Origin – Ischial Tuberosity

Insertion – Bones of leg Tibia / Fibula

Supplied by Tibial division of Sciatic Nv.

Flexors of knee and extensors of Hip

Semitendinosus

Semimenranosus

Biceps Femoris

Ischial part of Adductor Magnus

BACK OF LEFT THIGH

Biceps Femoris

iLio tibial tract

Rt. Knee lat. Side

SACRAL PLEXUS – SCIATIC NERVE

Dorsal divisions

Ventral divisions

L4

L5

S1

S2

S3

Lumbosacral trunk

Superior gluteal

Inferior gluteal

Sciatic nerve

Common peroneal part

Tibial partQ.Femoris / Inf.Gem.

Obt.Int.

Post.cut.nr.of thigh.

Piriformis

Compression of nerve against femur

- Unusual stretching after sitting for long time “ Sleeping foot”

- Shooting pain along cutaneous distribution of sciatic nerve – begins in gluteal region; radiates to back of thigh, lateral side of leg, dorsum of foot.

- Compression of sciatic nerve by Osteoarhtitis, Lumbar disc prolapse, spondylolisthiasis, Fibrositis, Neuritis etc. penetrating wounds, dislocation / fracture of pelvis – foot drop and sensory loss.

VERTICAL LINE

HORIZONTAL LINE

HIGHEST P[OINT OFILIAC CREST

SAFE INJECTIONREGION

SCIATIC NERVE

ISCHIAL TUBEROSITY