Week 1 Sit to Stand

Question 1

what are the video analysis markers

Answer 1

5th metatarsal head, lateral malleolus, LE femur, greater trochanter, mid iliac crest, acromion process, Frankfort plane

Question 2

what is the Frankfort plane

Answer 2

the point between the tragus of the ear, and the lowest point of the orbit.

Question 3

what is the first phase of a sit to stand

Answer 3

the flexion momentum

Question 4

describe the flexion momentum phase of the sit to stand

Answer 4

this is when you have a forward flexion of the trunk and the pelvis, but before lift off.

Question 5

what is the functional task of the flexion momentum phase

Answer 5

shift your weight bearing from your hips to your feet

Question 6

what 3 critical events happens with flexion momentum

Answer 6

you have ankle dorsiflexion
momentum
COM moving forward

Question 7

at what range of motion are the pelvis, hip, knee, and ankle in during the flexion momentum phase

Answer 7

pelvis is anteriorly tilted,
Hip: 120 flexion
Knee: 100 flexion
ankle: 15 DF

Question 8

what does the EMG of the lower leg look like during flexion momentum phase

Answer 8

there is increased tibialis anterior action, and still some calf action going on.

Question 9

is the flexion momentum phase a phase in which there is a large displacement? also, it is a vertical or horizontal displacement

Answer 9

it is a smaller horizontal displacement.

Question 10

what is the second phase of the sit to stand

Answer 10

the momentum transfer phase

Question 11

how would you describe the momentum transfer phase

Answer 11

butt lift off from the surface, where you end in maximal DF

Question 12

what is the functional task of the momentum transfer phase

Answer 12

weight bearing from hips to the feet

Question 13

what are the 3 critical events of the momentum transfer phase

Answer 13

COM moves forward
Ankle DF
Weight acceptance.

Question 14

at what range of motion are the pelvis, hip, knee, and ankle in during the momentum transfer phase

Answer 14

pelvis: anteriorly rotated
hip: 120 flexion
knee: 100 flexion
ankle: 15 DF

Question 15

what does the lower leg EMG look like during the momentum transfer phase.

Answer 15

you get more soleus activity coming on, because the pelvis is lifting off, and you need to control the amount of movement forward we have. Without the calfs, we would fall forward on our faces. we get less tibialis anterior stuff going on here.

Question 16

what does the EMG of the upper leg look like during momentum transfer phase

Answer 16

you get quad activation because you are bringing the COM forward. and you also get some glue max and hamstrings. the posterior muscles are controlling the amount of forward movement we get. they are co contracting.

Question 17

whats a good way to think of the gluts and hamstrings during the momentum transfer phase

Answer 17

they are like a breaking system

Question 18

is the momentum transfer phase a phase in which there is a large displacement? also, it is a vertical or horizontal displacement

Answer 18

larger horizontal displacement.

Question 19

what is phase 3 of the sit to stand

Answer 19

extension phase

Question 20

what happens during extension phase

Answer 20

this is from max DF to hip extension

Question 21

what is the functional task of the extension phase

Answer 21

weight bearing from the hips to the ankles

Question 22

what critical events happen during the extension phase

Answer 22

extension
COM moves upward and
balance

Question 23

what are the hip, knee, ankle and pelvis doing in this phase

Answer 23

pelvis: anterior rotation
hip: 120 flexion to full extension
knee: 100 flexion to full extension
ankle: 5 DF

Question 24

what does the EMG of the lower leg look like for extension phase

Answer 24

get most soleus activity, and some GN. Also, the tibialis anterior is calming down

Question 25

what does the EMG of the upper leg look like during the extension phase

Answer 25

the quads start strong, then back off. need to be strong to stand, but then rest on passive structures at the top. the glut. max is calming down, and the hamstrings are minimal activity. This is all to help with the extension and move the COM upward

Question 26

is the extension phase a phase in which there is a large displacement? also, it is a vertical or horizontal displacement

Answer 26

vertical displacement, and a lot, because we are standing all the way up

Question 27

what is the fourth phase of the sit to stand

Answer 27

stabilization phase

Question 28

what is the stabilization phase described as

Answer 28

end of hip extension and including postal sway

Question 29

what is the functional task of stabilization phase

Answer 29

weight bearing from hip to feet

Question 30

what are the critical events of stabilization phase

Answer 30

extension
COM upward
balance and ankle strategy

Question 31

what are the pelvis, hip, knee and ankle doing during the stabilization phase

Answer 31

the pelvis is neutral
hip: 120flexion to full extension
knee: 100 flexion to full extension
ankle 5DF 5PF

Question 32

what are some feedback styles we can use

Answer 32

tactile, visual, auditory, immediate, delayed summary

Question 33

what are the taxonomy of tasks

Answer 33

stability
mobility
open enviro 
closed enviro 
trail variability

Question 34

how can we practice?

Answer 34

part or whole.