lower limb muscles Flashcards
adductor brevis origin
inferior pubic ramus
adductor brevis insertion
lesser trochanter to proximal linea aspera
adductor brevis action
adducts and medially rotates the thigh
adductor brevis innervation
obturator nerve
adductor magnus origin
inferior pubic ramus and ischial tuberosity
adductor magnus insertion
linea aspera
adductor tubercle
adductor magnus actions
adduction, extension, flexion, medial rotation, lateral rotation
adductor magnus innervation
obturator nerve
sciatic nerve
adductor longus innervation
obturator nerve
adductor longus action
adducts and medially rotates the thigh
adductor longus insertion
middle 2/3 linea aspera
adductor longus origin
body of pubis
biceps femoris origin
long head = ischial tuberosity
short head = linea aspera and lateral supracondylar ridge
biceps femoris insertion
head of fibula
lateral tibial condyle
biceps femoris action
flexes and laterally rotates the knee
extends the hip
biceps femoris innervation
sciatic nerve
extensor digitorum longus origin
upper 2/3 anterior surface of fibula and adjacent interosseous membrane
extensor digitorum longus insertion
extensor hood
base of middle and distal phalanges
extensor digitorum longus actions
extension of the lateral 4 toes at MTP
extension at the IP
assists dorsiflexion of the ankle
extensor digitorum longus innervation
deep peroneal nerve
extensor hallucis longus origin
middle 1/2 of the anterior surface of fibula and adjacent interosseous membrane
extensor hallucis longus insertion
dorsal surface, base of distal phalanx of great toe
may get slips to base of proximal phalanx of first metatarsal
extensor hallucis longus actions
extends all joints of the great toe mainly MTP
powerful dorsiflexor
extensor hallucis longus innervation
deep peroneal nerve
flexor digitorum longus origin
medial aspect posterior surface of tibia
flexor digitorum longus insertion
four tendons to the plantar aspect of the distal phalanges
flexor digitorum longus actions
flexion of toes 2-5 at DIP, PIP, MTP
Assists plantarflexion of the foot at the ankle joint
Flexor digitorum longus innervation
tibial nerve
flexor hallucis longus origin
lower 2/3 of posterior surface of fibula and interosseous membrane
flexor hallucis longus insertion
plantar surface of the base of the distal phalanx of the great to
flexor hallucis longus actions
flexion of all the joints of the great toe
assists plantarflexion
flexor hallucis longus innervation
tibial nerve
Gastrocnemius origin
femoral condyles
Gastrocnemius insertion
posterior surface of calcaneus
Gastrocnemius actions
knee flexion and ankle plantarflexion
gastrocnemius innervation
tibial nerve
Gemellus inferior action
deep external hip rotator
Gemellus superior action
deep external hip rotator
Gluteus maximus origin
outer surface of posterior ilium, sacrum and coccyx
gluteus maximus insertion
ITB and gluteal tuberosity
gluteus maximus action
extension and lateral rotation of thigh
gluteus maximus innervation
inferior gluteal nerve
gluteus medius origin
outer surface of ilium
gluteus medius insertion
lateral greater trochanter
gluteus medius action
abducts and MR femur
gluteus medius innervation
superior gluteal nerve
gluteus minimus origin
outer surface of ilium
gluteus minimus insertion
anterior surface of greater trochanter
gluteus minimus action
abducts and MR femur
gluteus minimus innervation
superior gluteal nerve
gracilis origin
inferior pubic ramus
gracilis insertion
pes anserinus
gracilis actions
flexion, MR, adduction of thigh
flexion and MR knee
gracilis innervation
obturator nerve
ilio-psoas origin
transverse processes of T12-L4
illiac fossa
ilio-psoas insertion
lesser trochanter
ilio-psoas actions
hip flexion
ilio-psoas innervation
L1-3
obturator internus action
deep external hip rotator
obturator externus action
deep external hip rotator
pectineus origin
superior pubic ramus
pectineus insertion
lesser trochanter to linea aspera
pectineus action
flexes and adducts the thigh
pectineus innervation
femoral nerve
peroneus brevis origin
lower 2/3 of the lateral surface of the fibula
peroneus brevis insertion
