Muscles Flashcards by Nathalia Davison

Which muscles are ankle extensors?

Tibialis Anterior
Extensor Hallicus Longus
Extensor Digitorum Longus

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Which muscles are ankle flexors?

Gastrocnemius
Soleus
Plantaris
Tibialis Posterior
Flexor Hallicus Longus
Flexor Digitorum Longus
Peroneus (Fibularis) Longus
Peroneus (Fibularis) Brevis
Popliteus

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Which muscles ALL distally attach at the calcaneal tuberosity?

Gastrocnemius
Soleus
Plantaris

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Tibialis Anterior: Actions

Inverts the foot
Dorsiflxes the ankle

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Tibialis Anterior: Origin

Lateral condyle of tibia
Proximal lateral surface of tibia
Interosseous membrane

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Tibialis Anterior: Insertion

Medial Cuneiform
Base of First Metatarsal

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Extensor Hallucis Longus: Action

Extends the first toe
Dorsiflexes the ankle
Inverts the foot

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Extensor Hallicus Longus: Origin

Middle, anterior surface of fibula
Interosseous membrane

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Extensor Hallicus Longus: Insertion

Distal phalanx of first toe

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Extensor Digitorum Longus: Action

Extends 2nd - 5th toes
Dorsiflexes the ankle
Everts the foot

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Extensor Digitorum Longus: Origin

Lateral Condyle of Tibia
Proximal Anterior shaft of Fibula
Interosseous Membrane

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Extensor Digitorum Longus: Insertion

Middle and Distal phalanges of 2nd - 5th toes

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Tibialis Posterior: Action

Inverts the foot
Plantar Flexes the ankle

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Tibialis Posterior: Origin

Proximal, posterior shafts of tibia and fibula
Interosseous Membrane

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Tibialis Posterior: Insertion

All 5 tarsal bones
Bases of 2nd - 4th metatarsals

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Flexor Digitorum Longus

Flexes 2nd - 5th toes
Weak plantar flexion of ankle
Inverts the foot

Flexor Digitorum Longus: Origin

Middle, posterior surface of tibia

Flexor Digitorum Longus: Insertion

Distal phalanges of 2nd - 5th toes

Flexor Hallucis Longus: Action

Flexes the 1st toe
Weak plantar flexion of ankle
Inverts foot

Flexor Hallucis Longus: Origin

Middle half of posterior fibula

Flexor Hallucis Longus: Insertion

Distal phalanx of first toe

Gastrocnemius: Action

Flexes the knee
Plantar Flexes the Ankle

Gastrocnemius: Origin

Condyles of the femur
Posterior Surfaces

Gastrocnemius: Insertion

Calcaneus via calcaneal/Achilles tendon

Soleus: Action

Plantar flexes the ankle

Soleus: Origin

- Soleal line - Proximal posterior surface of tibia - Posterior aspect of head of fibula

Soleus: Insertion

Calcaneus via calcaneal/achilles tendon

Plantaris: Action

- Weak plantar flexion of the ankle - Weak flexion of the knee

Plantaris: Origin

Lateral supracondylar line of femur

Popliteus: Action

- Medially rotates flexed knee - Flexes the knee

Plantaris: Insertion

Calcaneus via calcaneal/achilles tendon

Popliteus: Origin

Lateral condyle of the femur

Popliteus: Insertion

Proximal, posterior aspect of tibia

Peroneus (Fibularis) Longus: Action

- Everts the foot - Assists to plantar flex the ankle

Peroneus (Fibularis) Longus: Origin

- Head of fibula - Proximal two-thirds of lateral fibula

Peroneus (Fibularis) Longus: Insertion

Base of 1st metatarsal Medial cuneiform

Peroneus (Fibularis) Brevis: Action

- Everts the foot - Assists in plantar flexion of the ankle

Peroneus (Fibularis) Brevis: Origin

Distal two-thirds of lateral fibula

Peroneus (Fibularis) Brevis: Insertion

Tuberosity of 5th metatarsal