Reduced brain N-acetyl-aspartate in frontal lobes suggests neuronal loss in patients with amyotrophic lateral sclerosis.

Abstract:

:We performed proton magnetic resonance spectroscopy (1H-MRS) in three patients with amyotrophic lateral sclerosis (ALS) to evaluate the distribution and extent of cortical neuronal damage as demonstrated by decreased N-acetyl-aspartate (NAA) levels. We examined primary motor (precentral gyrus) and parietal neocortical (superior parietal gyrus) regions. ALS was defined with lower and upper motor neuron signs. Compared with matched healthy controls, ALS patients had a significant decrease in NAA levels in the primary motor cortex (p < 0.001) compared with parietal regions and homologous regions in healthy controls. Two clinical applications can be extracted: first, the upper motor neuron signs present in the ALS, come from a neuronal loss within the primary motor cortex and may explain the frontal syndrome associated with ALS. Second clinical applications of 1H-MRS could include identification of extent of upper motor neuron involvement, aiding diagnosis of syndromes presenting with an ALS-like syndrome.

journal_name

Neurol Res

journal_title

Neurological research

authors

Giroud M,Walker P,Bernard D,Lemesle M,Martin D,Baudouin N,Brunotte F,Dumas R

doi

10.1080/01616412.1996.11740412

subject

Has Abstract

pub_date

1996-06-01 00:00:00

pages

241-3

issue

3

eissn

0161-6412

issn

1743-1328

journal_volume

18

pub_type

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