ROLE OG PNF Flashcards
1
Q
Explain function of golgi tendon organs (GTOs)
A
- Detect tension in muscle (created during isometric contraction phase).
- Sends inhibitory signals to CNS to relax antagonist muscle (autogenic inhibition).
- Delays stretch reflex.
- Allows for greater range of movement.
2
Q
Explain function of muscle spindles (stretch receptors)
A
- Provide info to CNS when muscle is contracting.
- Create stretch reflex to contract antagonist.
- Prevent overstretching.
3
Q
The physiology- name the 7 steps
A
- When stretch occurs, muscle spindles detect changes in muscle (fibres).
- Causes stretch reflex (proprioceptor) to be activated.
- Although stretch reflex designed to prevent overstretching.
- Aim of PNF is to override stretch reflex so it does not occur.
- Golgi Tendon organs (GTOs) activated, which detect overstretching of muscles.
- They can cause muscles to relax + lengthen- called autogenic inhibition.
- In turn, this allows greater range of movement than initial stretch (greater range of movement in training session).