Leg, Ankle, and Foot Flashcards
Tibialis anterior
O: Upper third of the tibial lateral face and interosseous membrane
I: Medial cuneiform and first metatarsal
A: Ankle dorsiflexion and foot inversion
In: Fibular n.
Extensor digitorum longus
O: Lateral tibia, fibula capsule and interosseous membrane
I: Middle and distal phalanges II-V
A: Ankle dorsiflexion and foot eversion
Inter-phalangeal (IP) and metatarso-phalangeal (MTP) joint 2-5 extension
In: Fibular n.
Extensor hallucis longus
O: Anterior face of the fibula, interosseous membrane
I: Distal phalanx of hallux
A: Ankle dorsiflexion and foot inversion
IP and MTP joint 1: extension
In: Fibular n.
Fibularis (peroneus) longus
O: Head and proximal 2/3 of the lateral face of the fibula
I: Base of the 1st metatarsal and medial cuneiform
A: Ankle plantar flexion and foot eversion
In: Superficial fibular n.
Fibularis brevis
O: Distal half of the lateral face of the fibula
I: Base of the 5th metatarsal
A: Ankle plantar flexion and foot eversion
In: Superficial fibular n.
Gastrocnemius
O:
Lateral: lateral femoral condyle
Medial: medial femoral condyle
I: Achilles tendon
A: Knee: flexion
Ankle plantar flexion
In: Tibial n.
Soleus
O: Posterior surface of the head of fibula and soleal line on tibia
I: Achilles tendon
A: Ankle plantar flexion
In: Tibial n.
Plantaris
O: Lateral supracondylar ridge, knee joint capsule
I: Achilles tendon
A: Very weak plantarflexor
In: Tibial n.
Tibialis posterior
O: Interosseous membrane, borders of tibia and fibula
I: Mainly navicular but also medial cuneiform
A: Ankle plantar flexion and foot inversion
Supports longitudinal and transverse arches of the foot
In: Tibial n.
Flexor digitorum longus
O: Middle third of the posterior surface of the tibia
I: Bases of the distal phalanges 2-5
A: Ankle plantar flexion and foot inversion
MTP and IP joint II-V flexion
Supports longitudinal and transverse arches of the foot
In: Tibial n.
Flexor hallucis longus
O: Distal 2/3 of posterior fibula and interosseous membrane
I: Bases of the distal phalanx of hallux
A: Ankle plantar flexion and foot inversion;
Hallux MTP and IP joint flexion
Supports longitudinal arch of the foot
In: Tibial nerve
Popliteus
O: Lateral femoral condyle and posterior horn of the lateral meniscus
I: Posterior surface of tibia proximal to soleal line
A: Flexes and unlocks the knee by externally rotating the femur on the fixed tibia
In: Tibial n.
