cueFlash

Glossary of Anat- Lower Limb Muscles

Start Studying! Add Cards ↓

Created by bekabirder

obturator internus: origin
pelvic surface of ilium and ischium; obturator membrane
obturator internus: insertion
greater trochanter of femur
obturator internus: innervation
nerve to obturator internus (L5, S1, S2)
obturator internus: action
rotates thigh laterally; abducts thigh; assists in holding head of femur in acetabulum
piriformis: origin
pelvic surface of 2nd-4th sacral segments; superior margin of greater sciatic notch and sacrotuberous ligament
piriformis: insertion
greater trochanter of femur
piriformis: innervation
anterior rami of S1 and S2
piriformis: action
rotates thigh laterally; abducts thigh; assists in holding head of femur in acetabulum
levator ani (puborectalis, pubococcygeus, iliococcygeus): origin
body of pubis, tendinous arch of levator ani, ischial spine
levator ani (puborectalis, pubococcygeus, iliococcygeus): insertion
perineal body, coccyx, anococcygeal ligament, walls of prostate, vagina, rectum, anal canal
levator ani (puborectalis, pubococcygeus, iliococcygeus): innervation
nerve to levator ani (branches of S4), inferior anal (rectal) nerve, coccygeal plexus
levator ani (puborectalis, pubococcygeus, iliococcygeus): action
helps support pelvic viscera; resists increases in intra-abdominal pressure
coccygeus (ischiococcygeus): origin
ischial spine
coccygeus (ischiococcygeus): innervation
branches of S4 and S5 nerves
coccygeus (ischiococcygeus): action
forms small part of pelvic diaphragm that supports pelvic viscera; flexes coccyx
gluteus maximus: origin
Ilium posterior to posterior gluteal line; dorsal surface of sacrum and coccyx; and sacrotuberous ligament
gluteus maximus: insertion
Most fibers end in iliotibial tract, which inserts into lateral condyle of tibia; some fibers insert on gluteal tuberosity of femur
gluteus maximus: innervation
Inferior gluteal nerve (L5,S1,S2)
gluteus maximus: action
Extends thigh and assists in its lateral rotation; steadies thigh and assists in rising from sitting position
gluteus medius: origin
External surface of ilium between anterior and posterior gluteal lines
gluteus medius: insertion
Lateral surface of greater trochanter of femur
gluteus medius: innervation
Superior gluteal nerve (L4,L5,S1)
gluteus medius: action
Abducts and medially rotates thigh; keeps pelvis level when opposite leg is raised
gluteus minimis: origin
External surface of ilium between anterior and inferior gluteal lines
gluteus minimus: insertion
Anterior surface of greater trochanter of femur
gluteus minimus: innervation
Superior gluteal nerve (L4,L5,S1)
gluteus minimus: action
Abduct and medially rotate thigh; keep pelvis level when opposite leg is raised
Tensor fasciae latae: origin
Anterior superior iliac spine; anterior part of iliac crest
tensor fasciae latae: insertion
Iliotibial tract, which attaches to lateral condyle of tibia (Gerdy tubercle)
tensor fasciae latae: innervation
Superior gluteal nerve (L4,L5,S1)
tensor fasciae latae: action
flexes thigh
gemellus superior: origin
ischial spine
gemellus superior: insertion
Medial surface of greater trochanter of femur
gemellus superior: innervation
Same as obturator internus
gemellus superior: action
Laterally rotate extended thigh; abduct flexed thigh; steady femoral head in acetabulum
gemellus inferior: origin
Ischial tuberosity
gemellus inferior: insertion
Medial surface of greater trochanter of femur
gemellus inferior: innervation
Nerve to quadratus femoris (L5, S1)
gemellus inferior: action
Laterally rotate extended thigh; abduct flexed thigh; steady femoral head in acetabulum
quadratus femoris: origin
Lateral border of ischial tuberosity
quadratus femoris: insertion
Quadrate tubercle on intertrochanteric crest of femur and area inferior to it
quadratus femoris: innervation
Nerve to quadratus femoris (L5, S1)
quadratus femoris: action
Laterally rotates thigh; steadies femoral head in acetabulum
gluteus maximus: blood supply
primarily the Superior and Inferior gluteal aa, vv; Internal pudendal a, v also contribute to the perineal (medial) sections of these muscles
gluteus minimus: blood supply
primarily the Superior and Inferior gluteal aa, vv; Internal pudendal a, v also contribute to the perineal (medial) sections of these muscles
gluteus medius: blood supply
primarily the Superior and Inferior gluteal aa, vv; Internal pudendal a, v also contribute to the perineal (medial) sections of these muscles
tensor fasciae latae: blood supply
primarily the Superior and Inferior gluteal aa, vv; Internal pudendal a, v also contribute to the perineal (medial) sections of these muscles
piriformis: blood supply
primarily the Superior and Inferior gluteal aa, vv; Internal pudendal a, v also contribute to the perineal (medial) sections of these muscles
obturator internus: blood supply
primarily the Superior and Inferior gluteal aa, vv; Internal pudendal a, v also contribute to the perineal (medial) sections of these muscles
gemellus superior: blood supply
primarily the Superior and Inferior gluteal aa, vv; Internal pudendal a, v also contribute to the perineal (medial) sections of these muscles
gemellus inferior: blood supply
primarily the Superior and Inferior gluteal aa, vv; Internal pudendal a, v also contribute to the perineal (medial) sections of these muscles
quadratus femoris: blood supply
primarily the Superior and Inferior gluteal aa, vv; Internal pudendal a, v also contribute to the perineal (medial) sections of these muscles
sartorius: origin
Anterior superior iliac spine and superior part of notch inferior to it
sartorius: insertion
Superior part of medial surface of tibia
sartorius: innervation
Femoral nerve (L2,L3)
sartorius: action
Flexes, abducts, and laterally rotates thigh at hip joint; flexes leg at knee joint
rectus femoris: origin
Anterior inferior iliac spine and ilium superior to acetabulum
rectus femoris: insertion
Via common tendinous and independent attachments to base of patella; indirectly via patellar ligament to tibail tuberosity; medial and lateral vasti also attach to tibia and patella via aponeuroses
rectus femoris: innervation
Femoral nerve (L2,L3,L4)
rectus femoris: action
Extend leg at knee joint; steadies hip joint and help iliopsoas flex thigh
vastus lateralis: origin
Greater trochanter and lateral lip of linea aspera
vastus lateralis: insertion
As for rectus femoris
vastus lateralis: innervation
Femoral nerve (L2,L3,L4)
vastus lateralis: action
Extends leg at knee joint
vastus medius: origin
Intertrochanteric line and medial lip of linea aspera of femur
vastus medius: insertion
As for rectus femoris
vastus medius: innervation
Femoral nerve (L2,L3,L4)
vastus medius: action
Extends leg at knee joint, stabilizes patella
vastus intermedius: origin
Anterior and lateral surfaces of shaft of femur
vastus intermedius: insertion
As for rectus femoris
vastus intermedius: innervation
Femoral nerve (L2,L3,L4)
vastus intermedius: action
Extends leg at knee joint
psoas major: origin
Sides of T12-L5 vertebrae discs between them; transverse processes of all lumbar vertebrae
psoas major: insertion
Lesser trochanter of femur
iliacus: origin
Iliac crest, iliac fossa, ala of sacrum, and anterior sacroiliac ligaments
iliacus: insertion
Tendon of psoas major, lesser trochanter, and femur distal to it
psoas major: innervation
Anterior rami of lumbar nerves (L1,L2,L3)
iliacus: innervation
Femoral nerve (L2,L3)
psoas: action
Acting conjointly in flexing thigh at hip joint and in stabilizing this joint; also a postural muscle that helps control deviation of the trunk and is active during standing
iliacus: action
Acting conjointly in flexing thigh at hip joint and in stabilizing this joint
pectineus: origin
Superior ramus of pubis
pectineus: insertion
Pectineal line of femur, just inferior to lesser trochanter
pectineus: innervation
Femoral nerve (L2,L3); may receive branch from obturator nerve
pectineus: action
Adducts and flexes thigh; assists with medial rotation of thigh
sartorius: blood supply
Femoral a, v
rectus femoris: blood supply
Femoral a, v
vastus lateralis: blood supply
Femoral a, v
vastus medius: blood supply
Femoral a, v
vastus intermedius: blood supply
Femoral a, v
psoas major: blood supply
Femoral a, v
iliacus: blood supply
Femoral a, v
pectineus: blood supply
Femoral a, v
obturator externus: origin
Margins of obturator foramen and obturator membrane
obturator externus: insertion
Trochanteric fossa of femur
obturator externus: innervation
Obturator nerve (L3,L4)
obturator externus: action
Laterally rotates thigh; steadies head of femur in acetabulum
gracilis: origin
Body and inferior ramus of pubis
gracilis: insertion
Superior part of medial surface of tibia
