Stress
Anger
Death
Moose
Brick
100
What muscle contractions are occurring during PSw?
concentric HFLs (FL hip to 10 degrees EXT)
eccentric quads (control the rate of knee EXT)
concentric PFs (PF the ankle and FL the knee)
100
What is the position of the GRF at the hip, knee, and ankle during EMSt?
hip: posterior
knee: posterior
ankle: anterior
100
True or false? During weight bearing supination, the STJ axes are no longer parallel and the knee is locked in the screw home mechanism.
true
100
What are the bones of the lateral column?
cuboid, metatarsals 4/5
100
Interpret hip at PSw w.r.t. functional tasks
Concentric power burst begins swing limb advancement
200
Does LR occur in SLS or DLS?
DLS
200
True or false? Navicular drop is a sign of weakness in the evertor muscles.
false- navicular drop is a sign of invertor muscle weakness (overly everted, pronated, collapsed arch, dropped navicular)
200
At which subphase of gait is the hip at its maximal posterior rotation?
a) IC
b) LR
c) MSt
d) TSt
d) TSt
200
Which muscles are on for TSw?
Concentric quads, concentric then eccentric hams, isometric DFors
200
When and why is extensor digitorum longus activated?
ISw to dorsiflex & evert the ankle
300
What is the position of the GRF at the hip, knee, and ankle during LMSt?
hip: posterior
knee: anterior
ankle: anterior
300
What occurs during closed chain pronation at the HF, MF, FF, ankle, and knee?
calcaneal EV
talar ADD/PF
forefoot ABD
tibial/fibular INT ROT
knee FL
300
Which of the following are purposes for hip rotation during gait?
a) maximizing stability
b) maximizing step length
c) minimizing stability
d) minimizing COM displacement
b and d
300
Concentric/eccentric actions of rectus femoris
Concentric - hip flexion, knee extension
Eccentric - controls the rate of hip extension, knee flexion
300
In which phase is the hip adducted?
Stance phase
400
What rocker is used during ISw?
n/a (swing phase)
contralateral 2nd rocker (ankle rocker)
400
True or false? The midfoot is unlocked during weight bearing pronation, while the knee is locked to maintain initial limb stability.
false- both the midfoot and knee are unlocked during pronation to facilitate shock absorption
400
True or false? Without hip rotation, the base of support is wider because the hips are further from midline. This makes for a more stable gait.
true (often the gait style for older people who need more stability- short steps with little rotation)
400
Explain the first rocker
Heel rocker (LR) - DFors fire eccentrically to control the rate of PFion until the foot is flat; then DFors fire concentrically to pull the tibia forward on the planted foot; quads fire eccentrically to pull the thigh over planted foot
400
When is GRF medial to the knee center?
MSt to TSt
500
What defines TSw in typical gait?
from MSw until just before the limb strikes the ground
500
What occurs during closed chain supination at the HF, MF, FF, ankle, and knee?
calcaneal INV
talar ABD/DF
forefoot ADD
tibial/fibular EXT ROT
knee EXT
500
True or false? During swing phase, the hip will be relatively abducted.
true
500
Explain the second rocker
Ankle rocker (MSt) - DFion ROM contributes to ankle rocker; ankle DFs to 5ยบ of DF
500
Which muscles are on for ISw?
Concentric hip flexors, concentric knee flexors, concentric DFors
