STS

Question 1

define sit to stand

Answer 1

moving body mass forward from large BOS to small c ext of LE to raise body over feet

Question 2

define sitting down

Answer 2

moving body mass down from small BOS to large c UE flexing forward and LE flexing to control descend

Question 3

true or false

sitting down is the reverse of standing up

Answer 3

false

Question 4

true or false

in sit to stand and sitting down HKA angular displacements are similar

Answer 4

true

Question 5

muscle activity during sit to stand

Answer 5

iliopsoas - initiates flexion of trunk

major ext force during thigh off - concentric of quads

Question 6

muscle activity during sitting down

Answer 6

eccentric control of extensors at HKA to control descent

Question 7

other considerations during sit to stand

Answer 7

momentum

Question 8

other considerations during sitting down

Answer 8

longer duration d/t lack of visual input

Question 9

phases of STS

Answer 9

pre-extension phase and extension phase

Question 10

discuss pre-extension phase of STS

Answer 10

feet moved post to knee

HAT flexion at hips

generation of horizontal linear momentum

Question 11

discuss extension phase of STS

Answer 11

conversion of horizontal linear momentum to vertical momentum

HKA ext - starts at knees

Question 12

critical components of STS

Answer 12

foot placed back ng 10 cm and 75° dflexion

flexion of extended HAT at hips

knee hip and ankle ext - at least 3/5 MMT

Question 13

mechanical requirements of STS

Answer 13

generation of horizontal and vertical momentum

generating and sustaining LE forces

postural stab at thighs-off

Question 14

discuss significance of foot placement in STS

Answer 14

dictates:
- the distance body has to move forward to pos COM over feet
- amount of muscle force of HKA

BOBATH: standing up 1 foot in front = inc loading on post foot

MRP: sabay

Question 15

discuss significance of timing and trunk rotation in STS

Answer 15

momentum from HAT is a major contributor to elicit proper ext of LE

inc hip flexion velocity or more horizontal momentum = dec force for LE ext

not too fast and slow: 1-2 secs dapat

Question 16

discuss significance of chair in STS

Answer 16

higher = easier to stand

dec arm rest to make sure LE contracts

Question 17

discuss significance of UE limbs for balance and propulsion in STS

Answer 17

BOBATH AND BRUNSS: RIP = hard to translate to vertical momentum and no supp

MRP: hands at lap lang

Question 18

problems in STS post-stroke

Answer 18

inability to stand indep

absent/insuff foot placement backward

dec projection of body forward in pre-extension phase

uncontrolled descent during sit

Question 19

causes of inability to stand indep post-stroke

Answer 19

LE muscle weakness and incoordination

diff timing and generation of LE force - unable to sustain force, burts only

lack of balance and stab

Question 20

causes of inability to absent/insuff foot placement backward post-stroke

Answer 20

weak hams and dflexors

tight soleus

sensory prob

Question 21

causes of dec projection of body forward in pre-extension phase in post-stroke

Answer 21

inadequate foot back

inability to stab paretic limb

assym WB on feet

flexion at spine

moving very slow

fear of falling

wide feet

Question 22

dec projection of uncontrolled descent in pre-extension phase

Answer 22

nag ccompensate UE

LE muscle weakness and incoordination

poor balance

sensory problems

Question 23

goals of rehab in training STS

Answer 23

prevent soft tissue shortening

inc LE activation, strength and coordination

promote safe, efficient and indep STS