Muscles Of The Gluteal Region

Question 1

Origin and insertion of gluteus maximus

Answer 1

• Origin: 1) Gluteal surface of the ilium behind the posterior gluteal line

2) Back of lateral mass of sacrum

3) Back of sacrotuberous ligament

• Insertion: 1) Deep ¼ into the gluteal tuberosity of the femur

2) Superficial ¾ into the posterior border of the Iliotibial tract

Question 2

Nerve supply of gluteus maximus

Answer 2

Inferior gluteal nerve (L5, S1 & S2)

Question 3

Action of gluteus maximus

Answer 3

• Powerful lateral rotator of the thigh
• Strong abductor of the thigh
• Main extensor of the hip joint especially when force is needed e.g running, rising from sitting position, climbing up the stairs
• Tightens Iliotibial tract which helps to extend the knees and steady femur on tibia

From below

• Helps raise body from stooping position (acting with hamstring)

Question 4

Mention structures deep to the gluteus maximus

Answer 4

Bony parts

Is greater trochanter going to ischial tuberosity?

• Back of ilium and spine
• Greater trochanter
• Gluteal tuberosity
• Ischial tuberosity
• Ligaments*
• Sacrotuberous ligament
• Sacrospinous ligament
• Back of capsule of hip joint
• Muscles

Other 2 gluteus muscles pray on adding quadri’s hamsters

• Gluteus minimus
• Gluteus maximus
• Piriformis
• Obturator internus + 2 gemellus muscles
• Ischial part of adductor magnus
• Quadratus femoris
• Origin of hamstring muscles from ischial tuberosity

Vessels (aa & vv)

• Superior gluteal vessels
• Inferior gluteal vessels
• Internal pudendal vessels

Nerves

• Sciatic nerve
• Nerve to obturator internus
• Nerve to quadratus femoris
• Post cutaneous nerve of thigh
• Pudendal nerve
• Superior & inferior gluteal nerve

Bursae

• Bursae on greater trochanter
• Bursa on ischial tuberosity
• Bursa on upper part of vastus lateralis muscle

Question 5

Origin & Insertion of Psoas major m

Answer 5

Origin: * Anterior & lateral borders of all the lumbar transverse processes
* Side bodies of the last thoracic vertebra and all lumbar vertebrae

Insertion
* Forms iliopsoas tendon with the iliacus and inserts into the greater trochanter.