Structures Of The Thigh

Front 1

Gluteus Maximus

Back 1

O: Ilium, sacrum, coccyx, sacrotuberous ligament
I: gluteal tuberosity, IT tract
In: Inferior gluteal nerve (L5,S1,S2)
A: extends and laterally rotates thigh, supports extended knee

Front 2

what emerges above the piriformis?

Back 2

superior gluteal vessels and nerves

Front 3

2 groups of vessels and nerves emerge inferior to piriformis,
1st group

Back 3

1. sciatic nerve (L4,5,S1,2,3)
2. Inferior gluteal nerve
3. Inferior gluteal artery and 4. vein (supply piriformis, obturator internus and gl. max)
5. Post. femoral cutaneous nerve

Front 4

group of 3 structure emerging below the piriformis

Back 4

1. Nerve to obturator internus (l5,S1,2)
2. Internal pudendal vessels
3. Pudendal nerve (S2,3,4)
emerge from greater sciatic foramen and run through lesser sciatic foramen

Front 5

Sciatic Nerve

Back 5

L4,5,S1,2,3
safe side- lateral, for injections
divides:
common peroneal (L4,5,S1,2)
Tibial (L4,5,S1,2,3)

Front 6

The only structure enetering the gluteal region via the lesser sciatic foramen

Back 6

obturator internus

Front 7

Gluteus Medius

Back 7

O: gluteal surface of ilium to
I: greater trochanter
In: superior gluteal
A: abducts and medially rotates thigh

Front 8

Gluteus Minimus

Back 8

O: gluteal surface of ilium to
I: anterior aspect of greater trochanter
In: superior gluteal
A: abducts and medially rotates the thigh

Front 9

Piriformis

Back 9

O: pelvic surface of sacrum to
I: greater trochanter
In: Sacral (S1-S2)
A: laterally rotates thigh

Front 10

Obturator Internus

Back 10

O:ischiopubic rami, obturator membrane to
I: greater trochanter
In: Nerve to obturator
A: Abducts and laterally rotates thight

Front 11

Superior glamellus

Back 11

O: Ischial spine to
I: obturator internus tendon
In: nerve to obturator internus
A: laterally rotates thigh

Front 12

Inferior glamellus

Back 12

O: Ischial tuberosity to
I: Obturator internus tendon
In: nerve to quadratus femoris
A: laterally rotates thigh

Front 13

Quadratis femoris

"the carpet" of the sciatic nerve

Back 13

ischial tuberosity to intertrochanteric crest
IN: nerve to quadratis femoris (L4,5,S1)
A: laterally rotates thigh

Front 14

Tensor Fascia Latae

Back 14

anterior superior iliac spine and outer lip of iliac crest to iliotibial tract
I: superior gluteal
A: flexes, abducts and medially rotates the thigh

Front 15

superior gluteal nerve

Back 15

-L4,L5,S1
-runs along with superior gluteal vessels thru greater sciatic foramen (sup to piriformis)
-between gluteus medius and minimus
-along with deep branch of superior gluteal artery
-Innervates gluteus medius, minimus, and tensor fasciae latae (all abductors of the hip)

Front 16

small lateral rotator muscles (stabilize the hip)

Back 16

1. quadratis femoris
2. obturator internus
3. superior glamellus
4.inferior glamellus
5. piriformis
6. obturator externus

Front 17

Gluteal arteries

Back 17

-superior and inferior gluteal arteries are branches of the internal iliac artery
-they supply the entire gluteal region, with the largest branches being muscular