On physical examination, his skin was intact, but he had swelling, ecchymosis, and tenderness to palpation ulnarly
at the thumb MCP joint.
Sharply deviate the wrist ulnarly
. Pain along the first dorsal compartment is a positive test.
The sheath of FCR is dissected through and the FCR tendon retracted ulnarly
. The dorsal sheath is then incised to reveal the pronator quadratus muscle, which is then reflected off the radius to reveal the underlying bone.
Approximately 10 cm proximal to the wrist crease, the dorsal sensory branch separates, leaving a sensory component radially and the motor component ulnarly
. The deep motor branch can be found distally and traced proximally to find the confluence of the dorsal sensory branch.
When the ulnar styloid was fractured below its base, the distal ulna was approached either dorsally between the fifth (extensor digiti quinti) and sixth (extensor carpi ulnaris) extensor compartments, where access could be gained to the ulnar styloid and triangular fibrocartilage complex, or ulnarly
between the extensor carpi ulnaris and flexor carpi ulnaris tendons.
These results agree with those of Hedge and Powers (1995), who found that participants ulnarly
deviated their left wrists 2[degrees] more than their right wrists when they typed on conventional and chair-mounted keyboards.
The proximal V links the distal radius and ulna to the proximal carpal row and is made up of the long radiolunate ligament radially and the short radiolunate and ulnolunate ulnarly
. A ligamentous link exists between the distal carpal row to the proximal carpal row and distal radius and ulna forming the distal V.
On average the participants tended to place their left wrists in a mean position that was approximately 5[degrees] more ulnarly
deviated than the position of their right wrists (15.9[degrees] and 1 0.5[degrees] of ulnar deviation for their left and right wrists, respectively).
An incision is made extending over the thumb metacarpal along the radial insertion of the thenar muscles, curving proximally and ulnarly
along the distal wrist crease to the FCR tendon.
As described by Cailliet (1982), during radial deviation, the capitate glides ulnarly
and toward the proximal row, creating a "packing" effect of the carpal bones.
Nakamura and colleagues (2) point out that the UCL, which is a thickened joint capsule ulnarly
, did not have strong attachments to the ulnar styloid, while the ECU subsheath had a firm connection to the ulnar fovea.
Maximum velocity when flexing the wrist, F(1, 17) = 4.55, p = .0478 (lab 45 [degrees] /s, supermarket 63 [degrees] /s), average velocity when flexing and extending the wrist, F(1, 17) = 4.97, p = .0396 (lab 21 [degrees] /s, supermarket 29 [degrees] /s), and average velocity when radially and ulnarly
deviating the wrist, F(1,17) = 6.56, p = .0202 (lab 21 [degrees] /s, supermarket 32 [degrees] /s), were greater for supermarket participants than for laboratory participants.