BLG 10A/B Lecture Notes - Peripheral Nervous System, Sensory Nerve, Synovial Joint

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2 Apr 2013
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The peripheral nervous system provides links from the world outside our bodies. Includes all neural structures, outside the brain and their associated ganglia and efferent motor endings. Sensory receptors are specialized to respond to changes in their environment (stimuli) Sensation is awareness of the stimuli and perception is the interpretation of the meaning of the stimulus. Classified in three ways: (1) by the type of stimulus they detect; (2) by their body location; and (3) by their structural complexity. Mechanoreceptors respond to mechanical force (touch, pressure) Photoreceptors retina in the eye; respond to light. Chemoreceptors respond to chemicals in solution. Nociceptors respond to potentially damaging stimuli that result in pain. Exteroceptors sensitive to stimuli arising outside the body. Interoceptors respond to stimuli inside the body. Proprioceptors respond to stimuli inside the body but their location is much more restricted; occur in skeletal muscles, tendons, joints and ligaments in connective tissue coverings of bones and muscles.

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