Navicular | pacs

X-ray of the

right foot by lateral projection, with shapes representing where common accessory and sesamoid bones would be, colored by their prevalences, and with representative shapes.

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Os tibiale

externum - Klassifikation nach Geist: Von links nach rechts Typ 1 bis 3.

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FIG. 276–

The left navicular. Antero-lateral view.

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FIG. 277–

The left navicular. Postero-medial view.

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Os tibiale

externum im Röntgenbild des Fußes, hier Typ 1 nach Geist, also ein runder, vom Os naviculare isolierter Knochen.

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Os tibiale

externum im Röntgenbild des Fußes, hier Typ 2 nach Geist, also ein dreieckiger, mit dem Os naviculare in breitem Kontakt stehender Knochen.

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Dorsoplantar

X-ray of the feet of a 44 year old woman with suspected pes cavus. The right foot (to the left in the image) has an accessory navicular bone, type 2. On the left foot (to the right in the image) it is fused with the navicular bone, forming a cornuate navicular bone (white arrow), which is type 3.

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Os naviculare

cornutum im Röntgenbild: Hakenförmige Ausziehung des medialen Rands des Os naviculare wie ein verschmolzenes Os tibiale externum (siehe Geist-Klassifikation).

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Os naviculare

cornutum im Röntgenbild: Hakenförmige Ausziehung des medialen Rands des Os naviculare wie ein verschmolzenes Os tibiale externum (siehe Geist-Klassifikation).

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Talus •

Lower limb bones (illustrations) - Ganzer Fall bei Radiopaedia

College, O. Lower limb bones (illustrations). Case study, Radiopaedia.org. (accessed on 24 Oct 2022) https://doi.org/10.53347/rID-42753 • CC by-nc-sa 3.0 (modified)

Tarsal bones

• Navicular (Gray's illustration) - Ganzer Fall bei Radiopaedia

Hacking C, Navicular (Gray's illustration). Case study, Radiopaedia.org (Accessed on 23 Jan 2023) https://doi.org/10.53347/rID-83348 • CC by-nc-sa 3.0 (modified)

Radiopaedia • CC-by-nc-sa 3.0 • de

The navicular bone is found in the midfoot and is one of the tarsal bones. Its structure resembles that of a boat. It is the last bone of the foot to ossify fully .

Summary

location: lies within the medial aspect of the midfoot
relations: the talus bone, cuboid bone and the three cuneiform bones
blood supply: branches of the dorsalis pedis, posterior tibial and medial plantar arteries

Gross anatomy

Articulations

The navicular bone articulates proximally with the head of the talus bone, laterally with the cuboid bone and also distally to the lateral, intermediate and medial cuneiform bones .

Attachments

It gives attachments to the superomedial and inferior calcaneonavicular ligament which together form the spring ligament within the foot .

Musculotendinous

The posterior tibialis tendon inserts into the navicular bone medially .

Ligamentous

The dorsal cuneonavicular ligament and plantar cuneonavicular ligament are two ligaments that join each cuneiform bone to the navicular. The first/medial cuneiform bone also is joined to the navicular by the medial cuneonavicular ligament .

Blood supply

A branch of dorsalis pedis artery gives off three to five smaller branches which supply the navicular from the medial side. On the lateral aspect of the bone, small branches from the posterior tibial artery. Branches of the medial plantar artery also supply the plantar surface of the bone . In the central navicular there is a region of watershed blood supply which predisposes the bone to stress fractures.

Variant anatomy

An accessory ossicle can be present on the medial aspect of the navicular known as an accessory navicular.

Development

Abnormalities of the ossification of the navicular can be common. The navicular is the last bone in the foot to ossify. In girls, the navicular anlage ossifies between 18-24 months and in boys 30-36 months .