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Related Experiment Video

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Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain

Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain

Published on: October 11, 2017

The auditory cortex network in the posterior superior temporal area.

Yuto Suzuki¹, Rei Enatsu¹, Aya Kanno¹

¹Department of Neurosurgery, Sapporo Medical University, Sapporo, Japan.

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology

|August 16, 2018

Summary

Investigating auditory cortices in the posterior lateral superior temporal area (PLST) reveals distinct functions for right and left hemispheres. These areas connect to major white matter tracts, including the middle longitudinal fasciculus (MLF), suggesting roles in auditory processing.

Keywords:

Auditory processing Diffusion tensor imaging Electric cortical stimulation Secondary auditory area

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Area of Science:

Neuroscience
Auditory Neuroscience
Neuroimaging

Background:

The posterior lateral superior temporal area (PLST) is crucial for auditory processing.
Understanding the functional networks of the PLST is essential for comprehending auditory perception and its disorders.

Purpose of the Study:

To investigate the functional roles and connectivity of the auditory cortices within the PLST.
To identify the white matter tracts associated with the PLST auditory cortices using advanced neuroimaging techniques.

Main Methods:

Utilized electrical cortical stimulation in seven epilepsy patients to precisely identify PLST auditory cortices.
Employed diffusion tensor imaging (DTI) to map subcortical fiber tracts originating from the stimulated PLST regions.

Main Results:

Electrical stimulation of the right PLST induced hearing impairment, while left-side stimulation caused auditory illusions.
DTI identified the middle longitudinal fasciculus (MLF), superior longitudinal fasciculus (SLF), and inferior fronto-occipital fasciculus (IFOF) originating from the PLST.

Conclusions:

The study indicates lateralized functional differences between the right and left PLST auditory cortices.
The identified white matter tracts (MLF, SLF, IFOF) are likely involved in auditory processing networks originating from the PLST.