Synchronization of visual responses in the superior colliculus of awake cats.
Neuroreport
; 12(1): 43-7, 2001 Jan 22.
Article
em En
| MEDLINE
| ID: mdl-11201089
ABSTRACT
Multi-unit responses to moving stimuli were recorded simultaneously from several sites in the superior colliculus of awake cats. Correlation analysis revealed that response synchronization was a prominent feature of visually evoked neural activity in both superficial and deep collicular layers. Responses at about half of the recordings separated by < or = 1 mm showed significant correlations. The synchronized responses oscillated in the gamma frequency range (30-70 Hz) which contrasts to conditions in anaesthetized cats where oscillations predominantly occurred in the alpha and beta frequency range (10-20 Hz). Response synchronization was most pronounced with coherent motion stimuli and broke down with incoherent stimuli. These results agree with previous findings on corticotectal synchronization and support the hypothesis that synchronization in the millisecond range serves to group collicular neurons into functionally coherent assemblies.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Estimulação Luminosa
/
Vigília
/
Colículos Superiores
/
Potenciais Evocados Visuais
/
Neurônios
Limite:
Animals
Idioma:
En
Revista:
Neuroreport
Assunto da revista:
NEUROLOGIA
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Alemanha