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14 Cards in this Set

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What type of sensory information do PACINIAN CORPUSCLES respond to? Where are they located?
transient response to VIBRATION, rapid conduction, in glabrous and hair skin (deep dermis)

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