Muscles Flashcards
Which muscles are ankle extensors?
- Tibialis Anterior
- Extensor Hallicus Longus
- Extensor Digitorum Longus
Which muscles are ankle flexors?
- Gastrocnemius
- Soleus
- Plantaris
- Tibialis Posterior
- Flexor Hallicus Longus
- Flexor Digitorum Longus
- Peroneus (Fibularis) Longus
- Peroneus (Fibularis) Brevis
- Popliteus
Which muscles ALL distally attach at the calcaneal tuberosity?
- Gastrocnemius
- Soleus
- Plantaris
Tibialis Anterior: Actions
- Inverts the foot
- Dorsiflxes the ankle
Tibialis Anterior: Origin
- Lateral condyle of tibia
- Proximal lateral surface of tibia
- Interosseous membrane
Tibialis Anterior: Insertion
- Medial Cuneiform
- Base of First Metatarsal
Extensor Hallucis Longus: Action
- Extends the first toe
- Dorsiflexes the ankle
- Inverts the foot
Extensor Hallicus Longus: Origin
- Middle, anterior surface of fibula
- Interosseous membrane
Extensor Hallicus Longus: Insertion
Distal phalanx of first toe
Extensor Digitorum Longus: Action
- Extends 2nd - 5th toes
- Dorsiflexes the ankle
- Everts the foot
Extensor Digitorum Longus: Origin
- Lateral Condyle of Tibia
- Proximal Anterior shaft of Fibula
- Interosseous Membrane
Extensor Digitorum Longus: Insertion
Middle and Distal phalanges of 2nd - 5th toes
Tibialis Posterior: Action
- Inverts the foot
- Plantar Flexes the ankle
Tibialis Posterior: Origin
- Proximal, posterior shafts of tibia and fibula
- Interosseous Membrane
Tibialis Posterior: Insertion
- All 5 tarsal bones
- Bases of 2nd - 4th metatarsals
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