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