Lecture 4 - Sensory Mechanisms-Updated

Respond to weak electrical signals emiied by all

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Unformatted text preview: –  Can result from problems in brain or nerves –  Most significant cause is repeated, long ­term exposure to loud noise –  Nearly 40 million Americans are exposed daily to dangerous noise levels as a result of their occupa6on –  cochlear implants can be implanted to generate sound 26 Mechanorecep6on and deafness hip://www.youtube.com/watch?v=s9H_StoVsPU hip://www.youtube.com/watch?v=HTzTt1VnHRM 27 Mechanorecep6on and deafness hip://www.freemosquitoringtones.org/ 28 •  BREAK! Skin’s sensory receptors •  Thermoreceptors –  Respond to cold and heat –  Help regula6on of body temperature •  Nociceptors (pain receptors) – respond to extreme heat, cold, and or pressure –  Detect any type of 6ssue damage, detect par6cles released by lysed cells –  It does not need to go to the brain to react (withdraw hand if you touch something too hot) 30 Skin’s sensory receptors and Pain •  Pain disorders –  Congenital analgesia: pa6ent cannot feel physical pain –  Phantom limb: pa6ents perceive physical pain in a limb that has been amputated 31 Electromagne6c receptors •  Detect wide range of the electromagne6c spectrum –  Visible light, UV and infrared light as well as electrical and magne6c s6muli •  Photoreceptors –  Respond to visib...
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This document was uploaded on 03/05/2014.

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