Powerpoint Chapter 5

Powerpoint Chapter 5 - Example: somatosensory cortex,...

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Basic processes of sensation o Modification via accessory structures Example : lens of eye is accessory structure that changes light by focusing it Example : outer part of ear is accessory structure that collects sound o Transduction Process of converting energy into neural activity Occurs at sensory receptors Sensory receptors respond especially to changes in stimulus intensity Process of Adaptation Decreased responsiveness in firing of cells & conscious experiencing occurs to an unchanging stimulus over time o Encoding Coding = translation of physical stimulus properties into patterns of neural activity that specifically identify those physical properties Final output is action potentials firing down sensory neurons o Encoded Information is “Represented” in Cortex Thalamus is Relay Station for sensory information (except smell) Cortical Representations are Topographically Contralateral to part of world sensed o Topographical Representations exist in cortex
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Unformatted text preview: Example: somatosensory cortex, visual cortex, auditory cortex, etc Example : Split brain video Visual sensation begins with the modification structures in the eyeball: o Cornea o Iris o Pupil o Lens A closer look at transduction and encoding structures o Transduction structures The photoreceptive layer More cones near the fovea than rods o Encoding structures Output from bipolar cells creates coding in ganglion cells which collectivity form the optic nerve and relay ultimately to the occipital lobe Perceptual Processes: Beyond Sensation o Perception involves Construction of the World Construction involves: Selection of sensory input: Organization of sensory input: Interpretation of sensory input: o Perception construction is influenced by attitudes, preferences, and social-situational contexts of perception (i.e., expectations)...
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This note was uploaded on 03/27/2008 for the course PSY 202 taught by Professor Henriques during the Spring '08 term at Wisconsin.

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Powerpoint Chapter 5 - Example: somatosensory cortex,...

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