biomech of pro gait

Question 1

what is the weight acceptance part of gait

Answer 1

initial contact
loading

Question 2

what is the stance/single limb support part of gait

Answer 2

mid swing

terminal swing

Question 3

what is the swing/limb advancement part of gait

Answer 3

pre swing
initial swing
mid swing
terminal swing

Question 4

what kind of moment is it at initial contact

Answer 4

knee ext moment

varus moment

Question 5

IC - ground reaction force

Answer 5

in front of hip - pulling into flexion

behind knee - pulling into ext

behind foot - pulling into PF

the body is trying to resists these moement created by the ground reaction force

Question 6

Varus moment - ground reaction force

Answer 6

• Medial knee – varus moment
• Medial hip – abductor, fall away from the line

Question 7

Transtibial IC

Answer 7

the PF torque is transitioned up the whole chain

The prothesis will pull the leg forward and push them into knee flexion

Question 8

Transfemoral IC

Answer 8

cannot use quad to compensate for torque moment

• Use glutes, hamstrings pull the femur into extension
• Fire the glute and push back against the socket

Question 9

loading response GRF

Answer 9

knee flexion moment
ankle - PF

knee - flex

hip - ext

Varus response remains

Question 10

mid stance moments

Answer 10

knee flex and ext moments

Question 11

terminal stance moments

Answer 11

initial heel rise and knee ext moment

decreased varus moment

Question 12

pre swing moments

Answer 12

heel rise/toe off and knee flex moment

Question 13

what are factor that infulence gait

Answer 13

eitology: dysvascualr or trauma

location: tib or femur

Question 14

what was the greatest O2 consumption

Answer 14

transfemoral and dysvascular

Question 15

what is normal O2 consumption

Answer 15

.15%

Question 16

what is the goal in amb with pro

Answer 16

stabilize the knee without limiting mobility

Question 17

alignment term - bench

Answer 17

the initial alignment produced before pt fitting

Question 18

alignment term - static

Answer 18

with pro on pt some WB before walking

Question 19

alignment term - dynamic

Answer 19

have the pt walk with pro

different gait characteristic will indicate areas of misalignment

Question 20

where does the kinematic chain close

Answer 20

the wall of the pro socket

important for socket pressure and skin integrity

Question 21

what are some factors that will influence transtibial gait - A-P stability

Answer 21

knee ext

hip ext

limb length

ROM

activity level

Question 22

what are some factors that will influence transtibial gait - M-L stability

Answer 22

co-contraction of quads and hamstring from IC > mid stance

timing of hip abd

ligamentous stability of the knee

Question 23

what is socket flexion

Answer 23

bench

the proximal end of the socket is ant tilted on the pylon in regards to the foot flat on the floor

Question 24

what is the goals of socket flexion and lateral tilt of the socket

Answer 24

max WB of the residual limb

Question 25

what is the lateral tilt of the socket for

Answer 25

to max contact with the residual limb for max weight bearing

Question 26

what does too much transtib socket flexion do

Answer 26

excessive knee flexion moment require excessive knee ext (quads) strength - this increases pressure of the ant distal and post proximal parts of the residual limb the occurs when the chain in closed

Question 27

what does malalignment of the lateral tilt or the foot position on the socket do

Answer 27

creates an excessive varus of valgus moment at the knee

Question 28

how do we inspect for a M-L misalignment transtib

Answer 28

foot flat in midstance

Question 29

what are some factors that will influence transfemoral gait - A-P stability

Answer 29

hip extensors/core pelvic anterior translations in midstance limb length ROM activity level ability to chnage cadence

Question 30

what are some factors that will influence transtibial gait - M-L stability

Answer 30

limb length trong isp abd strong core activity level

Question 31

what alignment for transfemoral do we use to max A-P stability

Answer 31

initial socket flexion

Question 32

what does initial socket flexion facilitate

Answer 32

use of glute max max strength at mid range places the knee center post to the hip and ankle in stance

Question 33

what aligment does a hip flexion contracture cause

Answer 33

the distal femur to sit anterior to the hip and the foot

Question 34

mid stance with a hip flexion contracture

Answer 34

knee flex moment?

Question 35

what is the initial bench aligment of the tranfemoral in the M-L view

Answer 35

hip abd

Question 36

what does a hip abd alignment allow for

Answer 36

takes advantage of hip abd and max contact with the shaft of the femur

Question 37

right glute weakness what are we going to see

Answer 37

pelvic drop - right lateral trunk lean - right

Question 38

right glute weakness what are we going to see - compensated

Answer 38

pelvic drop right lateral trunk lean - left

Question 39

what is the AMP good at predicting

Answer 39

K levels not conculsive on fall risks