From Surf Wiki (app.surf) — the open knowledge base

Flexor hallucis brevis muscle

Muscle in sole of the foot that leads to the big toe

Field	Value
Name	Flexor hallucis brevis muscle
Latin	musculus flexor hallucis brevis
Image	Musculus flexor hallucis brevis.png
Caption	Muscles of the sole of the foot. Third layer. (Flexor hallucis brevis visible at left.)
Origin	Plantar aspect of the cuneiforms, plantar calcaneocuboid ligament, long plantar ligament
Insertion	Medial Head: Medial sesamoid bone of the metatarsophalangeal joint, proximal phalanx of great toe. Lateral head: Lateral sesamoid bone of the metatarsophalangeal joint, proximal phalanx of great toe
Action	Flex hallux
Antagonist	Extensor hallucis longus muscle
Nerve	Medial plantar nerve

Flexor hallucis brevis muscle is a muscle of the foot that flexes the big toe.

Structure

The '''flexor hallucis brevis''' is located just inferior to the foot and toe bones. As its name suggests, its contraction results in flexion of the big toe (hallux).

Flexor hallucis brevis muscle arises, by a pointed tendinous process, from the medial part of the under surface of the cuboid bone, from the contiguous portion of the third cuneiform, and from the prolongation of the tendon of the tibialis posterior muscle which is attached to that bone. It divides in front into two portions, which are inserted into the medial and lateral sides of the base of the first phalanx of the great toe, a sesamoid bone being present in each tendon at its insertion. The medial portion is blended with the abductor hallucis muscle previous to its insertion; the lateral portion (sometimes described as the first plantar interosseus) with the adductor hallucis muscle. The tendon of the flexor hallucis longus muscle lies in a groove between the two. Its tendon usually contains two sesamoid bones at the point under the first metatarsophalangeal joint.

Innervation

The medial and lateral head of the flexor hallucis brevis is innervated by the medial plantar nerve. Both heads are represented by spinal segments S1, S2.

Variation

Origin subject to considerable variation; it often receives fibers from the calcaneus or long plantar ligament. Attachment to the cuboid bone sometimes wanting. Slip to first phalanx of the second toe.

Function

Flexor hallucis brevis flexes the first metatarsophalangeal joint, or the big toe. It helps to maintain the medial longitudinal arch. It assists with the toe-off phase of gait providing increased push-off.

Clinical significance

Sesamoid bones contained within the tendon of flexor hallucis brevis muscle may become damaged during exercise.

Additional images

Image:Gray269.png|Bones of the right foot. Plantar surface. File:Slide1ABA.JPG|Flexor hallucis brevis muscle File:Slide8ABA.JPG| Flexor hallucis brevis muscle

References

Requejo, S. M.. (2017-01-01). "Chapter 76 - Common Orthopedic Foot and Ankle Dysfunctions". Elsevier.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

foot-muscles muscles-of-the-lower-limb

Want to explore this topic further?

Ask Mako anything about Flexor hallucis brevis muscle — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report