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