Gait Cycle Stance Phase

Question 1

Initial Contact

1. Heel strikes ground
2. (a.__°) of hip flexion and slight external rotation
3. Knee fully extended
4. Ankle (b.__°) from tibia

Gluteus Maximus & (c._____): slow the leg down, reduce flexion. Also, gluteus maximus trying to pull trunk backwards to slow it down

Dorsiflexors: (d.____) working

Answer 1

a. 20
b. 90
c. Hamstrings
d. eccentric

Question 2

Loading Response

1. Hip external rotation moving toward internal rotation
2. Slight knee flexion (a.___°) moving back toward extension
3. Foot moves into pronation and plantarflexion moving into dorsiflexion

Gluteus Max & Hamstrings: slows down leg/flexion moment and pulling trunk in (b.___)
Quadriceps: absorbs shock of body; is most active during this phase
Triceps surae: in eccentric phase (elongating phase); tibia moving over foot

Answer 2

a. 20

b. extension

Question 3

Midstance

1. Trunk has moved over foot
2. Slight drop in contralateral pelvis
3. Maximum extension of hip
4. Knee reaches full extension
5. Ankle rolls into dorsiflexion; tibia rolls forward onto foot
6. Foot pronation

Iliopsoas: (a.___) working; controlling hip extension
Gluteus Medius: holds pelvis upright so it doesn’t drop under the weight of the trunk
Quadriceps: beginning to decrease with extension
Gastrocnemius: (b.___) working

Answer 3

a. eccentrically

b. eccentrically

Question 4

Terminal Stance

1. Hip in full extension, (a.__) rotation
2. Knee moving toward full extension at toe off
3. Pronation moving toward supination; external rotation of tibia on femur; maximum dorsal flexion (b.___°) moving toward maximum (c.__°) plantarflexion

(d.____) iliopsoas activity
Ankle planter flexion (concentric contraction)

Answer 4

a. external
b. 15
c. 20
d. Eccentric