Somatotopic arrangement and corticocortical inputs of the hindlimb region of the primary motor cortex in the macaque monkey.
Neurosci Res
; 40(1): 9-22, 2001 May.
Article
em En
| MEDLINE
| ID: mdl-11311401
ABSTRACT
Using Japanese monkeys, we examined the somatotopic organization of the hindlimb region of the primary motor cortex (MI) with intracortical microstimulation. In the hindlimb region of the MI, areas representing distal movements (digits and ankle joints) were basically surrounded by those representing proximal movements (knee and hip joints). Thus, the hindlimb region of the MI has a nested or horseshoe-like somatotopic representation. We then examined the topographic organization of corticocortical projections to the hindlimb region of the MI by the retrograde double-labeling technique one monkey received paired injections of Fast blue (FB) and Diamidino yellow (DY) into hindlimb or forelimb representation of the MI, respectively, while two monkeys received those of FB and DY into proximal or distal representation of the hindlimb region of the MI, respectively. The neurons projecting to the hindlimb region of the MI were located in cortical areas largely separate from those projecting to the forelimb region of the MI. On the other hand, we found a substantial overlap of corticocortical neurons projecting to the proximal and distal parts of the hindlimb region of the MI in the dorsal division of the premotor cortex and the cingulate motor areas.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Membro Posterior
/
Macaca
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Córtex Motor
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Movimento
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Vias Neurais
/
Neurônios
Limite:
Animals
Idioma:
En
Revista:
Neurosci Res
Ano de publicação:
2001
Tipo de documento:
Article