音列の規則性の知覚に関わるラット聴覚野の神経活動

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2015/09/01

タイトル(英語): Auditory Cortical Activity Related to Perception of Regularity in Tone Sequence

著者名: 雨宮　知樹（東京大学大学院情報理工学系研究科），野田　貴大（東京大学先端科学技術研究センター），白松（磯口）　知世（東京大学先端科学技術研究センター），神崎　亮平（東京大学先端科学技術研究センター），高橋　宏知（東京大学先端科学技術研究センター）

著者名(英語): Tomoki Amemiya (Graduate School of Information Science and Technology, The University of Tokyo), Takahiro Noda (Research Center for Advanced Science and Technology, The University of Tokyo), Tomoyo I. Shiramatsu (Research Center for Advanced Science and Technology, The University of Tokyo), Ryohei Kanzaki (Research Center for Advanced Science and Technology, The University of Tokyo), Hirokazu Takahashi (Research Center for Advanced Science and Technology, The University of Tokyo)

キーワード: 聴覚野，ラット，音列，局所電場電位，位相固定性，微小電極アレイ　　Auditory Cortex，Rat，Tone Sequence，Local Field Potential，Phase Coherence，Microelectrode Array

要約(英語): Repetitive sound sequences are easily distinguished from other background sounds. The present study investigated the neural mechanisms underlying the perception of repetitive sound sequences. We measured neural responses at the layer IV in auditory cortex of anesthetized rats and compared evoked responses to repetitive tone sequences and those to random tone sequences. Our results demonstrated that repetition of tone sequences modulated both amplitude and band-specific phase coherence of auditory evoked responses. The amplitude of evoked responses depended on a preceding tone in a given sequence, possibly due to the forward masking. The phase coherence tended to be higher during the repetitive sequences than during random sequences, specifically in the low-gamma band. The enhancement of amplitude to a specific tone was associated with an increase of phase coherence in the low gamma band. Thus, the co-modulation of amplitude and phase coherence of evoked responses plays an important role in perception of sound regularity.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.135 No.9 （2015） 特集：サステナブル社会・先端応用へ向けたレーザプロセシング技術

本誌掲載ページ: 1106-1111 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/135/9/135_1106/_article/-char/ja/