Midterm Part 4 Proprioceptors: Joint Kinesthetic Receptors Flashcards Preview

Biomechanics kt's > Midterm Part 4 Proprioceptors: Joint Kinesthetic Receptors > Flashcards

Flashcards in Midterm Part 4 Proprioceptors: Joint Kinesthetic Receptors Deck (9)
Loading flashcards...
1
Q

Proprioceptors affect tone via three reflexes:

A
  1. quick stretch reflex
  2. reciprocal inhibition
  3. autogenic inhibition
2
Q

Quick Stretch Reflex is a reflex response from… and produces….

A

muscle spindles.

contraction of muscle being stretched via sensory, to spinal cord, to alpha motor neuron (monosynaptic)

3
Q

Functions of Quick Stretch Reflex

A

monitors status of muscle activity

guards against potential injury

respond to rapid and sustained pressure

4
Q

Reciprocal Inhibition is a reflex response from… and produces…

A

muscle spindles.

inhibition of antagonist so agonist can contract and cause joint movement

5
Q

Reciprocal Inhibition sequence

A

stretching via muscle contraction stimulates muscle spindle, spindle afferent to spinal cord, inhibitory interneuron inhibits antagonist, relaxes antagonist

6
Q

Autogenic Inhibition is a reflex response from… and produces…

A

GTOs.

produces an inhibitory response to a muscle that develops too much tension either via shortening or lengthening

7
Q

Autogenic Inhibition Functions:

A
  • guards against potential injury to muscles’ fibers

- muscle relaxation reduces tension applied o the muscle and tendons and protects them from damage

8
Q

Autogenic Inhibition Sequence

A

stretching tendon activated GTO neurons lb, to spinal cord, synapse w inhibitory interneurons and excitatory interneurons, inhibits agonist and activates antagonist

9
Q

DTRs or Deep Tendon Reflexes are part of routine orthopedic and neurological examinations. What do they do?

A

test the integrity of the components of the simple reflex arc and contributes to determining if there is a lower motor neuron lesion or an upper motor neuron lesion