Reset of Low-Frequency Oscillations in Auditory Integration Areas During Audiovisual Speech
Abstract number :
2.345
Submission category :
11. Behavior/Neuropsychology/Language / 11A. Adult
Year :
2023
Submission ID :
847
Source :
www.aesnet.org
Presentation date :
12/3/2023 12:00:00 AM
Published date :
Authors :
Presenting Author: LILIANA CAMARILLO RODRIGUEZ, MD, PhD – University of Texas Medical Branch
PATRICK KARAS, MD, PhD – Assistant Professor, Neurosurgery, UNIVERSITY OF TEXAS MEDICAL BRANCH
Rationale:
Previous research suggests that integrating auditory and visual information can improve speech comprehension when auditory information is limited. However, how this is accomplished remains an active area of study. We aim to investigate whether audiovisual and auditory speech resets the phase of neuronal oscillations in the superior temporal gyrus (STG) and supramarginal gyrus (SMG).
Methods:
We analyzed neural responses from eight participants recorded via implanted electrodes in the STG and SMG. We compared the intertrial phase coherence (ITPC) of neural responses from 2-4 Hz during the presentation of mouth-leading and voice-leading words shown during auditory and audiovisual formats.
Results:
Our findings reveal lateralized ITPC strength differences. Left-sided regions showed higher ITPCs for audiovisual words, while right-sided areas showed higher ITPCs for auditory-only words. In addition, left-sided electrodes exhibited a shorter latency to the maximum peak of ITPC than right-sided electrodes.
Conclusions:
The findings of this study provide evidence for a potential lateralization in the processing and integration of audiovisual information in the brain.
Funding: Funding by the ASSFN
Behavior