Myotonia is a neuromuscular disorder characterized by the slow relaxation of the muscles after voluntary contraction or electrical stimulation. Generally, repeated effort is needed to relax the muscles, and the condition improves after the muscles have warmed-up. Individuals with the disorder may have trouble releasing their grip on objects or may have difficulty rising from a sitting position and a stiff, awkward gait. The following codes are used with International Statistical Classification of Diseases and Related Health Problems. ... The following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. ... Main Entry: neu·ro·mus·cu·lar Pronunciation: nur-O-m&s-ky&-l&r, nyur- of or relating to nerves and muscles; especially : jointly involving nervous and muscular elements <a neuromuscular junction> ...
The disorder can affect all muscle groups. It may be acquired or inherited, and is caused by an abnormality in the muscle membrane. Myotonia is a symptom commonly seen in patients with myotonic muscular dystrophy and in a group of disorders called channelopathies (hereditary diseases that are caused by mutations in the chloride, sodium or potassium ion transport channels in the muscle membrane). Myotonia arising from channelopathies can be exacerbated by exposure to cold, by eating foods that are potassium-rich (such as bananas), and with exertion. The muscular dystrophies are a group of genetic and hereditary muscle diseases; characterized by progressive skeletal muscle weakness, defects in muscle proteins, and the death of muscle cells and tissue. ... The chanellopathies are human diseases linked to mutations in genes coding for ion channel subunits or proteins that regulate them. ...
Myotonia is not always a disease-related or abnormal phenomenon. Humans and other animals often display myotonia when placed in situations of extreme stress or fear; a resultant increase in 'fight-or-flight' hormones such as epinephrine and cortisol may cause increased muscle tension throughout the body. Cortisol is a corticosteroid hormone that is involved in the response to stress; it increases blood pressure and blood sugar levels and suppresses the immune system. ...
Myotonia is a neuromuscular disorder characterized by the slow relaxation of the muscles after voluntary contraction or electrical stimulation.
Myotonia is a symptom commonly seen in patients with myotonic muscular dystrophy and in a group of disorders called channelopathies (hereditary diseases that are caused by mutations in the chloride sodium or potassium channels that affect the muscle membrane).
Myotonia also may be triggered by exposure to cold.
Myotonia congenita is an inheritable congenital (present from birth) disorder characterized by slow relaxation of voluntary muscles, such as those in the legs.
Myotonia congenita can be either an autosomal dominant or autosomal recessive disease.
The cause of myotonia congenita is believed to be an abnormality in the chloride channels of muscle cells (chloride ions are required for a muscle to relax).
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