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Jun 17, 2009
15,036
0
Portland, OR
The following is an attempt to clarify a few words. The hope being that the use of precise terms will be better received in discussions and not thought of as only belonging to technical posts.


With respect to the arm, the words "pronation" and "supination" describe the particular rotational movement of the forearm (not the upper arm [humerus], but the forearm).

images



With respect to the arm, the words "external rotation" and "internal rotation" describe the rotation of the upper arm (humerus) within the shoulder socket.

Internal Rotation ....

DUMBBELL-INTERNAL-ROTAT%C4%B0ON.jpg



External Rotation ....

SideArmThrow_ER2.gif
 
Jun 17, 2009
15,036
0
Portland, OR
Noticed that Wellphyt & Mr T used the word 'ADduction' earlier in this thread ....

With respect to the arms, the word 'adduct' describes drawing the limb towards the body (i.e., towards the midline), while the word 'abduct' describes moving the limb away from the body (i.e., away from the midline).

abductionadduction.gif
 
Oct 13, 2010
666
0
Georgia
Thanks for the definitions FFS, maybe they could be used for a "sticky" thread? Then we could have a rule, No use of terms not found in the sticky thread (unless they are added). Everybody's happy!! :)
 
Jun 17, 2009
15,036
0
Portland, OR
LOL ... love it FPMark. In all seriousness, the better detailed our descriptions, the more we'll all help each other out. Your suggestion of a short list of body movements, along with a descriptive photo, may be helpful. Probably shouldn't restrict term usage though ... as we want to encourage as much independent thought sharing as possible.
 

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