gracilis: innervation
Obturator nerve (L2,L3)
gracilis: action
Adducts thigh, flexes leg, and helps rotate it medially
adductor longus: origin
Body of pubis inferior to pubic crest
adductor longus: insertion
Middle third of linea aspera of femur
adductor longus: innervation
Obturator nerve (L2,L3,L4)
adductor longus: action
Adducts thigh
adductor brevis: origin
Body and inferior ramus of pubis
adductor brevis: insertion
Pectineal line and proximal part of linea aspera of femur
adductor brevis: innervation
Obturator nerve (L2,L3,L4,)
adductor brevis: action
Adducts thigh and to some extent flexes it
adductor magnus (adductor part): origin
inferior ramus of pubis, ramus of ischium
adductor magnus (hamstring part): origin
ischial tuberosity
adductor magnus (adductor part): insertion
gluteal tuberosity, linea aspera, medial supracondylar line
adductor magnus (hamstring part): insertion
adductor tubercle of femur
adductor magnus (adductor part): innervation
obturator nerve (L2,L3,L4)
adductor magnus (hamstring part): innervation
tibial part of sciatic nerve (L4)
adductor magnus (adductor part): action
adducts thigh,
also flexes thigh


adductor magnus (hamstring part): action
adducts thigh,
extends it


obturator externus: blood supply
Profunda femoris a,v; Obturator a,v
gracilis: blood supply
Profunda femoris a,v; Obturator a,v
adductor longus: blood supply
Profunda femoris a,v; Obturator a,v
adductor brevis: blood supply
Profunda femoris a,v; Obturator a,v
adductor magnus: blood supply
Profunda femoris a,v; Obturator a,v
biceps femoris (long head): origin
ischial tuberosity
biceps femoris (short head): origin
linea aspera and lateral supracondylar line of femur
biceps femoris: insertion
Lateral side of head of fibula; tendon is split at this site by fibular collateral ligament of knee
biceps femoris (long head): innervation
tibial division of sciatic nerve (L5,S1,S2)
biceps femoris (short head): innervation
common fibular division of sciatic nerve (L5, S1, S2)
biceps femoris: action
Flexes leg and rotates it laterally when knee is flexed; extends thigh
semitendinous: origin
Ischial tuberosity
semitendonous: insertion
Medial surface of superior part of tibia
semitendinosus: innervation
Tibial division of sciatic nerve (L5,S1,S2)
semitendinosus: action
Extend thigh; flex leg and rotate it medially when knee is flexed; when thigh and leg are flexed, can extend trunk
semimembranous: origin
Ischial tuberosity
semimembranous: insertion
Posterior part of medial condyle of tibia; reflected attachment forms oblique popliteal ligament
semimembranous: innervation
Tibial division of sciatic nerve (L5,S1,S2)
semimembranous: action
Extend thigh; flex leg and rotate it medially when knee is flexed; when thigh and leg are flexed, can extend trunk
biceps femoris: blood supply
Profunda femoris a,v
semitendinosus: blood supply
Profunda femoris a,v
semimembranous: blood supply
Profunda femoris a,v
tibialis anterior: origin
Lateral condyle and superior half of lateral surface of tibia and interosseous membrane
tibialis anterior: insertion
Medial and inferior surfaces of medial cuneiform and base of 1st metatarsal
tibialis anterior: innervation
Deep fibular nerve (L4,L5)
tibialis anterior: action
Dorsiflexes ankle; inverts foot, supports longitudinal arch of foot
extensor digitorum longus: origin
Lateral condyle of tibia and superior three fourths of anterior surface of interosseous membrane
extensor digitorum longus: insertion
Middle and distal phalanges of lateral four digits
extensor digitorum longus: innervation
Deep fibular nerve (L5,S1)
extensor digitorum longus: action
Extends lateral four digits; dorsiflexes ankle
fibularis tertius: origin
Inferior third of anterior surface of fibula and interosseous membrane
fibularis tertius: insertion
Dorsum of base of 5th metatarsal
fibularis tertius: innervation
Deep fibular nerve (L5, S1)
fibularis tertius: action
Dorsiflexes ankle; aids in eversion of foot
extensor hallucis longus: origin
Middle part of anterior surface of fibula and interosseous membrane
extensor hallicus longus: insertion
Dorsal aspect of base of distal phalanx of great toe
extensor hallucis longus: innervation
Deep fibular nerve (L5,S1)
extensor hallucis longus: action
Extends great toe; dorsiflexes ankle
tibialis anterior: blood supply
Anterior tibial a, v
extensor digitorum longus: blood supply
Anterior tibial a, v
