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Myotonia is the defining symptom of many channelopathies (diseases of ion channel transport) such as myotonia congenita, paramyotonia congenita and myotonic dystrophy. [3] [4] Brody disease (a disease of ion pump transport) has symptoms similar to myotonia congenita, however, the delayed muscle relaxation is pseudo-myotonia as the EMG is normal ...
Potassium-aggravated myotonia is a rare genetic disorder that affects skeletal muscle. [2] Beginning in childhood or adolescence, people with this condition experience bouts of sustained muscle tensing ( myotonia ) that prevent muscles from relaxing normally.
Myotonia congenita is a congenital neuromuscular channelopathy that affects skeletal muscles (muscles used for movement). It is a genetic disorder.The hallmark of the disease is the failure of initiated contraction to terminate, often referred to as delayed relaxation of the muscles and rigidity. [1]
Myotonic dystrophy (DM) is a type of muscular dystrophy, a group of genetic disorders that cause progressive muscle loss and weakness. [1] In DM, muscles are often unable to relax after contraction. [1]
People with this disorder usually show the following symptoms: axonal neuropathy, atrophy (wasting/degeneration) of the muscles in the hands, feet and legs, chronic muscular weakness which is very apparent when exercise is being done, abnormal gait, high chance of accidental falls, and joint contractures, neuromyotonia, and myokymia.
NMT is a diverse disorder. As a result of muscular hyperactivity, patients may present with muscle cramps, stiffness, myotonia-like symptoms (slow relaxation), associated walking difficulties, hyperhidrosis (excessive sweating), myokymia (quivering of a muscle), fasciculations (muscle twitching), fatigue, exercise intolerance, myoclonic jerks and other related symptoms.
The two are featured in the book Haatchi & Little B (2014, ISBN 125-006-936-X) by Wendy Holden [11] and on Haatchi's Facebook page. [12] In 2016, 9-year-old Owen was featured in a TLC documentary series, Two in a Million , in which he met and formed a friendship with Giovanni, a 7-year-old American boy with SJS.
Brody myopathy, also called Brody disease, [1] is a rare disorder that affects skeletal muscle function. [2] BD was first characterized in 1969 by Dr. Irwin A. Brody at Duke University Medical Center. [3]