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Amyotrophic lateral sclerosis. Insights from genetics

R H Brown1

  • 1Day Neuromuscular Research Laboratory, Massachusetts General Hospital-East, Charlestown, USA. Brown@helix.mgh.harvard.edu

Archives of Neurology
|October 28, 1997
PubMed
Summary

Amyotrophic lateral sclerosis (ALS) is a progressive motor neuron disease causing paralysis. This fatal neurological disorder affects approximately 5 in 100,000 people, with onset typically around age 55.

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Area of Science:

  • Neurology
  • Neuroscience
  • Medical Research

Background:

  • Amyotrophic lateral sclerosis (ALS) is a severe neurological disease characterized by progressive paralysis.
  • It results from the degeneration of motor neurons in the brain and spinal cord, leading to muscle denervation, atrophy, and spasticity.
  • ALS affects both upper and lower motor neurons, with a mean age of onset at 55 years and a mean duration of approximately 4 years.

Purpose of the Study:

  • To provide a comprehensive overview of Amyotrophic Lateral Sclerosis (ALS).
  • To detail the clinical features, pathology, and epidemiology of ALS.
  • To differentiate between familial and sporadic forms of the disease.

Main Methods:

  • Review of existing medical literature and epidemiological data on ALS.
  • Analysis of clinical presentations, including motor neuron involvement and resulting symptoms.
  • Examination of genetic factors, distinguishing between inherited and sporadic cases.

Main Results:

  • ALS is characterized by relentless, lethal paralysis due to motor neuron loss.
  • The disease incidence is approximately 1 per 100,000 population, with total cases around 5 per 100,000.
  • Approximately 10% of ALS cases are inherited (familial), while the majority are sporadic, yet clinically similar.

Conclusions:

  • Amyotrophic lateral sclerosis is a devastating neurodegenerative disease with a significant impact on affected individuals.
  • Understanding the epidemiology and clinical characteristics is crucial for patient care and research.
  • While familial ALS is inherited, sporadic forms are more common, highlighting the need for broader research efforts.

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