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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.
The anterior compartment of the leg is a fascial compartment of the lower leg.It contains muscles that produce dorsiflexion and participate in inversion and eversion of the foot, as well as vascular and nervous elements, including the anterior tibial artery and veins and the deep fibular nerve.
A patient recovering from surgery to treat foot drop, with limited plantar and dorsiflexion.. Foot drop is a gait abnormality in which the dropping of the forefoot happens out of weakness, irritation or damage to the deep fibular nerve (deep peroneal), including the sciatic nerve, or paralysis of the muscles in the anterior portion of the lower leg.
This muscle varies considerably in the modes of origin and the arrangement of its various tendons. The tendons to the second and fifth toes may be found doubled, or extra slips are given off from one or more tendons to their corresponding metatarsal bones, or to the short extensor, or to one of the interosseous muscles.
The muscle ends as a tendon of insertion. The tendon passes through a distinct compartment in the inferior extensor retinaculum of foot. It crosses anterior tibial vessels lateromedially near the bend of the ankle. [citation needed] In the foot, its tendon is situated at along the medial side of the dorsum of the foot. [1]
The fibularis tertius muscle in horses originates from the near the lateral condyle of the femur, passes through the extensor sulcus on the head of the tibia, and inserts onto the third metatarsal bone, the third and fourth tarsal bones, and the calcaneus. [8] Rupture of the muscle may cause the Achilles tendon to have a slight dip. [8]
Flexor: the toes curve down and inwards, and the foot inverts; this is the response seen in healthy adults. Indifferent: there is no response. This is called the neutral response, and has no clinical significance, as it does not rule out pathology. [5] Extensor: the hallux dorsiflexes, and the other toes fan out.
These terms refer to flexion in direction of the "back" of the foot, which is the upper surface of the foot when standing, and flexion in direction of the sole of the foot. These terms are used to resolve confusion, as technically extension of the joint is dorsiflexion, which could be considered counter-intuitive as the motion reduces the angle ...