Another related article about reduced energy intake that adds some social commentary: 
<a href="http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pmc&#x2F;articles&#x2F;PMC3518570&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pmc&#x2F;articles&#x2F;PMC3518570&#x2F;</a>
&quot;Energy Intake and Exercise as Determinants of Brain Health and Vulnerability to Injury and Disease&quot;