Lecture 37 - Sensory Function: General Principles stimulus...

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Sensory Function: General Principles light sound gravity taste smell ‘somatic’ ‘stimulus’ electrical signal site of ‘sensory transduction’ ‘receptor’ ‘black box’
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General Senses receptors distributed throughout body (particularly on body surfaces) not collected within specialized ‘sense organs’ 4 types: 1. Pain (‘nociceptors’) 2. Temperature (‘thermoreceptors’) 3. Touch, pressure, body position (‘mechanoreceptors’) 4. Chemical stimuli (‘chemoreceptors’ - O 2 , CO 2 )
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‘Somatic’ Senses vs ‘Visceral’ Senses Somatic - body surface Visceral - internal organs (stomach ache, ‘gut cramps,’ etc.) (surface temp, touch, pain & muscle soreness)
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Special Senses receptors congregated in specialized ‘sense organs’ 5 types: 1. Smell (‘olfaction’) - nose 2. Taste (‘gustation’) - tongue 3. Balance/Equilibrium- ear 4. Sound (hearing) - ear 5. Sight (vision) - eye
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Specificity of Sensation Regardless of stimulus ‘modality,’all sensation is ‘read’ in the CNS as electrical signals We can ‘discriminate’ between different types
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This note was uploaded on 09/11/2011 for the course PSIO 201 taught by Professor Stanescu during the Summer '08 term at University of Arizona- Tucson.

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Lecture 37 - Sensory Function: General Principles stimulus...

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