Lower Leg and Foot Flashcards
Tibialis Anterior
O: lateral condyle of tibia
I: medial cuneiform, base of 1st metatarsal bone
N: deep fibular nerve (L4-S1)
A: DF and inverts ankle
Extensor Hallicus Longus
O: anterior surface of fibula
I: base of distal phalanx of great toe
N: deep fibular (L4-S1)
A: extends great toe, DF
Extensor Digitorum Longus
O: lateral condyle of tibia; anterior surface of fibula
I: middle/distal phalanges of 4 lateral digits
N: deep fibular (L4-S1)
A: extends lateral 4 toes; DF`
Fibularis Tertius
O: inferior surface of fibula
I: dorsum of base of 5th metatarsal bone
N: deep fibular (L4-S1)
A: DF; aids in foot eversion
Fibularis Longus
O: head/superior surface of fibula; lateral tibial condyle
I: plantar surface of base of 1st metatarsal bone and medial cuneiform bone
N: superficial fibular nerve (L5-S2)
A: eversion, weak PF; depresses 1st metatarsal
Fibularis Brevis
O: inferior surface of fibula
I: tuberosity on lateral side of base of 5th metatarsal bone
N: superficial fibular nerve (L5-S2)
A: eversion; weak PF
Gastrocnemius
O: lateral femoral condyle and popliteal surface of femur
I: posterior surface of calcaneus
N: tibial nerve (L4-S3)
A: PF ankle, flexes knee joint
Soleus
O: posterior head of fibula; medial border of soleal line
I: calcaneus
N: tibial nerve (L4-S3)
A: PF
Popliteus
O: lateral condyle of femur
I: posterior surface of tibia
N: tibial nerve
A: unlocks knee by IR leg
Tibialis Posterior
O: posterior surface of tibia and fibula
I: navicular, med/intermediate cuneiforms, cuboid, base of 2-4 metatarsal bones, tendon of FHB
N: tibial nerve (L4-S3)
A: PF, inverts foot (controls pronation)
Flexor Digitorum Longus
O: posterior surface of tibia
I: bases of distal phalanges of lateral 4 digits
N: tibial nerve
A: flexes toes; PF ankle; supports longitudinal arch
Flexor Hallicus Longus
O: posterior surface of fibula
I: plantar surface of base of distal phalanx of great toe
N: tibial nerve
A: flexes great toe, PF foot; supports longitudinal arch
Abductor Hallicus
O: medial process of tuber calcanel (calcaneus)
I: medial side of base of proximal phalanx of great toe
N: medial plantar nerve
A: abducts / flexes great toe
Flexor Digitorum Brevis
O: medial process of tuber calcanel (calcaneus)
I: both sides of middle phalanges of lateral 4 digits
N: medial plantar nerve
A: flexes lateral 4 toes
Abductor Digiti Minimi
O: medial process of tuber calcanel
I: lateral side of base of proximal phalanx of 5th digit
N: lateral plantar nerve
A: abducts and flexes 5th digit
Quadratus Plantae
O: medial margin of plantar surface of calcaneus
I: margin of tendon of flexor digitorum longus
N: lateral plantar nerve
A: assists FDL in flexing lateral 4 digits
Lumbricals
O: tendon of FDL
I: medial bases of proximal phalanges of lateral 4 digits and extensor expansion of tendons of FDL
N: medial 2 - medial plantar; lateral 3,4,5 - lateral plantar
A: flex MTP and extends IPs
Flexor Hallicus Brevis
O: plantar surface of cuboid and lateral cuneiform bones
I: both sides of base of proximal phalanx of great toe
N: medial plantar nerve
A: flexes proximal phalanx of great toe
Adductor Hallicus
O: bases of metatarsals 2-4; plantar ligaments of MTP joints
I: lateral side of base of proximal phalanx of great toe
N: deep lateral plantar nerve
A: adducts great toe
Flexor Digiti Minimi Brevis
O: base of 5th metatarsal bone
I: base of proximal phalanx of 5th digit
N: superficial lateral plantar nerve
A: flexes proximal phalanx of 5th digit
Dorsal Interossei
O: adjacent sides of metatarsal bones 1-5
I: proximal phalanx
N: lateral plantar nerve
A: abducts digits 2-4 and flexes MTP joints
Plantar Interossei
O: bases and medial sides of metatarsal bone 3-5
I: medial sides of bases of proximal phalanges of digits 3-5
N: lateral plantar nerve
A: adducts digits (3-5) and flexes MTP joints
