Week 5 Posterior thigh Flashcards
proximal and distal attachment of semitendinous
proximal: ischial tuberosity
distal: superior part of medial surface of tibia (pes anserinus)
innervation of semitendinous
tibial division of sciatic nerve
main action of semitendinous
extend hip joint
flex knee joint
medially rotate it when flexed
muscles can extend trunk at hip joint
proximal and distal attachment of semimembranous
proximal: ischial tuberosity
distal: posterior surface of medial condyle of tibia
innervation of semimembranous
tibial division of sciatic nerve
main action of semimembranous
extend hip joint
flex knee joint
medially rotate it when flexed
proximal and distal attachment of long head biceps femoris
proximal: ischial tuberosity
distal: lateral side of head of fibula
proximal and distal attachment of short head biceps femoris
proximal: linea aspera and lateral supracondylar line of femur
distal: lateral side of head of fibula
innervation of long head biceps femoris
tibial division of sciatic nerve
innervation of short head biceps femoris
common fibular division of sciatic nerve
main action of long and short head biceps femoris
flexes knee joint
laterally rotates it when flexed
long head extends hip joint
sciatic nerve
- from sacral plexus to gluteal region
- supplies no muscles in gluteal region
- supplies all muscles of posterior compartment of thigh
- divided into
tibial and fibular division nervesat popliteal fossa
.
cutaneous innervation of the posterior thigh
dorsal rami L1-3, S1-3
posterior cutaneous nerve of the thigh
profunda femoris artery
- from femoral artery
- 4 perforating branches that supply posterior compartment
- gives rise to medial and lateral circumflex arteries
popliteal artery
- from adductor hiatus to fibrous arch in soleus
deepest in popliteal fossa- dividing anterior and posterior
tibial artery
