Youthful memory capacity in old brains: anatomic and genetic clues from the Northwestern SuperAging Project.
Level 4 - case-series / case-control
Cross-sectional case-control and postmortem series comparing selected elderly high-performers with controls.
PubMed 23198888 · doi:10.1162/jocn_a_00300
What was done
The Northwestern SuperAging Project evaluated community-dwelling individuals over age 80 with exceptional episodic memory performance (SuperAgers). Structural MRI was used to assess cortical thickness relative to age-matched cognitively average peers and younger healthy controls aged 50 to 60 years. Additional postmortem neuroanatomical assessments examined Alzheimer-type neuropathology and von Economo neuron density in the anterior cingulate cortex, alongside genetic testing for the apolipoprotein E (APOE) ε4 allele.
What was found
The abstract reports no numerical values, effect sizes, or test statistics. Qualitatively, SuperAgers showed higher cortical thickness than age-matched peers and greater anterior cingulate cortex thickness compared to healthy 50- to 60-year-old adults. A subset of SuperAgers had low densities of age-related Alzheimer pathology and high numbers of von Economo neurons in the anterior cingulate gyrus. The frequency of the APOE ε4 allele was lower in SuperAgers than in the general population.
Why it matters
The findings suggest potential neuroanatomical and genetic correlates—such as anterior cingulate cortex preservation and low APOE ε4 carriage—associated with resistance to age-related cognitive decline.
Limits
The abstract does not state the sample size (only noting a small cohort) or provide any quantitative measurements, confidence intervals, or p-values. Postmortem analyses were available only for an unspecified subset of cases, and the cross-sectional, observational design cannot prove causal resistance to neurodegeneration.
Cited by
- supports Preservation or larger volume of the anterior mid-cingulate cortex is a defining characteristic of super-agers who maintain high cognitive and physical function into their 80s and 90s.
- supports Anterior midcingulate cortex volume is the strongest anatomical brain correlate observed in superagers.