PMID: 8965261Jan 1, 1996Paper

Spatial tuning of neurons in the inferior colliculus of the big brown bat: effects of sound level, stimulus type and multiple sound sources

Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology
B GrotheJ H Casseday

Abstract

We examined factors that affect spatial receptive fields of single units in the central nucleus of the inferior colliculus of Eptesicus fuscus. Pure tones, frequency- or amplitude-modulated sounds, or noise bursts were presented in the free-field, and responses were recorded extracellularly. For 58 neurons that were tested over a 30 dB range of sound levels, 7 (12%) exhibited a change of less than 10 degrees in the center point and medical border of their receptive field. For 28 neurons that were tested with more than one stimulus type, 5 (18%) exhibited a change of less than 10 degrees in the center point and medial border of their receptive field. The azimuthal response ranges of 19 neurons were measured in the presence of a continuous broadband noise presented from a second loudspeaker set at different fixed azimuthal positions. For 3 neurons driven by a contralateral stimulus only, the effect of the noise was simple masking. For 11 neurons driven by sound at either side, 8 were unaffected by the noise and 1 showed a simple masking effect. For the remaining 2, as well as for 5 neurons that were excited by contralateral sound and inhibited by ipsilateral sound, the peak of the azimuthal response range shifted toward the direc...Continue Reading

Citations

Apr 1, 1999·Annual Review of Physiology·E Covey, J H Casseday
Apr 6, 2012·PloS One·David Pérez-GonzálezManuel S Malmierca
Oct 12, 2005·Neuroscience·C V Portfors, R A Felix
Jul 29, 2010·Physiological Reviews·Benedikt GrotheDavid McAlpine
Sep 7, 2007·Journal of Neurophysiology·Xiaoming Zhou, Philip H-S Jen
Apr 2, 2004·Journal of Neurophysiology·Thomas J ParkBenedikt Grothe
Apr 12, 2000·Journal of Neurophysiology·U Koch, B Grothe

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