fibularis tertius: blood supply
Anterior tibial a, v
extensor hallucis longus: blood supply
Anterior tibial a, v
fibularis longus: origin
Head and superior two thirds of lateral surface of fibula
fibularis longus: insertion
Runs through sole of foot to base of 1st metatarsal and medial cuneiform
fibularis longus: innervation
Superficial fibular nerve (L5,S1,S2)
fibularis longus: action
Evert foot and weakly plantarflex ankle, supports transverse arch of foot
fibularis brevis: origin
Inferior two thirds of lateral surface of fibula
fibularis brevis: insertion
Dorsal surface of tuberosity of base of 5th metatarsal
fibularis brevis: innervation
Superficial fibular nerve (L5,S1,S2)
fibularis brevis: action
Evert foot and weakly plantarflex ankle
fibularis longus: blood supply
Fibular a, v
fibularis brevis: blood supply
Fibular a, v
gastrocnemius (lateral head): origin
lateral aspect of lateral condyle of femur
gastrocnemius (medial head): origin
popliteal surface of femur, superior to medial condyle
gastrocnemius: insertion
Posterior surface of calcaneus via calcaneal tendon
gastrocnemius: innervation
Tibial nerve (S1,S2)
gastrocnemius: action
Plantar-flexes ankle when knee is extended; raises heel during walking, and flexes leg at knee joint
soleus: origin
Posterior aspect of head of fibula, superior quarter of posterior surface of fibula, soleal line and medial border of tibia
soleus: insertion
Posterior surface of calcaneus via calcaneal tendon
soleus: innervation
Tibial nerve (S1,S2)
soleus: action
Plantar-flexes ankle; steadies leg on foot
plantaris: origin
Inferior end of lateral supracondylar line of femur and oblique popliteal ligament
plantaris: insertion
Posterior surface of calcaneus via calcaneal tendon
plantaris: innervation
Tibial nerve (S1,S2)
plantaris: action
Weakly assists gastrocnemius in plantarflexing ankle
popliteus: origin
Lateral surface of lateral condyle of femur and lateral meniscus
popliteus: insertion
Posterior surface of tibia, superior to soleal line
popliteus: innervation
Tibial nerve (L4,L5,S1)
popliteus: action
Weakly flexes knee and unlocks it by laterally rotating femur on fixed tibia, or medially rotating tibia of unplanted limb
flexor hallucis longus: origin
Inferior two thirds of posterior surface of fibula and inferior part of interosseous membrane
flexor hallucis longus: insertion
Base of distal phalanx of great toe
flexor hallucis longus: innervation
Tibial nerve (S2,S3)
flexor hallucis longus: action
Flexes great toe at all joints; weakly plantarflexes ankle; supports medial longitudinal arch of foot
flexor digitorum longus: origin
Medial part of posterior surface of tibia inferior to soleal line and by a broad tendon to fibula
flexor digitorum longus: insertion
Bases of distal phalanges of lateral four digits
flexor digitorum longus: innervation
Tibial nerve (S2,S3)
flexor digitorum longus: action
Flexes lateral four digits; plantarflexes ankle; supports longitudinal arches of foot
tibialis posterior: origin
interosseous membrane, posterior surface of tibia inferior to soleal line, and posterior surface of fibula
tibialis posterior: insertion
Primarily to tuberosity of navicular; also to cuneiforms, cuboid and bases of 2nd -4th metatarsals
tibialis posterior: innervation
Tibial nerve (L4,L5)
tibialis posterior: action
Plantarflexes ankle; inverts foot; supports medial longitudinal arch of foot
gastrocnemius: blood supply
Posterior tibial a,v, Fibular a,v
soleus: blood supply
Posterior tibial a,v, Fibular a,v
plantaris: blood supply
Posterior tibial a,v, Fibular a,v
popliteus: blood supply
Posterior tibial a,v, Fibular a,v
flexor hallucis longus: blood supply
Posterior tibial a,v, Fibular a,v
flexor digitorum longus: blood supply
Posterior tibial a,v, Fibular a,v
tibialis posterior: blood supply
Posterior tibial a,v, Fibular a,v
extensor hallucis brevis: origin
Superior surface of cuboid bone
extensor hallucis brevis: insertion
Tendon of extensor hallicus longus and extensor expansion
extensor hallucis brevis: innervation
Deep fibular nerve
extensor hallucis brevis: action
Assists extensor hallicus longus in extension of great toe
extensor digitorum brevis: origin
Dorsal surface of calcaneus
extensor digitorum brevis: innervation
Deep fibular nerve
extensor digitorum brevis: insertion
Base of proximal phalanx
extensor digitorum brevis: action
