“…Second, the PE is reflected in prefrontal engagement, particularly in the vmPFC/ventral ACC ( Brassen et al, 2011 ; Mather, 2016 ), which in turn is functionally altered in response to negative information in patients with LLD ( Brassen et al, 2008 ; Brassen et al, 2012 ; Aizenstein et al, 2011 ). Third, the structure of the vmPFC is relatively well preserved in healthy aging ( Fjell et al, 2009 ; Mather, 2016 ), whereas it is one of the key regions that exhibits structural and functional disruption in LLD ( Naismith et al, 2012 ; Zhukovsky et al, 2021 ). Fourth, higher-order cognitive functions appear to be involved, at least in part, in the development of a PE ( Fischer et al, 2010 ; Mather and Knight, 2005 ; Murty et al, 2009 ; Ritchey et al, 2011 ; Roalf et al, 2011 ; Sasse et al, 2014 ) and are needed for flexibly dealing with new challenges ( Friedman and Robbins, 2022 ).…”