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Acta Biomedica Scientia

Volume 11, Issue 2, 2024
Mcmed International
Acta Biomedica Scientia
Issn
2348 - 215X (Print), 2348 - 2168 (Online)
Frequency
bi-annual
Email
editorabs@mcmed.us
Journal Home page
http://mcmed.us/journal/abs
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Abstract
Title
INVESTIGATING THE CORTICAL RESPONSE TO TYMPANIC MEMBRANE STIMULATION VIA FMRI
Author
Dr. Jakkala, Suresh Babu
Email
keyword
Somatosensory, Middle ear, Tympanic membrane, Auditory cortex, fMRI
Abstract
This study aimed to investigate the somatosensory representations of the middle ear within the human cortex. Thirty subjects with normal hearing participated in a 3T-fMRI experiment, during which minor changes in tympanic membrane pressure were induced. Activation of the audiological association area 22 was observed bilaterally in response to stimulation of the postcentral gyrus (area 40) and Brodmann area 43. Additionally, Brodmann area 43 was activated during oropharyngeal pressure activities associated with oral intake, a process facilitated by the Eustachian tubes that connect the tympanic membranes to the pharynx. Notably, both BA 42 and BA 22 showed bilateral activation during changes in oropharyngeal air pressure, indicating cortical involvement in the acoustic reflex. These findings underscore the participation of cortical regions (areas 43, 42, and 22) in processing somatosensory information related to middle ear function, especially in response to pressure-induced movements of the tympanic membrane
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