1.10Gluteal and Posterior Thigh

Question 1

-lateral aspect of fascia lata thickens to form this, which connects gluteus maximus to lateral leg

Answer 1

iliotibial tract

Question 2

function of superficial gluteal muscles?

Answer 2

resist gravity, exert tension on fascia lata

Question 3

• largest skeletal muscle
• origin: dorsal sacroiliac, sacrotuberous ligaments, ilium
• inserts: iliotibial track, gluteal tuberosity of femur
• innervation: inferior gluteal nerve
• extends and laterally rotates hip join, used when rising from sitting position, climbing stairs

Answer 3

gluteus maximus

Question 4

trochanteric: b/w gluteus maximus and greater trochancter, ischial: b/w ischial tuberosity and skin when sitting, gluteofemoral: b/w iliotibial track and vastus lateralis

Answer 4

gluteal bursae

Question 5

• from posterio-lateral surface of ilium to lateral surface of greater trochanter
• abducts and medially rotates thigh
• bears body weight when opposite limb swinging forward (prevents pelvic drop)
• innervated by superior gluteal nerve

Answer 5

gluteus medius and minimus

Question 6

• extends to iliotibial track
• flexor and abductor of thigh
• innervated by superior gluteal nerve

Answer 6

tensor of fascia lata and iliotibial track

Question 7

• arises on anterior surface of sacrum and sacrotuberous ligament
• emerges through greater sciatic foramen
• attaches to superior greater trochanter
• divides superior and inferior gluteal regions
• innervated by L5, S1, S2

Answer 7

piriformis

Question 8

small lateral rotators, obturator internus exit pelvis through lesser sciatic foramen

Answer 8

superior gemellus, obturator internus, inferior gemellus, quadratis femoris

Question 9

What are the 3 posterior thigh muscles?

Answer 9

semitendinous, semimembranous, biceps femoris

Question 10

Where do hamstring muscles arise from? Where does short head of biceps originate from?

Answer 10

ischial tuberosity, femur

Question 11

Function of posterior thigh muscles?

Answer 11

extend thigh at hip joint, flex leg at knee (not simultaneously)

Question 12

Innervation of posterior thigh muscles?

Answer 12

tibial nerve (short head of biceps via common fibular)