Myotonia
Classification and external resources
ICD-10 G71.1
ICD-9 359.2
DiseasesDB 23079
MeSH D009222

Myotonia is a symptom of a small handful of certain neuromuscular disorders 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. However, prolonged, rigorous exercise may also trigger the condition. 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.

Myotonia can affect all muscle groups; however, the pattern of affected muscles can vary depending on the specific disorder involved.

People suffering from disorders involving myotonia can have a life-threatening reaction to certain anaesthetics; one of these conditions occurs when the patient is under anaesthetic and is termed "Malignant hyperthermia".

Causes [link]

It may be acquired and or inherited, and is caused by an abnormality in the muscle membrane—specifically, the ion channels that controls the contraction of muscle fibers. Myosin is defective in myotonia. Myotonia is a symptom commonly seen in patients with myotonic muscular dystrophy, of which two documented types and one speculated type exist, 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), such as Myotonia Congenita (Congenital Myotonia) of which two types called Becker's Disease and Thomsen's Disease exist. There is also a disorder called Paramyotonia Congenita. Myotonia arises from channelopathies, and myotonic muscular dystrophy can be exacerbated by exposure to cold (and occasionally heat); by eating foods that are potassium-rich (such as bananas); with exertion, especially after long periods of inactivity; sudden surprises; and stressful situations.

Symptoms of myotonia are more frequently experienced in women during pregnancy.

Myotonia is not always a disease-related or abnormal phenomenon. Humans and other animals (such as the fainting goat) 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.

See also [link]

External links [link]
Neuromuscular-
junction disease
Myopathy/
congenital myopathy
Other structural
Myotonia
Other
MELAS · MERRF · KSS · PEO
Other

M: MUS, DF+DRCT

anat (h/n, u, t/d, a/p, l)/phys/devp/hist

noco(m, s, c)/cong(d)/tumr, sysi/epon, injr

proc, drug (M1A/3)

https://wn.com/Myotonia

Podcasts:

Email this Page Play all in Full Screen Show More Related Videos
PLAYLIST TIME:

Just Rock N Roll

by: Midtown

you can never tell me i shouldn't walk away
its foolish to assume that ill be coming back another day
you were never right and i was never wrong
does truth lie in sincerity of another sullen song
cause you were right then i should have been the one to release it
its coming back to tease me
but i was just born and you're pride was too strong
can you change it?
are you willing to face it?
you can tell your story and coat it any way
but you will never change who you trying to play
now your friends are falling out
they know you just don't care
they know you never did
because they say always
the first one is never as good as the next.
hey, it's just rock and roll
even though you might think you lost it all.
cause the times they are a changin
and who can predict what's next
hey, you lost control
even though you might have thought you had it all
and hey, it's just rock and roll
and i'll never change
i love it just the same
i'll never change
because i love it just the same
god i wish i could hate you the rest of my life
god i wish i could hate you for the rest of my
nothing would make me happier




×
×
×
×