Apraxia involves only voluntary motor acts; and Aphasia is evident only in symbolic motor acts.
But if someone then reqested that I place my hand on my shoulder, I might make every movement with my arm except that.
I once worked with a stroke patient who had oral apraxia. She could not imitate my movement of putting my tongue between my teeth.
She would open her jaw, or protrude her tongue, but she could not find the right movement.
Expressive Aphasia is a problem which occurs only when a person is trying to talk (i.e., using symbols).
Although they could imitate movements like putting their tongue between their teeth, they might have problems saying, "thimble."
We are at last finished with the notion of Task Analysis. There is one more process that needs to be introduced, and we will do that next in the discussion of Mysak's Model.
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