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Entorhinal cortex volume in older adults: Reliability and validity considerations for three published measurement protocols

  • C.C. PRICE (a1) (a2) (a3), M.F. WOOD (a4), C.M. LEONARD (a2) (a5), S. TOWLER (a1), J. WARD (a1), H. MONTIJO (a6), I. KELLISON (a1), D. BOWERS (a1) (a2), T. MONK (a7), J.C. NEWCOMER (a8) and I. SCHMALFUSS (a9) (a10)...
Abstract
Abstract

Measuring the entorhinal cortex (ERC) is challenging due to lateral border discrimination from the perirhinal cortex. From a sample of 39 nondemented older adults who completed volumetric image scans and verbal memory indices, we examined reliability and validity concerns for three ERC protocols with different lateral boundary guidelines (i.e., Goncharova, Dickerson, Stoub, & deToledo-Morrell, 2001; Honeycutt et al., 1998; Insausti et al., 1998). We used three novice raters to assess inter-rater reliability on a subset of scans (216 total ERCs), with the entire dataset measured by one rater with strong intra-rater reliability on each technique (234 total ERCs). We found moderate to strong inter-rater reliability for two techniques with consistent ERC lateral boundary endpoints (Goncharova, Honeycutt), with negligible to moderate reliability for the technique requiring consideration of collateral sulcal depth (Insausti). Left ERC and story memory associations were moderate and positive for two techniques designed to exclude the perirhinal cortex (Insausti, Goncharova), with the Insausti technique continuing to explain 10% of memory score variance after additionally controlling for depression symptom severity. Right ERC-story memory associations were nonexistent after excluding an outlier. Researchers are encouraged to consider challenges of rater training for ERC techniques and how lateral boundary endpoints may impact structure-function associations. (JINS, 2010, 16, 846–855.)

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Corresponding author
*Correspondence and reprint requests to: Catherine C. Price, Ph.D., Clinical and Health Psychology, 101 S. Newell Drive, PO Box 100165, University of Florida, Gainesville, FL 32610. E-mail: cep23@phhp.ufl.edu
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Journal of the International Neuropsychological Society
  • ISSN: 1355-6177
  • EISSN: 1469-7661
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