Case Study 2: Alzheimer's Disease (AD)

Case Study 2: Interpretation

Task Performance:

• Button Press Accuracy is often low, suggesting poor ability to pay attention to the

test stimuli

• Median Reaction Time is usually delayed, indicating abnormal stimulus processing

and executive function

ERP Features:

• P50 from the standard stimulus is usually normal, though patients in the early

stages of the disease can show abnormally high amplitude

• N200 amplitude is usually decreased and latency can be prolonged, suggesting

poor good information processing correlated with executive function

• P3b amplitude is also usually low and latency can be prolonged, reflecting

suboptimal working memory and classification speed respectively

• P3a amplitude from the distractor stimulus can be low, indicating poor focal

attention

EEG Features:

• PAF from the EEG test is usually low, reflecting poor overall cognitive performance