A reappraisal of rat motor cortex organization by intracortical microstimulation

The organization of the motor cortex was reinvestigated with intracortical microstimulation, in light-anaesthetized (ketamine) rats. A posterolateral (PL) vibrissae area was found in addition to the rostral one, and blinks of the contralateral eyelids were elicited from a part of this PL area. Sever...

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Bibliographic Details
Published inBrain research Vol. 344; no. 1; p. 49
Main Authors Gioanni, Y, Lamarche, M
Format Journal Article
LanguageEnglish
Published Netherlands 30.09.1985
Subjects
Animals
Brain Mapping
Electric Stimulation
Electromyography
Motor Cortex - physiology
Rats
Rats, Inbred Strains
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Summary:The organization of the motor cortex was reinvestigated with intracortical microstimulation, in light-anaesthetized (ketamine) rats. A posterolateral (PL) vibrissae area was found in addition to the rostral one, and blinks of the contralateral eyelids were elicited from a part of this PL area. Several cortical representations such as neck or tail were largely overlapping with neighbouring areas. Vegetative effects (mainly myosis and swallowing) were obtained from a medial cortical strip. Within the PL vibrissae area, a topical arrangement related to the vibrissal rows was observed, whereas in the leg areas, no individual representation of muscles could be evidenced. These results are compared with the maps previously published, and discussed in terms of specificity, musculotopy and overlapping of motor areas.
ISSN:0006-8993
DOI:10.1016/0006-8993(85)91188-6