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Neurological Sciences

, Volume 34, Issue 7, pp 1215–1221 | Cite as

Microstructural changes in the hippocampus and posterior cingulate in mild cognitive impairment and Alzheimer’s disease: a diffusion tensor imaging study

  • Yun Jeong Hong
  • Bora Yoon
  • Sung-Chul Lim
  • Yong S. Shim
  • Jee-Young Kim
  • Kook Jin Ahn
  • Il-Woo Han
  • Dong Won Yang
Original Article

Abstract

Diffusion tensor imaging (DTI) is a sensitive MRI technique in the detection of white matter degeneration. We sought to demonstrate microstructural changes in normal controls, patients with amnestic mild cognitive impairment (aMCI) and Alzheimer’s disease (AD) and to determine which DTI parameters could be a reliable tool for the early diagnosis of AD. In total, 90 participants (35 normal, 20 aMCI, 35 AD) were recruited. We included early AD patients with clinical dementia rating scores of 0.5 and 1. The fractional anisotropy and mean diffusivity values, DTI parameter, were measured with the regions of interest method in the bilateral hippocampal body and posterior cingulate. Clinical history, neurological examination, and neuropsychological assessments were conducted. The DTI parameters in the bilateral hippocampus and posterior cingulate in aMCI and AD were different from those in normal controls. No difference was found in DTI parameters of the posterior cingulate between aMCI and AD. However, hippocampal DTI parameters were different between aMCI and AD. Cognitive summary measures were significantly correlated with DTI parameters, especially FA values in the hippocampus. The DTI analysis technique demonstrated significant microstructural alterations in the hippocampus and posterior cingulate already in prodromal stage of AD. DTI parameters in the hippocampus may be a more sensitive method to determine microstructural changes in early AD states and more correlated with cognition than DTI parameters in the posterior cingulate.

Keywords

Diffusion tensor imaging Mild cognitive impairment Alzheimer’s disease Hippocampus Posterior cingulate 

Notes

Acknowledgments

This study was supported by a grant of the Korea Healthcare technology R&D Project, Ministry of Health and Welfare, Republic of Korea (A102065) and financial aid from the Catholic Medical Center Research Foundation, made in the program year 2010.

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Copyright information

© Springer-Verlag Italia 2012

Authors and Affiliations

  • Yun Jeong Hong
    • 1
  • Bora Yoon
    • 2
  • Sung-Chul Lim
    • 3
  • Yong S. Shim
    • 3
  • Jee-Young Kim
    • 4
  • Kook Jin Ahn
    • 4
  • Il-Woo Han
    • 1
  • Dong Won Yang
    • 3
  1. 1.Department of NeurologyYong-in Hyoja Geriatric HospitalYonginKorea
  2. 2.Department of NeurologyKonyang University College of MedicineDaejeonKorea
  3. 3.Department of Neurology, College of MedicineThe Catholic University of KoreaSeoulKorea
  4. 4.Department of RadiologyCatholic University of KoreaSeoulKorea

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