P3b

• This ERP feature is elicited when a deviant stimulus is associated with a task, and reflects

an update in working memory.

• The P3b amplitude is determined by the amount of attentional resources allocated when

working memory is updated. Its latency reflects stimulus evaluation and classification speed.

• P3b amplitude is usually smaller, and its latency can be longer in AD patients.

• Patients that have suffered a concussion usually have a decrease in P3b amplitude, with

generally normal peak latency.