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Origin/insertion, Function/actions, Nerve, Relationship

Psoas Major (attachments)

Origin: Anterior aspect of T12-L5
Insertion: Lesser trochanter

Psoas Major

Runs posterior to inguinal ligament to anterior aspect of the hip joint

Psoas major and iliacus (actions)

Hip flexion

Iliacus (attachments)

Origin: Superior iliac fossa, anterior sacrum
Insertion: Lesser trochanter

Psoas Major and Iliacus

common tendon on lesser trochanter

Femoral Nerve

Psoas Major, Iliacus, Sartorius, Rectus Femoris, VMO, Vastus Lateralis, Vastus Intermedius, Pectineus

Tensor Fascia Latae (TFL) (attachments)

Origin: lateral aspect of ASIS, anterior lateral lip of iliac crest
Insertion: IT band

IT band

Muscles: TFL, Glute Max
Insertion: Gerdy's Tubercle

TFL (actions)

Hip Flexion, internal rotation of hip, Abduction of hip, Knee extension

Sciatic Nerve

TFL, Glute Max, Glute Min, Glute Med, Piriformis, Gemelles Inferior and Superior, Obturator Internus, Quadratus Femoris, Biceps Femoris, Semimembranosus, Semitendinosus, Adductor Magnus

Glute Max (attachments)

Origin: medial to posterior line, dorsal sacrum, sacrotuberous ligament
Insertion: Gluteal tuberosity and IT band

Glute Max (actions)

Hip extension, external rotation of hip, Adducts and Abducts hip

Glute Med (attachments)

Origin: between posterior and anterior line and iliac crest
Insertion: lateral surface of greater trochanter

Glute Med (actions)

hip abduction, external and internal rotation of hip

Glute Min (attachments)

Origin: between anterior and inferior gluteal lines
Insertion: lateral anterior greater trochanter

Glute Min (actions)

abducts hip, internal rotation of hip

Glute Max

Most superficial Gluteal Muscle


Most superficial hip flexor and abductor

Glute Med

Deep to Glute max, superficial to Glute Min

Glute Min

Deepest Glute muscle

Piriformis (attachments)

Origin: Anterior sacrum and sacrotuberous ligament
Insertion: Superior greater trochanter


runs through GSN and superficial to Sciatic Nerve

Piriformis, Obturator internus, Gemellus Superior and Inferior (actions)

external rotation of hip, abduction only with hip flexion

Obturator Internus (attachments)

Origin: Pelvic surface of obturator foramen
Insertion: medial greater trochanter

Obturator Internus

Runs through LSN, Inferior to Gemellus Superior and superior to Gemellus Inferior

Gemellus Superior (attachments)

Origin: Ischial Spine
Insertion: medial greater trochanter

Obturator Internus, Gemellus Superior and Inferior

common tendon on medial greater trochanter

Gemellus Inferior (attachments)

Origin: Ischial tuberosity
Insertion: medial greater trochanter

Quadratus Femoris (attachments)

Origin: Ischial tuberosity
Insertion: Quadrate Femoris

Quadrate Femoris and Oberator Externus (actions)

external rotation of the hip

Obturator Externus (attachments)

Origin: anterior Obturator foramen
Insertion: intertrochanteric fossa

Obturator Externus

deepest external rotator

Obturator Nerve

Obturator Externus, Gracilis, Pectineus, Adductor Longus, Adductor Brevis, Adductor Magnus

Sartorius (attachments)

Origin: ASIS
Insertion: Pes Anserine


Superficial to Quads

Sartorius (actions)

hip flexion, hip abduction, hip external rotation, knee flexion and knee internal rotation

Rectus Femoris (attachments)

Origin: AIIS, rim above acetabulum
Insertion: patella tendon (tibial tuberosity)

Vastus Intermedius (attachments)

Origin: Anterior lateral proximal femur shaft, distal lateral lip of linea aspera
Insertion: patella tendon (tibial tuberosity)

Vastus Medialis (attachments)

origin: medial intertrochanteric line, spiral line, medial lip of linea aspera, medial supracondylar line
Insertion: patella tendon (tibial tuberosity)

Vastus Lateralis (attachments)

Origin: Lateral intertrochanteric line, anterior inferior borders of greater trochanter, lateral lip of gluteal tuberosity, lateral lip of linea aspera
Insertion: patella tendon (tibial tuberosity)

Rectus Femoris (actions)

knee extension and hip flexion

VMO, Vastus Lateralis and Intermedius (actions)

knee extension

Vastus Intermedius

Deepest Quad muscle

Vastus Lateralis

Superficial to Vastus Intermedius. Deep to IT Band.


Origin proximal to insertion of adductor longus and magnus.

Rectus Femoris

Most superficial Quad muscle

Biceps Femoris (attachments)

Origin: long head - ichial tuberosity, sacrotuberous ligament, short head - lateral lip of linea aspera, lateral supracondylar line
Insertion: lateral head of fibula and tibia

Biceps Femoris (actions)

Flexion of knee, extension of hip, lateral leg rotation

Biceps Femoris

proximally covered by Glute Max. Short head is covered by IT band. Long head is superficial to Semimembranosus and Adductor Magnus. Lateral to Semitendinosus.

Semitendinosus (attachments)

Origin: Ischial tuberosity
Insertion: Pes anserine

Semitendinosus (actions)

Flexion of knee, extension of hip, medial knee rotation

Semitendinosus and Biceps Femoris

common tendon from ischial tuberosity


Superficial to Semimembranosus. Medial to Biceps Femoris.

Semimembranosus (attachments)

Origin: ischial tuberosity
Insertion: posterior aspect of medial tibial condyle

Semimembranosus (actions)

Flexion of knee, extension of hip


Deep to Semitendinosus and Biceps Femoris. Posterior to Adductor Magnus.

Gracilis (attachments)

Origin: Body of pubis and pubis ramus
Insertion: Pes anserine

Gracilis (actions)

Flexion of knee, medial rotation of knee and hip adduction


most medial adductor muscle. Superficial to Adductor Magnus.


anterior to Adductor Magnus and Adductor Brevis. lateral to Adductor Longus. medial to Iliopsoas.

Pectineus (attachments)

Origin: pectineal line of pubis
Insertion: Pectineal line of femur

Pectinus (actions)

Hip flexion and adduction

Adductor Longus (attachments)

Origin: body of pubis
Insertion: medial lip of linea aspera

Adductor Longus and Adductor Brevis (actions)

Hip adduction

Adductor Longus

Superficial to Adductor Brevis and Magnus. Medial to Pectineus.

Adductor Brevis (attachments)

Origin: body of pubis
Insertion: spiral line, medial lip of linea aspera

Adductor Brevis

Deep to Adductor Longus. Superficial Adductor Magnus.

Adductor Magnus (attachments)

Origin: anterior fibers - inferior pubic ramus, middle fibers - ischial ramus, posterior fibers - ischial tuberosity
Insertion: anterior fibers - medial gluteal tuberosity, middle fibers - medial lip of linea aspera and medial supracondylar line, posterior fibers - adductor tubercle

Adductor Magnus (actions)

hip adduction and extension

Adductor Magnus

Posterior and deep to Adductor Longus, Brevis and pectineus. Anterior and superficial to Semitendinosus, Semimembranosus, Biceps Femoris and Glute Max. Lateral to Gracilis. Inferior to Quadratus Femoris and Obturatot Externus.

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