Every year 5,200 women and 3,600 men receive a diagnosis of multiple sclerosis (MS) in the United States. MS is the most common nontraumatic disabling neurological disorder in 20-59 year-olds. A variety of cognitive deficits are present in 43-65 percent of cases. Information processing speed and working memory (WM) deficits are common. The relationship between slowed information processing and other impaired cognitive functions such as verbal WM remains unclear. Slowed processing might account for remaining cognitive deficits. This study aims to 1) confirm processing speed and verbal WM deficits by comparing MS patients and healthy volunteers; 2) demonstrate significant correlations between these abilities; 3) determine if verbal WM impairments can be solely attributed to slowed processing by treating processing speed as a covariate in group comparisons; and 4) demonstrate differential deficits of verbal WM components processes (e.g., rehearsal, executive control) in group comparison across these components. If processing speed accounts for verbal WM deficits, a diffuse brain process resulting in global cognitive inefficiency would be supported. Alternatively, unique verbal WM deficits that are not attributable to the effects of cognitive slowing would support the idea of more focal neural disconnections, or the differential effects of information processing speed upon verbal WM components. These outcomes would have a clear impact on our understanding of the process by which MS cognitive deficits occur and help us better predict underlying brain systems involved. This is where I hope to direct my future research with a F32 award.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
5F32NS042404-02
Application #
6555886
Study Section
Special Emphasis Panel (ZRG1-RPHB-3 (01))
Program Officer
Nunn, Michael
Project Start
2002-09-11
Project End
Budget Start
2002-09-11
Budget End
2003-09-10
Support Year
2
Fiscal Year
2002
Total Cost
$38,320
Indirect Cost
Name
Miriam Hospital
Department
Type
DUNS #
039318308
City
Providence
State
RI
Country
United States
Zip Code
02906
Sweet, Lawrence H; Vanderhill, Susan D; Jerskey, Beth A et al. (2010) Subvocal articulatory rehearsal during verbal working memory in multiple sclerosis. Neurocase 16:418-25
Sweet, Lawrence H; Paskavitz, James F; Haley, Andreana P et al. (2008) Imaging phonological similarity effects on verbal working memory. Neuropsychologia 46:1114-23