Control of Biosonar Behavior by the Auditory Cortex
Final rept. Jul 1987-Oct 1990
WASHINGTON UNIV ST LOUIS MO
Pagination or Media Count:
The major aim of this project was to examine, by means of critical lesion experiments, whether the functional organization of the mustached bats, Pteronotus parnellii, auditory cortex is related to biosonar behavior in the manner inferred from pervious neurophysiological experiments. First, we quantitatively analyzed the behavioral adjustments the bat makes in the frequency, intensity, duration, and rate of emission of its biosonar pulses during target-directed flight. Next, we examined changes in these behavioral adjustments following bilateral ablation of either the entire auditory cortex, or more localized cortical regions. We then focused on the role of the auditory cortex in the perception of biosonar signals. This was accomplished by conditioning the bats to discriminate between biosonar signals that varied along some stimulus parameter e.g., echo delay using a leg flexion shock avoidance procedure. We then created of the auditory cortex. Major results of each of these lines of research are described in this report.
- Anatomy and Physiology
- Acoustic Detection and Detectors