Abductor Digiti Minimi Originates on the lateral process of calcaneus and plantar aponeurosis. Soleus Sometimes called the "second heart" because of its important role in its strong contractions returning blood from the leg to the heart. Dorsal Interossei Abducts the 2nd-4th toes, and flexes the 2nd-4th toes. Gracilis Innervates the Obturator L2, 3, 4 nerve. Plantaris This muscle has the longest tendon in the body. Flexor Digitorum Brevis Inserts on the middle phalanges of second through fifth toes. Semimembranosus Innervates the Sciatic (tibial branch) L4, 5, S1, 2 nerve. Semitendinosus Inserts on the proximal, medial shaft of the tibia at the pes anserinus tendon. Popliteus Has the nickname "the key which unlocks the knee." Vastus Intermedius Originates on the anterior and lateral shaft of the femur. Extensor Hallucis Brevis Inserts on the proximal phalanx of first toe. Biceps Femoris Has 2 heads- a superficial long head and a deeper short head. Tensor Fasciae Latae Innervates the Superior Gluteal L4, 5, S1 nerve. Abductor Hallucis Abducts the first toe, and assists to flex the first toe. Vastus Medialis Forms a "teardrop" shape. Extensor Digitorum Brevis Originates on the dorsal surface of calcaneus. Flexor Digitorum Longus Inserts on the distal phalanges of second through fifth toes. Adductor Hallucis Innervates the Tibial S1, 2 nerve. Extensor Digitorum Longus Originates on the lateral condyle of tibia; proximal, anterior shaft of fibula; and interosseous membrane. Tibialis Anterior Inverts the foot and dorsiflex the ankle. Fibularis Brevis Inserts at the tuberosity of the fifth metatarsal. Flexor Digiti Minimi Brevis Flexes the fifth toe. Flexor Hallucis Brevis Innervates the Tibial L4, 5, S1 nerve. Fibularis Longus Originates at the head of the fibula and proximal two- thirds of lateral fibula. Lumbricals of the Foot The first innervates the Tibial L4, 5, S1 and the 2nd-4th innervates the Tibial L(4), (5), S1, 2 nerve. Sartorius This is the longest muscle in the body. Gastrocnemius Flexes the knee and plantar flexes the ankle Plantar Interossei Inserts on the medial surfaces of proximal phalanges of 3rd-5th toes. Vastus Lateralis Innervates the Femoral L2, 3, 4 nerve. Quadratus Plantae Originates on the medial and lateral sides of plantar surface of calcaneus. Flexor Hallucis Longus Flexes the first toe, weak plantar flexion of ankle, and inverts the foot. Tibialis Posterior Inserts on all five tarsal bones and bases of 2nd- 4th metatarsals. Extensor Hallucis Longus Extends the first toe, dorsiflex the ankle, and inverts the foot. Rectus Femoris The only quadriceps muscle to cross two joints. Abductor Digiti Minimi Originates on the lateral process of calcaneus and plantar aponeurosis. Soleus Sometimes called the "second heart" because of its important role in its strong contractions returning blood from the leg to the heart. Dorsal Interossei Abducts the 2nd-4th toes, and flexes the 2nd-4th toes. Gracilis Innervates the Obturator L2, 3, 4 nerve. Plantaris This muscle has the longest tendon in the body. Flexor Digitorum Brevis Inserts on the middle phalanges of second through fifth toes. Semimembranosus Innervates the Sciatic (tibial branch) L4, 5, S1, 2 nerve. Semitendinosus Inserts on the proximal, medial shaft of the tibia at the pes anserinus tendon. Popliteus Has the nickname "the key which unlocks the knee." Vastus Intermedius Originates on the anterior and lateral shaft of the femur. Extensor Hallucis Brevis Inserts on the proximal phalanx of first toe. Biceps Femoris Has 2 heads- a superficial long head and a deeper short head. Tensor Fasciae Latae Innervates the Superior Gluteal L4, 5, S1 nerve. Abductor Hallucis Abducts the first