Knee Flexors

Question 1

What is the origin,insertion and action for bicep femoris

Answer 1

Origin - Long head - inferomedial part of upper area of ishchial tuberosity
Short head - lateral lip of linea aspera (lateral supra condylar ridge)
Insertion - head of fibula
Action - flexion and lateral rotation

Question 2

What is the origin,insertion and action semitendinosus

Answer 2

Origin - inferomedial part of upper ischial tuberosity
Insertion - medial surface of proximal tibia
Action - flexion and medial rotation

Question 3

What is the origin,insertion and action for Semimembranosus

Answer 3

Origin - superolateral impression ischial tuberosity
Insertion - groove and adjacent medial and posterior surface medial tibial condyle
Action - flexion and medial rotation