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Forschungsdatenbank PMU-SQQUID

Changes in motor cortex excitability during muscle fatigue in amyotrophic lateral sclerosis.
Nardone, R; Buffone, E; Florio, I; Tezzon, F
J NEUROL NEUROSUR PS. 2005; 76(3): 429-431.
Originalarbeiten (Zeitschrift)

PMU-Autor/inn/en

Nardone Raffaele

Abstract

To further investigate the pathophysiology of amyotrophic lateral sclerosis (ALS), the silent period (SP) evoked by transcranial magnetic stimulation during a fatiguing muscle contraction was evaluated in 15 patients and in 15 healthy subjects. Physiological lengthening of the SP duration was not observed in patients with disease duration of greater than or equal to 2 years. Decreased intracortical inhibition, probably secondary to dysfunction of the inhibitory interneurons that modulate the corticomotoneuronal firing, appears in later stages of disease. Normal motor cortex adaptation is impaired and cortical hyperexcitability might be unmasked during fatigue in ALS patients with longer disease duration.


Useful keywords (using NLM MeSH Indexing)

Adult

Aged

Amyotrophic Lateral Sclerosis/physiopathology*

Case-Control Studies

Disease Progression

Evoked Potentials

Female

Humans

Magnetics

Male

Middle Aged

Motor Cortex/pathology

Motor Cortex/physiology*

Muscle Fatigue*

Time Factors