Anatomy 1 Lecture 13 - Gluteal Region

• Superior: Ilaic crest
• Medial: Sacrum and Coccyx
• Inferior: sacrotuberous and iscial tuberosity
• Lateral: Greater trochanter

• Superior cluneals (dorsal rami first 3 lumbar nerves)
• Middle cluneals (dorsal rami of first 3 sacral nerves)
• Inferior cluneals (posterior femoral cutaneous which is a branch of the sacral plexus which comes off the primary ventral rami)
• branches of subcostal, iliohypogastric and lateral femoral cutaneous may also reach the area.
• 

Abduction and lateral rotation of the thigh

• It prevents nutation (anterior tipping of the sacrum)
• From the posterior inferior iliac spine, sacrum and coccyx to the ischila tuberosity

It extends from the sacrum and coccyx to the ischial spine. It is anterior to the sacotuberous ligament.

They help to turn the sciatic notches into the sciatic foramina.

• O: Ilium posterior to the posterior gluteal line, sacrum and sacrotuberous ligaments
• I: Gluteal tuberosity of the femur and the iliotibial band.
• N: inferior gluteal n. (comes out below the piriformis in the greater sciatic notch)
• A: Extends teh thigh when running and climbing, also Abducts and Ex. Rotates the thigh

• O: Pelvic surface of the sacrum (inside)
• I: greater trochanter
• N: Nerve to piriformis
• A: Lateral rotation and extension of thigh (there is some debate as to what it really does)

• O: Ilium between iliac crest and superior gluteal line
• I: greater trochanter
• N: Superior gluteal n.
• A: Abduct and internally rotates the thigh

• O: Obturator membrane
• I: Greater trochanter
• N: n. to obturator internus
• A: Laterally rotates and extends thigh

• O: Ischial Spine
• I: Greater Trochanter
• N: n. to obturator internus
• A: Laterally rotates and extends thigh

• O: Ischial tuberosity
• I: greater trochanter
• N: n. to quadratus femoris
• A: laterally rotates and extends thigh

• O: Ischial tuberosity
• I: intertrochanteric crest
• N: n. to quadratus femoris
• A: Laterally rotates and extends thigh

• O: Ilium between the superior and inferior gluteal lines
• I: Greater trochanter
• N: superior gulteal
• A: Abduct and medially rotate the thigh

• O: obturator membrane
• I: Trochanteric fossa
• N: Obturator n.
• A: Adduct and laterally rotate the thigh

• O: Iliac crest
• I: Iliotibial band
• N: Superior gluteal n.
• A: Abducts and flexes thigh
• (tension in the IT band)

• Through the greater sciatic foramen
• The glut max, med, mini, and TFL

Exit through the greater sciatic foramen to the piriformis and enter deep surface of the gluteal maximus. The glut max is inervated by the inferior, and not the superior gluteal. The superior gluteal innervates the med, min and TFL.

Through the greater sciatic notch. They supply the muscles of the posterior compartment

Runs medial to the sciatic n. Supplies cutaneous information to the posterior thigh.

• Exits the creater sciatic foramen and passes immediately into the lesser sciatic foramen.
• Supplies motor innervation to the obturator internus nad superior gemellus.

They exit through the greater sciatic foramen and pass immediately into the lesser sciatic foramen just medial to the nerve to the obturator internus

Exits the greater sciatic foramen inferior to the piriformis and descends anterior to the obturator internus and gemelli muscles. Innervates the inferior gemellus and quadratus femoris muscles.