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Evidence for Corticofugal Modulation of Peripheral Auditory Activity in Humans
- Source :
- Cerebral Cortex. 16:941-948
- Publication Year :
- 2005
- Publisher :
- Oxford University Press (OUP), 2005.
-
Abstract
- Active cochlear micromechanisms, involved in auditory sensitivity, are modulated by the medial olivocochlear efferent system, which projects directly onto the organ of Corti. Both processes can be assessed non-invasively by means of evoked otoacoustic emissions. Animal experiments have revealed top-down control from the auditory cortex to peripheral auditory receptor, supported by anatomical descriptions of descending auditory pathways from auditory areas to the medial olivocochlear efferent system and organ of Corti. Through recording of evoked otoacoustic emissions during presurgical functional brain mapping for refractory epilepsy, we showed that corticofugal modulation of peripheral auditory activity also exists in humans. In 10 epileptic patients, electrical stimulation of the contralateral auditory cortex led to a significant decrease in evoked otoacoustic emission amplitude, whereas no change occurred under stimulation of non-auditory contralateral areas. These findings provide evidence of a cortico-olivocochlear pathway, originating in the auditory cortex and modulating contralateral active cochlear micromechanisms via the medial olivocochlear efferent system, in humans.
- Subjects :
- Adult
Male
medicine.medical_specialty
Cognitive Neuroscience
Otoacoustic Emissions, Spontaneous
Auditory area
Otoacoustic emission
Action Potentials
Stimulation
Olivary Nucleus
Audiology
Auditory cortex
Brain mapping
Cellular and Molecular Neuroscience
Epilepsy
Neural Pathways
otorhinolaryngologic diseases
medicine
Humans
Auditory Cortex
Evidence-Based Medicine
Neuronal Plasticity
business.industry
medicine.disease
Adaptation, Physiological
Electric Stimulation
Peripheral
medicine.anatomical_structure
Organ of Corti
Evoked Potentials, Auditory
Female
sense organs
business
Neuroscience
Subjects
Details
- ISSN :
- 14602199 and 10473211
- Volume :
- 16
- Database :
- OpenAIRE
- Journal :
- Cerebral Cortex
- Accession number :
- edsair.doi.dedup.....57e5cb71972bb2f2a872a6c9927d58f0