Journal
NEUROSCIENCE LETTERS
Volume 333, Issue 1, Pages 17-20Publisher
ELSEVIER SCI IRELAND LTD
DOI: 10.1016/S0304-3940(02)00966-7
Keywords
essential tremor; magnetic resonance spectroscopic imaging; N-acetyl-L-aspartate; metabolism; neurodegenerative; pathology
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The pathological basis for essential tremor (ET) is unknown. We used proton magnetic resonance spectroscopic imaging (H-1 MRSI) in 16 ET patients and 11 controls to measure levels of intracellular metabolites, including N-acetyl-L-aspartate (NAA) and total choline, relative to total creatine (tCR), in several brain regions (cerebellum, thalamus, basal ganglia). Multislice H-1 MRSI data were acquired on a 1.5 T GE Signa Scanner by prescribing four 15-mm axial-oblique slices. The mean (standard deviation) cerebellar cortical NAA/tCR was reduced in cases compared to controls (1.53 [0.36] versus 1.91 [0.49], P = 0.03). There was an inverse association between cerebellar cortical NAA/tCR and dominant arm tremor severity (r = -0.59, P = 0.02). The reduction in cerebellar cortical NAA/tCR indicates that there is neuronal damage or loss in ET, suggesting that ET may be a neurodegenerative disease. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.
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