Gluteal Region And Anterior/posterior Thigh: Origins And Insertions

Front 1

Gluteus Maximus

Back 1

O: lateral aspect of the ilium (PSIS) dorsal to the posterior gluteal line, the dorsal surface of the sacrum and coccyx, and from the sacrotuberous ligament

I: 3/4 into the IT band and the deep 1/2 into the gluteal tuberosity

Front 2

Piriformis

Back 2

O: from the pelvic surface of the sacrum

I: into the medial surface of the greater trochanter of the femur

Front 3

Gluteus Medius

Back 3

O: from the wing of the ilium, between the anterior and posterior gluteal lines

I: into the posterior aspect of the superior surface of the greater trochanter of the femur

Front 4

Gluteus Minimus

Back 4

O: from the wing of the ilium, between the anterior and inferior gluteal lines

I: into the anterior aspect of the superior surface of the greater trochanter of the femur

Front 5

Tensor Fascia Lata

Back 5

O: from the iliac crest, between the ASIS and the tubercle of the iliac crest

I: merges into the anterior aspect of the IT band

Front 6

Obturator Internus

Back 6

O: from the pelvic surface of the coxal bone, around the periphery of the obturator foramen, and from the obturator membrane

I: into the medial surface of the greater trochanter of the femur

Front 7

Superior Gemellus

Back 7

O: from the ischial spine

I: into the superior aspect of the obturator internus tendon

Front 8

Inferior Gemellus

Back 8

O: from the ischial tuberosity

I: into the inferior aspect of the obturator internus tendon

Front 9

Quadratus Femoris

Back 9

O: from the ischial tuberosity

I: into the quadrate tubercle and the vertical line extending inferiorly

Front 10

Semitendinosus

Back 10

O: from the ischial tuberosity via a common tendon with the long head of the biceps femorus

I: into the medial surface of the proximal/medial portion of the tibia via a common tendon with the sartorius and gracilis muscles (LES ANSERINUS)

Front 11

Semimembranosus

Back 11

O: via a long flat tendon from the ischial tuberosity

I: into the posteromedial aspect of the medial tibial condyle

Front 12

Biceps femoris: long head

Back 12

O: from the ischial tuberosity via a common tendon with the semitendinosus

I: into the fibular head

Front 13

Biceps femoris: short head

Back 13

O: from the lateral lip of the linea aspera and from the lateral intermuscular septum

I: into the fibular head

Front 14

Adductor magnus

Back 14

O: vertically oriented fiber from the ischial tuberosity

I: into the adductor tubercle

Front 15

Sartorius

Back 15

O: ASIS

I: into the proximal portion of the medial aspect of the tibia via the pes anserinus

Front 16

Rectus femoris

Back 16

O: straight head - AIIS; reflected head - lateral surface of the ilium just superior to the acetabulum

I: quadriceps/patellar tendon into the base of the patella into the patellar ligament into the tibial tuberosity

Front 17

Vastus Lateralis

Back 17

O: lateral surface of the femur from just distal to the greater trochanter and along the lateral lip of the linea aspera and the lateral intermuscular septum

I: quadriceps/patellar tendon into the base of the patella into the patellar ligament into the tibial tuberosity

Front 18

Vastus Medialis

Back 18

O: from the medial surface of the femur from just inferior to the intertrochanteric line and along the medial lip of the linea aspera

I: quadriceps/patellar tendon into the base of the patella into the patellar ligament into the tibial tuberosity

Front 19

Vastus Intermedius

Back 19

O: from the anterior surface of the shaft of the femur

I: quadriceps/patellar tendon into the base of the patella into the patellar ligament into the tibial tuberosity

Front 20

Iliopsoas: Iliacus

Back 20

O: from the pelvic surface of the iliac fossa

I: into the lesser trochanter of the femur

Front 21

Iliopsoas: psoas major

Back 21

O: from the superior and inferior edges of the vertebral bodies and intervening discs from T12-L4

I: into the lesser trochanter of the femur

Front 22

Pectineus

Back 22

O: from the pectin of the pubis

I: into the pectineal line of the femur

Front 23

Adductor Longus

Back 23

O: from the anterior aspect of the body of the pubis, just inferior to the pubic tubercle

I: into the middle 1/3 or so of the linea aspera, sandwiched between the adductor magnus and vastus medialis

Front 24

Adductor Brevis

Back 24

O: from the body and inferior ramus of the pubis

I: into the proximal 1/3 or so of the linea aspera

Front 25

Gracilis

Back 25

O: from the body and inferior ramus of the pubis

I: into the proximal portion of the medial aspect of the tibia via the pes anserinus

Front 26

Adductor Magnus

Back 26

O: from the inferior pubic ramus, the ischial ramus, and the ischial tuberosity

I: into the various points along the linea aspera

Front 27

Obturator Externus

Back 27

O: from the external surface of the obturator membrane and the periphery of the obturator foramen

I: into the trochanteric fossa