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Anterior Leg OINA

Anterior Leg OINAs

QuestionAnswer
Tibialis Anterior Origin Lateral condyle of tibia, upper half of lateral surface of shaft of tibia, interosseous membrane.
Tibialis Anterior Insertion Tendon passes under extensor retinacula > inserts into medial cuneiform and base of 1st metatarsal.
Tibialis Anterior Nerve Deep Fibular Nerve
Tibialis Anterior Action Dorsiflexion of foot at ankle joint, inversion of foot at subtalar and transverse tarsal joints, assists in holding up medial longitudinal arch of foot.
Extensor Digitorum Longus Origin Lateral condyle of tibia, upper ¾ of anterior surface of shaft of fibula, interosseous membrane.
Extensor Digitorum Longus Insertion Muscle belly gives rise to 4 tendons which pass under extensor retinacula. each tendon divides into 3 slips > central slip inserts into base of middle phalanx > 2 lateral slips join and insert into base of distal phalanx
Extensor Digitorum Longus Nerve Deep Fibular Nerve
Extensor Digitorum Longus Action Extension of lateral 4 toes, dorsiflexion of foot at ankle joint.
Extensor Hallucis Longus Origin Middle part of anterior surface of shaft of fibula and interosseous membrane.
Extensor Hallucis Longus Insertion Tendon passes under extensor retinacula and inserts into base of distal phalanx of big toe.
Extensor Hallucis Longus Nerve Deep Fibular Nerve
Extensor Hallucis Longus Action Extension of big toe, dorsiflexion of foot at ankle, assists in inversion of foot at subtalar and transvers tarsal joints.
Fibularis Tertius Origin Lower third of anterior surface of shaft of fibula and interosseous membrane.
Fibularis Tertius Insertion Tendon passes under extensor retinacula and inserts into dorsal aspect of base of shaft of 5th metatarsal.
Fibularis Tertius Nerve Deep fibular nerve
Fibularis Tertius Action Dorsiflexion of foot at ankle, eversion of foot at subtalar and transverse tarsal joints.
Fibularis Longus Origin Lateral surface of head of fibula, and upper part of lateral surface of shaft of fibula.
Fibularis Longus Insertion inserts into medial cuneiform and base of 1st metatarsal.
Fibularis Longus Nerve Superficial fibular nerve
Fibularis Longus Action Plantar flexion of foot at ankle joint, eversion of foot at subtalar and transvers tarsal joints, helps to maintain lateral longitudinal and transverse arches of foot.
Fibularis Brevis Origin Lower part of lateral surface of shaft of fibula.
Fibularis Brevis Insertion inserts into tuberosity of base of 5th metatarsal
Fibularis Brevis Nerve Superficial fibular nerve
Fibularis Brevis Action Plantar flexion of foot at ankle, eversion of foot at subtalar and transverse tarsal joints, assists in holding up lateral longitudinal arch of foot.
Created by: MichaelR