Muscles of the Legs

Muscle The tibialis anterior Origin Lateral surface of the shaft of tibia. Insertion ^_^ Nerve Supply Deep peroneal nerve. Blood Supply Anterior tibial artery. Action -Dorsiflexion (to stand up on the heels). [AKA extension of the foot at the ankle joint]. - invert the foot at subtalar and transverse tarsal joints. Extensor digitorum longus The anterior surface of shaft of fibula. ^_^ Deep peroneal nerve. Anterior tibial artery. -Dorsiflexion (to stand up on the heels). [AKA extension of the foot at the ankle joint and the 4 lateral toes]. ^_^ Deep peroneal nerve. Anterior tibial artery. -Dorsiflexion (to stand up on the heels). [AKA extension of the foot at the ankle joint and the big toe]. ^_^ Deep peroneal nerve. Anterior tibial artery. Extensor hallucis longus Peroneus tertius -Dorsiflexion (to stand up on the heels). [AKA extension of the foot at the ankle joint]. - Everts foot at subtalar and transverse tarsal joints. Image Muscle Origin Insertion Nerve Supply Blood Supply Action Image Remember: The arrangement of the muscles from medial to lateral in front of the medial malleolus is summarized with the mnemonic: Tom Has Very Nice Dogs & Pigs. T = Tibialis anterior H = Extensor hallucis longus V = Vessels Peroneus longus lateral surface of shaft of fibula. N = Nerve D = Extensor digitorum longus P = Peroneus tertius Base of first metatarsal and the medial cuneiform bone (passes through a groove in the Cuboid bone). Superficial peroneal nerve. Peroneal=fibular Branches from the peroneal artery (branch from posterior tibial artery). -flex the foot at the ankle joint. -Evert the foot at the subtalar and transverse tarsal joints. Peroneus brevis ^_^ (Superficial group of muscles) Gastrocnemius Lateral head: lateral condyle of femur. Medial head: above medial condyle. Via tendo calcaneus into posterior surface of calcaneum. Tibial nerve. Posterior tibial artery. - Flex ankle (plantar flexion, standing on the tip of your toes). - powerful plantar flexor of ankle joint; provides main propulsive force in walking and running. -Flexes knee joint. Muscle Origin Insertion Plantaris Nerve Supply Blood Supply Tibial nerve. Posterior tibial artery. Powerful plantar flexor of ankle joint; provides main propulsive force in walking and running. Tibial nerve. Posterior tibial artery. Powerful plantar flexor of ankle joint; provides main propulsive force in walking and running. - Soleus Shafts of tibia and fibula. Via tendo calcaneus into posterior surface of calcaneum. Action Posterior facial compartment of the leg (Deep group of muscles) Popliteus  Posterior tibial artery. Unlocks the knee joint by lateral rotation of femur on tibia. Tibial nerve. Posterior tibial artery. Flexes the distal phalanges of the lateral 4 toes. Plantarflexion of the foot at the ankle joint ^_^ Flexor digitorum longus  Tibial nerve. ^_^ Image Muscle Origin Insertion Flexor hallucis longus  ^_^ Blood Supply Action Tibial nerve. Posterior tibial artery. Flexes the distal phalanx of the big toe. Plantarflexion of the foot at the ankle joint. Tibial nerve. Posterior tibial artery. Plantarflexion of the foot at the ankle joint. Inverts foot at subtalar and transverse tarsal joint. ^_^ Tibialis posterior  Nerve Supply Image Remember: The arrangement of the muscles from medial to lateral behind the medial malleolus is summarized with the mnemonic: Tom Does Very Nice Hats T = Tibialis posterior H = Flexor hallucis longus V = Vessels (posterior tibial artery) N = Nerve (tibial nerve) D = Extensor digitorum longus Mnemonics for the compartments of the leg  Anterior fascial compartment of the leg: Teena has 2 Eraser & 1 Pencil. Tibialis & 3 Extensor & 1 Peroneus.  Lateral fascial compartment of the leg: Leena has 2 Pencils. Lateral has 2 Peroneus.  Posterior fascial compartment of the leg (Superficial group of muscles): Group of People Smiling. Gastrocnemius, Plantaris & Soleus.  Posterior facial compartment of the leg (Deep group of muscles): Popli got Fresh Fruits from Tree. Popliteus, Flexor digitorum longus, Flexor hallucis longus & Tibialis posterior.