PSYCO258 Chapter Notes - Chapter 3: Temporal Lobe, Optic Chiasm, Parietal Lobe
19 Apr 2014
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Document Summary
Visual agnosia: can"t identify objects visually but can identify them using other senses (ex. touch) damage to temporal lobe. Blindsight: damage in visual cortex leads to inability to see anything in a certain part of the visual field can still accurately make judgments about objects in blind pot (not consciously aware) Why do we need consciousness if we can still see subconsciously. 2 pathways: visual cortex and brainstem pathway to brainstem is older and remains intact during blindsight (unconscious) Optic ataxia: can"t reach for an object (but can identify it) Sensation: activation of sensory organs by stimulus. Transduction: conversion of physical stimulus (light or mechanical) into neural impulses. Sensory organs: hair cells (hearing), rods/cones (vision), mechanoreceptors (touch), a-beta & Perception: processing sensory info. in a way that produces conscious awareness and guides action in the world. We have perception to know what and where things are use properties such as brightness, colour, shape, size to interact with objects.
