PSYB65H3 Lecture 7: lecture 7-12
Document Summary
General principles of sensory function: sensory receptors specialized cells that transduce sensory energy into neural activity, receptors are energy filters respond to a narrow band of energy, transduction of energy: Vision light chemical energy in the photorecptors. Audition air pressure waves mechanical energy which activated the auditory receptor cells. Taste and olfaction chemical molecules in air and food receptors. Pain tissue damage releases a chemical that acts like a neurotransmitter to activate pain fibers. Receptive fields locate sensory events: receptive fields. Special parts of the world to which a sensory receptor responds. Provides a unique view of the world for each sensory system. Receptors identify change and constancy: rapidly adapting receptors: Easily activated and stop responding quickly: slowly adapting receptors: Neural relays: receptors connect to the cortex through a sequence of 4 intervening neurons, allow sensory systems to interact, relays allow sensory system to produce relevant actions.
