Bilateral impact of unilateral visual cortex lesions on the superior colliculus.
Exp Brain Res
; 151(4): 542-7, 2003 Aug.
Article
en En
| MEDLINE
| ID: mdl-12802555
ABSTRACT
We examined the functional impact of a long-standing, unilateral primary visual cortex lesion on the superior colliculus (SC) using radiolabeled 2-deoxyglucose (2DG) as a marker of neural activity. In accord with known corticotectal connectivity and functional influence, 2DG uptake in the superficial layers of the ipsilesional SC was decreased. We also found a decrease in the superficial layers of the contralesional SC. These data suggest that modifications in activity in one SC can have a substantial influence on activity in its contralateral partner, and that processing in one visual hemifield does not occur independently of processing of signals in the opposite hemifield. The effects are not mediated by the contralateral hemisphere but are probably mediated by intercollicular circuitry.
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Banco de datos:
MEDLINE
Asunto principal:
Corteza Visual
/
Colículos Superiores
/
Lateralidad Funcional
Límite:
Animals
Idioma:
En
Revista:
Exp Brain Res
Año:
2003
Tipo del documento:
Article
País de afiliación:
Estados Unidos