Article date: 1991/2/1
PubMed ID: 1990432
Journal name: Science (New York, N.Y.) (ISSN: 0036-8075)
Mustached bats orient and find insects by emitting ultrasonic pulses and analyzing the returning echoes. Neurons in the Doppler-shifted constant-frequency (DSCF) and frequency-modulated (FM-FM) areas of the auditory cortex form maps of echo frequency (target velocity) and echo delay (target range), respectively. Bats were trained to discriminate changes in echo frequency or delay, and then these areas were selectively inactivated with muscimol. Inactivation of the DSCF area disrupted frequency but not delay discriminations; inactivation of the FM-FM area disrupted delay but not frequency discriminations. Thus, focal inactivation of specific cortical maps produces specific disruptions in the perception of biosonar signals.
Author List: Riquimaroux H, Gaioni S J, Suga N
Publication Types: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.
Substances mentioned in the article:
Mesh terms: Animals; Auditory Cortex/anatomy & histology; Auditory Perception; Chiroptera; Discrimination (Psychology); Neurons/cytology; Time Factors;