6. 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
17. 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 part
Q.Femoris / Inf.Gem.
Obt.Int.
Post.cut.nr.of thigh.
Piriformis
18.
19.
20.
21.
22. 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.