Lateral amyotrophic sclerosis (illness of a motor neurone) - steadily progressing paresises of extremities and the bulbar frustration caused by a selective lesion of both neurones of a way.

The etiology of disease is not established.

Signs, current. Disease begins with an atrophy of muscles and delicacy of brushes is more often, consensual reductions of separate fascicles of muscular fibers in various groups of muscles, including and muscles of tongue are simultaneously found out. Atrophies and paresises gradually extend, appear attributes of a bulbar syndrome (a dysphagia, a dysarthtia, a dysphonia). In the developed stage of illness the opportunity of independent movement because of serious paralyses of extremities is lost. Speech becomes illegible, the swallowing is sharply complicated. Characteristic feature at the majority of patients - a combination of attributes of a peripheric and central paralysis (atrophies and it is sharp reinforced reflexes of tendons).