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Hypokalemic periodic paralysis is a condition that causes episodes of extreme muscle weakness typically beginning in childhood or adolescence. Most often, these episodes involve a temporary inability to move muscles in the arms and legs. Attacks cause severe weakness or paralysis that usually lasts from hours to days.
Its causes are many and can be divided into conditions that have either true or perceived muscle weakness. True muscle weakness is a primary symptom of a variety of skeletal muscle diseases, including muscular dystrophy and inflammatory myopathy. It occurs in neuromuscular junction disorders, such as myasthenia gravis. Muscle weakness can also ...
Bulbar (throat) muscle weakness is a main feature of nemaline myopathy. Individuals with the most severe forms of NM are unable to swallow and receive their nutrition through feeding tubes. Most people with intermediate and mild NM take some or all of their nutrition orally. Bulbar muscle impairment may also lead to difficulty with communication.
The assumed cause of muscle hypertrophy in KDSS is an abnormal metabolism of carbohydrates leading to increased glycogen accumulation and increased mucopolysaccharide deposits in the muscles. [13] Yet another speculation is an excess intra cellular calcium due to ineffective reuptake into the sarcoplasmic reticulum, which causes a sustained ...
Motor neuron diseases affect both children and adults. [5] While each motor neuron disease affects patients differently, they all cause movement-related symptoms, mainly muscle weakness. [6] Most of these diseases seem to occur randomly without known causes, but some forms are inherited. [2]
[1] [5] Skeletal muscle weakness is a characteristic feature. It more evident in the proximal muscles of the extremities. Facial and neck weakness have also been reported. [6] Scoliosis is a side curvature or abnormal deviation of the spine with an element of rotation. Scoliosis is usually rigid and progressive. It may be accompanied by ...
Rare hereditary defects of muscular ion channels and transporters that cause hypokalemic periodic paralysis can precipitate occasional attacks of severe hypokalemia and muscle weakness. These defects cause a heightened sensitivity to the normal changes in potassium produced by catecholamines and/or insulin and/or thyroid hormone, which lead to ...
Congenital myopathy is a very broad term for any muscle disorder present at birth. This defect primarily affects skeletal muscle fibres and causes muscular weakness and/or hypotonia. Congenital myopathies account for one of the top neuromuscular disorders in the world today, comprising approximately 6 in 100,000 live births every year. [1]