Week 4 - The Knee Complex

Question 1

4 movements at the knee joint…

Answer 1

Extension
Flexion
Internal rotation
External rotation

Question 2

Three functions of the patella..

Answer 2

Reduces patella tendon friction
Protects anterior knee structures from trauma
Acts as lever (increases lever arm at quadriceps)

Question 3

(Quad) Rectus femoris origin and insertion action

Answer 3

Origin- Anterior inferior iliac spine
Insertion- tibial tuberosity

Action: extension

Question 4

(Quad) Vastus medialis origin insertion actions

Answer 4

Origin- medial condyl ridge of femur
Insertion- tibial tuberosity

Action: extension

Question 5

(Quad) Vastus lateralis origin insertion and action

Answer 5

Origin- greater trochanter of femur
Insertion- tibial tuberosity

Action: extension

Question 6

(Quad) Vastus intermedius origin insertion action

Answer 6

Origin- upper 2/3 of anterior surface of femur

Insertion- tibial tuberosity

Question 7

(Hams) Bicep femoris origin insertion action

Answer 7

Origin- LH= iscial tuberosity SH=lateral condyloid ridge of femur
Insertion- head of fib and medial surface of tib

Action: flexion

Question 8

(Hams) semitendinosus origin insertion actions

Answer 8

Origin- ishial tuberosity
Insertion- upper anterior medial surface of tibia

Action: flexion

Question 9

(Hams) semimembranosus origin insertion actions

Answer 9

Origin- ishial tuberosity

Insertion- posterior medial surface of medial tibial condyl

Question 10

Define active insufficiency

Answer 10

Muscle shortened to the point where it cannot generate or maintain active tension

Question 11

Define passive insufficiency

Answer 11

Opposing muscle stretched to the point it can no longer lengthen to allow movement

Question 12

What is the Q angle

Answer 12

Line of quads (ASIS) to midpoint of patella

Line of patella tendon

Question 13

Q angle for males and females

Answer 13

Males 12-13 degrees

Females 15-18 degrees