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How does musical rhythm influence grammatical processing at the neurophysiological level?

Maksim Markevich¹, Anna Rebreikina^1,2, Tatiana Logvinenko³

¹Center for Cognitive Sciences, Sirius University of Science and Technology, Sirius, Krasnodar Region, Russia.

|August 21, 2024

Summary

Irregular rhythms disrupt grammatical processing, increasing cognitive load and working memory strain in adolescents during visual tasks. This rhythmic priming effect (RPE) highlights how auditory disruptions impact language comprehension.

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fMRI Mapping of Brain Activity Associated with the Vocal Production of Consonant and Dissonant Intervals

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Area of Science:

Neuroscience
Cognitive Psychology
Linguistics

Background:

Behavioral studies show rhythmic priming effect (RPE) in grammatical processing via grammaticality judgment tasks (GJT).
Neurophysiological RPE studies are scarce, limited to auditory GJTs, specific languages, and often lack baseline conditions.

Purpose of the Study:

Investigate neurophysiological correlates of RPE in visual GJT.
Examine RPE in Russian-speaking adolescents using a visual GJT.

Main Methods:

Recorded 128-channel electroencephalogram (EEG) during a self-paced visual GJT.
Participants were exposed to regular rhythms, irregular rhythms, or silence before blocks.

Main Results:

A late negativity (N600 component) was larger for ungrammatical vs. grammatical sentences after irregular rhythmic sequences.
This suggests increased cognitive complexity and processing load.

Conclusions:

Irregular rhythmic stimulation increases cognitive demand during visual GJT.
Concurrent task execution and rhythmic disruption strain working memory resources.