EXAM 3 LECTURES UPDATED ACTUAL
QUESTIONS WITH CORRECT ANSWERS
Question 1.
GRF is directed posteriorly
ANSWER
braking force
Question 2.
GRF is directed anteriorly
ANSWER
accelerating force
Question 3.
moments produced by muscles and other internal structures around the joint
ANSWER
Internal Moments
Question 4.
moments produced by external forces such as gravity, GRF
ANSWER
External Moments
Question 5.
internal forces are equal and opposite of the calculated external moments
ANSWER
Equilibrium
,Question 6.
when accelerations of body segments occur
ANSWER
Unbalanced moments
Question 7.
identify only the "supportingness" of the muscle group
Do not indicate if muscle is shortening (concentric) or lengthening (eccentric)
ANSWER
Moments
Question 8.
What side of the joint this line passes on indicates external and internal moments
ANSWER
GRF
Question 9.
GRF passing posterior to the knee joint center
What are the external and internal moments?
ANSWER
external knee flexion moment & internal knee extension moment
,Question 10.
GRF passing posterior to the ankle joint center
What is the external moment?
ANSWER
external ankle plantarflexion moment
Question 11.
At initial contact/foot flat - how are hip extensors contracting?
ANSWER
isometrically
Question 12.
At foot flat - how are knee extensors contracting?
ANSWER
eccentrically
Question 13.
At midstance - how are hip flexors contracting?
ANSWER
eccentrically
, Question 14.
At heel off - how are hip flexors contracting?
ANSWER
concentrically
Question 15.
At terminal swing - how are knee flexors contracting?
ANSWER
eccentrically
Question 16.
At heel off - how are plantarflexors contracting?
ANSWER
concentrically
Question 17.
At midstance - how are plantarflexors contracting?
ANSWER
eccentrically
Question 18.
At initial contact/foot flat - how are dorsiflexors contracting?
ANSWER
eccentrically
Question 19.
At toe off - how are dorsiflexors contracting?
ANSWER
concentrically/isometrically
QUESTIONS WITH CORRECT ANSWERS
Question 1.
GRF is directed posteriorly
ANSWER
braking force
Question 2.
GRF is directed anteriorly
ANSWER
accelerating force
Question 3.
moments produced by muscles and other internal structures around the joint
ANSWER
Internal Moments
Question 4.
moments produced by external forces such as gravity, GRF
ANSWER
External Moments
Question 5.
internal forces are equal and opposite of the calculated external moments
ANSWER
Equilibrium
,Question 6.
when accelerations of body segments occur
ANSWER
Unbalanced moments
Question 7.
identify only the "supportingness" of the muscle group
Do not indicate if muscle is shortening (concentric) or lengthening (eccentric)
ANSWER
Moments
Question 8.
What side of the joint this line passes on indicates external and internal moments
ANSWER
GRF
Question 9.
GRF passing posterior to the knee joint center
What are the external and internal moments?
ANSWER
external knee flexion moment & internal knee extension moment
,Question 10.
GRF passing posterior to the ankle joint center
What is the external moment?
ANSWER
external ankle plantarflexion moment
Question 11.
At initial contact/foot flat - how are hip extensors contracting?
ANSWER
isometrically
Question 12.
At foot flat - how are knee extensors contracting?
ANSWER
eccentrically
Question 13.
At midstance - how are hip flexors contracting?
ANSWER
eccentrically
, Question 14.
At heel off - how are hip flexors contracting?
ANSWER
concentrically
Question 15.
At terminal swing - how are knee flexors contracting?
ANSWER
eccentrically
Question 16.
At heel off - how are plantarflexors contracting?
ANSWER
concentrically
Question 17.
At midstance - how are plantarflexors contracting?
ANSWER
eccentrically
Question 18.
At initial contact/foot flat - how are dorsiflexors contracting?
ANSWER
eccentrically
Question 19.
At toe off - how are dorsiflexors contracting?
ANSWER
concentrically/isometrically
