Biomechanics of Gait

Question 1

stance phase

Answer 1

-feet on ground
-60% of gait cycle
-stride length (2 steps)
-step length (1 heel contact)

Question 2

swing phase

Answer 2

-40% of gait cycle

Question 3

events with gait cycle

Answer 3

-heel strike
-foot flat
-mid stance
-heel off
-toe off
-swing phases

Question 4

heel strike

Answer 4

-initial contact of heel and ground
-vector behind ankle, knee, in front of hip
-glute max(ecc), hamstrings, quads (ecc)

Question 5

foot flat

Answer 5

-foot flat on ground
-hip flexed moving towards ext, knee flex, ankle PF
-tibialis anterior (ecc)

Question 6

mid stance

Answer 6

-foot, hip, knee, lined up
-hip neutral, knee neutral, ankle DF
-increase tricep surae

Question 7

heel off

Answer 7

-heel begins to lift off ground
-hip extension, knee begins to flex, ankle max DF
-increase gastroc (concentric), increase iliopsoas (concentric)

Question 8

toe off

Answer 8

-toe off ground, no longer in stance phase

Question 9

swing phase

Answer 9

-thigh lines up

Question 10

flat arch

Answer 10

-pronating

Question 11

high arch

Answer 11

-supinating

Question 12

6 determinants of gait

Answer 12

control COG height
1)relative rotation
2)pelvic tilt
3)knee flexion in stance phase
4)ankle mechanism (DF)-heel contact of opp leg
5)ankle mechanism (PF)- toe off
Control COG lateral movement
6) step width