Thigh Muscles - Post

Question 1

What are these mucles

Answer 1

• flexors

- hamstrings

Question 2

What characterizes them as hamstrings

Answer 2

between ischial tuberosity and tibia/fibula

Question 3

Biceps femoris: origin, insertion, innervation, & function

Answer 3

Origin: long head - inferomedial ischial tuberosity; short head - lat. lip of linea aspera
Insertion: lat. head of fibula
Innervation: long head - tibial part sciatic n.; short head - common fibular part sciatic n.
Function: flex + lat. rotate leg @ knee joint + extend + lat rotate thigh @ hip joint

Question 4

Semitendinosus: origin, insertion, innervation, & function

Answer 4

Origin: postermedial ischial tuberosity
Insertion: pes anserinus
Innervation: tibial part sciatic n.
Function: flex + med. rotate leg @ knee joint + extend + med. rotate thigh @ hip joint

Question 5

Semimembranosus: origin, insertion, innervation, & function

Answer 5

Origin: superolateral ischial tuberosity
Insertion: medial tibial condyle
Innervation: tibial part sciatic n.
Function: flex + med. rotate leg @ knee joint + extend + med. rotate thigh @ hip joint

Question 6

Pes Anserinus - what is it, what does it provide

Answer 6

• fusion of gracilis, semitendinosus and sartorius tendons

- gives dynamic stability to med knee bc attaches posterior to the med-lat axis of knee rotation