Muscle, Innervation, Origin and Insertion of Thigh Flashcards
Muscles of Anterior Thigh (8)
Iliacus m. Psoas major m. Vastus lateralis m. Vastus intermedius m Vastus medialis m. Rectus femoris m. Sartorius m. Articularis genu m.
Muscles of Medial Thigh (5)
Adductor magnus m. (both parts) Adductor longus m. Adductor brevis m. Pectineus m. Gracilis m.
Muscle of the Posterior Thigh (3)
Biceps femoris m.
Semitendinosus m.
Semimembranosus m.
Muscles of the Gluteal Region (10)
Gluteus maximus m. Gluteus medius m. Gluteus minimus m. Tensor fascia latae m. Piriformis m. Superior gemellus m. Inferior gemellus m. Quadratus femoris m. Obturator externus m. Obturator internus m.
Gluteus maximus m.
A: Extend thigh and assist in lateral rotation.
O: Posterior ilium
I: Gluteal tuberosity and IT band.
N: Inferior gluteal n.
Gluteus medius m.
A: Abduct and medially rotate thigh.
O: Ilium
I: Greater trochanter
N: Superior gluteal n.
Gluteus minimus m.
A: Abduct and medially rotate thigh.
O: Ilium
I: Greater trochanter
N: Superior gluteal n.
Tensor fascia latae m.
A: Tense the IT band.
O: Iliac spine and iliac crest
I: IT band to lateral tibial condyle
N: Superior gluteal n.
Piriformis m.
A: Laterally rotate extended thigh, abduct flexed thigh, stabilize femoral head.
O: Anterior surface of sacrum.
I: Greater trochanter
N: N. to piriformis m.
Superior gemellus m.
A: Laterally rotate extended thigh, abduct flexed thigh, stabilize femoral head.
N: N. to obturator internus m.
Inferior gemellus m.
A: Laterally rotate extended thigh, abduct flexed thigh, stabilize femoral head.
N: N. to quadratus femoris m.
Quadratus femoris m.
A: Laterally rotate thigh and stabilize femoral head.
N: N. to quadratus femoris m.
Obturator externus m.
A: Laterally rotate thigh and stabilize femoral head.
N: Obturator n.
Obturator internus m.
A: Laterally rotate extended thigh, abduct flexed thigh, stabilize femoral head.
N: N. to obturator internus m.
Psoas major m.
A: Sidebend vertebral column. Flex trunk.
O: T12-L5
I: Lesser trochanter
N: Lumbar plexus L1-3
Iliacus m.
A: Flex thigh and stabilize hip joint.
O: Superior iliac fossa, ala of sacrum.
I: Lesser trochanter of femur. Psoas major m..
N: Femoral n.
Sartorius m.
A: Flex, abduct, laterally rotate thigh. Flex leg at knee.
O: ASIS
I: Pes anserinus
N: Femoral n.
Rectus femoris m.
A: Extend leg at knee. Assist in thigh flexion.
O: Ilium
I: Tibial tuberosity
N: Femoral n.
Vastus lateralis m.
A: Extebd leg at the knee.
O: Greater trochanter
I: Tibial tuberosity
N: Femoral n.
Vastus intermedius m.
A: Extend leg at knee.
O:Anterior and lateral part of femoral body.
I: Tibial tuberosity
N: Femoral n.
Vastus medialis m.
A: Extend leg at knee.
O: Intertrochanteric line, linea aspera.
I: Tibial tuberosity
N: Femoral n.
Articularis genu m.
A: Tightens capsule during knee extension.
N: Femoral n.
Pectineus m.
A: Adduct and flex thigh.
O: Superior pubic ramus
I: Pectineal line of femur
N: Femoral n.
Adductor longus m.
A: Adduct thigh
O: Body of pubis
I: Linea aspera
N: Anterior division of obturator n.
Adductor brevis m.
A: Adduct thigh
O: Body of pubis
I: Pectineal line and proximal linea aspera
N: Anterior division of obturator n.
Adductor magnus m.
A: Adduct, flex (upper) and extend (lower) thigh.
O: Isciopubic ramus and ischial tuberosity
I: Gluteal tuberosity, linea aspera, muedial supracondylar line, adductor tubercle.
N: Posterior division of obturator n. and Tibial division of sciatic n.
Gracilis m.
A: Adduct thigh and assist in medial rotation. Flex leg.
O: Body of pubis
I: Pes anserinus
N: Anterior division of obturator n.
Biceps femoris m.
A: Flex leg and laterally rotate leg when flexed. Long head extends thigh.
O: Ischial tuberosty and linea aspera.
I: Lateral aspect of fibular head.
N: Tibial division of sciatic n. (LH) and common fibular division of sciatic n. (SH)
Semitendinosus m.
A: Extend thigh.
O: Ischial tuberosity.
I: Pes anserinus.
N: Tibial division of sciatic n.
Semimembranosus m.
A: Extend thigh
O: Ischial tuberosty
I: Medial tibial condyle
N: Tibial division of sciatic n.
