Dynamic Posture Flashcards
Body is balanced when COM is ___
within the base of support
COM is located at ___
navel (when standing)
Changes with positioning (Height)
Center of pressure
where force is being applied to surface of the plate.
driving variable to affect COM
Changes in sway is due to trying to maintain COM
Gives impression of what COM is doing
Closer COM to the Center of base of support =
more stability! The higher the COM the more risk of falls
What systems are involved in dynamic postural control?
- Vision
- Somatosensory
- Vestibular
Peripheral vision goes down with age.
Order of Strategy Use - Postural Control
First
- Ankle
- Hip
- Step
Last
As we age the ankle strategy is ____
reduced significantly
What do older adults rely on for postural control?
Hip.
Being pushed from behind, what muscles activate and what order?
Ankle
Gastroc, hamstring, paraspinal (distal to proximal)
Being pushed from front, what muscles turn on and what order?
Ankle
Tibialis anterior, quadriceps, and abdominals (distal to proximal)
Same side of push
Hip pertibations react by activating the muscles on the ___
opposite side toward which COM is shifted or pertubed
Push from behind
Hip
activity of quads and abdominals
Opposite side of push
Push from front
Hip
Ham and paraspinals
Opp side of push
minmizing somatosensroy and vision input makes us rely on
vestibular
minimizing sotatosensroy input makes us rely on…
vision and vestibular
