posture

Question 1

def of posture

Answer 1

relative arrangement of body’s segments to allow for erect bi-pedal movement

Question 2

BOS = base of support (2)

Answer 2

distance from outside of L foot -> outside of R foot,

distance from back of heels -> front of toes

Question 3

COG/ COM
where it is
how does this relate to: postural stability and BOS?

Answer 3

point on body where mass is concentrated around.
anterior S1
lowering COG => increase postural stability
if this goes outside BOS we lost stability

Question 4

gravity and posture

action lines and magnitude

Answer 4

action line - drop a line in front of or behind joint to represents work of gravity = moving COG in front or behind joint
magnitude - how close it is to joint
close to joint = less magnitude (because of torque)

Question 5

action line in front of ankle

action line in back of ankle

Answer 5

dorsiflexion moment

plantarflexion moment

Question 6

action line in front of knee

action line behind the knee (squat)

Answer 6

extension moment

flexion moment

Question 7

action line in front of hip

action line behind hip

Answer 7

flexion moment

extension moment

Question 8

where is action line in AO joint?
where is the action line in C-spine?
where is action line in thoracic spine?
where is action line in lumbar spine?
where is action line in SI joint?

Answer 8

AO joint in front
c-spine: behind, so it creates  extension moment
 C5 = apex (most posterior convexity)
t-spine = front => flexion
 T8 = apex
lumbar spine= back => extension 
 L3 = apex
SI joint = front (nutation)