Which of the following was an observed behavioural result from the study that indicated reduced motor skill acquisition capabilities in Parkinson's disease patients? Question 10 options: Healthy subjects showed a significant increase in mean acceleration of the thumb upon repeated training sessions on Day 1, but there was a significant decrease in mean acceleration observed for the Parkinson's patients Healthy subjects showed a significant increase in mean acceleration of the thumb upon repeated training sessions on Day 1, but there was no significant change in mean acceleration observed for the Parkinson's patients There was a significant difference in mean acceleration of the thumb contractions between the Healthy and Parkinson's groups at baseline Parkinson's Patients showed significantly lower percent change in 11C-raclopride binding potential (RAC-BP) within the right putamen compared to the healthy