Extension of toes, especially when foot is dorsiflexed
extensor hallucis brevis: blood supply
Dorsalis pedis artery
extensor digitorum brevis: blood supply
Dorsalis pedis artery
flexor digitorum brevis: origin
Medial tubercle of tuberosity of calcaneus, plantar aponeurosis, and intermuscular septa
flexor digitorum brevis: insertion
Both sides of middle phalanges of lateral four digits
flexor digitorum brevis: innervation
Medial plantar nerve (S2,S3)
flexor digitorum brevis: action
Flexes lateral four digits
abductor hallucis: origin
Medial tubercle of tuberosity of calcaneus, flexor retinaculum, and plantar aponeurosis
abductor hallucis: insertion
Medial side of base of proximal phalanx of 1st digit
abductor hallucis: innervation
Medial plantar nerve (S2,S3)
abductor hallucis: action
Abducts and flexes 1st digit (great toe)
abductor digiti minimi: origin
Medial and lateral tubercles of tuberosity of calcaneus, plantar aponeurosis, and intermuscular septa
abductor digiti minimi: insertion
Lateral side of base of proximal phalanx of 5th digit
abductor digiti minimi: innervation
Lateral plantar nerve (S2,S3)
abductor digiti minimi: action
Abducts and flexes 5th digit
quadratus plantae: origin
Medial surface and lateral margin of plantar surface of calcaneus
quadratus plantae: insertion
Posterolateral margin of tendon of flexor digitorum longus
quadratus plantae: innervation
Lateral plantar nerve (S2,S3)
quadratus plantae: action
Assists flexor digitorum longus in flexing lateral four digits
lumbricals: origin
Tendons of flexor digitorum longus
lumbricals: insertion
Medial aspect of expansion over lateral four digits
lumbricals: innervation
Medial and lateral plantar nerves (S2,S3)
lumbricals: action
Flex proximal phalanges; extend middle and distal phalanges of lateral four digits
flexor hallucis brevis: origin
Plantar surfaces of cuboid and lateral cuneiform
flexor hallucis brevis: insertion
Both sides of base of proximal phalanx of 1st digit
flexor hallucis brevis: innervation
Medial plantar nerve (S2,S3)
flexor hallucis brevis: action
Flexes proximal phalanx of 1st digit
adductor hallucis (oblique head): origin
bases of metatarsals 2-4
adductor hallucis (transverse head): origin
plantar ligament of 3rd-5th metatarsophalangeal joints
adductor hallucis: insertion
Tendons of both heads attach to lateral side of base of proximal phalanx of 1st digit
adductor hallucis: innervation
Deep branch of lateral plantar nerve (S2,S3)
adductor hallucis: action
Adducts 1st digit; assists in maintaining transverse arch of foot
flexor digit minimi brevis: origin
Base of 5th metatarsal
flexor digit minimi brevis: insertion
Base of proximal phalanx of 5th digit
flexor digit minimi brevis: innervation
Superficial branch of lateral plantar nerve (S2,S3)
flexor digiti minimi brevis: action
flexes proximal phalanx of 5th digit
dorsal interossei: origin
Adjacent sides of metatarsals 1-5
dorsal interossei (first): insertion
medial side of proximal phalanx of 2nd digit
dorsal interossei (2nd to 4th): insertion
lateral sides of 2nd-4th digits
dorsal interossei: innervation
Lateral plantar nerve (S2,S3)
dorsal interossei: action
Abducts digits (2-4) and flex metatarsophalangeal joints
plantar interossei: origin
Bases and medial sides of metatarsals 3-5
plantar interossei: insertion
Medial sides of bases of proximal phalanges of 3rd-5th digits
plantar interossei: innervation
Lateral plantar nerve (S2,S3)
plantar interossei: action
Adducts digits (3-5) and flex metatarsophalangeal joints
flexor digitorum brevis: blood supply
Medial plantar a., v., Lateral plantar a., v.
abductor hallucis: blood supply
Medial plantar a., v., Lateral plantar a., v.
abductor digiti minimi: blood supply
Medial plantar a., v., Lateral plantar a., v.
quadratus plantae: blood supply
Medial plantar a., v., Lateral plantar a., v.
lumbricals: blood supply
Medial plantar a., v., Lateral plantar a., v.
flexor hallucis brevis: blood supply
Medial plantar a., v., Lateral plantar a., v.
adductor hallucis: blood supply
Medial plantar a., v., Lateral plantar a., v.
flexor digiti minimi brevis: blood supply
Medial plantar a., v., Lateral plantar a., v.
dorsal interossei: blood supply
Medial plantar a., v., Lateral plantar a., v.
plantar interossei: blood supply
Medial plantar a., v., Lateral plantar a., v.

Add Cards

You must Login or Register to add cards