beneficio social relacionado con mantener normas cooperativas de comportamiento y en virtud del cual, notoriamente, un individuo está dispuesto a sufrir voluntariamente un costo personal a fin de lograr su objetivo. Esta revisión pretende esclarecer los procesos que determinan el castigo como una conducta biológica y culturalmente necesaria para la adquisición del aprendizaje de normas de comportamiento, con el fin de garantizar y promover la cooperación social como instancia necesaria para la evolución...

Humans and animals develop similar behaviors that share a common final goal: the evolution and the survival of the species. Punishment to another individual of the same species that behaves abusively within a social gropu, is one of them. The punishment is composed by two variables: one that satisfies a so-called individualistic "elfish punishment", aimed to protect personal or familiar interest as well as to take revenge; the second, the "altruistic punishment", whic pursues a social benefit related to the maintenance of cooperative norms of behavior where by, dramatically, an individual is willing to voluntarily undergo a personal cost to reach its goal. This review aims to clarify the processes that determine the punishment as a biologically and culturally necessary behavior for the acquisition of learning of behavior rules, with the aim to ensure and promote social cooperation as a necessary requirement for evolution...