.) The proposed studies will use a combined dichotic and free-field stimulation method to examine binaural response properties of single neurons, and determine how these response properties shape their sound location selectivity. Recording sites will be marked to determine if these neurons are anatomically organized with respect to binaural properties or spatial tuning. Radial penetrations through cortical columns will determine the homogeneity of response properties in a single column. The cortical surface will be mapped in two dimensions to determine whether aural types are anatomically segregated, and whether within each aural segregation there exists a finer level of functional organization. Results will be compared with similar studies of the inferior colliculus to study the transformation of response properties and functional organization from the midbrain to cortical level. Functional subdivisions of the cortical 60 kHz region will be injected with retrograde tracers to determine the specificity of connections with cortical and subcortical structures.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
First Independent Research Support & Transition (FIRST) Awards (R29)
Project #
5R29DC000054-05
Application #
2124304
Study Section
Hearing Research Study Section (HAR)
Project Start
1990-04-01
Project End
1996-03-31
Budget Start
1994-04-01
Budget End
1996-03-31
Support Year
5
Fiscal Year
1994
Total Cost
Indirect Cost
Name
University of Wyoming
Department
Zoology
Type
Schools of Arts and Sciences
DUNS #
069690956
City
Laramie
State
WY
Country
United States
Zip Code
82071
Fuzessery, Z M; Buttenhoff, P; Andrews, B et al. (1993) Passive sound localization of prey by the pallid bat (Antrozous p. pallidus). J Comp Physiol A 171:767-77