3 sensory system device for extracting relevant

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Unformatted text preview: SYSTEM = DEVICE FOR EXTRACTING RELEVANT INFORMATION SENSORY SYSTEM = DEVICE FOR THROWING INFORMATION AWAY FEATURE DETECTOR EXAMPLE 2 FROG SONG MALE-MALE RESPONSE “EVOKED VOCAL RESPONSE” 4 “EVOKED VOCAL RESPONSE” ACOUSTICAL DUMMIES BIOASSAY FOR KS MALES ONLY RESPOND TO THEIR OWN SPECIES CONFIGURATIONAL STIMULUS FEATURE DETECTOR IN PERIPHERAL NERVOUS SYSTEM, NOT THE BRAIN SIMPLE CELLS FIRE FOR HIGH FREQ. ONLY 5 COMPLEX CELLS FIRE FOR LOW FREQ. BUT INHIBITED BY MIDDLE FREQ. NEED BOTH SIMPLE CELLS & COMPLEX CELLS TO FIRE REVIEW 1) IRM—> IDENTIFIED NEURAL CIRCUIT 2) FEATURE DETECTORS (VISUAL & ACOUSTIC): NEURAL NETWORKS 3) INTERACTIVE FAP SEQUENCE (FAPCROAKING FROG 1=KSCROAKING FROG2) IRM OUTPUT WE KNOW THE KEY STIMULUS, BUT WHAT DETERMINES THE PATTERN OF SOUND OUTPUT? III. CENTRAL PATTERN GENERATOR A neural circuit producing a complex, coordinated motor pattern a. e.g.: cricket song; produced by males Stridulation b. Central pattern generator: thoracic ganglia CRICKET SONG c. Are pattern generators and feature detectors coupled? 1. Hybridization experiments with crickets (Hoy, Hahn, and Paul 77). Problems with polygenic traits 6 CENTRAL PATTERN GENERATOR = NEURAL CIRCUIT FOR PRODUCING A COMPLEX, COORDINATED MOTOR PATTERN COMMAND CELL NEURONS HYBRID CRICKET SONGS IV. Feature Detectors in Predator/Prey interactions a. (male) (f...
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This note was uploaded on 10/28/2010 for the course BIEB 166 taught by Professor Nieh during the Spring '09 term at UCSD.

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