Compelling evidence exists that the adult brain can be modified by sensory experiences. Understanding experience-dependent plasticity has implications for clinical remediation strategies in neurological and auditory disorders. In this proposal, I will use a well-established and powerful plasticity paradigm to study how sensory experience alters receptive field size, maximum following rate, and fidelity of cortical representations, from neurons in the primary auditory cortex. To accomplish these objectives, I will pair tones, rapidly modulated trains of noise bursts, and complex speech stimuli with activation of the cholinergic nucleus basalis, located in the basal forebrain, and examine how sensory input guides cortical plasticity. After sensory experience with each of these three classes of stimuli, I will then collect dense cortical maps and determine how these sounds contribute to different forms of plasticity in each group. The experiments in this proposal will extend our knowledge of basic principles of auditory cortical plasticity to include complex spatiotemporal stimuli. It is my hypothesis that differential sensory experience will shape cortical representations in a systematic and quantifiable manner.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Predoctoral Individual National Research Service Award (F31)
Project #
5F31DC005285-03
Application #
6612956
Study Section
Communication Disorders Review Committee (CDRC)
Program Officer
Sklare, Dan
Project Start
2002-08-01
Project End
Budget Start
2003-08-01
Budget End
2004-07-31
Support Year
3
Fiscal Year
2003
Total Cost
$27,488
Indirect Cost
Name
University of Texas-Dallas
Department
Neurosciences
Type
Other Domestic Higher Education
DUNS #
800188161
City
Richardson
State
TX
Country
United States
Zip Code
75080
Pandya, Pritesh K; Rathbun, Daniel L; Moucha, Raluca et al. (2008) Spectral and temporal processing in rat posterior auditory cortex. Cereb Cortex 18:301-14
Pandya, Pritesh K; Moucha, Raluca; Engineer, Navzer D et al. (2005) Asynchronous inputs alter excitability, spike timing, and topography in primary auditory cortex. Hear Res 203:10-20