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The upper extremity of the radius (or proximal extremity) presents a head, neck, and tuberosity. The radial head has a cylindrical form, and on its upper surface is a shallow cup or fovea for articulation with the capitulum (or capitellum) of the humerus .
Beneath the neck of the radius, on the medial side, is an eminence, the radial tuberosity; its surface is divided into: . a posterior, rough portion, for the insertion of the tendon of the biceps brachii.
It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. The humeral upper extremity consists of a rounded head, a narrow neck, and two short processes (tubercles, sometimes called tuberosities). The body is cylindrical in its upper portion, and more prismatic below.
The head of the radius is wider than the bone's neck, and, because the annular ligament embraces both, the radial head is "trapped" inside the ligament which thus acts to prevent distal displacement of the radius. [4] It helps to stabilise the proximal radial head, [6] and the radioulnar joint. [7]
Common mechanism of injury: Neck of radius fracture, elbow dislocation or fracture, tight cast, rheumatoid nodules, injections due to tennis elbow, injuring the deep branch of the radial nerve that pierces the radial head, causing posterior interosseous nerve syndrome; Motor deficit: Weakness in extension of hand and loss of extension of fingers.
The mahogany neck was originally made of 15 layers of laminated mahogany but was later changed to a solid mahogany neck to lower production costs. The neck is wrapped in a skin of carbon fiber with a 10" to 15" conical section fretboard [5] radius. It has two custom DiMarzio Ultra Jazz humbucking pickups with an active Fishman EQ and a Fishman ...
Consequently, it is relatively expensive to have done. Generally, luthiers scallop fingerboards with a special milling machine that has 22 or 24 (according to neck dimensions and number of frets) wood cutting tools. This equipment saves time and adds precision to the process of scalloping the wood in the neck's radius the same in all fret spaces.
forced hyperflexion of neck "Clay shovellers fracture". Medcyclopaedia. GE. Colles' fracture: Abraham Colles: distal radius fracture with dorsal angulation, impaction and radial drift: fall on outstretched hand: Colles' fracture at Whonamedit? Duverney fracture: Joseph Guichard Duverney: isolated fracture of the iliac wing: direct trauma ...