Overview

Amyotrophic Lateral Sclerosis (ALS) is a motor neuron disease, which is a group of neurological disorders that selectively affect motor neurons, the cells that control voluntary muscles of the body. The disorder causes muscle weakness and atrophy throughout the body due to the degeneration of the upper and lower motor neurons. Current drugs approved for ALS treatment only modestly slow disease progression.

Transcranial direct current stimulation (tDCS) is a non-invasive technique, which has been demonstrated to modulate cerebral excitability in several neurodegenerative disorders and modulate intracortical connectivity measures.

In this randomized, double-blind, sham-controlled study followed by an open-label phase, the investigators will evaluate whether a repetition of two-weeks' treatment with bilateral motor cortex anodal tDCS and spinal cathodal tDCS, after a six months interval, may further outlast clinical improvement in patients with amyotrophic lateral sclerosis and can modulate intracortical connectivity, at short and long term.

Eligibility

Inclusion Criteria:

• Patients with a diagnosis of probable, laboratory-supported probable, or definite amyotrophic lateral sclerosis according to the El Escorial revised criteria
• Disease duration 24 months
• Disease progression in the past 3 months
• Score 2 at the item "swallowing" of the ALS Functional Rating Scale Revised
• Score 2 at the item "walking" of the ALS Functional Rating Scale Revised
• Treatment with steady regimen of riluzole for a minimum of 1 month before study entry, and desiring its continuation
• Able to give informed consent
• Written informed consent

Exclusion Criteria:

• Motor neuron diseases other than ALS
• Severe head trauma in the past
• History of seizures
• History of ischemic stroke or hemorrhage
• Pacemaker
• Metal implants in the head/neck region
• Severe comorbidity
• Intake of illegal drugs
• Pregnancy