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J Neurophysiol 86: 1043-1046, 2001;
0022-3077/01 $5.00
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The Journal of Neurophysiology Vol. 86 No. 2 August 2001, pp. 1043-1046
Copyright ©2001 by the American Physiological Society

RAPID COMMUNICATION

Listening Through Different Ears Alters Spatial Response Fields in Ferret Primary Auditory Cortex

Thomas D. Mrsic-Flogel,1 Andrew J. King,1 Rick L. Jenison,2 and Jan W. H. Schnupp1

 1University Laboratory of Physiology, Oxford OX1 3PT, United Kingdom; and  2Department of Psychology, University of Wisconsin, Madison, Wisconsin 53706

Mrsic-Flogel, Thomas D., Andrew J. King, Rick L. Jenison, and Jan W. H. Schnupp. Listening Through Different Ears Alters Spatial Response Fields in Ferret Primary Auditory Cortex. J. Neurophysiol. 86: 1043-1046, 2001. The localization of sounds in space is based on spatial cues that arise from the acoustical properties of the head and external ears. Individual differences in localization cue values result from variability in the shape and dimensions of these structures. We have mapped spatial response fields of high-frequency neurons in ferret primary auditory cortex using virtual sound sources based either on the animal's own ears or on the ears of other subjects. For 73% of units, the response fields measured using the animals' own ears differed significantly in shape and/or position from those obtained using spatial cues from another ferret. The observed changes correlated with individual differences in the acoustics. These data are consistent with previous reports showing that humans localize less accurately when listening to virtual sounds from other individuals. Together these findings support the notion that neural mechanisms underlying auditory space perception are calibrated by experience to the properties of the individual.




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