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Microcircuit mechanisms for representation and retrieval of associative object memory in macaque temporal cortex

https://repo.qst.go.jp/records/73264
https://repo.qst.go.jp/records/73264
95918e8d-11c1-4c4d-8890-fa36cee3e0fb
Item type 会議発表用資料 / Presentation(1)
公開日 2016-12-28
タイトル
タイトル Microcircuit mechanisms for representation and retrieval of associative object memory in macaque temporal cortex
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_c94f
資源タイプ conference object
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 Hirabayashi, Toshiyuki

× Hirabayashi, Toshiyuki

WEKO 721839

Hirabayashi, Toshiyuki

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平林 敏行

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WEKO 721840

en 平林 敏行

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内容記述タイプ Abstract
内容記述 Inferior temporal (IT) cortex in primates serves as a storehouse of visual long-term memory. Although neuronal responses in this region have been well characterized, it remains unknown how individual neurons interact to form a functional circuit for mnemonic functions. Here, I will discuss our recent findings on the microcircuit mechanisms in the macaque IT cortex for associative object memory, focusing on the following two topics. The first topic is dynamic operation of microcircuit during memory retrieval. We found a directed signal flow between functionally different classes of memory neurons, one of which maintains the presented cue information and the other encodes the to-be-recalled target. The observed dynamics and direction of the signal flow suggest both mechanisms for generation and subsequent propagation of retrieval signal in the IT cortex. The second topic is hierarchical object processing across cortical areas. Representation of a given feature of visual objects has been believed to be constructed in the cortical area where that representation is prevalent. However, another possible scheme is that some preparatory codes of a given feature are already generated in a lower-order area before they become predominant in a higher-order area. Consistent with the latter hypothesis, we found two distinct microcircuits that generated and increased the representation of object association in successive lower- and higher-order areas in the IT cortex, respectively. Together, these results demonstrate that directed signal flow between single neurons of task-trained macaques can tell us the computational principles of cortical microcircuits that implement cognitive demands in the primate brain.
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内容記述タイプ Other
内容記述 10th FENS Forum of Neuroscience 2016
発表年月日
日付 2016-07-04
日付タイプ Issued
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