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Information about Tibialis Anterior Muscle

Lateral aspect of right leg.
Tibialis anterior
Latinmusculus tibialis anterior
subject #129 480
Origin:body of tibia
Insertion:medial cuneiform and first metatarsal bones of the foot
Artery:anterior tibial artery
Nerve: Deep Fibular (peroneal) nerve
Action:dorsiflex and invert the foot
Antagonist:Fibularis longus, Gastrocnemius, Soleus, Plantaris, Tibialis posterior
Dorlands/Elsevier m_22/12551168
In human anatomy, the tibialis anterior is a muscle in the shin that spans the length of the tibia. It originates in the upper two-thirds of the lateral surface of the tibia and inserts into the medial cuneiform and first metatarsal bones of the foot. Its acts to dorsiflex and invert the foot.

It is situated on the lateral side of the tibia; it is thick and fleshy above, tendinous below.

This muscle overlaps the anterior tibial vessels and deep peroneal nerve in the upper part of the leg.

The tibialis anterior muscle is the source of the common pain of 'shin splints' affecting many runners, either because they are underconditioned or have not yet warmed up properly.

Function

The tibialis anterior muscle is the most medial muscle of the anterior compartment of the leg. It functions to stabilise the ankle as the foot hits the ground during the contact phase of walking and acts later to pull the foot clear of the ground during the swing phase. 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.

Essentially, the movements of tibialis anterior are dorsiflexion and inversion of the foot. 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.

Origin and insertion

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 fibres of this fusiform muscle are relatively parallel to the plane on 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 first cuneiform bone, and the base of the first metatarsal bone.

Variations

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.

Additional images


Bones of the right leg. Anterior surface.

Bones of the right foot. Plantar surface.

Anatomical terms of motion

Cross-section through middle of leg.

The mucous sheaths of the tendons around the ankle. Medial aspect.

The mucous sheaths of the tendons around the ankle. Lateral aspect.


External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

 •  • [ e]
Muscles of lower limbs
ILIAC REGION/ILIOPSOASpsoas major - psoas minor - iliacus
BUTTOCKSgluteals: (maximus, medius, minimus) - tensor fasciae latae
lateral rotator group: piriformis - obturator externus - obturator internus - inferior gemellus - superior gemellus - quadratus femoris
THIGHanterior compartment: sartorius - quadriceps (rectus femoris, vastus lateralis, vastus intermedius, vastus medialis) - articularis genu
medial compartment/adductor: gracilis - pectineus - adductor brevis - adductor longus - adductor magnus
posterior compartment/hamstring: biceps femoris - semitendinosus, semimembranosus
LEGanterior compartment: tibialis anterior - extensor hallucis longus - extensor digitorum longus - fibularis tertius
posterior compartment: superficial - calf/triceps surae (gastrocnemius, soleus) - plantaris deep - popliteus - tarsal tunnel (flexor hallucis longus - flexor digitorum longus - tibialis posterior)
lateral compartment: fibularis muscles (longus - brevis)
FOOTdorsal - extensor digitorum brevis - extensor hallucis brevis
plantar first layer - abductor hallucis - flexor digitorum brevis - abductor digiti minimi
plantar second layer - quadratus plantae - lumbrical muscle
plantar third layer - flexor hallucis brevis - adductor hallucis - flexor digiti minimi brevis
plantar fourth layer - dorsal interossei - plantar interossei
Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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bold refer to the diagram at right.)

In the skull (8):
  • 1-9. cranium
  • 7. mandible
''In the middle ears (6):
  • malleus
  • incus
  • stapes
In the throat (1):
  • hyoid
In the shoulder girdle (4):
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The body of the tibia has three borders and three surfaces.

Borders

The anterior crest or border, the most prominent of the three, commences above at the tuberosity, and ends below at the anterior margin of the medial malleolus.
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bold refer to the diagram at right.)

In the skull (8):
  • 1-9. cranium
  • 7. mandible
''In the middle ears (6):
  • malleus
  • incus
  • stapes
In the throat (1):
  • hyoid
In the shoulder girdle (4):
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The medial cuneiform (also known as first cuneiform) is the largest of the cuneiforms.

It is situated at the medial side of the foot, anterior to the navicular and posterior to the base of the first metatarsal.
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The first metatarsal bone is remarkable for its great thickness, and is the shortest of the metatarsal bones.

The body is strong, and of well-marked prismoid form.
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The foot is a biological structure found in many animals that is used for locomotion. In many animals with feet, the foot is a separate organ at the terminal part of the leg made up of one or more segments or bones, generally including claws or nails.
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Arteries are muscular blood vessels that carry blood away from the heart.[1] All arteries, with the exception of the pulmonary and umbilical arteries, carry oxygenated blood.

