Flashcards in Balance & Posture Deck (27)
What is the point at which the force of gravity seems to be concentrated?
Center of mass/gravity
Why is the center of mass and center of gravity essentially the same thing?
Gravitational force of the earth is taken to be uniform at all places
What is the vertical line that represents gravity that passes through a system's center of mass/gravity?
Line of gravity
What is the area bound by regions of contact between a body and support surface or surfaces?
Base of support (BOS)
What is another term for balance?
What term means the ability to maintain the center of gravity within its base of support and also is resistance to disruption of equilibrium?
What is the base of support while seated? Standing?
Seated = thighs and buttocks
Standing = area between outer borders of feet
Does a larger or smaller base of support yield more stability?
What happens if the center of gravity moves beyond the limits of the base of support?
Stability limits result from what?
Interaction between velocity and position of the COG
What things can influence stability?
Muscle strength, range of motion, fear of falls, perceived stability, environmental conditions
What is the term for the stereotypical alignment of body/limb segments?
What is postural control?
Controlling body position in space for stability and orientation
What does postural control depend on?
Integrity of nervous system, MSK system, special senses
What are the primary postural muscles?
Neck extensors, paraspinals, hip extensors, gastroc-soleus, quadriceps
Which is anticipatory postural control: feedforward or feedback control?
Which is a compensatory or reactive postural response: feedforward or feedback control?
Does sensory feedback from unexpected external perturbation trigger postural responses that are associated with feedforward or feedback control?
Are postural responses made prior to voluntary movement that is potentially destabilizing in order to maintain stability during the movement seen with feedforward or feedback control?
Which is an example of a feedback control: voluntary movement or slipping on the ice outside?
Slipping on the ice outside
Which is an example of a feedforward control: voluntary movement or slipping on the ice outside?
During gait, one of the simplest ways to enhance stability is to utilize which form of control: feedforward or feedback?
What three inputs must be integrated during gait?
Visual, vestibular, proprioceptive
The Romberg test tests which input of postural control?
The Caloric Reflex Test tests which input of postural control?
What is the ultimate result of good posture?
Least amount of energy expended