Muscle Chart: Posterior Leg Compartment Flashcards

1
Q

Gastrocnemius

Origin, Insertion, Innervation, Blood Supply

A

Origin: Condyles of the femur (posterior surface)

Insertion: Calcaneus via the calcanea tendon

Innervation: Tibial nerve (L5, S1, S2)

Blood Supply: Posterior tibial artery

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2
Q

Gastrocnemius Movements

A

Plantar flexes the ankle

Flexes the knee

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3
Q

Soleus

Origin, Insertion, Innervation, Blood Supply

A

Origin: Soleal line (proximal), posterior surface of tibia and posterior aspect of head of fibula

Distal: Calcaneus vis the calcanea tendon

Innervation: Tibial nerve (L5, S1, S2)

Blood Supply: Posterior tibial artery

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4
Q

Soleus Movements

A

Plantar flexes the ankle

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5
Q

Plantaris

Origin, Insertion, Innervation, Blood Supply

A

Origin: Lateral supracondylar line of the femur

Insertion: Calcaneus vis the calcanea tendon

Innervation: Tibial nerve (L4, L5, S1, S2)

Blood Supply: Posterior tibial artery

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6
Q

Plantaris Movements

A

Weak plantar flexion of the ankle

Weak flexion of the knee

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7
Q

Flexor Hallucis Longus

Origin, Insertion, Innervation, Blood Supply

A

Origin: Middle 1/2 of posterior fibula

Insertion: Plantar surface of the distal phalanx

Innervation: Tibial nerve (S2, S3)

Blood Supply: Fibular and posterior tibial

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8
Q

Flexor Hallucis Longus Movements

A

Flexes digit 1

Very weak plantar flexion

Invert foot

Supports longitudinal arch of the foot

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9
Q

Flexor Digitorum Longus

Origin, Insertion, Innervation, Blood Supply

A

Origin: Middle posterior surface of tibia

Insertion: Distal phalanges of digits 2-5

Innervation: Tibial nerve (S2, S3)

Blood Supply: Posterior tibial artery

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10
Q

Flexor Digitorum Longus Movements

A

Flexes digits 2-5

Weak plantar flexion

Inversion of foot

Supports longitudinal arch of foot

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11
Q

Posterior Tibialis

Origin, Insertion, Innervation, Blood Supply

A

Origin: Proximal posterior shaft of tibia and fibula; interosseous membrane

Insertion: All 5 tarsal bones and bases of 2-4 metatarsals

Innervation: Tibial nerve (L4, L5, S1)

Blood Supply: Posterior tibial

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12
Q

Posterior Tibialis Movements

A

Plantar flexes the ankle

Inverts foot

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