tubercle on the lateral side of the base of the 5th metatarsal
peroneus brevis actions
eversion of foot
plantarflexion of ankle
peroneus brevis innervation
superficial peroneal nerve
peroneus longus origin
upper 2/3 lateral surface of fibula
lateral tibial condyle
lateral side of fibula head
peroneus longus insertion
base of 1st metatarsal
medial cuneiform
peroneus longus actions
eversion and plantarflexion of the foot
supports the arches of the foot
peroneus longus innervation
superficial peroneal nerve
peroneus tertius origin
lower 1/4 of medial fibula and adjacent interosseous membrane
peroneus tertius insertion
base of 5th metatarsal, medial and dorsal aspect
peroneus tertius actions
weak evertor
weak dorsiflexor
peroneus tertius innervation
deep peroneal nerve
piriformis origin
internal surfaces sacrum and gluteal surface of ilium
piriformis insertion
greater trochanter
piriformis action
external rotation and abduction of femur
piriformis innervation
1st and 2nd sacral nerves`
plantaris origin
lateral supracondylar ridge of femur above lateral head of gastrocnemius
plantaris insertion
medial side of tendocalcaneus
posterior surface of calcaneus
plantaris action
insignificant plantarflexor of foot and weak knee flexor
plantaris innervation
tibial nerve
popliteus origin
outer surface of lateral femoral condyle
popliteus insertion
posterior surface of proximal tibia, above soleal line
popliteus action
unlocks the knee by laterally rotating the femur on fixed tibia, rotates knee medially, flexes knee
popliteus innervation
tibial nerve
quadratus femoris action
deep external hip rotator
rectus femoris origin
long head = AIIS
short head = ilium above acetabulum
rectus femoris insertion
quadriceps tendon of patella
rectus femoris action
extends the knee and flexes the hip
rectus femoris innervation
femoral nerve
sartorius origin
ASIS
sartorius insertion
pes anserinus
sartorius action
flexes, abducts and laterally rotates thigh
medially rotates flexed knee
sartorius innervation
femoral nerve
semimembranosus origin
ischial tuberosity
semimembranosus insertion
posterior aspect of medial tibial condyle
semimembranosus action
extends hip
flexes and MR knee
semimembranosus innervation
sciatic nerve
semitendinosus origin
ischial tuberosity
semitendinosus insertion
pes anserinus
semitendinosus action
extend hip
flex and MR knee
soleus origin
soleal line, posterior surface of tibia
posterior surface of upper 1/3 of fibula including the head
soleus insertion
fuses with tendon of gastrocnemius to form the upper part of the tendocalcaneus into posterior surface of calcaneus
soleus action
plantarflexion of foot
soleus innervation
tibial nerve
TFL origin
ASIS
lateral iliac crest
TFL insertion
ITB
TFL actions
flexes and MR thigh
abducts the hip
TFL innervation
superior gluteal nerve
tibialis anterior origin
upper 1/2 to 2/3 lateral surface of tibia and adjacent interosseous membrane
tibialis anterior insertion
medial surface of medial cuneiform and base of 1st metatarsal
insertion blends with that of peroneus longus
tibialis anterior action
dorsiflexion of ankle
inversion of foot
tibialis anterior innervation
deep peroneal nerve
tibialis posterior origin
med= posterior surface of the tibia and interosseous membrane
lat = proximal posterior surface of fibula
tibialis posterior insertion
Tubercle on medial side of navicular and plantar surface of medial cuneiform
Slips to plantar surfaces of all tarsal bones except talus
tibialis posterior action
inversion of foot
assists plantarflexion
supports medial longitudinal arch
tibialis posterior innervation
tibial nerve
vastus intermedius origin
upper 2/3 anterior and lateral surfaces of the femur
vastus intermedius insertion
quadriceps tendon
vastus intermedius action
extends the knee
vastus intermedius innervation
femoral nerve
vastus lateralis origin
lateral femur
vastus lateralis insertion
quadriceps tendon
vastus lateralis action
extends the knee
vastus lateralis innervation
femoral nerve
vastus medialis origin
medial femur
vastus medialis insertion
quadriceps tendon
vastus medialis action
extends the knee
vastus medialis innervation
femoral nerve