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Perception and action

Perception and action - • Some neurologically intact...

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Perception and action o The function of perception is to guide action o Effective action depends upon skilled perception The capacity of the human mind may be the ability to construct a useful representation of the world around us from the constantly changing flux of light and sound energy that reach our eyes and ear Perception feels direct, immediate, and effortless Perception is usually accurate Usually accords with the perceptions of other people Thus the objects of our perceptions seem to be “out there” in the world Much of the cerebral cortex is devoted entirely to perception Our perceptions do not always correspond to reality o Moon illusion o 3D movies o McGurk effect in speech perception o Heating and cooling topical ointments Damage to the brain can cause perplexing perceptual deficits o Visual agnosia – inability to recognize common objects o Blindsight – visual ability without visual awareness o Wernicke’s aphasia – inability to comprehend speech
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Unformatted text preview: • Some neurologically intact individuals have anomalous perceptual experiences o Protanopia – colorblindness (red and green) o Synesthesia – some ppl look at # and each one is in a halo of color o Phantom pain – limbs amputated, continue to feel the presence of the limb and its pain • Perception only seems simple and immediate because we do it so well Research methods and general principles of sensation and perception • Classification of the senses o Vision Stimulus: electromagnetic energy Receptor: photoreceptors Sensory structure: eye Cortex: primary visual cortex o Hearing Stimulus: Air pressure waves Receptor: Mechanoreceptors Sensory structure: Ear Cortex: Auditory complex o Touch Stimulus: Tissue distortion Receptor: mechanoreceptors, thermoreceptors Sensory structure: skin, muscle Cortex: somatosensory cortex...
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Perception and action - • Some neurologically intact...

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