PSYA01H3 Chapter Notes - Chapter 5: Auditory System, Sensory System, Visual System

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Published on 12 Apr 2013
School
UTSC
Department
Psychology
Course
PSYA01H3
Chapter 5 Sensation
Info. of outside world learned detected by sensory organs transmitted to brain via sensory nerves
Sensory systems process differently for diff. sources of info
Visual system (variable) provides stability of head movement, during input
Auditory system, changes = gradual so more processing time
Senses contribute to experience
Sensory Processing
Sensation = detection of basic stimuli traits (i.e. brightness, sweetness)
Perception = detection of object location, movement, and their backgrounds
o Transduction = sense organs convert environ. EN into neurons
Receptor cells get info….release transmitter = stimulate o/ neuron
o Sensory Coding
Info from S.organs coded into axon to carry to brain…
Anatomical Coding: the way Nervous S. represent info by diff neurons (location)
For skin = anatomical
“neural map” primary somatosensory cortex
Primary Visual Cortex has map for visual field
Temporal Coding by rate (time) by neurons…intensity
o Psychophysics: measure relation b/w stimuli + perception
Just-Noticeable Difference (jnd) Weber = change in stimuli magnitude that
person can detect
Weber fraction ratio b/w jnd and mag. of stimulus…constant
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Document Summary

Info. of outside world learned detected by sensory organs transmitted to brain via sensory nerves. Sensory systems process differently for diff. sources of info. Visual system (variable) provides stability of head movement, during input. Auditory system, changes = gradual so more processing time. Sensation = detection of basic stimuli traits (i. e. brightness, sweetness) Perception = detection of object location, movement, and their backgrounds: transduction = sense organs convert environ. Receptor cells get info . release transmitter = stimulate o/ neuron: sensory coding. Info from s. organs coded into axon to carry to brain . Anatomical coding: the way nervous s. represent info by diff neurons (location) Primary visual cortex has map for visual field. Temporal coding by rate (time) by neurons intensity: psychophysics: measure relation b/w stimuli + perception. Just-noticeable difference (jnd) weber = change in stimuli magnitude that person can detect.

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