Tibialis anterior muscle

Source: Wikipedia, the free encyclopedia.
Tibialis anterior muscle
Fibularis longus, gastrocnemius, soleus, plantaris, tibialis posterior
Identifiers
Latinmusculus tibialis anterior
TA98A04.7.02.037
TA22644
FMA22532
Anatomical terms of muscle]

The tibialis anterior muscle is a

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

deep peroneal nerve
in the upper part of the leg.

Structure

The tibialis anterior muscle is the most medial muscle of the

better source needed
]

The muscle ends in a tendon which is apparent on the anteriomedial dorsal aspect of the foot close to the ankle.[citation needed] Its tendon is ensheathed in a synovial sheath. The tendon passes through the medial compartment superior and inferior extensor retinacula of the foot.[2]

Origin

The tibialis anterior muscle arises from the upper 2/3 of the lateral surface of the tibia and

better source needed] the adjoining part of the interosseous membrane and deep fascia overlying it,[2] and the intermuscular septum between this muscle and the extensor digitorum longus.[citation needed
]

Insertion

It is inserted into the medial and inferior surface of the

medial cuneiform bone, and adjacent portion of the first metatarsal bone.[2]
'

Nerve supply

The tibialis anterior muscle is innervated by the deep fibular nerve, and recurrent genicular nerve (L4).[2]

Variation

A deep portion of the muscle is rarely inserted into the

great toe.[citation needed
]

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]

Actions/movements

The muscle acts to

better source needed
]

Function

The muscle helps maintain the

better source needed
]

The movements of tibialis anterior are

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.[citation needed
]

Clinical significance

A tibialis anterior hernia is a rare type of hernia in which fat or other material protrudes through a defect in the tibialis anterior muscle.[6] It may be caused by trauma, such as an inadvertent kick to the lower leg from an opposing player in a football match.[citation needed]

Additional images

medial view of dissected ankle has two muscles

  • Lateral aspect of right leg.
    Lateral aspect of right leg.
  • Tibialis anterior muscle
    Tibialis anterior muscle
  • Cross-section through top third and second third of right leg.
    Cross-section through top third and second third of right leg.
  • Tibialis anterior muscle
    Tibialis anterior muscle
  • Ankle joint. Deep dissection. Lateral view *This has some structures labelled incorrectly e.g. tibialis anterior, extensor hallucis longus and cuboid bone
    Ankle joint. Deep dissection. Lateral view *This has some structures labelled incorrectly e.g. tibialis anterior, extensor hallucis longus and cuboid bone

See also

References

Public domain This article incorporates text in the public domain from page 480 of the 20th edition of Gray's Anatomy (1918)

  1. ^
    ISBN 978-1-4377-0927-8
    , retrieved 2021-03-01
  2. ^
    ISBN 978-0-7295-3752-0
    .
  3. ISBN 978-0-443-06644-3
    , retrieved 2021-03-01
  4. ^ "10 Incredible Tibialis Raise Benefits". 2022-04-08. Retrieved 2023-09-28.
  5. ISSN 0021-9290
    .
  6. PMID 27999130
    .

External links

Wikimedia Commons has media related to Tibialis anterior muscles.
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