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14 Cards in this Set
- Front
- Back
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What type of sensory information do PACINIAN CORPUSCLES respond to? Where are they located?
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transient response to VIBRATION, rapid conduction, in glabrous and hair skin (deep dermis)
(concentric circles) |
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What type of sensory information do RUFFINI CORPUSCLES respond to? Where are they located?
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slow adapting response to stretch, in glabrous skin only (dermis); contributes proprioceptive info
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What type of sensory information do MERKEL CELLS respond to? Where are they located?
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slow adapting response to pressure/texture, mostly in glabrous skin, superficial-underneath fingerprint ridges
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What type of sensory information do MEISSNER'S CORPUSCLES respond to? Where are they located?
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fast adapting response to light touch, in glabrous skin only; is a fluid filled capsule located superficially and coupled to papillary ridge
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What type of sensory information do BARE NERVES respond to? Where are they located?
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responds to heat, cold, nocioceptive stimuli, located in superficial and deep dermis, also includes hair receptors, slow conducting
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What 3 receptors participate in proprioception?
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Ruffini corpuscles, golgi tendon organs, and muscle spindles
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What type of muscle movement do muscle spindles respond to?
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respond to muscle stretch -> are in parallel with extra-fusal muscle fibers
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What type of muscle movement do Golgi tendon organs respond to?
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respond to muscle contraction -> are in series with intra-fusal muscle fibers
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What receptor is responsible for the stretch reflex?
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muscle spindles (i.e. knee-jerk reflex)
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What receptor is responsible for the inverse stretch reflex?
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Golgi tendon organs (as a feedback system to counteract the stretch reflex after muscle contracts)
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What is the flexion reflex?
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withdrawl reflex that excites flexors and inhibits extensors
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What is the crossed extension reflex?
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in concert with the flexion reflex, excites extensors of opposite limb to maintain support while other limb withdraws
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What is hyperalgesia?
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increase in magnitude and duration of pain evoked by painful stimuli (usu due to sensitization of injured area)
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What is allodynia?
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when normal innocuous stimuli now evoke sensation of pain (e.g. sunburn); occurs in areas of hyperalgesia
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