PSYC 2275 Lecture Notes - Lecture 10: Lamellar Corpuscle, Dorsal Root Of Spinal Nerve, Posterior Column
8 Oct 2016
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Psyc 2275 - lecture 10 - sensory processing and touch. Sensory transduction (like epsp: converting stimulus energy into electrical energy (ex. a neural impulse, receptor/generator potential: local change in the membrane potential of a receptor cell that occurs in response to a sensory stimulus. Labelled lines: each neuron detects only a particular type of information. Sensory processing: coding: the characteristic of a stimulus (like intensity of location) are somehow represented in neural impulses, range fractionation, labeled lines. Adaptation: sensory neurons that respond vigorously at the start of stimulation, then response decreases as stimulus is maintained, good for detecting changes in the environment. Suppression: adaptation suppresses incoming information, top-down processing (cortex, thalamus) Pathways: pass through the thalamus to the cortex, except olfactory bulb sensory information. Receptive fields: stimulus region that affects activity of a neuron in the sensory system, center/surround organization, stimuli in the center of a field can excite, while stimuli in the outer portion can inhibit (and vice versa)
