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Updated: Jun 6, 2026
10:09
Mapping the After-effects of Theta Burst Stimulation on the Human Auditory Cortex with Functional Imaging
Published on: September 12, 2012
Stochastic resonance in connectivity between both auditory areas obtained by auditory stimuli
K Tanaka1, I Nemoto, M Kawakatsu
1Department of Science and Engineering, Tokyo Denki University, Saitama, JAPAN. ktanaka@mail.dendai.ac.jp
Summary
This study found that white noise enhances auditory steady-state responses (ASSRs) in the brain. This stochastic resonance effect, observed in the temporal regions, may reveal new insights into biological system mechanisms.
Area of Science:
- Neuroscience
- Auditory Neuroscience
- Biophysics
Background:
- Auditory steady-state responses (ASSRs) are crucial for understanding auditory processing.
- Stochastic resonance (SR) describes how noise can enhance signal detection in non-linear systems.
- The precise mechanisms of SR in biological systems, particularly the central nervous system, remain largely unknown.
Purpose of the Study:
- To investigate the effect of contralateral white noise on the coherence of auditory steady-state responses (ASSRs).
- To explore the potential role of stochastic resonance in auditory processing within the central nervous system.
Main Methods:
- Magnetoencephalography (MEG) was used to record ASSRs.
- Subjects listened to a modulated tone in the left ear while receiving white noise bursts of varying intensities in the right ear.
- Coherence analysis focused on the real part of ASSRs in the temporal regions.
Main Results:
- A significant enhancement in the real part of ASSR coherence was observed with the addition of appropriately intense white noise.
- This enhancement suggests a stochastic resonance phenomenon.
- The effect was detected in both right and left temporal regions.
Conclusions:
- The findings suggest that stochastic resonance plays a role in auditory processing within the central auditory pathway.
- The observed SR likely occurs between the lateral superior olive and the medial geniculate body.
- This research provides important evidence for SR mechanisms in biological systems.
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