[Unilateral or bilateral asterixis in cases of thalamic or parietal lesions: an afferent motor disorder?].

Four cases are described in which asterixis was the main symptom of a focal brain lesion: controlateral asterixis from thalamic hemorrhage or infarction, and bilateral asterixis from posterior parietal hematoma or glioblastoma. The features of this symptom and the localization of the causal lesions make it possible to consider asterixis as a focal and transitory afferent motor dysfunction.