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  1. Key elements involved with skeletal muscle reflexes

    • Anterior Motor Neurons

    • -alpha motor neurons

    • motor unit

    • Gamma Motor Neurons

    • -Intrafusal fibers/muscle spindle

    • Other Neural Elements

  2. Renshaw inhibitory cells
    • things can contract and relax
    • so active bicep, the inhibitory causes tricept to relax
    • found within the spinal cord at every segment
  3. Ingternurons
    • communicate between sensory and motor neurons, and between neurons that go up and down cord,

    • link between Ie C5and C6.

  4. Golgi tendon organ responds to
    • responds to stretch,
    • monitors tension within the
    • muscle,
    • responds to both static an dynamic stimulus.
  5. How does the Golgi tendon organ work?
    • Dynamic keeps muscle from tearing, too much tearing cause
    • gamma motor neuron to relax, causes muscle to lengthen allowing for further
    • movement.
    • Static-standing there all day you get muscle fatigue, tension within

    • golgi starts to let go, muscle spindle kicks in to keep you from falling over,
    • they balance each other out.
    • Protection against injury, both involved in reflex complex.

  6. Somato-somatic reflexes

    Stretch reflex

    • (+) reflex=rapid

    • lengthening causes rapid involuntary shortening/contract ion

    • –causes to contract
    • Motor Neuron-Anterior portion of cord -ventral
    • Sensory –Dorsal portion of cord
    • (-) Reflex = shortening causes rapid normalization of muscle
    • belly length.
    • Causes to relax

  7. Muscle Spindle has what neurons?
    • both sensory and motor
    • its monitors length of muscle and rate of change
  8. Reciprocal inhibition reflex
    • pin in your finger, causes bicep to contract and tricep to

    • relax
  9. Viscero-Somatic influences

    via the nervous (central, peripheral, and autonomic) systems

  10. Somato-Visceral influences

    via the nervous (central, peripheral, and autonomic) systems

  11. Sensory reflex travel and viseral response
    • Afferent sensory information too cord sends
    • efferent motor information away from cord,
    • you also get visceral response with
    • there is a lesion in the spine
    • Ie T8 lesion has influence over gall bladder, pancreas etc.

    • Sensory info from pancreas goes back through same area of cord, you then get a motor response which causes further shortening of the postural muscles of theback.
    • So internal problem causes back problem, or back problem causes influence on organ structure.

    • It’s a 2 way street.

  12. Viscero-Somato would be then a reflex lesion-
    most lesions of body have a reflex component to them.
  13. Viscero-Visceral Reflexes

    • Found in all of the bodies systems and may be local(influencing the structure which generated the impulses)

    • or systemic(influencing other structures in response to a given stimuli)

    • ie-gall bladder problem, you take in high fat diet, no proper absorption, small intestine irritation in the wall and you get diarrhea.

  14. Psycho-Somato-Visceral Reflexes

    • The mind influences the body and vice versa via complexinterconnections and interactions.

    • Stress from the test, causes shortening of shoulder muscles, gives you a headache.

    • Stress from test, causes tense muscles of belly and you get cramps, stomach gets nauseas and you puke.

  15. Pacinian Corpuscle
    • located in skin detects vibration and pressure. Send info to

    • dorsal root of cord, and you get a motor response from ventral side to get an
    • action.
  16. Skeletal muscle reflex travels:
    • dorsal side sensory to cord, comes out motor to
    • skeletal muscle to get muscle contraction.
  17. Ganglion- associated with visceral organ - is located?
    • located right in front of ribs attached to the spine,

    • nerves that come out of that go to organs, two way street here, both motor and sensory responses.

    • IF pancreas isn’t working sends info through dorsal root to get motor response through ventral side causes muscles around that organ to shorten and contract.

  18. Preganglion sympathetic nerves
    • help control blood supply.

    • Area that’s been tight for a long time not good blood supply the skin looks blanched or white, release muscular tissue and it flushes as the blood supply increased to that area.

    • White area in area of dysfunction, release the muscle and skin may get warm or red.

Card Set:
2011-06-06 03:53:58
Structure function reflexes Brandon

Structure and function of reflexes
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