Anatomy Test 2 Lower Limb Muscles Flashcards
abductor digiti minimi (foot) origin
medial and lateral sides of the tuberosity of the calcaneus
abductor digiti minimi (foot) insertion
lateral side of the base of the proximal phalanx of the 5th digit
abductor digiti minimi (foot) action
abducts the 5th toe; flexes the metatarsophalageal joint
abductor digiti minimi (foot) innervation
lateral plantar nerve
abductor digiti minimi (foot) blood supply
lateral plantar a.
abductor hallucis origin
medial side of the tuberosity of calcaneus
abductor hallucis insertion
medial side of the base of the proximal phalanx of the great toe (hallux)
abductor hallucis action
abducts the great toe; flexes the metatarsophalageal joint
abductor hallucis innervation
medial plantar nerve
abductor hallucis blood supply
medial plantar a.
adductor brevis origin
inferior pubic ramus
adductor brevis insertion
pectineal line and linea aspera (deep to the pectineus and adductor longus mm.)
adductor brevis action
adducts, flexes, and medially rotates the femur
adductor brevis innervation
anterior division of the obturator nerve
adductor brevis blood supply
obturator a., deep femoral a.
adductor hallucis origin
oblique head: bases of metatarsals 2-4; transverse head: heads of metatarsals 3-5
adductor hallucis insertion
lateral side of base of the proximal phalanx of the great toe
adductor hallucis action
adducts the great toe (moves it toward midline of the foot; i.e.toward the 2nd digit)
adductor hallucis innervation
deep branch of the lateral plantar nerve
adductor hallucis blood supply
plantar arterial arch
adductor longus origin
medial portion of the superior pubic ramus
adductor longus insertion
linea aspera of the femur
adductor longus action
adducts, flexes, and medially rotates the femur
adductor longus innervation
anterior division of the obturator nerve
adductor longus blood supply
obturator a., deep femoral a.
adductor magnus origin
ischiopubic ramus and ischial tuberosity
adductor magnus insertion
linea aspera of the femur; the ischiocondylar part inserts on the adductor tubercle of the femur
adductor magnus action
adducts, flexes, and medially rotates the femur; extends the femur (ischiocondylar part)
adductor magnus innervation
posterior division of the obturator nerve; tibial nerve (ischiocondylar part)
adductor magnus blood supply
obturator a., deep femoral a., medial femoral circumflex a.
adductor minimus origin
lower portion of the inferior pubic ramus
adductor minimus insertion
gluteal ridge and upper part of the linea aspera of the femur
adductor minimus action
adducts and laterally rotates the femur
adductor minimus innervation
posterior division of the obturator nerve
adductor minimus blood supply
obturator a., medial femoral circumflex a., deep femoral a.
articularis genu origin
anterior surface of the femur above the patellar surface
articularis genu insertion
articular capsule of the knee
articularis genu action
elevates the articular capsule of the knee joint
articularis genu innervation
femoral nerve
articularis genu blood supply
descending genicular a.
biceps femoris origin
long head: ischial tuberosity; short head: lateral lip of the linea aspera
biceps femoris insertion
head of fibula and lateral condyle of the tibia
biceps femoris action
extends the thigh, flexes the leg
biceps femoris innervation
long head: tibial nerve; short head: common fibular (peroneal) nerve
biceps femoris blood supply
perforating branches of the deep femoral a.
dorsal interosseous (foot) origin
shafts of adjacent metatarsal bones
dorsal interosseous (foot) insertion
bases of the proximal phalanges for digit 2 (both sides) and; digits 3,4 (lateral side)
dorsal interosseous (foot) action
abduct digits 2-4 (move these digits away from midline as defined by a plane passing through the 2nd digit); flex the metatarsophalangeal joints and extend the interphalangeal joints of those digits
dorsal interosseous (foot) innervation
deep branch of the lateral plantar nerve
dorsal interosseous (foot) blood supply
dorsal metatarsal aa.
