These authors contributed equally to this work.
Performance on Paced Auditory Serial Addition Test and cerebral blood flow in multiple sclerosis
Article first published online: 1 APR 2013
© 2013 John Wiley & Sons A/S
Acta Neurologica Scandinavica
Volume 128, Issue 5, pages e26–e29, November 2013
How to Cite
Performance on Paced Auditory Serial Addition Test and cerebral blood flow in multiple sclerosis. Acta Neurol Scand 2013: 128: e26–e29. © 2013 John Wiley & Sons A/S., , , , , , , .
- Issue published online: 7 OCT 2013
- Article first published online: 1 APR 2013
- Manuscript Accepted: 5 MAR 2013
- Research Foundation – Flanders (FWO). Grant Number: 11C4612N
- cerebral blood flow;
- multiple sclerosis;
- magnetic resonance spectroscopy;
- Paced Auditory Serial Addition Test
To assess the relationship between performance on the Paced Auditory Serial Addition Test (PASAT) and both cerebral blood flow (CBF) and axonal metabolic integrity in normal appearing white matter (NAWM) of the centrum semiovale in patients with multiple sclerosis (MS).
Normal appearing white matter of the centrum semiovale was investigated with magnetic resonance (MR) imaging in 28 non-depressed individuals (18 patients with MS and 10 healthy controls). CBF was assessed with pseudo-continuous arterial spin labeling. N-acetylacetate/creatine (NAA/Cr) ratios (a metabolic axonal marker) were measured using 1H-MR spectroscopy. CBF was also measured in frontoparietal cortices and cerebellar hemispheres.
In subjects with MS, we found a positive correlation between performance on the PASAT and CBF to the left centrum semiovale (P = 0.008), but not with the NAA/Cr ratio. There were no correlations between PASAT scores and CBF to the right centrum semiovale, frontoparietal cortices, and cerebellar hemispheres. There was no correlation between PASAT scores and NAA/Cr ratios.
Our preliminary results suggest that performance on the PASAT in subjects with MS correlates with CBF to the left centrum semiovale, which contains left frontoparietal white matter association tracts involved in information processing speed and working memory.