Extensor Digitorum Longus Lateral condyle of tibia; proximal, anterior shaft of fibula; and interosseous membrane Quadratus Plantae Posterior, lateral aspect of flexor digitorum longus tendon Abductor Digiti Minimi Lateral process of calcaneus and plantar aponeurosis Extensor Digitorum Brevis Middle phalanges of second through fifth toes Lumbricals of the foot If this muscle is paralyzed the extensors will pull the toes into a "claw- like" position Lumbricals of the foot First: Tibial L4, 5, S1 Second through fourth: Tibial L(4), (5), S1, 2 Abductor Hallucis Tibial L4, 5, S1 Gastrocnemius Acts as a crucial part of the circulatory system in the lower leg ("Second Heart") Abductor Digiti Minimi Flex the fifth toe and assists to abduct the fifth toe (metatarsophalangeal joint) Gastrocnemius Calcaneus via calcaneal tendon Dorsal Interossei Adjacent surfaces of all metatarsals Popliteus Proximal, posterior aspect of tibia Tibialis Anterior Medial cuneiform and base of the first metatarsal Fibularis Longus Superficial Fibular L4, 5, S1 Tibialis Posterior Proximal, posterior shafts of tibia and fibula; and interosseous membrane Flexor Hallucis Longus Distal phalanx of first toe Plantar Interossei Tibial S1,2 Fibularis Brevis Evert the foot, assist to plantar flex the ankle (talocrural joint) Popliteus Acts as the "key to the knee" in locking the tibiofemoral joint Fibularis Brevis Strongest Abductor of the Foot Popliteus Medially rotate the flexed knee (tibiofemoral joint) and flex the knee (T/F joint) Extensor Digitorum Longus Middle and distal phalanges of second through fifth toes Flexor Hallucis Longus Flex the first toe (metatarsophalangeal and interphalangeal joints), weak plantar flexion of ankle (talocrural joint), invert the foot Quadratus Plantae Can also be referred to as the "Flexor Digitorum Accessorius" Flexor Digitorum Longus The Flexor Hallucis Longus and this muscle form a junction known as the "Knot of Henry" Fibularis Longus Base of first metatarsal and medial cuneiform Extensor Hallucis Brevis Extend the first toe (metatarsophalangeal joint) Flexor Digitorum Brevis Tibial L4, 5, S1 Flexor Digitorum Longus Tibial L5, S1, (2) Extensor Hallucis Longus Deep Fibular L4, 5, S1 Extensor Digitorum Longus Lateral part of this muscle splits to become the fibularis tertius Flexor Digiti Minimi Brevis Tibial S1, 2 Adductor Hallucis If this muscle becomes tight or overworked it can create bunions Adductor Hallucis Tibial S1, 2 Extensor Digitorum Brevis Extend second through fourth toes (metatarsophalangeal and interphalangeal joints) Flexor Hallucis Brevis Contain the two sesamoid bones of the hallux in its "Y- shaped" tendons Extensor Digitorum Brevis Dorsal surface of calcaneus Plantaris Weak plantar flexion of the ankle (talocrural joint) and weak flexion of the knee (tibiofemoral joint) Tibialis Anterior Invert the foot and Dorsiflex the ankle (talocrural joint) Dorsal Interossei Abduct 2nd-4th toes and flex the 2nd-4th toes (metatarsophalangeal joint) Flexor Digiti Minimi Brevis Base of proximal phalanx of fifth toe Plantar Interossei Medial surfaces of 3rd-5th metatarsals Extensor Hallucis Longus Doctors can use the strength of this muscle to test for L5 nerve issues Extensor Hallucis Brevis Proximal Phalanx of first toe Soleus Plantar Flex the ankle (talocrural joint) Tibialis Posterior Tibial L(4), 5, S1 Flexor Hallucis Brevis Plantar surfaces of cuboid and lateral cuneiform Plantaris Lateral supracondylar line of femur Soleus Soleal line; proximal, posterior surface of tibia; and posterior aspect of head of fibula Extensor Digitorum Longus Lateral condyle of tibia; proximal, anterior shaft of fibula; and interosseous membrane Quadratus Plantae Posterior, lateral aspect of flexor digitorum longus tendon Abductor Digiti Minimi Lateral process of calcaneus and plantar aponeurosis Extensor Digitorum Brevis Middle phalanges of second through fifth toes Lumbricals of the foot If this muscle is paralyzed the extensors will pull the toes into a "claw- like" position Lumbricals of the foot First: Tibial L4, 5, S1 Second through fourth: Tibial L(4), (5), S1, 2 Abductor Hallucis Tibial L4, 5, S1 Gastrocnemius Acts as a crucial part of the circulatory system in the lower leg ("Second Heart") Abductor Digiti Minimi Flex the fifth toe and assists to abduct the fifth toe (metatarsophalangeal joint) Gastrocnemius Calcaneus via calcaneal tendon Dorsal Interossei Adjacent surfaces of all metatarsals Popliteus Proximal, posterior aspect of tibia Tibialis Anterior Medial cuneiform and base of the first metatarsal Fibularis Longus Superficial Fibular L4, 5, S1 Tibialis Posterior Proximal, posterior shafts of tibia and fibula; and interosseous membrane Flexor Hallucis Longus Distal phalanx of first toe Plantar Interossei Tibial S1,2 Fibularis Brevis Evert the foot, assist to plantar flex the ankle (talocrural joint) Popliteus Acts as the "key to the knee" in locking the