Why does my arm lift up when I yawn?

Bobb says:

In 1989 I was diagnosed as having Multiple Sclerosis. Then on December 23rd after surgery that night I had a stroke.
Ever since that happened, when I have a big yawn my left arm lifts up. My left side was effected by the stroke.

Is there a reason why this happens?

What do you think?

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Why does my arm lift up when I yawn?

katieHaylor (OP)

Why does my arm lift up when I yawn?

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