Behavioral fluctuation reflecting theta-rhythmic activation of sequential working memory

Author:

Ushiyama Junichi1,Ideriha Takuya1

Affiliation:

1. Keio University

Abstract

Abstract Sequential working memory, the ability to actively maintain sequential information, is essential for our cognition and has been considered to be represented rhythmically within the theta (3–7 Hz) range. In the current study, we predicted that if the sequential information is truly activated rhythmically, there should be periodic fluctuation in our behavior where the easiness/quickness to recall the information rises and falls according to the theta rhythm. We conducted detailed analyses on reaction times (RT) for retrieving sequential and non-sequential information in six experiments (total n = 110). The results revealed that the RT for recalling the sequential information showed fluctuation in the theta range and was significantly stronger than that observed when sequential order was not necessary to remember. Taken together, we revealed that our behavior displayed theta-rhythmic fluctuation when recalling sequential information in a relatively large sample, supporting theta phase-dependent coding of sequential working memory.

Publisher

Research Square Platform LLC

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