Table III.

Talairach coordinates of local maxima showing a significant difference between patients and controls both for the steady state amplitude and temporal derivative

Task	x, y, z	Z‐score	Region
Encoding task
Steady state amplitude
MCI < Controls	−12, 50, −14	4.02	Medial frontal gyrus
Temporal derivative
AD < MCI	4, 36, −6	3.90	Anterior cingulate gyrus
	−10, 42, −8	3.87	Anterior cingulate gyrus
AD < Controls	4, 36, −8	3.64	Anterior cingulate gyrus
	−10, 42, −8	3.95	Anterior cingulate gyrus
N‐BACK task: temporal derivative
Simple WM (negative derivative in controls)
AD > C (AD less negative than controls)	4, −68, 24	3.46	Precuneus
MCI > C	4, −66, 26	3.35	Precuneus
Increased WM load (positive derivative in controls)
C > AD	−22, 16, −16	3.55	Inferior frontal gyrus