nervous system

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nervous system
2011-10-03 19:38:51
nervous system

nervous system
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  1. Exteroceptive Reflexs
    Exterior stimuli
    Extensor thrust
    • -pressure against the foot
    • -stimulates to Pacinian corpuscles in the subcutaneous tissue
    • -elicits the reflex contraction of the extensor muscles of the lower extremity
    • ex: jumping over a hurdle, one leg will thrust your other leg
  2. Exteroceptive Reflexs
    2. Crossed Extensor Reflex
    cooperates w flexor reflex response to pain in a weight bearing limb

    self protection

    ex. step on sharp shell, other leg holds you up
  3. Exteroceptive Reflex
    3. Flexor Reflex
    • -response to pain
    • -self protection
    • flexor-withdrawal
    • we don't have to decide
    • pain awareness after withdraw
    • pain no part of reflex action
    • -reflexes that occur in response to stimulation of receptors located in the:Skeletal musclestendons,joints,labyrinths of the ear reltated to motions and postions of the body
    • -internal stimulus (not external)
  5. Stretch Reflex (Myotatic)
    • -stretch on the muscle stimulates the muscle spindle
    • -reflex contraction of the stretched muscle and its synergists and relaxation of its antagonists
  6. Stretch Reflex (Myotatic)
    Phasic Response-moving
    • -reflexes rapid
    • -contraction brief duration
    • -if stretch is sudden and strong, the stretched muscle contracts quickly and forcefully
    • ex. knee jerk when hit with hammer drs. office
  7. Stretch Reflex (Myotatic)
    Tonic Response-still
    • -slow stretch
    • -greater or prolonged stretch is neccessary to elicit this response

    ex. wt placed in the hand with the forearm at 90 degrees at elbow. response subtle depression(extension at elbow) immediately followed by a return movement to compensate
  8. Tendon Reflex
    • -reflex effect is to inhibit impulses from the motor nerve to the muscle
    • -synergists, thus causing the muscle to relax
    • -antagonist contracts from being facilitated
    • Gradually get more ROM
  9. Kinesthesia
    • -conscious awareness of position of pody parts
    • -the amount and rate of joint movement
    • -how you move in your space
  10. Kinesthetic perception and memory
    are the basis of voluntary movement and motor learning

    • EX. writing your signature
    • this perception and memory enable the performer to initiate a whole movement pattern or modify a part of it
    • -when motor neurons are transmitting impulses to muscles, causing them to contract
    • -motor neurons that supply their antagonists are simultanelously and reciprocally inhibited
    • -agonists turned on
    • antagonist turned off
    • -relaxation occurs to the extent that the agonist are innervated
  12. areas of brain
    cerebrum-highest mental functions

    frontal lobe- personality, motor movement, speech

    occipital lobe-vision,recog size, shape, color

    parietal lobe-touch, pressurefine sensation

    temporal lobe-behavior, hearing. language,


    hypothalamus-hormone function, behavior

    basal ganglia-coordination of motor movement

    midbrain-visual reflexes

    medulla oblongata-automatic control of respiration andheart rate

    cerebellum-muscle coordination, tone, posture
  13. Goniometry
    study of the measurement of angles created at human joints of the body
  14. Manual muscle testing
    approach to assess muscle strength and function as fundamental components of movement and performance through manual resistance

    used to determine the extent and degree of muscle weakness resulting from disease, injury or disuse.