Muscles of the Lower Limb

zicoxelu's version from 2017-09-12 13:01


Question Answer
Sartorius-attachSuperior part of medial surface of tibia
Sartorius-innervationFemoral nerve
Sartorius-actionFelxes, abducts and laterally rotates thigh at hip, flexes leg at knee

Tensor Fascia Lata

Question Answer
Tensor Fascia Lata-originASIS and iliac crest
Tensor fascia lata-insertioniliotibial tract
Tensor fascia lata-innervationsuperior glutea; nerve
Tensor fascia lata- actionsAbducts, medially rotates and flexes thigh


Question Answer
Iliacus-originIliac crest, iliac fossa, ala of sacrum and anterior sacroiliac ligaments
Iliacus-insertiontendon of psoas major, lesser trochanter
Iliacus-innervationFemoral nerve
Iliacus-actionFlex thigh at hip

Psoas Major

Question Answer
Psoas Major-originSides of T12-L5 transverse processes
Psoas Major-innervationVentral rami of lumbar nerves
Psoas Major-actionFlex thigh at hip


Question Answer
Pectineus-originSuperior ramus of pubis
Pectineus-insertionPectineal line of femur
Pectineus-innervationFemoral nerve
Pectineus-actionAdducts and flexes thigh, medial rotation of thigh

Quadriceps Femoris (all)

Question Answer
Rectus Femoris-originAIIS and ilium superior to acetabulum
Vastus Lateralis-originGreater trochanter and lateral lip of linea aspera of femur
Vastus Medialis-originIntertrochanteric line and linea aspera
Vastus Intermedius-originAnterior and lateral surfaces of body of femur
Quadriceps Femoris-insertbase of patella and by patella ligament to tibial tuberosity
Quadriceps Femoris-innervationFemoral nerve
Quadriceps Femoris-axtionExtend leg at knee

Adductor Longus

Question Answer
Adductor Longus-originbody of pubis inferior to pubic crest
Adductor Longus-insertionmiddle third of linea aspera of femur
Adductor Longus-innervationobturator nerve, branch of anterior division
Adductor Longus-actionAdducts thigh

Adductor Brevis

Question Answer
Adductor Brevis-originBody and inferior ramus of pubis
Adductor Brevis-insertionPectineal line and proximal part of linea aspera of femur
Adductor Brevis-innervationObturator nerve
Adductor Brevis-actionAdducts thigh and to some extent flexes it

Adductor Magnus

Question Answer
Adductor Magnus-origin (ADDUCTOR part)Inferior ramus of pubis, ramus of ischium
Adductor Magnus-origin (HAMSTRINGS part)Ischial tuberosity
Adductor Magnus-insertion (ADDUCTOR part)Gluteal tubrosity, linea aspera and medial supracondylar line
Adductor Magnus-innervation (ADDUCTOR part)Obturator nerve
Adductor Magnus-action (ADDUCTOR part)Adducts and flexes thigh
Adductor Magnus-insertion (HAMSTRINGS part)Adductor tubercle of femur
Adductor Magnus-innervation (HAMSTRINGS part)Tibial part of sciatic nerve
Adductor Magnus-action (HAMSTRINGS part)Adducts and extends thigh


Question Answer
Gracillis-originBody and inferior ramus of pubis
Gracillis-insertionSuperior part of medial surface of tibia
Gracillis-innervationObturator nerve
Gracillis-actionAdducts thigh, flexes leg and helps rotate leg medially

Obturator Externus

Question Answer
Obturator externus-originMargins of obturator foramen and obturator membrane
Obturator externus-insertionTrochanteric fossa of femur
Obturator externus-innervationObturator nerve
Obturator externus-actionLaterally rotates thigh

Gluteus Maximus

Question Answer
Gluteus Maximus-originIlium, dorsal surface of sacrum and coccyx and sacrotuberous ligament
Gluteus Maximus-insertionGluteal tuberosity of femur and iliotibial tract
Gluteus Maximus-innervationInferior gluteal nerve
Gluteus Maximus-actionExtends and laterally rotates thigh at hip

Gluteus Medius

Question Answer
Gluteus Medius-originExternal surface of ilium between anterior and posterior gluteal lines
Gluteus Medius-insertionGreater trochanter (lateral surface)
Gluteus Medius-innervationSuperior gluteal nerve
Gluteus Medius-actionAbducts and medially rotates thigh

Gluteus Minimus

Question Answer
Gluteus Minimus-origin External surface of ilium between anterior and inferior gluteal lines
Gluteus Minimus-insertionGreater trochanter (anterior surface)
Gluteus Minimus-innervationSuperior gluteal nerve
Gluteus Minimus-actionAbducts and medially rotates thigh


Question Answer
Piriformis-originAnterior surface of sacrum
Piriformis-insertionGreater trochanter (superior border)
Piriformis-innervationBranches of ventral rami of S1 and S2
Piriformis-actionLaterally rotates extended thigh and abducts flexed thigh

Obturator Internus

Question Answer
Obturator Internus-originPelvic surface of obturator membrane and surrounding bone
Obturator Internus-insertionGreater trochanter (medial surface)
Obturator Internus-innervationn. Obturator Internus
Obturator Internus-action Laterally rotates extended thigh and abducts flexed thigh

Superior and Inferior Gemellus

Question Answer
Inferior Gemellus-originIschial tuberosity
Superior Gemellus-originIschial spine
Inf and Sup Gemellus-insertionMedial surface of greater trochanter (trochanteric fossa) of femur
Inferior Gemellus-innervationn. Quadratus femoris
Superior Gemellus-innervationn. Obturator internus
Inf and Sup Gemellus-actionLaterally rotates extended thigh and abducts flexed thigh

Quadratus Femoris

Question Answer
Quadratus Femoris-originIschial tuberosity
Quadratus Femoris-insertionQuadrate tubercle on intertrochanteric crest of femur
Quadratus Femoris-innervationn.Quadratus Femoris
Quadratus Femoris-actionLaterally rotates thigh


Question Answer
Semitendinosous-originIschial tuberosity
Semitendinosous-insertionMedial side of superior part of tibia
Semitendinosous-innervationSciatic nerve, tibial division
Semitendinosous-actionExtends thigh, Flexes leg and medially rotates when flexed


Question Answer
Semimembranosous-originIschial tuberosity
Semimembranosous-insertionPosterior part of medial condyle of tibia
Semimembranosous-innervationSciatic nerve, tibial division
Semimembranosous-actionExtends thigh, Flexes leg and medially rotates when flexed

Biceps Femoris

Question Answer
Biceps Femoris (long head)-originIschial tuberosity
Biceps Femoris (short head)-originLinea aspera and lateral supracondylar line of femur
Biceps Femoris (both heads)-attachmentLateral side of head of fibular
Biceps Femoris (long head)-innervationSciatic nerve, tibial division
Biceps Femoris (short head)-innervationCommon fibular division of sciatic nerve
Biceps Femoris (both heads)-actionFlexes and laterally rotates leg when knee is flexed, extends thigh