Reflex and Posture Flashcards Preview

Medicine, Year 2, Block 12 (Neurological, Neuromuscular, and MSK Diseases) > Reflex and Posture > Flashcards

Flashcards in Reflex and Posture Deck (10):
1

Define "balance"

Dynamics of body posture to prevent falling

2

Give examples of three strategies which help maintain posture

- Ankle strategy
- Hip strategy
- Stepping strategy

3

During normal quiet standing, which strategy is used to maintain balance?

Ankle strategy

4

In order to maintain balance, what must lie within the base of support?

A person's centre of gravity

5

Explain the reflex model of maintaining posture

The reflex model outlines that postural responses to perturbations arise by reflex pathways from sensory information

6

Explain the systems model of maintaining posture

The systems model describes that posture is maintained via postural strategies, available sensory information, prior experience and environmental context

7

State the four sensory components which help maintain balance

1. Somatosensory (skin receptors)
2. Proprioceptive (muscle spindles / golgi tendon)
3. Visual (eyes)
4. Vestibular (ear)

8

Describe the concept of the inverted pendulum

An inverted pendulum is a pendulum that has its center of mass above its pivot point

9

Define "Centre of mass"

Weighted average of centre of mass of each body segment in 3D space

10

Define "Centre of gravity"

Vertical projection of COM onto ground