Lower Limb / Foot Muscles Flashcards
Which muscle? Innervation? Blood supply? Action
Fibularis Longus. Everts and weakly plantarflexes ankle. Helps steady foot when standing
Proximal attachment - superior 2/3 of lateral fibula
Distal attachment - base of 1st metatarsal and medial cuneiforms
Superficial fibular nerve (L5/S1)
Perforating branches of anterior tibial and peforating arteries of fibular artery
Which muscle? Innervation? Blood supply? Action
Fibularis brevis. Everts and weakly plantarflexes ankle.
Proximal attachment - inferior 2/3 of fibula
Distal attachment - base of 5th metatarsal
Innervation - superficial fibular nerve (L5/S1)
Perforating branches of anterior tibial and peforating arteries of fibular artery
Which muscle? Innervation? Blood supply? Action
Tibialis anterior. Dorsiflexes ankle and inverts foot.
Proximal attachment - lateral condyle of tibia, superior half of lateral tibia and interosseous membrane
Distal Attachment - medial cuneiform, base of 1st metatarsal
Innervation - deep fibular nerve («L4», L5)
Which muscle? Innervation? Blood supply? Action
Extensor digitorum longus. Dorsiflexes foot and extends lateral four toes
Proximal attachment - Lateral condyle of tibia, medial surface of fibula and interosseous membrane
Distal attachment - middle and distal phalanges of lateral four toes
Innervation - deep fibular nerve («L4»,L5)
Which nerve supplies muscles of the anterior compartment of the lower limb?
Deep fibular nerve («L4»,L5)
Which nerve supplies muscles of the lateral compartment of the lower limb?
Superficial fibular nerve (L5,S1)
Which muscle? Innervation? Blood supply? Action
Extensor hallucis longus - extends great toe
Proximal attachment - middle part of anterior fibula and interosseous membrane
Distal attachment - base of distal phalanx of toe
Innervation - deep fibular nerve («L4», L5)
Which muscle? Innervation? Blood supply? Action
Fibularis tertius - dorsiflexes ankle and aids in eversion of foot
Proximal attachment - distal 1/3 of fibula and interosseous membane
Distal attachment - base of 5th metatarsal
Innervation - deep fibular nerve («L4», L5)
Which muscle? Innervation? Blood supply? Action
Plantaris - weakly assists plantarflexion
Proximal attachment - lateral supracondylar line of femur
Distal attachment - posterior calcaneus via calcaneal tendon
Innervation - tibial nerve (S1, S2)
Which muscle? Innervation? Blood supply? Action
Soleus - plantarflexes ankle
Proximal attachment - proximal posterior fibular, soleal line of tibia
Distal attachment - calcaneal tendon to calcaneus
Innervation - tibial nerve (S1,S2)
Which muscle? Innervation? Blood supply? Action
Gastrocnemius - plantarflexes ankle
Proximal attachment - Lateral head = lateral condyle of femur, medial head = medial condyle of femur
Distal attachment - calcaneal tendon
Innervation - tibial nerve (S1,S2)
Where does plantaris tendon lie in relation to gastroc and soleus?
Deep to gastroc, superficial to soleus (runs between the two muscles)
