I wonder too, if it has something to do with limited blood flow to the hand/arm??

Restricted blood flow could mean less nutrients in and less flow of the bad stuff out of the area.

and /Or

Maybe the "troubles magnet" part has to do with loss of Proprioception??

[Proprioception (pronounced /ˌproʊpri.ɵˈsɛpʃən/ PRO-pree-o-SEP-shən, from Latin proprius, meaning "one's own" and perception) is the sense of the relative position of neighbouring parts of the body. Unlike the six exteroceptive senses (sight, taste, smell, touch, hearing, and balance) by which we perceive the outside world, and interoceptive senses, by which we perceive the pain and movement of internal organs, proprioception is a third distinct sensory modality that provides feedback solely on the status of the body internally. It is the sense that indicates whether the body is moving with required effort, as well as where the various parts of the body are located in relation to each other.]

http://en.wikipedia.org/wiki/Proprioception

In short - loss of awareness or sense of where body part is.
setts you up for accidents- I would think.

this is interesting too-
http://www.sensory-processing-disord...sfunction.html