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Acta Biomedica Scientia

Volume 6, Issue 3, 2019
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
INVESTIGATION OF MIDDLE EAR SOMATOSENSORY REPRESENTATIONS IN THE HUMAN CORTEX: INSIGHTS FROM FUNCTIONAL MRI
Author
Dr. Manish Mehta, Dr. Amin Manoj Kumar Govind Bhai
Email
Dr. Amin Manoj Kumar Govind Bhai@gmail.com
keyword
Somatosensory, Middle ear, Tympanic membrane, Auditory cortex, fMRI, Cortical activation
Abstract
This study aimed to explore the somatosensory representations of the middle ear within the human cortex. 15 subjects with normal hearing underwent a 3T-fMRI experiment, during which a minor change in tympanic membrane pressure was induced. Activation of the audiological association area 22 was observed bilaterally upon stimulation of the postcentral gyrus 40 and Brodmann area 43. Additionally, Brodmann area 43 exhibited activation in response to oropharyngeal pressure activities associated with oral intake, a process facilitated by the Eustachian tubes linking the tympanic membranes to the pharynx. Notably, BA 42 and BA 22 were activated bilaterally during changes in oropharyngeal air pressure, indicative of the cortical involvement in the acoustic reflex. These findings highlight the involvement of cortical regions (areas 43, 42, and 22) in processing somatosensory information related to middle ear function, particularly in response to pressure-induced movements of the tympanic membrane.
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