tibiofemoral joint Fibularis Brevis Strongest Abductor of the Foot Popliteus Medially rotate the flexed knee (tibiofemoral joint) and flex the knee (T/F joint) Extensor Digitorum Longus Middle and distal phalanges of second through fifth toes Flexor Hallucis Longus Flex the first toe (metatarsophalangeal and interphalangeal joints), weak plantar flexion of ankle (talocrural joint), invert the foot Quadratus Plantae Can also be referred to as the "Flexor Digitorum Accessorius" Flexor Digitorum Longus The Flexor Hallucis Longus and this muscle form a junction known as the "Knot of Henry" Fibularis Longus Base of first metatarsal and medial cuneiform Extensor Hallucis Brevis Extend the first toe (metatarsophalangeal joint) Flexor Digitorum Brevis Tibial L4, 5, S1 Flexor Digitorum Longus Tibial L5, S1, (2) Extensor Hallucis Longus Deep Fibular L4, 5, S1 Extensor Digitorum Longus Lateral part of this muscle splits to become the fibularis tertius Flexor Digiti Minimi Brevis Tibial S1, 2 Adductor Hallucis If this muscle becomes tight or overworked it can create bunions Adductor Hallucis Tibial S1, 2 Extensor Digitorum Brevis Extend second through fourth toes (metatarsophalangeal and interphalangeal joints) Flexor Hallucis Brevis Contain the two sesamoid bones of the hallux in its "Y- shaped" tendons Extensor Digitorum Brevis Dorsal surface of calcaneus Plantaris Weak plantar flexion of the ankle (talocrural joint) and weak flexion of the knee (tibiofemoral joint) Tibialis Anterior Invert the foot and Dorsiflex the ankle (talocrural joint) Dorsal Interossei Abduct 2nd-4th toes and flex the 2nd-4th toes (metatarsophalangeal joint) Flexor Digiti Minimi Brevis Base of proximal phalanx of fifth toe Plantar Interossei Medial surfaces of 3rd-5th metatarsals Extensor Hallucis Longus Doctors can use the strength of this muscle to test for L5 nerve issues Extensor Hallucis Brevis Proximal Phalanx of first toe Soleus Plantar Flex the ankle (talocrural joint) Tibialis Posterior Tibial L(4), 5, S1 Flexor Hallucis Brevis Plantar surfaces of cuboid and lateral cuneiform Plantaris Lateral supracondylar line of femur Soleus Soleal line; proximal, posterior surface of tibia; and posterior aspect of head of fibula
(Print)
O-Lateral condyle of tibia; proximal, anterior shaft of fibula; and interosseous membrane
I-Posterior, lateral aspect of flexor digitorum longus tendon
O-Lateral process of calcaneus and plantar aponeurosis
I-Middle phalanges of second through fifth toes
M-If this muscle is paralyzed the extensors will pull the toes into a "claw-like" position
N-First: Tibial L4, 5, S1
Second through fourth: Tibial L(4), (5), S1, 2
N-Tibial L4, 5, S1
M-Acts as a crucial part of the circulatory system in the lower leg ("Second Heart")
A-Flex the fifth toe and assists to abduct the fifth toe (metatarsophalangeal joint)
I-Calcaneus via calcaneal tendon
O-Adjacent surfaces of all metatarsals
I-Proximal, posterior aspect of tibia
I-Medial cuneiform and base of the first metatarsal
N-Superficial Fibular L4, 5, S1
O-Proximal, posterior shafts of tibia and fibula; and interosseous membrane
I-Distal phalanx of first toe
N-Tibial S1,2
A-Evert the foot, assist to plantar flex the ankle (talocrural joint)
M-Acts as the "key to the knee" in locking the tibiofemoral joint
M-Strongest Abductor of the Foot
A-Medially rotate the flexed knee (tibiofemoral joint) and flex the knee (T/F joint)
I-Middle and distal phalanges of second through fifth toes
A-Flex the first toe (metatarsophalangeal and interphalangeal joints), weak plantar flexion of ankle (talocrural joint), invert the foot
M-Can also be referred to as the "Flexor Digitorum Accessorius"
M-The Flexor Hallucis Longus and this muscle form a junction known as the "Knot of Henry"
I-Base of first metatarsal and medial cuneiform
A-Extend the first toe (metatarsophalangeal joint)
N-Tibial L4, 5, S1
N-Tibial L5, S1, (2)
N-Deep Fibular L4, 5, S1
M-Lateral part of this muscle splits to become the fibularis tertius
N-Tibial S1, 2
M-If this muscle becomes tight or overworked it can create bunions
N-Tibial S1, 2
A-Extend second through fourth toes (metatarsophalangeal and interphalangeal joints)
M-Contain the two sesamoid bones of the hallux in its "Y-shaped" tendons
O-Dorsal surface of calcaneus
A-Weak plantar flexion of the ankle (talocrural joint) and weak flexion of the knee (tibiofemoral joint)
A-Invert the foot and Dorsiflex the ankle (talocrural joint)
A-Abduct 2nd-4th toes and flex the 2nd-4th toes (metatarsophalangeal joint)
I-Base of proximal phalanx of fifth toe
O-Medial surfaces of 3rd-5th metatarsals
M-Doctors can use the strength of this muscle to test for L5 nerve issues
I-Proximal Phalanx of first toe
A-Plantar Flex the ankle (talocrural joint)
N-Tibial L(4), 5, S1
O-Plantar surfaces of cuboid and lateral cuneiform
O-Lateral supracondylar line of femur
O-Soleal line; proximal, posterior surface of tibia; and posterior aspect of head of fibula
