Weakness

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Weakness

Weakness (/ˈwiːknɪs/), also known as Asthenia, is a symptom of a number of different conditions. The causes are many and can be divided into conditions that have true or perceived muscle weakness. True muscle weakness is a primary symptom of a variety of skeletal muscle diseases, including Muscular dystrophy and congenital myopathy. It occurs in Neuromuscular disease due to muscular weakness. Perceived weakness (or non-neuromuscular) describes a condition where a person feels more effort than normal is required to exert a given amount of force but actual muscle strength is normal.

Etymology

The term "weakness" comes from the Old Norse word "veikr", which means "lacking strength".

Related Terms

  • Fatigue: A subjective feeling of tiredness that has a gradual onset. Unlike weakness, fatigue can be alleviated by periods of rest.
  • Myopathy: A disease of the muscle in which the muscle fibers do not function properly, resulting in muscular weakness.
  • Neuropathy: A disturbance of function or pathological change in a nerve.
  • Atrophy: Partial or complete wasting away of a part of the body.

See Also

External links

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