Abnormal cortical sensorimotor activity during “Target” sound detection in subjects with acute acoustic trauma sequelae: an fMRI study

The most common consequences of acute acoustic trauma (AAT) are hearing loss at frequencies above 3 kHz and tinnitus. In this study, we have used functional Magnetic Resonance Imaging (fMRI) to visualize neuronal activation patterns in military adults with AAT and various tinnitus sequelae during an...

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Bibliographic Details
Published in:Brain and behavior 2012-03, Vol.2 (2), p.187-199
Main Authors: Job, Agnès, Pons, Yoann, Lamalle, Laurent, Jaillard, Assia, Buck, Karl, Segebarth, Christoph, Delon‐Martin, Chantal
Format: Article
Language:English
Subjects:
Acoustic trauma
Acoustics
Ears & hearing
fMRI
Hearing loss
Middle ear
Noise
Original Research
Perceptions
Proprioception
Questionnaires
Sound
Tinnitus
Variance analysis
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Summary:The most common consequences of acute acoustic trauma (AAT) are hearing loss at frequencies above 3 kHz and tinnitus. In this study, we have used functional Magnetic Resonance Imaging (fMRI) to visualize neuronal activation patterns in military adults with AAT and various tinnitus sequelae during an auditory “oddball” attention task. AAT subjects displayed overactivities principally during reflex of target sound detection, in sensorimotor areas and in emotion‐related areas such as the insula, anterior cingulate and prefrontal cortex, in premotor area, in cross‐modal sensory associative areas, and, interestingly, in a region of the Rolandic operculum that has recently been shown to be involved in tympanic movements due to air pressure. We propose further investigations of this brain area and fine middle ear investigations, because our results might suggest a model in which AAT tinnitus may arise as a proprioceptive illusion caused by abnormal excitability of middle‐ear muscle spindles possibly link with the acoustic reflex and associated with emotional and sensorimotor disturbances. We have used fMRI to visualize neuronal activation patterns in military adults with AAT and various tinnitus sequelae during an auditory “oddball” attention task. our results might suggest a model in which AAT tinnitus may arise as a proprioceptive illusion caused by abnormal excitability of middle ear muscle spindles possibly linked with the acoustic reflex and associated with emotional and sensorimotor disturbances.
ISSN:2162-3279
2162-3279
DOI:10.1002/brb3.21