This is a K23 Mentored Patient Oriented Career Development Award Application. The primary goal of the proposed research is to examine medial temporal lobe (MTL) structure and function in healthy subjects and in older individuals with varying degrees of memory difficulty - from the normal elderly to patients with mild Alzheimer's disease (AD). Four projects are proposed. One project will involve diffusion tensor imaging (DTI) measurements of anisotropy in MTL fiber tracks, which will be evaluated in young, healthy subjects (NC), elderly controls (EC), subjects with mild cognitive impairment (MCI) and patients with mild AD in order to evaluate the structural features that are specific to each group. Three interrelated event-related fMRI projects are proposed that are designed to differentially activate entorhinal, perirhinal and para-hippocampal cortices. Paradigms will be developed in young, healthy subjects and applied to each of the groups of older individuals. The candidate for this Career Development Award has experience in functional imaging of MTL function in young, healthy subjects, but wishes to gain expertise in the use of this and other emerging technologies in magnetic resonance imaging for the evaluation of clinical populations. As part of this proposal, the candidate will receive training in: 1) the clinical design and analysis of ethically sound studies focusing on comparisons between normal elderly, MCI and AD patients, 2) AD neuroanatomy, pathophysiology, neuropsychiatry and potential therapeutic strategies, 3) statistical approaches to the study of clinical populations and time course data sets, and 4) the acquisition and processing of measures of brain anisotropy using DTI.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Mentored Patient-Oriented Research Career Development Award (K23)
Project #
7K23NS050305-02
Application #
7076472
Study Section
NST-2 Subcommittee (NST)
Program Officer
Babcock, Debra J
Project Start
2004-12-15
Project End
2009-11-30
Budget Start
2004-12-16
Budget End
2005-11-30
Support Year
2
Fiscal Year
2005
Total Cost
$175,558
Indirect Cost
Name
University of California San Diego
Department
Radiation-Diagnostic/Oncology
Type
Schools of Medicine
DUNS #
804355790
City
La Jolla
State
CA
Country
United States
Zip Code
92093
Hales, J B; Brewer, J B (2013) Parietal and frontal contributions to episodic encoding of location. Behav Brain Res 243:16-20
Hales, Jena B; Brewer, James B (2012) The path to memory is guided by strategy: distinct networks are engaged in associative encoding under visual and verbal strategy and influence memory performance in healthy and impaired individuals. J Cogn Neurosci 24:1398-410
Seibert, Tyler M; Hagler Jr, Donald J; Brewer, James B (2011) Early parietal response in episodic retrieval revealed with MEG. Hum Brain Mapp 32:171-81
Hales, J B; Brewer, J B (2011) The timing of associative memory formation: frontal lobe and anterior medial temporal lobe activity at associative binding predicts memory. J Neurophysiol 105:1454-63
Gimbel, Sarah I; Brewer, James B (2011) Reaction time, memory strength, and fMRI activity during memory retrieval: Hippocampus and default network are differentially responsive during recollection and familiarity judgments. Cogn Neurosci 2:19-23
Israel, Sarah L; Seibert, Tyler M; Black, Michelle L et al. (2010) Going their separate ways: dissociation of hippocampal and dorsolateral prefrontal activation during episodic retrieval and post-retrieval processing. J Cogn Neurosci 22:513-25
Murphy, E A; Holland, D; Donohue, M et al. (2010) Six-month atrophy in MTL structures is associated with subsequent memory decline in elderly controls. Neuroimage 53:1310-7
Hales, J B; Brewer, J B (2010) Activity in the hippocampus and neocortical working memory regions predicts successful associative memory for temporally discontiguous events. Neuropsychologia 48:3351-9
Kovacevic, Sanja; Rafii, Michael S; Brewer, James B et al. (2009) High-throughput, fully automated volumetry for prediction of MMSE and CDR decline in mild cognitive impairment. Alzheimer Dis Assoc Disord 23:139-45
Hales, Jena B; Israel, Sarah L; Swann, Nicole C et al. (2009) Dissociation of frontal and medial temporal lobe activity in maintenance and binding of sequentially presented paired associates. J Cogn Neurosci 21:1244-54

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