Biologia da linguagem desde a afasia pós ataque cerebrovascular: reporte de três casos e revisão do assunto

Conteúdo do artigo principal

Margarita Rosa Escobar Díez
Juan Camilo Suárez Escudero

Resumo

A linguagem, capacidade própria do ser humano de comunicar-se e interagir com seus pares, encontra-se determinado por um complexo conjunto de redes neuronais inicialmente descritas de ordem unicamente cortical, e na atualidade descritas de ordem cortico-subcortical relacionadas entre si. Sua funcionalidade se vê afetada com frequência por múltiplas etiologias. A principal causa de afasia adquirida é o ataque cerebrovascular. É objetivo documentar e descrever os circuitos cortico-subcorticais da linguagem alterados em pacientes com afasia pós ACV, mediante o reporte de três casos e revisão de tema sobre as redes neurológicas da linguagem. Três pacientes pós ACV de áreas irrigadas pela artéria cerebral média do hemisfério esquerdo, com lesão de várias estruturas corticais e subcorticais. Em todos se encontrou dano em áreas diferentes a Broca e Wernicke predominando alterações em estruturas da rede dorsal da linguagem. Nos pacientes reportados o dano vascular se centrou em estruturas da rede dorsal da linguagem no hemisfério dominante, comprometendo estruturas corticais e subcorticais simultaneamente, aspecto que se relaciona com a complexidade de estruturas, redes e mecanismos envolvidos na linguagem humana. São estruturas da linguagem: ínsula, núcleo caudado, região mesial temporal, adicional às clássicas áreas perisilvianas esquerda, que de maneira global e interconectadas a partir de correntes de processamento cortical, produzem a linguagem.

Palavras-chave:
afasia, afasia de broca, afasia de Wernicke, linguagem, neurofisiologia, acidente vascular cerebral

Detalhes do artigo

Biografia do Autor

Margarita Rosa Escobar Díez, Instituto Neurológico de Colombia

Psicóloga, especialista em reabilitação neuropsicológica. Unidade de Neuropsicologia Instituto de Neurologia da Colômbia (Indec). Medellín - Colômbia.

Juan Camilo Suárez Escudero, Universidad Pontificia Bolivariana

Médico, especialista em neuro-reabilitação reabilitação neuropsicológica. Coordenador da Unidade de Reabilitação Neuromotora, Sensorial e de Linguagem do Indec. Coordenador acadêmico do programa de reabilitação neuropsicológica da Universidade CES. Professor da Faculdade de Medicina e Psicologia da Universidade CES. Professor e pesquisador da Faculdade de Medicina e Psicologia Universidad Pontificia Bolivariana. Medellín - Colômbia.

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