Motor cortex excitability in Alzheimer's disease: a transcranial magnetic stimulation follow-up study.

Abstract:

:Transient cognitive and behavioral stabilization of patients with Alzheimer's disease (AD) is the main goal of acetylcholinesterase inhibitor (AChEI) therapy. Response to treatment is variable and it is usually assessed clinically via neuropsychological scales. Functional neuroimaging could ideally permit the objective evaluation of the topographic correlates of therapy on brain functioning, but is expensive and little available on a large scale. On the other hand, neurophysiological methods such as transcranial magnetic stimulation (TMS) could offer an alternative, low-cost and risk free tool of assessing response to treatment in AD. Previous TMS studies have demonstrated hyperexcitability and asymptomatic motor cortex reorganization in the early stages of AD in patients with normal motor function. The aim of this study was to compare motor cortex functionality in 10 AD patients before and after long-term AchEIs therapy in order to monitor potential drug-related changes in cortical excitability and organization. Examined parameters of motor cortex physiology were found to be unchanged in patients with stabilized cognitive performance during the therapy. TMS, along with clinical, neuropsychological, and neuroimaging data, could be an inexpensive measure of biological progression in AD and it might supplement traditional methods to assess the effects of therapy.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Ferreri F,Pasqualetti P,Määttä S,Ponzo D,Guerra A,Bressi F,Chiovenda P,Del Duca M,Giambattistelli F,Ursini F,Tombini M,Vernieri F,Rossini PM

doi

10.1016/j.neulet.2011.01.064

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

94-8

issue

2

eissn

0304-3940

issn

1872-7972

pii

S0304-3940(11)00110-8

journal_volume

492

pub_type

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