Muscles of the Thigh Flashcards by Sam Bernard

Sartorius Origin

ASIS and notch below it

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Sartorius insertion

Proximal part of medial surface of the body of the tibia

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Sartorius innervation

Femoral nerve

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Sartorius function

Flex, abduct, and laterally rotate hip

Flex knee

Medially rotate leg from flexed position

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Quadriceps femoris insertion

Tibial tuberosity via patellar ligament

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Quadriceps femoris innervation

Femoral nerve

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Quadriceps femoris function

Extend knee

Rectus femoris is only quad to flex hip

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Rectus femoris origin

Aponeurosis of straight (from ASIS) and reflected (from above acetabulum) tendons

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Vastus lateralis origin

Lateral lip of linea aspera

Lateral lip of gluteal tuberosity

Anterior and inferior borders of the greater trochanter and proximal intertrochanteric line

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Vastus medialis origin

Distal intertrochanteric line

Medial intermuscular septum

Tendons of adductor longus and magnus

Medial lip of linea aspera

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Vastus intermedius origin

Proximal two-thirds of the anterior and lateral surfaces of the femur

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Articularis genu origin

Anterior surface of the distal femur

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Articularis genu insertion

Synovial membrane of the knee joint

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Articularis genu innervation

Femoral nerve

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Articularis genu function

draw synovium proximally

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Gracilis origin

Inferior half of the pubic symphysis, pubic body, and the superior half of the pubic arch (inferior pubic ramus)

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Gracilis insertion

Proximal part of the medial surface of the tibia in common with sartorius and semitendinosus

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Gracilis nerve supply

Anterior division of the obturator nerve

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Gracilis function

Adduct and medial rotate the hip

Flex knee

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Pectineus origin

Pecten pubis, the bone anterior to the pecten pubis between the pubic tubercle and iliopectineal eminence

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Pecineus insertion

Pectineal line

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Pectineus innervation

Femoral nerve

Sometimes accessory obturator or obturator

Pectineus function

Flex, adduct, and medially rotate hip

Obturator externus origin

Portions of ischium and pubis surrounding medial margin of the obturator foramen and from obturator membrane

Obturator externus insertion

trochanteric fossa of the femur

Obturator externus innervation

Posterior division of the obturator nerve

Obturator externus function

Adduct and laterally rotate hip

Adductor longus origin

Front of the body of the pubis

Adductor longus insertion

Medial lip of the linea aspera between vastus medialis and adductor magnus attachments

Adductor longus function

Flex and adduct the hip

Adductor longus innervation

Anterior brand of obturator nerve

Adductor brevis origin

Pubic body and inferior pubic ramus

Adductor brevis insertion

Proximal part of linea aspera

Adductor brevis innervation

Obturator nerve (usually anterior division)(

Adductor brevis function

Adduct and flex the hip

Adductor magnus origin

Inferior pubic ramus Ischial ramus Ischial tuberosity

Adductor magnus insertion

Gluteal tuberosity Linea aspera Medial supracondylar line Adductor tubercle of the femur

Adductor magnus innervation

Posterior division of the obturator nerve Tibial portion of the sciatic nerve

Adductor magnus functions

Adduct, flex, and extend hip

Long head of biceps femoris origin

Posterior part of the ischial tuberosity in common with semitendinosus Sacrotuberout ligament

Short head of biceps femoris origin

Lateral lip of linea aspera between adductor magnus and vastus lateralis

Biceps femoris insertion

Lateral side of the styloid process of the fibular head and lateral condyle of tibia

Long head of biceps femoris innervation

Tibial portion of sciatic nerve

Short head of biceps femoris innervation

Common fibular portion of the sciatic nerve

Biceps femoris function

Flex and laterally rotate knee Long head extends and laterally rotates hip

Semitendinosus origin

Posterior ischial tuberosity in common for 8 cm with biceps femoris

Semitendinosus insertion

Proximal part of the medial surface of tibia

Semitendinosus innervation

Tibial portion of sciatic nerve

Semitendinosus function

Flex and medially rotate knee Extend hip

Semimembranosus origin

Oblique line of ischial tuberosity above biceps femoris and semitendinosus

Semimembranosus insertion

Groove on medial surface of medial condyle of tibia Also continues to form the oblique popliteal ligament

Semimembranosus innervation

Tibail portion of sciatic nerve

Semimembranosus function

Flex and medially rotate knee Extend thigh