Bony Surfaces

Question 1

What is the Q angle?

Answer 1

Angle between the quadriceps and the patella tendon
Measured as angle between ASIS to centre of patella and line from centre of patella to tibial tuberosity
Represents angle of quadriceps muscle force
Normal angle is 13 degrees in men and 18 in women

Question 2

Difference between valgus and Varus

Answer 2

Varus- air inbetween

Question 3

Meniscial function

Answer 3

Enhances tibio remora, joint stability by deeping articular surface
Act as shock absorbers
Conforms to changing shape of femoral condyles during knee movement

Outer borders thick and vascular
Inner borders thin and avascular

Question 4

Patellar function

Answer 4

Improves the mechanical efficiency of the quadriceps muscle group by increasing lever arm and increasing angular torque

Question 5

Patello femoral joint stability depends on

Answer 5

Patella position
Lateral femoral buttress wall
Tightness of lateral retinaculum
Ration between vmo and vl

Question 6

What is a sesamoid bone?

Answer 6

Embedded tendons that help to glide over bony surfaces