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Hofman, P. M., Van Riswick, J. G. A., & Van Opstal, A. J. (1998). Relearning sound localization with new ears. Nature Neuroscience, 1(5), 417–421.
Added by: sirfragalot (02/02/2014 11:43:12 AM)
|Resource type: Journal Article
BibTeX citation key: Hofman1998
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Keywords: Localization, Location of sound, Neuralplasticity, Psychoacoustics, Psychology
Creators: Hofman, Van Opstal, Van Riswick
Collection: Nature Neuroscience
Because the inner ear is not organized spatially, sound localization relies on the neural processing of implicit acoustic cues. To determine a sound’s position, the brain must learn and calibrate these cues, using accurate spatial feedback from other sensorimotor systems. Experimental evidence for such a system has been demonstrated in barn owls, but not in humans. Here, we demonstrate the existence of ongoing spatial calibration in the adult human auditory system. The spectral elevation cues of human subjects were disrupted by modifying their outer ears (pinnae) with molds. Although localization of sound elevation was dramatically degraded immediately after the modification, accurate performance was steadily reacquired. Interestingly, learning the new spectral cues did not interfere with the neural representation of the original cues, as subjects could localize sounds with both normal and modified pinnae.
Temporary acquisition of new pinna spectral transfer functions related to elevation localization when humans had pinnae distorted with molds.
Authors make the claim that visual spatial feedback aids (and may be most important) in relearning elevation localization (e.g. ventriloquism effect) but this contrasts with the results of experiments in ferrets (Kacelnik, O., Nodal, F. R., Parsons, K. H., & King, A. J. (2006)).
Added by: sirfragalot Last edited by: sirfragalot
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