Bi‐directional interactions between visual areas in the awake behaving cat
作者:
Corrado Bernasconi,
Astrid von Stein,
Carl Chiang,
Peter König,
期刊:
NeuroReport
(OVID Available online 2000)
卷期:
Volume 11,
issue 4
页码: 689-692
ISSN:0959-4965
年代: 2000
出版商: OVID
关键词: Bottom-up;Cat;Causality;Cerebral cortex;Feedback;Feed-forward;Local field potential;Top-down;Visual system
数据来源: OVID
摘要:
The study of the cooperativity among cortical areas is essential to our understanding of brain functioning. Here we investigated the relative contributions of top-down and bottom-up directed interactions between area 17 and area 7 of the cat visual system. Bipolar local field potentials were recorded while the animals performed a go/no-go task or were in a quiet resting state. The data were analyzed by applying measures of interaction based on the Wiener–Granger causality concept. We found that during the visual task top-down directed interactions were of a similar magnitude as the bottom-up component. Second, interareal couplings tended to increase in conditions requiring a discriminative effort. Third, during behaviors not dominated by visual processing non-directed interactions increased.
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