Lower Extremity

Question 1

base of support

Answer 1

perimeter of area in contact with supporting surface (closer COG to base of support= more stability)

Question 2

systems involved in dynamic postural control

Answer 2

strength
ROM
vision
somatosensory
vestibular

Question 3

where is center of gravity in elderly & children in relation to adults

Answer 3

higher

Question 4

gait cycle

Answer 4

contact of one extremity until the contact again of that same extremity

Question 5

step

Answer 5

contact of one extremity until contact of opposite extremity (2 steps= 1 gait cycle)

Question 6

stride

Answer 6

same as gait cycle

Question 7

gait cycle divided into

Answer 7

stance phase (60%)
swing phase (40%)

Question 8

stance phase

Answer 8

foot on ground

Question 9

swing phase

Answer 9

foot in air

Question 10

how much does ankle move with gait

Answer 10

30 degrees total
dorsiflexion 10
plantarflexion 20

Question 11

how much does knee move with gait

Answer 11

60 degrees total
stance phase 30
swing phase 60

Question 12

how much does hip move with gait

Answer 12

40 degrees total

stance: 40 flexion, 10 ext
swing: 0-40 flexion

Question 13

how much does pelvis move with gait

Answer 13

7 degree drop toward swing side
4 degree anterior/posterior tilt
10 degrees total rotation (5 fwd, 5 back)

Question 14

COG height during gait

Answer 14

highest at mid stance
lowest in double support
vertical displacement ~2”

Question 15

what muscle grade is required for
walking independently
positioning LE during dressing

Answer 15

3+

Question 16

pt needs to ambulate with assistive device with this muscle grade

Answer 16

3 or lower

Question 17

this muscle grade required for endurance for maintaining standing, walking, lifting, and balancing on the LE

Answer 17

4