search buttonmobile navigation expand button

The information contained on this page is provided as general health information and is not intended to substitute as medical advice and direction from your physician or health care provider. Please direct any questions related to your health care provider. In an emergency, call 9-1-1 or go to the nearest emergency center.


Muscle disorder

Definition

A muscle disorder includes patterns of weakness, electromyogram (EMG) findings, or biopsy results that suggest a muscle problem. The muscle disorder can be inherited, such as muscular dystrophy, or acquired, such as alcoholic or steroid myopathy.

The medical name for muscle disorder is myopathy.

Alternative Names

Myopathic changes; Myopathy; Muscle problem

Symptoms

The main symptom is weakness.

Other symptoms include cramps and stiffness.

Exams and Tests

Blood tests sometimes show abnormally high muscle enzymes. If a muscle disorder might also affect other family members, genetic testing may be done.

When someone has symptoms and signs of a muscle disorder, tests such as an electromyogram, muscle biopsy, or both can confirm whether it is a myopathy. A muscle biopsy examines a tissue sample under a microscope to confirm disease. Sometimes, a blood test to check for a genetic disorder is all that is needed based on someone's symptoms and family history.

Treatment

Treatment depends on the cause. It usually includes:

  • Bracing
  • Medication
  • Physical therapy
  • Preventing the condition from getting worse by treating the underlying condition causing the muscle weakness
  • Surgery (sometimes)

Your health care provider can tell you more about your condition and treatment options.

visHeader

Superficial anterior muscles

References

Borg K, Ensrud E. Myopathies. In: Frontera WR, Silver JK, Rizzo TD, eds. Essentials of Physical Medicine and Rehabilitation: Musculoskeletal Disorders, Pain, and Rehabilitation. 3rd ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 135.

Selcen D. Muscle diseases. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 421.