Pathophysiological associations of transcallosal dysfunction in ALS.

European Journal of Neurology : the Official Journal of the European Federation of Neurological Societies
Mehdi A J Van den BosSteve Vucic

Abstract

Involvement of the corpus callosum has been identified as a feature of amyotrophic lateral sclerosis (ALS), particularly through neuropathological studies. The aim of the present study was to determine whether alteration in transcallosal function contributed to the development of ALS, disease progression and thereby functional disability. Transcallosal function and motor cortex excitability were assessed in 17 ALS patients with results compared to healthy controls. Transcallosal inhibition (interstimulus intervals (ISI) of 8-40 ms), short interval intracortical facilitation (SICF) and inhibition (SICI) were assessed in both cerebral hemispheres. Patients were staged utilising clinical and neurophysiological staging assessments. In ALS, there was prominent reduction of transcallosal inhibition (TI) when recorded from the primary and secondary motor cortices compared to controls (F = 23.255, p < 0.001). This reduction of TI was accompanied by features indicative of cortical hyperexcitability, including reduction of SICI and increase in SICF. There was a significant correlation between the reduction in TI and the rate of disease progression (R = -0.825, p < 0.001) and reduction in muscle strength (R = 0.54, p = 0.031). The present...Continue Reading

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Citations

Feb 7, 2021·Diagnostics·Ivana Štětkářová, Edvard Ehler
Apr 23, 2021·Journal of Neurology, Neurosurgery, and Psychiatry·Nilo Riva, Angelo Quattrini
Jul 8, 2021·European Journal of Neurology : the Official Journal of the European Federation of Neurological Societies·Hatice TankisiHugh Bostock

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