Ritically evaluate the contribution of TWO research methods in biopsychology to the study of memory OR mental illness

I was going to write an essay on the use of brain lesions to study areas of the brain and fMRI scanning both how they help us to discover more about Memory or mental illness. But any methods used in biopsychology will be fine as long as they relate to either memory or mental illness.

DEADLINE 9PM 25TH JULY 2013