University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

45

Pages:

2
Author:

Mariam A. A.

MUSCLES OF THE LEG Anterior Leg Muscles Name Tibialis Anterior Origin Proximal lateral tibia condyle Extensor Hallucis longus Extensor Digitorum Longus Fibularis (peroneus) tertius Medial fibula and interosseus membrane Lateral tibia condyle and sup. ¾ of fibula Distal third of fibula and interosseous membrane Insertion Med. and inf. surfaces of medial cuneiform and base of 1stmetatarsa Base of distal phalanx of big toe Base of middle and distal phalanges (4 smaller toes) Base of 5th metatarsal Innervation Deep peroneal nerve Function Dorsiflex & invert of the foot Deep peroneal nerve Deep peroneal nerve Dorsiflex and extend big toe Deep peroneal nerve Dorsiflex and weak eversion Insertion Plantar medial cuneiform, 1st metatarsal base Base of 5th metatarsal Innervation Superficial fibular nerve Function Plantar flex/stabilization when standing Superficial fibular nerve Foot eversion Dorsiflexion and toe extension Lateral Leg Muscles Name Fibularis longus Origin Proximal lateral fibula (head) Fibularis brevis Distal lateral fibula Posterior Leg Muscles Important Note: all muscles of the posterior leg except for popliteus are considered extrinsic muscles of the foot Name Origin Gastrocnemius Lateral and medial femoral condyles Soleus Posterior fibular head and soleal line of tibia Plantaris Lateral femoral supracondylar ridge Popliteus Lateral femoral condyle Insertion Calcaneus via calcaneal tendon Calcaneus via calcaneal tendon Calcaneus via calcaneal tendon Proximal posterior tibia Innervation Tibial nerve Function Plantarflexion Tibial nerve Plantarflexion Tibial nerve Weak plantarflexion Tibial nerve Flexor Digitorum Flexor Hallusis Longus Tibialis Posterior Base of distal phalanx of big toe Bases of distal phalanges Tibial nerve Weak knee flexor, unlocks knee by weak internal rotation Big toe flexion Tibial nerve Toe (plantar) flexion Posterior fibula Posterior tibia Posterior tibia, posterior fibula and interosseous membrane Plantar surface of cuneiform and navicular Plantar flexion and invert foot joints and bases of metatarsals 2-4 Blood vessels and nerves For the following blood vessels and nerves, identify the origin, course, and major branches Arteries • • Posterior tibial - Peroneal - Fibular Anterior tibial Veins • • Superficial - Great saphenous - Small saphenous Deep veins - Venae Commitantes of arteries - Venae Commitantes of arteries Nerves • • Tibial - Sural Common fibular (either fibular or peroneus can be used) - Superficial fibular (either fibular or peroneus can be used) - Deep fibular (either fibular or peroneus can be used)