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Encyclopedia > Scaphoid bone
Bone: Latin = os scaphoideum, os naviculare manus
BONES OF HAND
Proximal: A=Scaphoid, B=Lunate, C=Triquetral, D=Pisiform
Distal: E=Trapezium, F=Trapezoid, G=Capitate, H=Hamate
Scaphoid bone
Gray's subject #54 221
Articulations articulates with five bones
radius proximally
trapezoid bone and trapezium bone distally
capitate and lunate medially
MeSH Scaphoid+Bone
Dorlands/Elsevier o_07/12598675

The scaphoid bone (hand navicular) of the wrist is found on the thumb side of the hand, within the anatomical snuffbox. It is known as the "navicular" in older texts, from its fancied resemblance to a boat. In modern usage, when used without modifiers, navicular refers to a bone in the tarsus. Image File history File links Carpus. ... The lunate bone (os lunatum; semilunar bone) is a bone in the human hand that may be distinguished by its deep concavity and crescentic outline. ... The triquetral bone (also called triquetral, os triquetrum, cuneiform bone, pyramidal bone, cubital bone, os pyramidale, os triangulare, three-cornered bone, and triangular bone) is a type of carpal bone. ... The left pisiform bone. ... The trapezium is a bone in the human hand. ... In human anatomy, the trapezoid bone (lesser multangular bone; os multangulum minus) is a bone in the hands. ... The capitate bone (os capitatum; os magnum) is a bone in the human hand. ... The hamate bone (os hamatum; unciform bone) is a bone in the human hand that may be readily distinguished by its wedge-shaped form, and the hook-like process which projects from its volar surface. ... Image File history File links No higher resolution available. ... The radius is the bone of the forearm that extends from the outside of your limb to your phlangx (lateral) of the elbow to the thumb side of the wrist. ... In human anatomy, the trapezoid bone (lesser multangular bone; os multangulum minus) is a bone in the hands. ... The trapezium is a bone in the human hand. ... The left capitate bone Os capitatum of the left hand, palmar surface Os capitatum of the left hand, dorsal surface The capitate bone (os capitatum; os magnum) is a bone in the human hand. ... Lunate is a term meaning crescent or moon-shaped. ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... Elseviers logo. ... In human anatomy, the wrist is the flexible and narrower connection between the forearm and the palm. ... For other uses, see Thumb (disambiguation). ... The anatomical snuff box is a depression on the back of the hand, just beneath the thumb, that is formed by two tendons. ... The navicular bone (also called the navicular or scaphoid) is one of the tarsal bones, found in the foot. ... FIG. 268– Bones of the right foot. ...


It is approximately the size and shape of a cashew. Binomial name L. The Cashew (Anacardium occidentale; syn. ...


The scaphoid is the largest bone of the proximal row. It is situated at the radial side of the carpus, its long axis being from above downward, lateralward, and forward. This article is about Carpal bones. ...


The etymology derives from the Greek skaphe which means "a boat," and the Greek eidos which means "form".

Contents

Surfaces

The superior surface is convex, smooth, of triangular shape, and articulates with 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 Abductor pollicis brevis muscle is a muscle of the human body. ...


The lateral surface is rough and narrow, and gives attachment to the radial collateral ligament of the wrist. Radial collateral ligament can refer to: Radial collateral ligament (elbow) Radial collateral ligament (thumb) Category: ...


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 lunate bone (os lunatum; semilunar bone) is a bone in the human hand that may be distinguished by its deep concavity and crescentic outline. ... The left capitate bone Os capitatum of the left hand, palmar surface Os capitatum of the left hand, dorsal surface The capitate bone (os capitatum; os magnum) is a bone in the human hand. ...


The distal convex surface articulates with trapezium and trapezoid.


Clinical significance

It can be slow to heal because of the limited circulation to the bone. Fortunately, it is relatively difficult to break, but is the most commonly fractured bone in the carpus, particularly because of its unique anatomy and position within the wrist. Approximately 60% of carpal fractures are scaphoid fractures. This article is about the skeletal organs. ... A fractured bone in a living person is typically treated by restoring the fractured pieces of bone to their natural positions (if necessary), and maintaining those positions while the bone heals. ... A Scaphoid fracture (a fracture of the scaphoid bone) is the most common type of wrist fracture. ...


Fractures of the scaphoid must be recognized and treated quickly, as prompt treatment is the key to proper healing. Delays may complicate healing. Even rapidly immobilized fractures may require surgical treatment, including use of the Herbert screw to bind the two halves together. Timothy Herbert is an orthopaedic surgeon best known for his work with the scaphoid bone and related invention, the Herbert screw. ...


Palpation

Other than the obvious anatomical snuff box position, the scaphoid can be palpated in the volar (palmar) hand/wrist. Its position is the intersections of the long axes of the four fingers while in a fist, or the base of the thenar eminence. When felt in this position, the bone will feel to slide forward during radial deviation (wrist abduction), and flexion. The anatomical snuffbox, or radial fossa, (in Latin Foveola Radialis), is a triangular deepening on the radial, dorsal aspect of the hand - at the level of the carpal bones, specifically, the scaphoid and trapezium bones forming the floor. ...


Clicking of the scaphoid, or no anterior translation can indicate scapholunate instability.


See also

This article is about the skeletal organs. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ...

Additional images

External links


  Results from FactBites:
 
Scaphoid Nonunion - Wheeless' Textbook of Orthopaedics (995 words)
Treatment of scaphoid nonunion by radical curettage, trapezoidal iliac crest bone graft, and internal fixation with a Herbert screw.
Resection of the distal pole of the scaphoid for scaphoid nonunion with radioscaphoid and intercarpal arthritis.
Bone grafting the scaphoid nonunion: a systematic review of 147 publications including 5,246 cases of scaphoid nonunion.
UW Health (904 words)
The eight carpal bones form two rows of four bones that rest between the bones of the hand (the metacarpals) and the bones of the forearm (the radius and the ulna).
The scaphoid bone lies between the base of the thumb and the radius in a depressed area known as the “anatomical snuff box.” This point can be found by looking at the thumb side of the hand and then moving the thumb away from the rest of the fingers.
This causes the wrist to be forcefully extended, “pinching” the scaphoid, causing it to fracture.
  More results at FactBites »

 
 

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