toe, and assists to flex the first toe. Vastus Medialis Forms a "teardrop" shape. Extensor Digitorum Brevis Originates on the dorsal surface of calcaneus. Flexor Digitorum Longus Inserts on the distal phalanges of second through fifth toes. Adductor Hallucis Innervates the Tibial S1, 2 nerve. Extensor Digitorum Longus Originates on the lateral condyle of tibia; proximal, anterior shaft of fibula; and interosseous membrane. Tibialis Anterior Inverts the foot and dorsiflex the ankle. Fibularis Brevis Inserts at the tuberosity of the fifth metatarsal. Flexor Digiti Minimi Brevis Flexes the fifth toe. Flexor Hallucis Brevis Innervates the Tibial L4, 5, S1 nerve. Fibularis Longus Originates at the head of the fibula and proximal two- thirds of lateral fibula. Lumbricals of the Foot The first innervates the Tibial L4, 5, S1 and the 2nd-4th innervates the Tibial L(4), (5), S1, 2 nerve. Sartorius This is the longest muscle in the body. Gastrocnemius Flexes the knee and plantar flexes the ankle Plantar Interossei Inserts on the medial surfaces of proximal phalanges of 3rd-5th toes. Vastus Lateralis Innervates the Femoral L2, 3, 4 nerve. Quadratus Plantae Originates on the medial and lateral sides of plantar surface of calcaneus. Flexor Hallucis Longus Flexes the first toe, weak plantar flexion of ankle, and inverts the foot. Tibialis Posterior Inserts on all five tarsal bones and bases of 2nd- 4th metatarsals. Extensor Hallucis Longus Extends the first toe, dorsiflex the ankle, and inverts the foot. Rectus Femoris The only quadriceps muscle to cross two joints.
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O-Originates on the lateral process of calcaneus and plantar aponeurosis.
M-Sometimes called the "second heart" because of its important role in its strong contractions returning blood from the leg to the heart.
A-Abducts the 2nd-4th toes, and flexes the 2nd-4th toes.
N-Innervates the Obturator L2, 3, 4 nerve.
M-This muscle has the longest tendon in the body.
I-Inserts on the middle phalanges of second through fifth toes.
N-Innervates the Sciatic (tibial branch) L4, 5, S1, 2 nerve.
I-Inserts on the proximal, medial shaft of the tibia at the pes anserinus tendon.
M-Has the nickname "the key which unlocks the knee."
O-Originates on the anterior and lateral shaft of the femur.
I-Inserts on the proximal phalanx of first toe.
M-Has 2 heads- a superficial long head and a deeper short head.
N-Innervates the Superior Gluteal L4, 5, S1 nerve.
A-Abducts the first toe, and assists to flex the first toe.
M-Forms a "teardrop" shape.
O-Originates on the dorsal surface of calcaneus.
I-Inserts on the distal phalanges of second through fifth toes.
N-Innervates the Tibial S1, 2 nerve.
O-Originates on the lateral condyle of tibia; proximal, anterior shaft of fibula; and interosseous membrane.
A-Inverts the foot and dorsiflex the ankle.
I-Inserts at the tuberosity of the fifth metatarsal.
A-Flexes the fifth toe.
N-Innervates the Tibial L4, 5, S1 nerve.
O-Originates at the head of the fibula and proximal two-thirds of lateral fibula.
N-The first innervates the Tibial L4, 5, S1 and the 2nd-4th innervates the Tibial L(4), (5), S1, 2 nerve.
M-This is the longest muscle in the body.
A-Flexes the knee and plantar flexes the ankle
I-Inserts on the medial surfaces of proximal phalanges of 3rd-5th toes.
N-Innervates the Femoral L2, 3, 4 nerve.
O-Originates on the medial and lateral sides of plantar surface of calcaneus.
A-Flexes the first toe, weak plantar flexion of ankle, and inverts the foot.
I-Inserts on all five tarsal bones and bases of 2nd-4th metatarsals.
A-Extends the first toe, dorsiflex the ankle, and inverts the foot.
M-The only quadriceps muscle to cross two joints.
