期刊
TRENDS IN NEUROSCIENCES
卷 37, 期 7, 页码 357-369出版社
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tins.2014.04.001
关键词
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资金
- Netherlands Organization for Scientific Research (NWO) [453-09-002]
- ALW Open Competition Grant [ALW2PJ/10071]
- MaGW Open Competition Grant [822-02-011]
- Netherlands Initiative Brain and Cognition (NIHC), Organization for Scientific Research (NWO) [056-14-011]
Sensory systems must rely on powerful mechanisms for organizing complex information. We propose a framework in which inhibitory alpha oscillations limit and prioritize neuronal processing. At oscillatory peaks, inhibition prevents neuronal firing. As the inhibition ramps down within a cycle, a set of neuronal representations will activate sequentially according to their respective excitability. Both top-down and bottom-up drives determine excitability; in particular, spatial attention is a major top-down influence. On a shorter time scale, fast recurrent inhibition segments representations in slots 10-30 ms apart, generating gamma-band activity at the population level. The proposed mechanism serves to convert spatially distributed representations in early visual regions to a temporal phase code: that is, 'to-do lists' that can be processed sequentially by downstream regions.
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