“…Aging is also associated with a variety of cognitive deficits with executive control and memory processes subserved by prefrontal and medial temporal lobe regions particularly affected (see Balota, Dolan, & Duchek, 2000; Hasher & Zacks, 1988, for reviews). Several factors have emerged that may moderate structural and functional declines in old age, including exercise (e.g., Bugg & Head, in press; Colcombe et al, 2005), physiological factors (e.g., Erickson et al, 2008; MacLullich et al, 2005), and mental health (e.g. Gunning-Dixon et al, 2008; Yehuda et al, 2007).…”