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Functioning of medial olivocochlear bundle in right- and left-handed individuals
Ramesh Kaipa1,2, U Ajith Kumar1,3
1a Dr. M.V. Shetty College of Speech and Hearing , University of Mangalore , Mangalore , India.
Laterality
|October 1, 2016
Summary
This study found no functional asymmetry in the medial olivocochlear bundle (MOCB) for either right- or left-handed individuals, suggesting consistent auditory pathway function regardless of handedness.
Area of Science:
- Auditory Neuroscience
- Human Auditory System
- Neuroscience
Background:
- The functional symmetry of the medial olivocochlear bundle (MOCB) in relation to handedness is not well understood.
- Investigating MOCB symmetry can provide insights into auditory pathway organization.
Purpose of the Study:
- To assess the functional symmetry of the MOCB by measuring contralateral inhibition of otoacoustic emissions (OAEs).
- To compare MOCB function between right-handed and left-handed individuals.
Main Methods:
- Participants included 13 left-handed and 13 right-handed individuals (ages 19-25).
- Behavioral tests included speech perception in noise and vocal reaction time.
- Physiological measures involved recording contralateral inhibition of OAEs in both ears.
Main Results:
- No significant functional asymmetry of the MOCB was observed in either right-handed or left-handed participants.
- Contralateral inhibition of OAEs showed similar patterns across both handedness groups.
Conclusions:
- The medial olivocochlear bundle (MOCB) does not exhibit functional asymmetry based on handedness.
- Findings suggest handedness-independent functional symmetry within the descending auditory pathways.
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