Exam 1

Question 1

what % of gait is initial contact

Answer 1

0%

Question 2

what % of gait is loading response

Answer 2

0-10%

Question 3

what % of gait is mid stance

Answer 3

10-30%

Question 4

what % of gait is terminal stance

Answer 4

30-50%

Question 5

what % of gait is pre swing

Answer 5

50-60%

Question 6

what % of gait is inital swing

Answer 6

60-73%

Question 7

what % of giat is mid swing

Answer 7

73-87%

Question 8

what % of gait is terminal swing

Answer 8

87-100%

Question 9

what does F1 represent in the vertical GRF component graph

Answer 9

first peak
at weight acceptance
due to the action of body momentum

Question 10

what odes F2 represent in the GRF component graph

Answer 10

only valley
at midstance
created by the rise of COG

Question 11

what does F3 represent in the vertical GRF component graph

Answer 11

second peak
at midstance
created by the rise of COG

Question 12

how does walking speed affect vertical GRF component graph

Answer 12

increased speed = higher peaks and lower vallies

running = only peak, no valley

Question 13

what % body weight is F1 + F3

Answer 13

~110%

Question 14

what % body weight is F2

Answer 14

~80%

Question 15

what is the overall purpose of stance phase

Answer 15

weight acceptance
single limb support
forward progression

Question 16

what is the overall purpose of swing phase

Answer 16

swing limb advancement
foot clearance

Question 17

explain the objectives of inital contact

Answer 17

start of 1st rocker
impact deceleration

Question 18

explain the objectives of loading response

Answer 18

shock absorption
weight bearing stability
preservation of progression

Question 19

what is the critical event of initial contact

Answer 19

heel contact

Question 20

what are the critical events of loading response

Answer 20

pre-tib muscles eccentrically control plantarflexion

quadriceps active to control knee flexion moment

hip extensors active to stabilize

Question 21

what are the objectives of midstance

Answer 21

progression over stationary foot
limb and trunk stability

Question 22

what are the objectives of terminal stance

Answer 22

progression of body beyond the supporting foot
limb and trunk stability

Question 23

what is the critical event of midstance

Answer 23

dorsiflexion controlled eccentrically by gastroc and soleus

Question 24

what is the critical event of terminal stance

Answer 24

trailing limb

Question 25

what are the objectives for preswing

Answer 25

position of limb for swing accelerate progression

Question 26

what are the objectives of inital swing

Answer 26

foot clearance advancement of the limb from he trailing limb position

Question 27

what are the objectives for midswing

Answer 27

limb advancement foot clearance

Question 28

what are the objectives of terminial swing

Answer 28

complete limb advancement prepare limb for stance

Question 29

what is the critical event of preswing

Answer 29

passive knee flexion (40 degrees)

Question 30

what are the critical events of inital swing

Answer 30

peak knee flexion (60 deg) for toe clearance 15 deg of hip flexion

Question 31

what is the critical event of midswing

Answer 31

neutral ankle to slight DF

Question 32

what is the critical event of terminal swing

Answer 32

knee extension to neutral (5 deg flx)

Question 33

what two phases of gait make up weight acceptance

Answer 33

initial contact + loading response

Question 34

what tow phases of gait make up single limb support

Answer 34

midstance + terminal stance

Question 35

what phases of gait does the pelvis tilt anteriorly

Answer 35

terminal stance and terminal swing

Question 36

how does the pelvis move during weight acceptance

Answer 36

4 degrees of contralateral pelvic drop

Question 37

during preswing, how does the pelvis move

Answer 37

4 degrees of ipsilateral pelvic drop

Question 38

what phases of gait does the pelvis protract

Answer 38

terminal swing and initial contact

Question 39

what phase of gait doe sthe pelvis retract

Answer 39

terminal stance

Question 40

what phases of gait does the pelvis neutrally rotate

Answer 40

midswing and mid stance

Question 41

how do the UE move fduring gait

Answer 41

peak passive flexion of 8 deg with contralateral initial contact peak passive extension of 24 deg during ipsilateral inical contact

Question 42

explain the critical joint angles and timing of gait for the ankle

Answer 42

neutral ankle during swing 20 deg of DF in terminal stance

Question 43

list the critical joint angles and timing of gait for the knee

Answer 43

60 deg of flx in initial swing 20 deg flexion in loading response 0 deg at initial contact and midstance

Question 44

list the critical joint angles and timing of gait for the hip

Answer 44

25 deg of flx in midswing 20 deg ext in terminal stance

Question 45

list the critical mm activity during gait at the ankle

Answer 45

ant tib during loading response (eccentric) ant tib during swing (concentric) gastrocnemius durign stance (eccentric), turns off in preswing

Question 46

list the critical mm activity during gait at the knee

Answer 46

no hamstring or quad mm activity during midswing quad active during stance to control knee flx moment