It should be an objective to provide devices that will allow motion in order to perform functional tasks and, ideally, occupational tasks.Ĭompensatory motion in the upper extremityĬontrary to accepted thought, the primary functions of the shoulder complex and elbow are mutually exclusive. The knowledge of functional range of motion requirements for activities of daily living can act as a guide when developing orthotic assistive devices. This converts to 40 degrees each of wrist flexion and extension and 40 degrees of combined radial–ulnar deviation (30 degrees of ulnar deviation, 10 degrees of radial deviation). The majority of the hand placement and range of motion tasks studied in this project could be accomplished with 70% of the maximal range of wrist motion ( Fig. The entire battery of evaluated tasks could be accomplished with 60 degrees of extension, 54 degrees of flexion, 40 degrees of ulnar deviation, and 17 degrees of radial deviation. The amount of wrist flexion and extension, as well as radial and ulnar deviation, were measured simultaneously using a biaxial wrist electrogoniometer. 84 examined 40 normal subjects (20 men and 20 women) to determine the range of motion required to perform activities of daily living. Similarly, the wrist has a normal arc of flexion of 80 to 85 degrees, approximately 70 degrees of extension, 20 degrees of radial deviation, and 30 degrees of ulnar deviation. In Morrey BF editor: Joint replacement arthroplasty, New York, 1991, Churchill Livingstone. 12-2 Functional arc of forearm rotation is approximately 50 degrees of pronation and 50 degrees of supination for most activities of daily living.įrom An KN, Morrey BF: Biomechanics. Figure 12-2 illustrates the importance of forearm supination and pronation in positioning the upper extremity for feeding and dressing tasks.įig. Special requirements for other activities, including occupational tasks, have not been clearly elucidated. Note that the activities studied were related to activities of daily living. Those activities that use an arc of motion require it be about equally centered between pronation and supination. Furthermore, these same activities required an equal amount of 50 degrees of pronation and 50 degrees of supination. ![]() ![]() 66 revealed that 15 activities of daily living can be carried out with an arc of motion of 30 to 130 degrees of flexion–extension ( Fig. A study of the functional elbow arc of motion conducted by Morrey et al. For example, although the elbow has a normal arc of flexion–extension of 0 to 150 degrees and pronation and supination of 75 to 85 degrees, respectively, 15 the full arc of motion is not generally used for most activities of daily living. When studying upper extremity motion, it is important to delineate between the normal arc of movement standards for specific joints and the functional arc of motion required for most daily activities. Normal range of motion arcs versus functional motion requirements
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |