Hope it will be helpful to all. Thanks.

1. Muscles of Sacral region
Origin, Insertion, Nerve supply & Action
Abid Hasan Khan

2. Presented by
Abid Hasan Khan
Year: 2nd
Session: 2015-16
Department of Physiotherapy
Bangladesh Health Professions Institute (BHPI),
CRP- Chapain, Savar, Dhaka – 1343.
Abid Hasan Khan

3. Sacral Muscles
• Piriformis
• Iliacus
• Coccygeus
Abid Hasan Khan

4. Piriformis
Origin: Internal surface of sacrum,
sacrotuberous ligament.
Insertion: Upper border of greater
trochanter.
Nerve supply: Laterally rotates thigh,
abducts thigh.
Action: Assists with lateral rotation and
abduction of the thigh.
Abid Hasan Khan

5. Iliacus
Origin: Upper two-thirds of iliac fossa,
the upper surface of the lateral part of the sacrum
and adjacent ligaments, anterior inferior iliac spine.
Insertion: Onto tendon of psoas major, which
Continues into lesser trochanter of femur (together the
two muscles form the iliopsoas).
Nerve supply: Femoral nerve (L2, L3).
Action: Flexion of thigh at hip, assists in extension
of the lumbar spine.
Abid Hasan Khan

6. Coccygeus
Origin: The triangular muscle arises by
its apex from the spine of ischium.
Insertion: The base of the triangular
muscle is inserted into the margin of
the coccyx and into the side of the
lowest piece of the sacrum.
Nerve supply: Coccygeus is innervated
by a branch of fourth and fifth sacral
nerves.
Action: pulls coccyx forward after defecation,
closing in the back part of the outlet of the
Pelvis.
Abid Hasan Khan

7. Thank You
Abid Hasan Khan