Myopathy

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myopathy

[mī′äp·ə·thē]
(medicine)
Any disease of the muscles. Also known as myopathia.

Myopathy

 

progressive muscular dystrophy; a hereditary disease.

Myopathies can be transmitted as autosomal recessive or dominant, or sex chromosome-linked traits. Myopathies result from metabolic disturbances in muscle cells and a change in the biosynthesis of nucleic acids; the degradation of muscle proteins is considerably more rapid than their biosynthesis. In myopathies, muscles become flaccid and some of the fibers are replaced by fatty tissue. Electron microscopy reveals structural changes in the membranes of muscle cells. The main symptoms of the disease are increasing muscular weakness, symmetrical muscular atrophy, decrease in tendon reflexes and, in the later stages, bone and joint deformity. Autonomic trophic nerve functions are invariably impaired.

Myopathy is treated with anticholinesterase preparations, anabolic hormones, and vitamins B and E. Preventive measures include early diagnosis and detection of the heterozygous carrier state for the myopathy gene by using electrophysiological and biochemical tests.

REFERENCES

Badalian, L. O., V. A. Tabolin, and Iu. V. Vel’tishchev. Nasledstvennye bolezni u detei. Moscow, 1971.
Hausmanowa-Petrusewicz, I. Myshechnye zabolevaniia. Warsaw, 1971. (Translated from Polish.)

L. O. BADALIAN

References in periodicals archive ?
Basic labs for investigating suspected metabolic myopathy include serum electrolytes, glucose, LFTs, CK (which may or may not be elevated), lactate, ammonia, and UA for myoglobinuria.
Supporting our findings, both “sandwich” and “target” signs are very rare in other neuromuscular disorders in the literatures, such as Duchenne muscular dystrophy,[sup][10],[22] lipid metabolic myopathy,[sup][23] inflammatory myopathy,[sup][8] LGMD2A,[sup][24] Emery-Dreifuss muscular dystrophy,[sup][25],[26],[27] and congenital muscular dystrophy with rigid spine syndrome (RSMD1).
Key Words: metabolic myopathy, mitochondrial myopathy, side effect, adverse reaction, neuromuscular disorder, respiratory chain