Lithium-induced improvement of myotonia.

Colchicine-induced myopathy with myotonia.

Patient: A 79-year-old man presented with progressive weakness especially in the muscles of his lower limbs for about ten days before admission. He was diabetic, hypertensive and had coronary arterial disease with congestive heart failure for many years. He also had chronic renal insufficiency with a serum creatinine of 1.9 mg/dL. He had been treated with colchicine for gouty arthritis for the ...

Teaching video neuroimages: cold-induced eyelid myotonia.

A 48-year-old man presented with episodic paraplegia and stiffness of hands, face, and tongue, along with eyelid myotonia when exposed to cold temperature, which he had since childhood. Eyelid myotonia was evoked either by exposure to cold weather (video on the Neurology® Web site at www.neurology.org and figure 1) or by forceful eye closure. Myotonia was elicited with percussion of the tongue ...

Drug-induced Myotonia in Intercostal Muscle

used pharmaceutical agents, were investigated in excised human external intercostal muscle. The effects of anthracene-9-carboxylic acid (9-AC), a well-known myotonia-producing chemical, were also tested for comparison. In the presence of these drugs the electrical threshold was lowered, and a constant current pulse produced multiple spiking. Short trains of direct stimuli were often followed by...

Myotonia fluctuans.

Autosomal-dominantly inherited nondystrophic myotonic disorders are an interesting group of muscle diseases that provide considerable opportunity for future molecular genetic studies to identify the genes responsible for specific membrane functions. A family with such a myotonic disorder is described with features that are distinctly different from myotonia congenita and paramyotonia congenita....

Myotonia Acquisita