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Flaccid Paralysis

Flaccid Paralysis describes a condition in which people experience limp, floppy muscles that lack firmness, due to lack of activity in these muscles. Voluntary control over these muscles has been lost and they are unable to contract. This can result from diseases such a Polio and West Nile Virus as well as  Neuromuscular diseases such as Myasthenia Gravis.

Sometimes when we block the blood flow to a part of our body the area grows numb and we can not move the muscles in that area until the blood flow returns. This is a flaccid symptom.

Causes of Flaccid Paralysis

  • Anterior spinal artery syndrome, in which the anterior spinal artery is blocked. Blockage can be caused by spinal cord trauma, cancer, arterial disease, or thrombosis.
  • Chemical poisoning
  • Central pontine myelinolysis— The protective layer around the brainstem nerve cells is destroyed, preventing the transmittal of nerve signals
  • Hyperkalemia— Caused by an excess of potassium in the body
  • Hypokalemic periodic paralysis— An inherited muscle condition characterized by severe episodes of paralysis and muscle weakness which can last for hours or days
  • Japanese encephalitis— A form of encephalitis transmitted by mosquitoes



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