Gravity & Stability

Question 1

CoG
BoS
LoG

Answer 1

Centre of Gravity
Base of Support
Line of Gravity

Question 2

All linear forces and rotary are balanced with:

Answer 2

• Linear → Balance push-pull
• Rotary → Torque

Question 3

Location of CoG in anatomical position
In females?
In infants?

Answer 3

• Anterior to 2nd sacral
• Lower (heavier lower body)
• T7

Question 4

Define postural sway

Answer 4

Body shift slightly to adjust to change in CoG

Pathological condition ↑ it
Age, fatigue, injury, pregnancy…

Question 5

Name the 3 factors affecting stability

Answer 5

• Size/shape of BoG
• Height of CoG
• LoG & BoS relation

Question 6

What does LoG refers to?

Answer 6

Line extending from CoG vertically downward

The nearer LoG to BoG, the greater stability

Question 7

2 other factors affecting stability

Answer 7

• Segmental alignement
• Physiological factors

Question 8

Segmental alignment affecting stability - definition

Answer 8

One segment out of alignment → another undergo misalignment to counterbalance

Question 9

Example of physiological factors affecting stability

Answer 9

• Vestibular system
• Drugs