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Brain Imaging and Behavior

, Volume 10, Issue 2, pp 517–523 | Cite as

Is the Alzheimer’s disease cortical thickness signature a biological marker for memory?

  • Edgar Busovaca
  • Molly E. Zimmerman
  • Irene B. Meier
  • Erica Y. Griffith
  • Stuart M. Grieve
  • Mayuresh S. Korgaonkar
  • Leanne M. Williams
  • Adam M. Brickman
Original Research

Abstract

Recent work suggests that analysis of the cortical thickness in key brain regions can be used to identify individuals at greatest risk for development of Alzheimer’s disease (AD). It is unclear to what extent this “signature” is a biological marker of normal memory function – the primary cognitive domain affected by AD. We examined the relationship between the AD signature biomarker and memory functioning in a group of neurologically healthy young and older adults. Cortical thickness measurements and neuropsychological evaluations were obtained in 110 adults (age range 21–78, mean = 46) drawn from the Brain Resource International Database. The cohort was divided into young adult (n = 64, age 21–50) and older adult (n = 46, age 51–78) groups. Cortical thickness analysis was performed with FreeSurfer, and the average cortical thickness extracted from the eight regions that comprise the AD signature. Mean AD-signature cortical thickness was positively associated with performance on the delayed free recall trial of a list learning task and this relationship did not differ between younger and older adults. Mean AD-signature cortical thickness was not associated with performance on a test of psychomotor speed, as a control task, in either group. The results suggest that the AD signature cortical thickness is a marker for memory functioning across the adult lifespan.

Keywords

Alzheimer’s Disease Cortical thickness Structural MRI Neuropsychology Memory 

Notes

Acknowledgments

We acknowledge the data and support provided by BRAINnet; www.BRAINnet.net, under the governance of the BRAINnet Foundation. BRAINnet is the scientific network that coordinates access to the Brain Resource International Database for independent scientific purposes. We also thank the individuals who gave their time to participate in the database. This research was approved by local ethics committees. SMG acknowledges the Sydney Medical School Foundation for support.

Disclosures

Dr. Grieve previously received consulting fees from Brain Resource Ltd.

Dr. Williams previously received consulting fees and stock options from Brain Resource Ltd.

Mr. Busovaca, Dr. Zimmerman, Ms. Meier, Ms. Griffith, and Dr. Korgaonkar declare that they do not have financial and personal relationships that might bias this work.

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, and the applicable revisions at the time of the investigation. Informed consent was obtained from all patients for being included in the study.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Edgar Busovaca
    • 1
  • Molly E. Zimmerman
    • 2
    • 3
  • Irene B. Meier
    • 1
  • Erica Y. Griffith
    • 1
  • Stuart M. Grieve
    • 4
    • 5
    • 6
  • Mayuresh S. Korgaonkar
    • 4
    • 5
    • 6
  • Leanne M. Williams
    • 7
    • 8
  • Adam M. Brickman
    • 1
  1. 1.Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, Department of Neurology, College of Physicians and SurgeonsColumbia UniversityNew YorkUSA
  2. 2.Department of PsychologyFordham UniversityBronxUSA
  3. 3.Department of NeurologyAlbert Einstein College of MedicineBronxUSA
  4. 4.Sydney Translational Imaging Laboratory, Sydney Medical SchoolUniversity of SydneySydneyAustralia
  5. 5.Brain Dynamics CentreWestmead Millennium InstituteWestmeadAustralia
  6. 6.Sydney Medical SchoolWestmeadAustralia
  7. 7.Department of Psychiatry and Behavioral SciencesStanford UniversityStanfordUSA
  8. 8.Sierra-Pacific Mental Illness Research, EducationClinical Center (MIRECC) Veterans Affairs Palo Alto Health Care SystemPalo AltoUSA

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