The circulatory system is extremely important for sustaining life.
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The anterior tibial artery of the lower limb carries blood to the anterior compartment of the leg and dorsal surface of the foot, from the popliteal artery.

It is accompanied by a deep vein, the anterior tibial vein, along its course.
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  • Accessory nerve
  • Accessory obturator nerve
  • Alderman's nerve
  • Anococcygeal nerve
  • Ansa cervicalis
  • Anterior interosseous nerve
  • Anterior superior alveolar nerve
  • Aortic plexus
  • Auerbach's plexus
  • Auriculotemporal nerve
  • Axillary nerve

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The deep fibular nerve (deep peroneal nerve) begins at the bifurcation of the common peroneal nerve, between the fibula and upper part of the fibularis (peronæus) longus, passes infero-medially, deep to extensor digitorum longus, to the anterior surface of the interosseous
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Kinesiology is the scientific study of the anatomy, physiology, and mechanics of body movement, especially in humans. [1] The word kinesiology is derived the Greek "kinesis" (motion) + the suffix -ology or -logy from the greek "logos" or "logia"(meaning a field of study).
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Dorsiflexion is the movement which decreases the angle between the foot and the leg. The movement moving in opposite directions is called Plantarflexion.

The range of motion for dorsiflexion is indicated in the literature as 20° to 30°.
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Inversion is the movement of the sole towards the median plane (same as when an ankle is twisted).

Tibialis anterior and tibialis posterior invert.[1]

It occurs at the subtalar joint.[2]

References

1.

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An antagonist is a kind of muscle that acts in opposition to the movement generated by the agonist and is responsible for returning a limb to its initial position.

Antagonistic pairs in houses

These antagonistic muscles are found in pairs called antagonistic pairs.
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In human anatomy, the peroneus longus (also known as fibularis longus) is a superficial muscle in the lateral compartment of the leg, and acts to evert and plantar flex the ankle.
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muscle is a powerful superficial muscle that is in the back part of the lower leg (the calf). It runs from its 2 heads just above the knee to the heel, and is involved in standing and walking. Along with the soleus muscle it forms the calf muscle.
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In humans and some other mammals, the soleus is a powerful muscle in the back part of the lower leg (the calf). It runs from just below the knee to the heel, and is involved in standing and walking.
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Plantaris is a vestigial structure and one of the superficial muscles of the posterior crural compartment of the leg.

It is innervated by the tibial nerve (S1, S2).
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The Tibialis posterior is the most central of all the leg muscles.

It is the key stabilising muscle of the lower leg.

Origin and insertion

It originates on the inner posterior borders of the tibia and fibula.
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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MUSCLE (multiple sequence comparison by log-expectation) is public domain, multiple sequence alignment software for protein and nucleotide sequences.
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tibia is the larger of the two bones in the leg below the knee in vertebrates.

In humans

The tibia or shin bone, in human anatomy, is found medial (towards the middle) and anterior (towards the front) to the other such bone, the fibula.
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tibia is the larger of the two bones in the leg below the knee in vertebrates.

In humans

The tibia or shin bone, in human anatomy, is found medial (towards the middle) and anterior (towards the front) to the other such bone, the fibula.
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There are three cuneiform bones in the human foot:
  • the medial cuneiform
  • the intermediate cuneiform also known as the middle
  • the lateral cuneiform
They are located between the navicular bone and the first, second and third metatarsal bones and are medial to
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The metatarsus consists of the five long bones of the foot, which are numbered from the medial side (ossa metatarsalia I.-V.); each presents for examination a body and two extremities. These are analogous to the metacarpals of the hand.
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The foot is a biological structure found in many animals that is used for locomotion. In many animals with feet, the foot is a separate organ at the terminal part of the leg made up of one or more segments or bones, generally including claws or nails.
..... Click the link for more information.
Dorsiflexion is the movement which decreases the angle between the foot and the leg. The movement moving in opposite directions is called Plantarflexion.

The range of motion for dorsiflexion is indicated in the literature as 20° to 30°.
..... Click the link for more information.
The anterior tibial artery of the lower limb carries blood to the anterior compartment of the leg and dorsal surface of the foot, from the popliteal artery.

It is accompanied by a deep vein, the anterior tibial vein, along its course.
..... Click the link for more information.
The common peroneal nerve (common fibular nerve; external popliteal nerve; peroneal nerve), about one-half the size of the tibial nerve, is derived from the dorsal branches of the fourth and fifth lumbar and the first and second sacral nerves.
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