Khalfa S, Veuillet E, Collet L
CNRS UPRESA 5020, Perception et Mécanismes Auditifs, Pavillon U, Hôpital Edouard Herriot, 3, Place d'Arsonval, 69003 Lyon, France.
Eur J Neurosci. 1998 Aug;10(8):2731-7. doi: 10.1046/j.1460-9568.1998.00286.x.
It is well established that in humans many differences between right- and left-handers, anatomical, physiological and functional, exist. Left- and mixed-handedness is associated with greater bihemispheric representation of cognitive functions than in right-handers. Several studies indicate a left-right asymmetry in the function of hearing pathways between cochlea and auditory cortex, and furthermore, that this asymmetry is associated with handedness. Our investigation focuses on the medial olivo-cochlear system, which has been demonstrated to be more effective in the right than left ear in right-handers. The aim of the study was to investigate this auditory efferent system asymmetry according to handedness, gender, eyedness, footedness and the presence of spontaneous otoacoustic emissions. The medial efferent system has been found to be more effective in the right than left ear in right-handers, while functioning symmetrically in left-handers. Furthermore, the olivo-cochlear system, assumed to be involved in basic language processing, shows an asymmetrical pattern of functioning influenced by handedness as well as by hemispheric language representation. Reverse medial efferent system asymmetry was observed in left-handers compared to that in right-handers, on condition that only left-handed males were considered, or that the left-handers were also left-eyed, or that spontaneous otoacoustic emissions were present in the left ear of the left-handers, or when only left-handers without mixed-handers were considered.
众所周知，在人类中，右利手和左利手（及混合利手）之间存在许多解剖学、生理学和功能上的差异。与右利手相比，左利手和混合利手在认知功能上与双侧大脑半球的关联性更强。多项研究表明，在耳蜗和听觉皮层之间的听觉通路功能上存在左右不对称性，而且这种不对称性与利手有关。我们的研究聚焦于内侧橄榄耳蜗系统，该系统在右利手中已被证明在右耳比左耳更有效。本研究的目的是根据利手、性别、眼优势、足优势以及自发性耳声发射的情况来研究这种听觉传出系统的不对称性。已发现内侧传出系统在右利手中右耳比左耳更有效，而在左利手中功能对称。此外，假定参与基本语言处理的橄榄耳蜗系统显示出一种受利手以及半球语言表征影响的不对称功能模式。在左利手中观察到与右利手相反的内侧传出系统不对称性，条件是仅考虑左利手男性，或者左利手同时也是左眼优势，或者左利手的左耳存在自发性耳声发射，或者仅考虑非混合利手的左利手。
