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Muscles of sacral region
- 1. Muscles of Sacralregion Origin, Insertion, Nerve supply & Action Abid Hasan Khan
- 2. Presented by Abid HasanKhan 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 surfaceof 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-thirdsof 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 triangularmuscle 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
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