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