[Motor representation of the facial musculature in the rabbit neocortex].
Motor responses (MRs) of single vibrissae and facial muscles in alert rabbits to intracortical microstimulation (ICMS) were observed visually and recorded by means of photodiodes. Moderate ICMS evoked only contralateral MRs of long caudal vibrissae; however motor responses of short rostral vibrissae, rostral part of the upper lip and lower jaw were often bilateral. Two levels of low-threshold ICMS were revealed in the cortical layers: at the depth of 0,6-1,0 mm and of 1,4-1,8 mm. Motor representation of vibrissae occupies a large territory within the frontal cortex, 1,5-3,5 mm laterally from the sagittal suture and 0-10 mm rostrally from bregma. Lip and jaw representations are located laterally from the vibrissal field, with some overlapping.
D000818:Animals; D001931:Brain Mapping; D004558:Electric Stimulation; D005145:Face; D005152:Facial Muscles / Q000294:innervation*; D006197:Hair; D008046:Lip / Q000294:innervation; D008334:Mandible / Q000294:innervation; D009044:Motor Cortex / Q000502:physiology*; D011817:Rabbits; D012679:Sense Organs / Q000294:innervation
Motornoe predstavitel'stvo litsevoĭ muskulatury v neokortekse krolika.