How Do You Spell MUSCULUS TIBIALIS ANTERIOR?

1. The musculus tibialis anterior, commonly known as the anterior tibialis muscle, is a long and slender skeletal muscle located chiefly in the front part of the lower leg, specifically in the anterior compartment. The term "musculus" refers to a muscle, while "tibialis" pertains to the tibia bone, with "anterior" indicating its position in front of the leg.

   This muscle originates from the lateral condyle and the upper two-thirds of the lateral surface of the tibia bone. It extends downwards and obliquely crosses the shin bone, attaching to the inner and underside part of the medial cuneiform bone and the base of the first metatarsal bone in the foot, via its tendon known as the tibialis anterior tendon.

   The primary function of the musculus tibialis anterior is to facilitate dorsiflexion of the foot and ankle joint. It acts by pulling the soles of the feet towards the shins, enabling the toes to point upwards. This muscle additionally helps in controlling the rate of descent of the foot during walking, specifically the phase known as the swing phase.

   In addition to its crucial role in dorsiflexion, the musculus tibialis anterior also assists in foot inversion, which involves turning the sole of the foot inwards. It contributes to maintaining the proper alignment of the foot and supporting the arch, thus aiding in balance and stability during movements such as walking, running, and jumping.

2. M. tibialis anticus; origin, upper two-thirds of outer surface of tibia, interosseous membrane, and intermuscular septum; insertion, internal cuneiform and base of first metatarsal; nerve supply, deep branches of peroneal; action, dorsal flexion and supination of foot.

   A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.

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