The morphological variability, diameter, and length of the anterior communicating artery (ACoA) are important factors in clinical and surgical decisions. This artery presents branches that supply the optic nerves and chiasm, the lamina terminalis, the hypothalamus, and the subcallosal region. The ACoA has the most frequent incidence of saccular aneurysms in the anterior portion of the circle of Willis. Lesions to the ACoA's branches may be related to neuropsychological sequelae such as amnesia, confabulation and personality changes, besides other basal ganglia syndromes. In this paper, anatomical studies of the ACoA and its branches are reviewed and the results of an anatomical study carried out in our laboratory presented.
A síndrome de Guillain-Barré se caracteriza pelo comprometimento de nervos periféricos, determinando diminuição de força de modo simétrico, nos músculos proximais dos membros. A estas manifestações suguem-se as alterações de sensibilidade, de trofismo, de disfunção do sistema nervoso autônomo.A lombociatalgia associada aos sinais clínicos de compressão meningoradicular pode ser a apresentação inicial desta síndrome, conforme mostramos no seguinte relato. Uma semana após o paciente experimentou parestesias na face póstero-lateral da coxa e perna esquerda e no exame neurológico mostrava diminuição da dorsiflexâo do pé e extensão do hálux esquerdo, diminuição dos reflexos patelar e aquiliano e sinal
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