Posterior lower limb

Question 1

Superior gluteal artery

Answer 1

Branch of internal iliac
Through the greater sciatic foramen, superior to piriformis

Superficial—>G Max
Deep: travels b/w medius and minimus
-Superior branch: to TFL fossa
-Inferior branch: trochanteric fossa

Question 2

Inferior gluteal artery

Answer 2

branch of internal iliac
passes via greater sciatic foramen inferior to piriformis

1) Muscular–> g max and ischial tuberosity muscles
2) Anastomosic branches to cruciate
3) Branch to sciatic n.
4) coccygeal–>gmax and subcut coccyl region
5) Cutaneous–> accompany posterior femoral cutaneous n.

Question 3

Superior gluteal nerve

Answer 3

L4,5-S1

sacral plexus–>great sacral foramen above piriformis (w/ sup gluteal a and v.)
–>b/w medius and minimus
innervates medius, minimus, TFL

Question 4

Inferior gluteal n.

Answer 4

L5-S1,2

sacral plexus–>greater sciatic foramen anterior to piriformis–> directly into G max

Question 5

Sciatic nerve

Answer 5

L4,5-S1,2,3

Largest peripheral nerve of the body and sacral plexus
exits pelvis thru greater sciatic foramen –>passes anteriorly thru the piriformis –>superficial to deep lateral rotators–>posterior surface of magnus–>

Question 6

Tibial n

Answer 6

branch of sciatic n
innervates teh semi-m, semi-T, and LH of biceps femoris and ischiocondylar region of adductor magnus

anterior divisions of ventral rami of spinal nerves L4-S3

Question 7

Common fibular n

Answer 7

branch of sciatic n.
SH of biceps femoris

posterior divisions of ventral rami of spinal nerves L4-S2