Normal Gait Cycle Mechanics

Question 1

position of hip on initial contact

Answer 1

30° flex

Question 2

position of hip on loading response

Answer 2

extends from 30° flex to 5° flex

Question 3

position of hip in mid-stance

Answer 3

5° flex to neutral or 0° flex/ext

Question 4

position of hip in terminal stance

Answer 4

10° ext

Question 5

position of hip in pre-swing

Answer 5

neutral

Question 6

position of hip in initial swing

Answer 6

20° flex

Question 7

position of hip in mid swing

Answer 7

30° flex

Question 8

position of hip in terminal swing

Answer 8

30° flex

Question 9

what are ms are active when in controlling hip position on initial contact

Answer 9

concentric/isometric:
- glut max
- hamstring

Question 10

what are ms are active when in controlling hip position in loading response

Answer 10

concentric:
- glut max
- hamstrings

Question 11

what are ms are active when in controlling hip position in mid stance

Answer 11

eccentric:
- glut med and TFL to control drop of contralateral pelvis

Question 12

what are ms are active when in controlling hip position in terminal stance

Answer 12

low level glut max firing

Question 13

what are ms are active when in controlling hip position in pre-swing

Answer 13

concentric:
- iliopsoas
- rectus fem

Question 14

what are ms are active when in controlling hip position in initial swing

Answer 14

concentric: (brief)
- iliopsoas
- rectus fem
- TFL
- sartorius

Question 15

what are ms are active when in controlling hip position in mid swing

Answer 15

eccentric at end:
- hamstring
- glut max

Question 16

what are ms are active when in controlling hip position in terminal swing

Answer 16

eccentric:
- hamstring
- glut max

(limits hip flex and decelerates the limb)

Question 17

position of knee in initial contact

Answer 17

full ext

Question 18

position of knee in loading response

Answer 18

15° flex

Question 19

position of knee in mid-stance

Answer 19

full ext

Question 20

position of knee in terminal stance

Answer 20

full ext

Question 21

position of knee in pre-swing

Answer 21

35° flex

Question 22

position of knee in initial swing

Answer 22

60° flex

Question 23

position of knee in mid swing

Answer 23

ext to 30° flex

Question 24

position of knee in terminal swing

Answer 24

ext to 0° or full ext

Question 25

what are ms are active when in controlling knee position in initial contact

Answer 25

eccentric - quads

Question 26

what are ms are active when in controlling knee position in loading response

Answer 26

eccentric: - quads (limits flex moment) concentric: - hamstrings

Question 27

what are ms are active when in controlling knee position in mid-stance

Answer 27

concentric - quad (early to initiate ext) eccentric - hamstring

Question 28

what are ms are active when in controlling knee position in terminal stance

Answer 28

concentric: - quads (low level)

Question 29

what are ms are active when in controlling knee position in pre-swing

Answer 29

concentric: - gastroc - hamstrings

Question 30

what are ms are active when in controlling knee position in initial swing

Answer 30

concentric (brief) - TFL - sartorius - rectus fem

Question 31

what are ms are active when in controlling knee position in mid swing

Answer 31

eccentric (low level) - hamstring (control knee ext)

Question 32

what are ms are active when in controlling knee position in terminal swing

Answer 32

eccentric: - hamstring (control knee ext)

Question 33

position of ankle in initial contact

Answer 33

neutral (0° DF) at heel strike

Question 34

position of ankle in loading response

Answer 34

15 -> 5° PF

Question 35

position of ankle in mid stance

Answer 35

5 - 10° DF

Question 36

position of ankle in terminal stance

Answer 36

neutral at heel off just prior to contralateral leg's initial contract

Question 37

position of ankle in pre-swing

Answer 37

15 - 20° PF

Question 38

position of ankle in initial swing

Answer 38

DF to 5-10° of PF

Question 39

position of ankle in mid swing

Answer 39

neutral (0° DF)

Question 40

position of ankle in terminal swing

Answer 40

neutral (0° DF)

Question 41

what are ms are active when in controlling ankle position in initial contact

Answer 41

eccentric: - pre-tibials

Question 42

what are ms are active when in controlling ankle position in loading response

Answer 42

eccentric pre tibs -> eccentric PFs

Question 43

what are ms are active when in controlling ankle position in mid-stance

Answer 43

eccentric - PFs (control forward motion of tibia over foot

Question 44

what are ms are active when in controlling ankle position in terminal stance

Answer 44

concentric (in late terminal) - PFs

Question 45

what are ms are active when in controlling ankle position in pre-swing

Answer 45

concentric PF firing weakens and then is silent

Question 46

what are ms are active when in controlling ankle position in initial swing

Answer 46

concentric (low level) - pre-tibials

Question 47

what are ms are active when in controlling ankle position in mid swing

Answer 47

concentric (low level) - pretibials

Question 48

what are ms are active when in controlling ankle position in terminal swing

Answer 48

concentric (low level) - pretibials

Question 49

position of pelvis in initial contact

Answer 49

5° forward rotation (transverse plane)

Question 50

position of pelvis in loading response

Answer 50

5° forward rotation (transverse plane)

Question 51

position of pelvis in mid stance

Answer 51

neutral rotation 5cm lat movement and elevation

Question 52

position of pelvis in terminal stance

Answer 52

5° posterior rotation (transverse plane)

Question 53

position of pelvis in pre-swing

Answer 53

neutral rotation

Question 54

position of pelvis in initial swing

Answer 54

starts to rotate forward - 5° of depression

Question 55

position of pelvis in mid swing

Answer 55

forward rotation

Question 56

position of pelvis in terminal swing

Answer 56

5° forward rotation