Related Experiment Video
Updated: Jan 5, 2026
08:45
Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
Published on: October 24, 2012
15.1K
Auditory deviance detection in the human insula: An intracranial EEG study.
Alejandro O Blenkmann1, Santiago Collavini2, James Lubell1
1Department of Psychology, University of Oslo, Norway.
Summary
The human insula detects auditory deviance using high frequency activity (HFA). This brain region processes unexpected sounds, showing specific responses in the inferior insula, contributing to auditory deviance detection.
Area of Science:
- Neuroscience
- Auditory Neuroscience
- Electrophysiology
Background:
- The human insula's role in auditory processing is not fully understood.
- Electrophysiological evidence for insular function in auditory deviance detection is limited.
Purpose of the Study:
- To investigate the insula's role in automatic auditory deviance detection.
- To analyze high frequency activity (HFA) and event-related potentials (ERPs) within the insula during auditory processing.
Main Methods:
- Analysis of intracranial EEG data from 90 insular channels in 16 epilepsy patients.
- Passive listening to standard and deviant tones varying in intensity, frequency, location, or time.
- Examination of high frequency activity (75-145 Hz) and ERPs.
Main Results:
- High frequency activity (HFA) responses to auditory stimuli were observed in multiple insular regions.
- A subset of channels in the inferior circular sulcus of the insula exhibited HFA deviance detection responses.
- Auditory deviancy processing in the insula occurred later compared to the superior temporal cortex.
Conclusions:
- The human insula is actively engaged in auditory deviance detection.
- Specific insular regions, particularly the inferior circular sulcus, contribute to processing unexpected auditory stimuli.
- Electrophysiological findings support the insula's involvement in automatic auditory deviance detection.
