Hemispheric differences between left and right supramarginal gyrus for pitch and rhythm memory

Nora K. Schaal*, Bettina Pollok, Michael J. Banissy

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

23 Citations (Scopus)

Abstract

Functional brain imaging studies and non-invasive brain stimulation methods have shown the importance of the left supramarginal gyrus (SMG) for pitch memory. The extent to which this brain region plays a crucial role in memory for other auditory material remains unclear. Here, we sought to investigate the role of the left and right SMG in pitch and rhythm memory in non-musicians. Anodal or sham transcranial direct current stimulation (tDCS) was applied over the left SMG (Experiment 1) and right SMG (Experiment 2) in two different sessions. In each session participants completed a pitch and rhythm recognition memory task immediately after tDCS. A significant facilitation of pitch memory was revealed when anodal stimulation was applied over the left SMG. No significant effects on pitch memory were found for anodal tDCS over the right SMG or sham condition. For rhythm memory the opposite pattern was found; anodal tDCS over the right SMG led to an improvement in performance, but anodal tDCS over the left SMG had no significant effect. These results highlight a different hemispheric involvement of the SMG in auditory memory processing depending on auditory material that is encoded.

Original languageEnglish
Article number42456
JournalScientific Reports
Volume7
DOIs
Publication statusPublished - 15 Feb 2017

Bibliographical note

Funding Information:
Michael J. Banissy is supported by the ESRC [ES/K00882X/1] and European Commission [CREAM project under Grant Agreement no. 612022].

Publisher Copyright:
© 2017 The Author(s).

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