Scaphoid: Difference between revisions
Nina Myburg (talk | contribs) (Created page with "{{subst:Bones}}") |
Nina Myburg (talk | contribs) (Content changes) |
||
| Line 5: | Line 5: | ||
</div> | </div> | ||
== Description == | == Description == | ||
The navicular bone is the largest bone of the proximal row, and has received its name from its fancied resemblance to a boat. It is situated at the radial side of the carpus, its long axis being from above downward, lateralward, and forward. The '''superior surface''' is convex, smooth, of triangular shape, and articulateswith the lower end of the radius. The '''inferior surface,''' directed downward, lateralward, and backward, is also smooth, convex, and triangular, and is divided by a slight ridge into two parts, the lateral articulating with the greater multangular, the medial with the lesser multangular. On the '''dorsal surface''' is a narrow, rough groove, which runs the entire length of the bone, and serves for the attachment of ligaments. The '''volar surface''' is concave above, and elevated at its lower and lateral part into a rounded projection, the '''tubercle,''' which is directed forward and gives attachment to the transverse carpal ligament and sometimes origin to a few fibers of the Abductor pollicis brevis. The '''lateral surface''' is rough and narrow, and gives attachment to the radial collateral ligament of the wrist. The '''medial surface''' presents two articular facets; of these, the superior or smaller is flattened of semilunar form, and articulates with the lunate bone; the inferior or larger is concave, forming with the lunate a concavity for the head of the capitate bone. | |||
The navicular articulates with ''five'' bones: the radius proximally, greater and lesser multangulars distally, and capitate and lunate medially. | |||
<ref>Gray H. ''[https://www.bartleby.com/107/54.html Anatomy of the Human Body].'' Twentieth edition. Philadelphia: Lea & Febiger; 1918 Available from: https://www.bartleby.com/107/54.html [Accessed 19 June 2019]</ref><ref>Moore KL, Dalley AF. ''Clinically Oriented Anatomy.'' Fifth edition. Philadelphia: Lippincot Williams & Wilkins; 2006</ref> | |||
== Structure == | |||
== Function == | == Function == | ||
== Articulations == | |||
== Muscle attachments == | |||
== Clinical relevance == | == Clinical relevance == | ||
== | == See also == | ||
= References = | = References = | ||
| Line 26: | Line 27: | ||
<references /> | <references /> | ||
[[Category:Anatomy]] [[Category:Bones]] | [[Category:Anatomy]] | ||
[[Category:Bones]] | |||
[[Category:Wrist]] | |||
[[Category:Wrist Bones]] | |||
[[Category:Anatomy Project]] | |||
[[Category:Hand and Wrist Anatomy]] | |||
Revision as of 11:14, 19 June 2019
Original Editor
Top Contributors - Nina Myburg, Kim Jackson, Chrysolite Jyothi Kommu, Nikhil Benhur Abburi and Vidya Acharya
Description[edit | edit source]
The navicular bone is the largest bone of the proximal row, and has received its name from its fancied resemblance to a boat. It is situated at the radial side of the carpus, its long axis being from above downward, lateralward, and forward. The superior surface is convex, smooth, of triangular shape, and articulateswith the lower end of the radius. The inferior surface, directed downward, lateralward, and backward, is also smooth, convex, and triangular, and is divided by a slight ridge into two parts, the lateral articulating with the greater multangular, the medial with the lesser multangular. On the dorsal surface is a narrow, rough groove, which runs the entire length of the bone, and serves for the attachment of ligaments. The volar surface is concave above, and elevated at its lower and lateral part into a rounded projection, the tubercle, which is directed forward and gives attachment to the transverse carpal ligament and sometimes origin to a few fibers of the Abductor pollicis brevis. The lateral surface is rough and narrow, and gives attachment to the radial collateral ligament of the wrist. The medial surface presents two articular facets; of these, the superior or smaller is flattened of semilunar form, and articulates with the lunate bone; the inferior or larger is concave, forming with the lunate a concavity for the head of the capitate bone.
The navicular articulates with five bones: the radius proximally, greater and lesser multangulars distally, and capitate and lunate medially.
Structure[edit | edit source]
Function[edit | edit source]
Articulations[edit | edit source]
Muscle attachments[edit | edit source]
Clinical relevance[edit | edit source]
See also[edit | edit source]
References[edit | edit source]
- ↑ Gray H. Anatomy of the Human Body. Twentieth edition. Philadelphia: Lea & Febiger; 1918 Available from: https://www.bartleby.com/107/54.html [Accessed 19 June 2019]
- ↑ Moore KL, Dalley AF. Clinically Oriented Anatomy. Fifth edition. Philadelphia: Lippincot Williams & Wilkins; 2006
