Quiz 4/15 All Normal Gait Info

Question 0

Name IC critical events

Answer 0

Heel first contact, heel rocker initiated, impact decelerated

Question 1

What happens to gait with weak calves?

Answer 1

Calf strength is required to maintain the isometric hold of the heel off the ground in the forefoot rocker in terminal stance. Calf weakness leads to an inability to attain this rigid lever of 10° of dorsiflexion. Without this heel off step length is shortened significantly. If step length is too short there is not enough room for adequate knee flexion in pre-swing. A bad pre-swing means a bad gait. Without adequate pre-swing there has to be large compensations to try to achieve forward progression, leading to gait abnormalities.

Question 2

Name LR critical events

Answer 2

Hip stability, controlled knee flexion, controlled ankle PF, heel rocker progression

Question 3

Name MSt critical events

Answer 3

Controlled tibial advancement, ankle rocker, knee extension, coronal plane hip stability

Question 4

Name TSt critical events

Answer 4

Controlled dorsiflexion/locked ankle, heel rise, forefoot rocker, trailing limb

Question 5

Name PS critical events

Answer 5

Passive knee flexion to 40°, ankle plantarflexion, toe rocker

Question 6

Name IS critical events

Answer 6

Hip flexion to 15°, knee flexion to 60°

Question 7

Name MSw critical events

Answer 7

Hip flexion to 25°, dorsiflexion to 0°

Question 8

Name TSw critical events

Answer 8

Knee extension 0°, ankle dorsiflexion to 0°, hip and knee deceleration

Question 9

GRF vector anterior to the hip equals what torque?

Answer 9

Flexion torque = hip extensor activity

Question 10

GRF vector posterior to the hip equals what torque?

Answer 10

Extension torque = passive stability of iliofemoral ligaments

Question 11

GRF vector anterior to the knee equals what torque?

Answer 11

Extensor torque = quads shut off

Question 12

GRF vector posterior to the knee equals what torque?

Answer 12

Flexion torque = quads on

Question 14

Torque and muscle demand LR

Answer 14

Post to ankle - PF torque = pretibials on
Post to knee - flexion torque = quads on
Ant to hip - flexion torque = extensors on + abductors

Question 15

Torque and muscle demand MSt

Answer 15

Ant to ankle - DF torque = calf on
Post then Ant to knee - flexion then extension torque = quads on initially then off
Through the hip - no torque = abductors on

Question 16

Torque and muscle demand TSt

Answer 16

Ant to ankle - DF torque = calf on
Thru knee - no torque = no muscle activity
Thru hip - no torque = no muscle activity

Question 17

Torque and muscle demand PS

Answer 17

Adductors on only

Question 18

Muscle demand IS

Answer 18

Hip flexors
Knee flexors
Ankle pretibials

Question 19

Muscle demand MSw

Answer 19

Hip flexors initially the HS to slow swing limb advancement.
Knee flexors
Pretibials

Question 20

Muscle demand TSw

Answer 20

Hip extensors to slow
Knee extensors
Pretibials

Question 24

Torque and muscle demand IC

Answer 24

Post to ankle - PF torque = pretibials on
Post to knee - flexion torque = quads on
Ant to hip - flexion torque = extensors on