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      Interpersonal brain synchronization with instructor compensates for learner's sleep deprivation in interactive learning

      , , , ,
      Biochemical Pharmacology
      Elsevier BV

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          Abstract

          <p class="first" id="d37132414e110">Recent advances shifted the focus on single-brain functioning toward two-brain communication during learning interactions, following the demonstration that interpersonal brain synchronization (IBS) can track instructor-learner information exchange. Here, we investigated (i) whether sleep deprivation (SD) that potentially impacts both social interactions and learning abilities modulates IBS, and (ii) conversely whether and to what extent IBS might compensate for SD-related learning deficits. Instructors (always with regular sleep, RS) were asked to teach numerical reasoning strategies to learners (either SD or RS), during which the activity of both brains was simultaneously recorded using functional near-infrared spectroscopy (fNIRS). SD learners initially performed below their baseline level, worse than RS learners, but learning improvement was comparable between RS and SD conditions after learning with the instructor. IBS within the instructor-learner dyads was higher in the SD (vs. RS) condition in the left inferior frontal cortex. In addition, clustered IBS (estimated by nonnegative matrix factorization) was correlated with performance improvement. Finally, Granger Causality analyses revealed biased causality with higher instructor-to-learner than learner-to-instructor directionality in brain signal processing. Together, these results indicate that SD-related learning deficits can to some extent be compensated via interactions with an instructor, as reflected by increased IBS and preserved learning ability. It suggests an essential role of the instructor in driving synchrony between teaching and SD learning brains during interactions. </p>

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          Author and article information

          Journal
          Biochemical Pharmacology
          Biochemical Pharmacology
          Elsevier BV
          00062952
          September 2021
          September 2021
          : 191
          : 114111
          Article
          10.1016/j.bcp.2020.114111
          32569629
          7af09bf5-7b03-4499-9865-196b320ba640
          © 2021

          https://www.elsevier.com/tdm/userlicense/1.0/


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