extensor digitorum brevis origin
superolateral surface of the calcaneus
extensor digitorum brevis insertion
extensor expansion of toes 1-4
extensor digitorum brevis action
extends toes 1-4
extensor digitorum brevis innervation
deep fibular (peroneal) nerve
extensor digitorum brevis blood supply
dorsalis pedis a.
extensor digitorum brevis origin
lateral condyle of the tibia, anterior surface of the fibula, lateral portion of the interosseous membrane
extensor digitorum brevis insertion
dorsum of the lateral 4 toes via extensor expansions (central slip inserts on base of middle phalanx, lateral slips on base of distal phalanx)
extensor digitorum brevis action
extends the metatarsophalangeal, proximal interphalangeal and distal interphalangeal joints of the lateral 4 toes
extensor digitorum brevis innervation
deep fibular (peroneal) nerve
extensor digitorum brevis blood supply
anterior tibial a.
extensor hallucis brevis origin
superolateral surface of the calcaneus
extensor hallucis brevis insertion
dorsum of base of proximal phalanx of the great toe
extensor hallucis brevis action
extends the great toe
extensor hallucis brevis innervation
deep fibular (peroneal) nerve
extensor hallucis brevis blood supply
dorsalis pedis a.
extensor hallucis longus origin
middle half of the anterior surface of the fibula and the interosseous membrane
extensor hallucis longus insertion
base of the distal phalanx of the great toe
extensor hallucis longus action
extends the metatarsophalangeal interphalangeal joints of the great toe
extensor hallucis longus innervation
deep fibular (peroneal) nerve
extensor hallucis longus blood supply
anterior tibial a.
fibulas (peroneus) brevis origin
lower one third of the lateral surface of the fibula
fibulas (peroneus) brevis insertion
tuberosity of the base of the 5th metatarsal
fibulas (peroneus) brevis action
extends (plantar flexes) and everts the foot
fibulas (peroneus) brevis innervation
superficial fibular (peroneal) nerve
fibulas (peroneus) brevis blood supply
fibular (peroneal) a.
fibularis (peroneus) longus origin
upper two/thirds of the lateral surface of the fibula
fibularis (peroneus) longus insertion
after crossing the plantar surface of the foot deep to the intrinsic muscles, it inserts on the medial cuneiform and the base of the 1st metatarsal bone
fibularis (peroneus) longus action
extends (plantar flexes) and everts the foot
fibularis (peroneus) longus innervation
superficial fibular (peroneal) nerve
fibularis (peroneus) longus blood supply
fibular (peroneal) a.
fibularis (peroneus) tertius origin
distal part of the anterior surface of the fibula
fibularis (peroneus) tertius insertion
dorsum of the shaft of the 5th metatarsal bone
fibularis (peroneus) tertius action
everts the foot
fibularis (peroneus) tertius innervation
deep fibular (peroneal) nerve
fibularis (peroneus) tertius blood supply
anterior tibial a.
flexor digiti minimi brevis (foot) origin
base of 5th metatarsal bone
flexor digiti minimi brevis (foot) insertion
lateral side of base of proximal phalanx of 5th digit
flexor digiti minimi brevis (foot) action
flexes the metatarsophalangeal joint of the 5th digit
flexor digiti minimi brevis (foot) innervation
lateral plantar nerve
flexor digiti minimi brevis (foot) blood supply
lateral plantar a.
flexor digitorum brevis origin
tuberosity of the calcaneus, plantar aponeurosis, intermuscular septae
flexor digitorum brevis insertion
base of the middle phalanx of digits 2-5 after splitting to allow passage of the flexor digitorum longus tendons
flexor digitorum brevis action
flexes the metatarsophalangeal and proximal interphalangeal joints of digits 2-5
flexor digitorum brevis innervation
medial plantar nerve
flexor digitorum brevis blood supply
medial and lateral plantar aa.
