test 4 posterior thigh Flashcards Preview

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Flashcards in test 4 posterior thigh Deck (12):
1

Semitendinosus origin

Ischial tuberosity

2

Semitendinosus insertion

Medial surface of superior part of tibia

3

Semitendinosus innervation

Tibial division of sciatic nerve (L5, S1, S2)

4

Semitendinosus action

Extend thigh; flex leg and rotate it medially when knee is flexed; when thigh and leg are flexed, can extend trunk

5

Semimembranosusorigin

Ischial tuberosity

6

Semimembranosus insertion

Posterior part of medial condyle of tibia; reflected attachment forms oblique popliteal ligament (to lateral femoral condyle

7

Semimembranosus innervation

Tibial division of sciatic nerve (L5, S1, S2)

8

Semimembranosus action

Extend thigh; flex leg and rotate it medially when knee is flexed; when thigh and leg are flexed, can extend trunk

9

Biceps femoris,
long and short heads
origin

Long head: ischial tuberosity

Short head: linea aspera and lateral supracondylar line of femur

10

Biceps femoris,
long and short heads
insertion

Lateral side of head of fibula; tendon is split at this site by fibular collateral ligament of knee

11

Biceps femoris,
long and short heads
innervation

Long head: tibial division of sciatic nerve (L5, S1, S2)
Short head: common fibular division of sciatic nerve (L5, S1, S2)

12

Biceps femoris,
long and short heads
action

Flexes leg and rotates it laterally when knee is flexed; extends thigh (e.g., when starting to walk)