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