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Auditory Pathway

Auditory Pathway

Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...

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Related Experiment Video

Updated: Jan 2, 2026

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example

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Published on: October 24, 2012

Causal links between parietal alpha activity and spatial auditory attention.

Yuqi Deng¹, Robert Mg Reinhart², Inyong Choi³

¹Biomedical Engineering, Boston University, Boston, United States.

|November 30, 2019

Summary

Alpha brain stimulation causally impacts auditory spatial attention. Specifically, right parietal alpha stimulation disrupted left auditory space attention, demonstrating a frequency- and hemisphere-specific effect on auditory spatial control.

Keywords:

brain networks brain stimulation human neuroscience selective auditory attention transcranial alternating current stimulation

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Last Updated: Jan 2, 2026

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example

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Area of Science:

Neuroscience
Cognitive Neuroscience
Auditory Neuroscience

Background:

Spatial selective attention, both visual and auditory, involves lateralized alpha (8-14 Hz) oscillatory power in the parietal cortex.
Previous studies suggest parietal alpha influences visual spatial attention but its role in auditory spatial attention remains unproven.

Purpose of the Study:

To investigate the causal role of parietal alpha oscillations in auditory spatial selective attention.
To determine if transcranial alternating current stimulation (tACS) of the parietal cortex can modulate auditory spatial attention.

Main Methods:

High-definition transcranial alternating current stimulation (HD-tACS) was applied to the right parietal cortex of human subjects.
Subjects performed an auditory task requiring spatial or nonspatial attention.
Alpha (10 Hz) and theta (6 Hz) stimulation frequencies were tested.

Main Results:

Alpha (10 Hz) HD-tACS of the right parietal cortex impaired performance on attending to left auditory space but not right auditory space.
Theta (6 Hz) stimulation or nonspatial attention tasks showed no significant effects.
Performance returned to baseline levels rapidly after stimulation cessation.

Conclusions:

Parietal alpha brain stimulation causally affects top-down control of auditory spatial attention.
The effect is specific to alpha frequency, the right parietal cortex, and spatial auditory attention, highlighting hemispheric and task specificity.