flexor digitorum longus origin
middle half of the posterior surface of the tibia
flexor digitorum longus insertion
bases of the distal phalanges of digits 2-5
flexor digitorum longus action
flexes the metatarsophalangeal, proximal interphalangeal and distal interphalangeal joints of digits 2-5; plantar flexes the foot
flexor digitorum longus innervation
tibial nerve
flexor digitorum longus blood supply
tibial a.
flexor hallucis brevis origin
cuboid, lateral cuneiform, medial side of the first metatarsal
flexor hallucis brevis insertion
medial belly: medial side of proximal phalanx of the great toe; lateral belly: lateral side of the proximal phalanx of the great toe
flexor hallucis brevis action
flexes the metatarsophalangeal joint of the great toe
flexor hallucis brevis innervation
medial plantar nerve (lateral belly occasionally receives innervation from the lateral plantar nerve)
flexor hallucis brevis blood supply
medial plantar a.
flexor hallucis longus origin
lower 2/3 of the posterior surface of the fibula
flexor hallucis longus insertion
base of the distal phalanx of the great toe
flexor hallucis longus action
flexes the metatarsophalangeal and proximal interphalangeal joints of the great toe; plantar flexes the foot
flexor hallucis longus innervation
tibial nerve
flexor hallucis longus blood supply
fibular (peroneal) a. and tibial a.
gastrocnemius origin
femur; medial head: above the medial femoral condyle; lateral head: above the lateral femoral condyle
gastrocnemius insertion
dorsum of the calcaneus via the calcaneal (Achilles’) tendon
gastrocnemius action
flexes leg; plantar flexes foot
gastrocnemius innervation
tibial nerve
gastrocnemius blood supply
sural aa. (from the popliteal a.), posterior tibial a.
gemellus, inferior origin
ischial tuberosity
gemellus, inferior insertion
obturator internus tendon
gemellus, inferior action
laterally rotates the femur
gemellus, inferior innervation
nerve to the quadratus femoris m.
gemellus, inferior blood supply
inferior gluteal a.
gemellus, superior origin
ischial spine
gemellus, superior insertion
obturator internus tendon
gemellus, superior action
laterally rotates the femur
gemellus, superior innervation
nerve to the obturator internus m.
gemellus, superior blood supply
inferior gluteal a.
gluteus maximus origin
posterior gluteal line, posterior surface of sacrum and coccyx, sacrotuberous ligament
gluteus maximus insertion
upper fibers: iliotibial tract; lowermost fibers: gluteal tuberosity of the femur
gluteus maximus action
extends the thigh; laterally rotates the femur
gluteus maximus innervation
inferior gluteal nerve
gluteus maximus blood supply
superior and inferior gluteal aa.
gluteus medius origin
external surface of the ilium between the posterior and anterior gluteal lines
gluteus medius insertion
greater trochanter of the femur
gluteus medius action
abducts the femur; medially rotates the thigh
gluteus medius innervation
superior gluteal nerve
gluteus medius blood supply
superior gluteal a.
gluteus minimus origin
external surface of the ilium between the anterior and inferior gluteal lines
gluteus minimus insertion
greater trochanter of the femur
gluteus minimus action
abducts the femur; medially rotates the thigh
gluteus minimus innervation
superior gluteal nerve
gluteus minimus blood supply
superior gluteal a.
gracilis origin
pubic symphysis and the inferior pubic ramus
gracilis insertion
medial surface of the tibia (via pes anserinus)
gracilis action
adducts the thigh, flexes and medially rotates the thigh, flexes the leg
gracilis innervation
anterior division of the obturator nerve
gracilis blood supply
obturator a.
iliacus origin
iliac fossa and iliac crest; ala of sacrum
iliacus insertion
lesser trochanter of the femur
iliacus action
flexes the thigh; if the thigh is fixed it flexes the pelvis on the thigh
iliacus innervation
femoral nerve
iliacus blood supply
iliolumbar a.
iliopsoas origin
iliac fossa; bodies and transverse processes of lumbar vertebrae
iliopsoas insertion
lesser trochanter of the femur