出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2019/06/13 01:26:16」(JST)
| Tibialis anterior muscle | |
|---|---|
Lateral aspect of right leg. | |
Tibialis anterior | |
| Details | |
| Pronunciation | /ˌtɪbiˈeɪlɪs/ or /ˌtɪbiˈælɪs/ |
| Origin | From the upper 1/2 or 2/3 of the lateral surface of the tibia and the adjacent interosseous membrane |
| Insertion | Medial cuneiform and the base of first metatarsal bone of the foot |
| Artery | Anterior tibial artery |
| Nerve | Deep Fibular (peroneal) nerve (L5) |
| Actions | Dorsiflexion and inversion of the foot |
| Antagonist | Fibularis longus, Gastrocnemius, Soleus, Plantaris, Tibialis posterior |
| Identifiers | |
| Latin | musculus tibialis anterior |
| TA | A04.7.02.037 |
| FMA | 22532 |
| Anatomical terms of muscle [edit on Wikidata] | |
The tibialis anterior is a muscle in humans that originates in the upper two-thirds of the lateral (outside) surface of the tibia and 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.
It is situated on the lateral side of the tibia; it is thick and fleshy above, tendinous below. The tibialis anterior overlaps the anterior tibial vessels and deep peroneal nerve in the upper part of the leg.
It arises from the lateral condyle and upper half or two-thirds of the lateral surface of the body of the tibia; from the adjoining part of the interosseous membrane; from the deep surface of the fascia; and from the intermuscular septum between it and the extensor digitorum longus.
The fibers of this circumpennate muscle are relatively parallel to the plane of insertion, ending in a tendon, apparent on the anteriomedial dorsal aspect of the foot close to the ankle.
After passing through the most medial compartments of the transverse and cruciate crural ligaments, it is inserted into the medial and under surface of the medial cuneiform bone and the base of the first metatarsal bone.
Deep peroneal (fibular) nerve, branch of common peroneal (fibular) nerve (L4, L5, S1).
A deep portion of the muscle is rarely inserted into the talus, or a tendinous slip may pass to the head of the first metatarsal bone or the base of the first phalanx of the great toe.
The tibiofascialis anterior, a small muscle from the lower part of the tibia to the transverse or cruciate crural ligaments or deep fascia.[clarification needed]
The tibialis anterior muscle is the most medial muscle of the anterior compartment of the leg. It is responsible for dorsiflexing and inverting the foot. The muscle has two origins, one being the lateral tibial condyle and the other being the upper lateral surface of the tibia, and inserts on the medial surface of the medial cuneiform and adjoining part of base of the first metatarsal of the foot allowing the toe to be pulled up and held in a locked position. It also allows for the ankle to be inverted giving the ankle horizontal movement allowing for some cushion if the ankle were to be rolled. It is innervated by the deep peroneal nerve and acts as both an antagonist and a synergist of the tibialis posterior. However, the most accurate antagonist of the tibialis anterior is the peroneus longus. The tibialis anterior aides in the activities of walking, running, hiking, kicking a ball, or any activity that requires moving the leg or keeping the leg vertical. It functions to stabilize the ankle as the foot hits the ground during the contact phase of walking (eccentric contraction) and acts later to pull the foot clear of the ground during the swing phase (concentric contraction). It also functions to 'lock' the ankle, as in toe-kicking a ball, when held in an isometric contraction.
Antagonists are plantar-flexors of the posterior compartment such as soleus and gastrocnemius.
The movements of tibialis anterior are dorsiflexion and inversion of the ankle. However, actions of tibialis anterior are dependent on whether the foot is weight bearing or not (closed or open kinetic chain). When the foot is on the ground, the muscle helps to balance the leg and talus on the other tarsal bones so that the leg is kept vertical even when walking on uneven ground.
medial view of dissected ankle has two muscles
Anatomical terms of motion
Cross-section through middle of leg.
Tibialis anterior muscle
Dorsum and sole of Foot. Ankle joint. Deep dissection. *This has some muscles labelled incorrectly eg peroneus longus and peroneus brevis do not lie medial to the ankle joint and calcaneum.
Ankle joint. Deep dissection. Lateral view *This has some structures labelled incorrectly eg tibialis anterior, extensor hallucis longus and cuboid bone
This article incorporates text in the public domain from page 480 of the 20th edition of Gray's Anatomy (1918)
| Wikimedia Commons has media related to Tibialis anterior muscle. |
Muscles of the hip and human leg | |||||||||||||||||
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| Iliac region |
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| リンク元 | 「深腓骨神経」「前脛骨筋」 |
| 関連記事 | 「anterior」「tibial」「tibialis」 |
坐骨神経→'総腓骨神経'+脛骨神経 '総腓骨神経'→浅腓骨神経＋深腓骨神経
| 肉単P | 筋名 | 起始 | 停止 | 支配神経 | 機能 |
| V-1 | 前脛骨筋 | 脛骨(外側面)、骨間膜 | 内側楔状骨、第1中足骨(基底部) | 深腓骨神経 | 足関節の背屈・内反、足底のアーチ維持 |
| V-4 | 第三腓骨筋 | 腓骨（下部の前面) | 第5中足骨(基底部) | 深腓骨神経 | 足関節の外反・背屈 |
| V-5 | 長趾伸筋 | 脛骨(外側顆)、腓骨(前縁上方) | 第2-5指(基、中、末節骨底の背面) | 深腓骨神経 | 第2-5趾の伸展 |
| V-6 | 長母趾伸筋 | 腓骨（及び骨間膜の前面) | 母趾(末節骨底の背面) | 深腓骨神経 | 母趾の伸展(IP関節) |
足関節の背屈＞:足関節の背屈
Henry Gray (1825-1861). Anatomy of the Human Body. 1918.