Advanced Anatomy Unit 3 OIAIS

gluteus maximus muscle group

superficial gluteal

gluteus maximus origin

posterior gluteal line, sacrum, coccyx, sacrotuberous ligament

gluteus maximus insertion

iliotibial track, gluteal tuberosity

gluteus maximus nerve innervation

inferior gluteal nerve (posterior division L5, S1, S2)

gluteus maximus blood supply

inferior gluteal artery, superficial branch of superior gluteal artery

gluteus maximus action

extend, abduct, laterally rotate thigh at hip

gluteus medius muscle group

superficial gluteal

gluteus medius origin

between anterior and posterior gluteal lines

gluteus medius insertion

greater trochanter femur

gluteus medius nerve innervation

superior gluteal nerve (posterior division L4-S1)

gluteus medius blood supply

deep branch of superior gluteal artery

gluteus medius action

abducts and medially rotates thigh at hip, stabilizes thigh

gluteus minimis muscle group

superficial gluteal

gluteus minimis origin

between anterior and inferior gluteal lines

gluteus minimis insertion

greater trochanter femur

gluteus minimis nerve innervation

superior gluteal nerve (posterior division L4-S1)

gluteus minimis blood supply

main trunk and deep branch of superior gluteal artery

gluteus minimis action

abduct and medially rotate thigh at hip, stabilize thigh

tensor fascia lata muscle group

superficial gluteal

tensor fascia lata origin

ASIS to tubercle of iliac crest

tensor fascia lata insertion

lateral condyle of tibia via iliotibial tract

tensor fascia lata nerve innervation

superior gluteal nerve (posterior division L4-S1)

tensor fascia lata blood supply

ascending branch of lateral circumflex femoral artery

tensor fascia lata action

flex, abduct, medially rotate thigh at hip, exerts tension on iliotibial tract

piriformis muscle group

superficial gluteal

piriformis origin

anterior surface of sacrum and sacrotuberous ligament

piriformis insertion

greater trochanter femur

piriformis nerve innervation

nerve to piriformis (posterior division S1-S2)

piriformis blood supply

superior and inferior gluteal arteries, internal pudenal artery

piriformis action

laterally rotates and abducts thigh

superior gemellus muscle group

deep gluteal

superior gemellus origin

ischeal spine

superior gemellus insertion

common tendon to greater trochanter femur

superior gemellus nerve innervation

nerve to obturator internus and superior gemellus (L5-S2)

superior gemellus blood supply

inferior gluteal and internal pudenal arteries

superior gemellus action

abducts thigh (flexed thigh), laterally rotates thigh (extended thigh)

obturator internus muscle group

deep gluteal

obturator internus origin

pelvic surface obturator membrane, pubis, and ischium

obturator internus insertion

medial surface greater trochanter femur

obturator internus nerve innervation

nerve to obturator internus and superior gemellus (L5-S2)

obturator internus blood supply

internal pudenal and obturator arteries

obturator internus action

abduct thigh (flexed thigh), laterally rotate thigh (extended thigh)

inferior gemellus muscle group

deep gluteal

inferior gemellus origin

ischial tuberosity

inferior gemellus insertion

common tendon to greater trochanter femur

inferior gemellus nerve innervation

nerve to quadratus femoris and inferior gemellus (l4-S1)

inferior gemellus blood supply

medial circumfelx femoral artery

inferior gemellus action

abduct thigh (flexed thigh), laterally rotate thigh (extended thigh)

quadratus femoris muscle group

deep gluteal

quadratus femoris origin

lateral border ischeal tuberosity

quadratus femoris insertion

quadrate tubercle of intertrochanteric crest

quadratus femoris nerve innervation

nerve to quadratus femoris and inferior gemellus (L4-S1)

quadratus femoris blood supply

medial circumflex femoral artery

quadratus femoris action

laterally rotates thigh

semimembranosus muscle group

posterior femoral (hamstring)

semimembranosus origin

ischeal tuberosity

semimembranosus insertion

medial tibial condyle

semimembranosus nerve innervation

tibial portion of sciatic nerve (anterior division L5-S2)

semimembranosus blood supply

perforating branch of deep femoral, medial circumflex femoral, and superior medial genicular artery

semimembranosus action

extend thigh, flex leg

semitendinosus muscle group

posterior femoral (hamstring)

semitendinosus origin

ischial tuberosity

semitendinosus insertion

medial surface proximal tibia, pes anserine

semitendinosus nerve innervation

tibial portion sciatic nerve (L5-S2, anterior division)

semitendinosus blood supply

perforating branch of deep femoral, meidal circumflex femoral, superior medial genicular arteries

semitendinosus action

extend thigh and flex leg

biceps femoris long head muscle group

posterior femoral (hamstrings)

biceps femoris long head origin

ischial tuberosity

biceps femoris long head insertion

head of fibula, lateral condyle tibia

biceps femoris long head nerve innervation

tibial portion sciatic nerve (L5-S2)

biceps femoris long head blood supply

perforating branch deep femoral, medial circumflex femoral, inferior gluteal, and superior lateral genicular arteries

biceps femoris long head action

flex and laterally rotate leg, extend thigh

biceps femoris short head muscle group

posterior femoral

biceps femoris short head origin

linea aspera femur, lateral supracondylar line

biceps femoris short head insertion

head of fibula, lateral condyle tibia

biceps femoris short head nerve innervation

common fibular portion sciatic nerve (posterior division L5-S2)

biceps femoris short head blood supply

perforating branch deep femoral, medial circumflex femoral, inferior gluteal, superior lateral genicular artery

biceps femoris short head action

flex and laterally rotate leg, extend thigh

pectineus muscle group

medial adductor femoral

pectineus origin

superior ramus pubis

pectineus insertion

pectineal line femur

pectineus nerve innervation

femoral nerve (posterior division L2-L4)

pectineus blood supply

medial circumflex femoral and obturator arteries

pectineus action

flex and adduct thigh

adductor longus muscle group

medial adductor femoral

adductor longus origin

body of pubis (inferior to pubic crest)

adductor longus insertion

linea aspera femur

adductor longus nerve innervation

obturator nerve (anterior branch L2-L4)

adductor longus blood supply

deep femoral and medial circumflex femoral arteries

adductor longus action

adduct thigh

adductor brevis muscle group

medial adductor femoral

adductor brevis origin

body and inferior ramus pubis

adductor brevis insertion

linea aspera femur and pectineal line

adductor brevis nerve innervation

obturator nerve (anterior branch L2-L4)

adductor brevis blood supply

deep femoral, medial circumflex femoral, superior lateral genicular arteries

adductor brevis action

adducts thigh, weak hip fIexion

gracilis muscle group

medial adductor femoral

gracilis origin

body and inferior ramus pubis

gracilis insertion

medial proximal tibia, pes anserinus

gracilis nerve innervation

obturator nerve (posterior branch L3-L4)