Adaptive information processing in auditory cortex. Annual report, 1 June 1987-31 May 1988

Technical Report · Tue May 31 00:00:00 EDT 1988

OSTI ID:6138743

Weinberger, N M

The fact that learning induces frequency-specific modification of receptive fields in auditory cortex implies that the functional organization of auditory (and perhaps other sensory) cortex comprises an adaptively-constituted information base. This project initiates the first systematic investigation of adaptive information processing in cerebral cortex. A major goal is to determine the circumstances under which adaptive information processing is induced by experience. This project also addresses central hypotheses about rules that govern adaptive information processing, at three levels of spatial scale: (a) parallel processing in different auditory fields: (b) modular processing in different cortical lamina within fields; (c) local processing in different neurons within the same locus within lamina. The author emphasized determining the learning circumstances under which adaptive information processing is invoked by the brain. Current studies reveal that the frequency receptive fields of neurons in the auditory cortex, and the physiologically plastic magnocellular medial geniculate nucleus, develop frequency-specific modification such that maximal shifts in tuning are at or adjacent to the signal frequency. Further, this adaptive re-tuning of neurons develops rapidly during habituation, classical conditioning, and instrumental avoidance conditioning. The generality of re-tuning has established that AIP during learning represents a general brain strategy for the acquisition and subsequent processing of information.

• Research Organization: California Univ., Irvine (USA)
• OSTI ID: 6138743
• Report Number(s): AD-A-202022/0/XAB
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
ARTIFICIAL INTELLIGENCE
LEARNING
PARALLEL PROCESSING
AVOIDANCE
BRAIN
CEREBRAL CORTEX
NERVE CELLS
PROGRESS REPORT
SIGNALS
SPATIAL DISTRIBUTION
ANIMAL CELLS
BEHAVIOR
BODY
CENTRAL NERVOUS SYSTEM
CEREBRUM
DISTRIBUTION
DOCUMENT TYPES
NERVOUS SYSTEM
ORGANS
PROGRAMMING
SOMATIC CELLS
990210* - Supercomputers- (1987-1989)