I saw on Psychcentral.com that a new study from Queen's University suggests that "Parkinson’s disease can affect thought processes and the acquisition of knowledge". Welcome to my world :-) !
Other interesting tidbits from the article:
"Queen’s University researchers have found that people with Parkinson’s disease can perform automated tasks better than people without the disease, but have significant difficulty switching from easy to hard tasks."
"Even when asked to simply prepare to change their behavior, people with the disease found it incredibly difficult to adjust their plans."
All I can say is: well, DUHHHHH!!
Seriously, though, I'm glad to see some actual research going on about this.
Here's a link to the article on psychcentral