At what points in the range do each of the following joint motions begin and end as the wrist moves from flexion to extension: (a) radiocarpal motion, (b) midcarpal motion, or (c) distal carpal row/scaphoid on lunate/triquetrum
What will be an ideal response?
ANS:
(a) Pure radiocarpal motion occurs after the carpals all become close-packed and move as a single unit on the radius and disc. This occurs at 45 ° of hyperextension and continues until full extension is achieved (at which point the carpals and distal radius and disc all become close-packed). (b) Pure midcarpal motion occurs during the first phase of wrist extension from full flexionâ€"that is, from full flexion to neutral position of the wrist. (c) At neutral position, the scaphoid locks on to the distal carpal row and moves with the distal carpal row on the relatively immobile lunate and triquetrum. This motion proceeds until 45 ° of hyperextension.
You might also like to view...
Fluoroscopy of lumbar arteries using high osmolar contrast
A) B4190ZZ B) B41B1ZZ C) B41F1ZZ D) B41GYZZ
An injured baseball player is complaining of pain at the site of injury, numbness, and tingling in the extremity. You see swelling and deformity, and tell the athlete that these symptoms are signs and symptoms of a fracture. Is this correct?
Fur that gently returns to the original position is called roll-back fur or ____________________ fur
Fill in the blank(s) with correct word
The primary collector of vital statistics for public policy decisions is the U.S. Government.
Answer the following statement true (T) or false (F)