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The tibialis anterior muscle is a muscle of the anterior compartment of the lower leg. It originates from the upper portion of the tibia; it inserts into the medial cuneiform and first metatarsal bones of the foot. It acts to dorsiflex and invert the foot. This muscle is mostly located near the shin.
Three muscles attach to the first metatarsal bone: the tibialis anterior, fibularis longus and first dorsal interosseus. [3] The tibialis anterior inserts at the basis of the bone, while the fibularis longus inserts at the tuberosity. The lateral part of the first dorsal interosseus muscle originates from the medial side of the bone.
The anterior compartment of the leg is supplied by the deep fibular nerve (deep peroneal nerve), a branch of the common fibular nerve. The nerve contains axons from the L4, L5, and S1 spinal nerves. Blood for the compartment is supplied by the anterior tibial artery, which runs between the tibialis anterior and extensor digitorum longus muscles.
Tibialis anterior: Insertion: Basis of first metatarsal: Peroneous tertius: Insertion: Dorsal side basis of fifth metatarsal: Peroneous longus: Insertion: Tuberosity of first metatarsal: Peroneous brevis: Insertion: Tuberosity of fifth metatarsal: Horizontal head of adductor hallucis: Origin: Deep transverse metatarsal ligament: Flexor digiti ...
The tibialis anterior and fibularis longus muscle inserts at the medial cuneiform bone. [ 2 ] The intermediate cuneiform ( second cuneiform or middle cuneiform ) is shaped like a wedge, the thin end pointing downwards.
Between it and the tibialis anterior are the upper portions of the anterior tibial vessels and deep peroneal nerve. The muscle passes under the superior and inferior extensor retinaculum of foot in company with the fibularis tertius , and divides into four slips, which run forward on the dorsum of the foot, and are inserted into the second and ...
A compartment space is anatomically determined by an unyielding fascial (and osseous) enclosure of the muscles.The anterior compartment syndrome of the lower leg (often referred to simply as anterior compartment syndrome), can affect any and all four muscles of that compartment: tibialis anterior, extensor hallucis longus, extensor digitorum longus, and peroneus tertius.
Pes anserinus inserts onto the anteromedial (front and inside) surface of the proximal tibia. The muscles are the sartorius , gracilis and semitendinosus sometimes referred to as the guy ropes . The name "goose foot" arises from the three-pronged manner in which the conjoined tendon inserts onto the tibia.