[Clinical and cognitive study of apraxia in cortico-basal atrophy. A selective disorder of the production system].
The aim of this study was to characterize the different processes underlying apraxic disorders in cortico-basal degeneration. Three patients were submitted to a prospective paradigm elaborated in the theoretical framework proposed by Roy and Square (1985). This cognitive model postulates a two-steps system in the control mechanisms in limb praxis: the conceptual system and the production system. Our results, strictly similar for the three patients, showed a sparing of the conceptual system and an impairment of the production system with a dramatic lack in the control of the temporal and spatial aspects of the gestures. These results suggest a dysfunction of the premotor cortex including the supplementary motor area.
Service de Neurologie, CHU Côte de Nacre, Caen.
A
A
Blondel
F
F
Eustache
S
S
Schaeffer
R M
RM
Marié
B
B
Lechevalier
V
V
de la Sayette
D000368:Aged; D001072:Apraxias; D003073:Cognitive Dissonance; D006801:Humans; D008297:Male; D008875:Middle Aged