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Infant Auditory Processing and Event-related Brain Oscillations
Published on: July 1, 2015
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Neural oscillations in human auditory cortex revealed by fast fMRI during auditory perception
Sascha Frühholz1, Wiebke Trost2, Didier Grandjean3
1Department of Psychology, University of Zurich, Zurich, 8050, Switzerland; Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, 8057, Switzerland; Center for Integrative Human Physiology (ZIHP), University of Zurich, 8057, Switzerland.
Neuroimage
|November 30, 2019
Summary
Fast functional magnetic resonance imaging (fMRI) reveals unique infraslow brain oscillations in the auditory cortex responding to human voices. These findings highlight the brain
Area of Science:
- Neuroscience
- Auditory Neuroscience
- Cognitive Neuroscience
Background:
- Infraslow neural oscillations (<1 Hz) are significant for brain dynamics.
- Fast functional MRI (fMRI) enables precise detection of these oscillations.
- Previous research focused on low-level sensory input.
Purpose of the Study:
- To investigate infraslow oscillatory blood oxygenation level-dependent (BOLD) responses to auditory voice stimulation.
- To determine if the voice-sensitive auditory cortex (AC) prioritizes vocal signals via infraslow oscillations.
- To provide the first evidence for infraslow BOLD responses in voice processing.
Main Methods:
- Utilized fast functional magnetic resonance imaging (fMRI).
- Analyzed infraslow oscillatory BOLD responses in the human auditory cortex.
- Compared responses to vocal signals versus other auditory stimuli (implied).
Main Results:
- Identified unique sustained and transient infraslow BOLD oscillatory patterns for vocal signals in the AC.
- Vocal signals elicited faster peak oscillatory responses across AC regions.
- Discovered an exclusive sustained oscillatory component for vocal signals in the primary AC.
Conclusions:
- Fast fMRI demonstrates the functional significance of infraslow BOLD oscillations in voice processing.
- The voice-sensitive AC prioritizes vocal signals through distinct infraslow oscillatory patterns.
- Infraslow oscillations are crucial for neurocognitive mechanisms in social cognition, particularly voice perception.
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