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Updated: Aug 5, 2026
06:34
Infant Auditory Processing and Event-related Brain Oscillations
Published on: July 1, 2015
Gamma band activity in an auditory oddball paradigm studied with the wavelet transform
I G Gurtubay1, M Alegre, A Labarga
1Clinical Neurophysiology Unit, Department of Neurology, Clínica Universitaria, Facultad de Medicina, Universidad de Navarra, Pamplona, Spain.
Summary
This study reveals distinct gamma band oscillations during P300 development in an auditory oddball task. Early gamma responses occur for all stimuli, while later responses are linked to target detection and the P300 wave.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Signal Processing
Background:
- The P300 wave is a significant event-related potential in cognitive neuroscience.
- Gamma band oscillations are implicated in various cognitive processes.
Purpose of the Study:
- To characterize gamma band oscillatory responses during P300 development.
- To differentiate evoked and induced gamma activity in an auditory oddball paradigm.
Main Methods:
- Applied time-frequency analysis using wavelet and Gabor transforms.
- Analyzed phase-locked (evoked) and non-phase-locked (induced) activity.
- Utilized an auditory oddball paradigm with 7 healthy participants.
Main Results:
- Identified an early gamma response (approx. 44 Hz) around 26-28 ms for both standard and target stimuli.
- Observed a late gamma response (approx. 37 Hz) around 360 ms exclusively for target stimuli.
- Found a strong correlation between the latency of the late gamma response and the P300 wave latency.
Conclusions:
- Wavelet transform analysis effectively identifies early gamma band oscillations.
- A late, P300-related gamma response is associated with target stimulus processing.
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