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An FMRI-study on Single-sided Deafness: Spectral-temporal Properties and Side of Stimulation Modulates Hemispheric Dominance

Overview
Journal Neuroimage Clin
Publisher Elsevier
Specialties Neurology
Radiology
Date 2019 Aug 17
PMID 31419767
Citations 6
Authors
Affiliations
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Abstract

Objective: Our main aim was to investigate the blood oxygenation level dependent (BOLD) response to monaural and binaural speech- and non-speech stimuli as measured with fMRI in subjects with single-sided deafness and in normal hearing controls. We hypothesised that the response to monaural stimulation in both normal hearing subjects and persons with single-sided deafness would vary with the complexity and nature of the stimuli and the side of stimulation.

Design: Patients with left- and right single-sided deafness and controls with normal hearing receiving either binaural or monaural stimuli were tested using speech and non-speech auditory stimuli in an event-related fMRI experiment.

Study Sample: Twenty-two patients with single-sided deafness after treatment for vestibular schwannoma and 50 normal hearing controls.

Results: Normal hearing persons receiving right side monaural stimuli activate bilateral temporal regions. Activation following left side monaural stimulation is more right lateralized. Persons with single-sided deafness respond similarly to controls to monaural stimulation. Persons with right side single-sided deafness show activation of frontal cortical regions not seen in persons with left side single-sided deafness following speech stimuli. This is possibly related to increased effort and more frequently reported problems with communication. Right side single-sided deafness is related to increased activation of areas usually related to processing of degraded input, including the thalamus.

Conclusion: Hemispheric dominance following monaural auditory stimulation is modulated by the spectral-temporal properties of the stimuli and by which ear is stimulated. Differences between patients with right- and left side deafness suggests that right side deafness is related to increased activation of areas involved in processing of degraded input.

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The effect of noise on the cortical activity patterns of speech processing in adults with single-sided deafness.

Han J, Lee J, Lee H Front Neurol. 2023; 14:1054105.

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Altered topological properties of the intrinsic functional brain network in patients with right-sided unilateral hearing loss caused by acoustic neuroma.

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Understanding degraded speech leads to perceptual gating of a brainstem reflex in human listeners.

Hernandez-Perez H, Mikiel-Hunter J, McAlpine D, Dhar S, Boothalingam S, Monaghan J PLoS Biol. 2021; 19(10):e3001439.

PMID: 34669696 PMC: 8559948. DOI: 10.1371/journal.pbio.3001439.


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