[Functional properties of efferent zones of the motor cortex which project to ipsilateral and contralateral face muscles].
In both intact (4 animals) and lesioned (2 preparations with contralateral motor cortex ablation and 1 animal with transection of the rostral two thirds of the corpus callosum) cats, three different types of efferent zones were identified in the face motor cortex by the technique of microstimulation: contralateral, ipsilateral and bilateral efferent zones. The three types of efferent zones had different organizational features such as location, thresholds of effective sites and latencies of motor responses. Mean thresholds of effective sites from ipsilateral and bilateral efferent zones in lesioned animals were not significantly higher than those in intact preparations. In both intact and lesioned animals, neurons endowed with contralateral, bilateral and ipsilateral receptive fields were isolated from the three types of efferent zones.
Franchi
G
G
Guandalini
P
P
Spidalieri
G
G
D000818:Animals; D002415:Cats; D003337:Corpus Callosum / Q000502:physiology*; D004525:Efferent Pathways / Q000502:physiology; D004558:Electric Stimulation; D005152:Facial Muscles / Q000294:innervation*; D009044:Motor Cortex / Q000502:physiology*; D009476:Neurons, Efferent / Q000502:physiology*
Proprietà funzionali delle zone efferenti della corteccia motrice che proiettano a muscoli ipsilaterali e contralaterali della faccia.