Rotators

Question 1

Semimembranosus MR

Answer 1

Origin: superolateral aspect of ischial tuberosity
Insertion: posteromedial surface of med tib condyle (crosses knee)

Innervation: Sciatic L5-S2

Med rots knee

Question 2

Semitendinosus MR

Answer 2

Origin: inferomedial aspect of ischial tuberosity
Insertion: anteromedial aspect of prox. Tibia

Innervation: Sciatic L5-S2

Med rots knee

Question 3

Sartorius MR

Answer 3

Origin: ASIS
Insertion: superomedial part of tibia (in front of semitend/grac)

Innervation: Femoral L2-3

Question 4

Popliteus MR

Answer 4

Origin: lat fem condyle
Insertion: prox surface of post tibia

Innervation: Tibial L4-S1

Unlocks ext knee, med rot knee

Question 5

Biceps Femoris LR

Answer 5

Origins: Long head- inferomedial aspect of ischial tuberosity
Short head- low1/2 of lat linea aspera, upp1/2 of lat supracondylar line of femur
Insertion: head of fibula

Innervation: Sciatic L5-S2

Only muscle to lat rot knee