Myopathy and physiotherapy - طـبيـعي للعلاج الطبيعي والتأهـيل الطبي
 
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افتراضي  Myopathy and physiotherapy
كُتبَ بتاريخ: [ 12-05-2008 - 09:56 PM ]
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الصورة الرمزية Sultan AlEnad PT
 
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Introduction to Myopathy

A myopathy is a general term for a disease affecting the muscles of the body. This commonly leads to muscle weakness, muscle wastage and reduced mobility.

What is a Myopathy?


A myopathy is a general term for a disease that affects the skeletal muscle (those which attach to bones). Skeletal muscles are the muscles that move the joints of the body.


Myopathies are often caused by inherited genetic defects. The most common being Duchenne and Becker muscular dystrophies.


Risk factors for other myopathies include the following:
  • Autoimmune disorders (eg. thyroiditis)
  • Exposure to toxins (eg. herbicides, insecticides, flame retardant chemicals)
  • Endocrine disorders (eg. Cushing syndrome, hypothyroidism, hyperthyroidism, Addison disease)
  • Infection (eg. HIV, Lyme disease, trichinosis)
  • Vitamin D deficiency, vitamin E or A toxicity
  • Medication (eg. some antihistamines, long-term corticosteroid use)
  • Metabolic disorder (eg. glycogen and lipid storage diseases)
Types of Myopathies

There are many different types of myopathies. These can be described as;
  • Inherited myopathies
  • Endocrine myopathies
  • Inflammatory myopathies
  • Toxic myopathies
Inherited myopathies


Inherited myopathies are caused by a genetic defect. The most common muscular dystrophies, Duchenne and Becker muscular dystrophy, result from a genetic defect on the X chromosome.




Endocrine myopathies


Endocrine myopathies are caused by the over or underproduction of hormones. These conditions can develop in children and adults and usually respond well to treatment.
  • Steroid myopathy is the most common endocrine muscle disease. Steroid excess, whether caused by an adrenal gland disorder (eg. Addison disease) or chronic administration of steroids, causes muscle weakness and wasting.
  • Hyperthyroid myopathy is caused by the thyroid gland producing too much thyroxine. Its symptoms include weakening and wasting of the muscles, especially in the shoulders and hips, and sometimes the eyes.
  • Hypothyroid myopathy is caused by the underproduction of thyroxine and results in muscle weakening in the legs and arms. The muscles may become enlarged.
  • Cushing's disease, characterized by overproduction of hormones produced by the pituitary and adrenal glands, causes myopathy.
  • Excess parathyroid hormone results in hypercalcemia, which causes proximal muscle pain and weakness.
  • Hormone-secreting tumors can also cause endocrine disorders that cause myopathies.
Inflammatory myopathies


Inflammatory myopathies are autoimmune disorders (ie. the body's immune system mistakenly attacks healthy tissue). In the case of myopathies, it attacks healthy muscle fibres and causes inflammation, which in turn damages the muscle.
  • Polymyositis (PM) causes muscle aches, cramping, and tenderness. The muscle weakness is severe and may fluctuate over weeks to months. It is often worse in the neck, arms, and thighs, making it difficult to stand up from a sitting position. Many patients also experience fever and loss of appetite.
  • Dermatomyositis (DM) is characterised by a skin rash as well as muscle symptoms of PM. The rash is a purple discoloration around the eyes and on the cheeks but may also appear on other parts of the body. Eventually the skin becomes thin and fragile. DM most commonly develops in children between the ages of 5 and 14 years.
Toxic myopathies


Toxic myopathies are caused by exposure to certain medications and chemicals. Excessive alcohol intake can also damage skeletal muscle. Drugs and chemicals that can cause myopathy include the following:
  • Anesthetics (eg. lidocaine, mepivacaine, ethyl chloride)
  • Cholesterol lowering medication (eg. clofibrate, genfibrozil, lovastatin, simivastatin, niacin)
  • Glucocorticoids (eg. triamcinolone, dexamethasone, betamethasone)
  • Narcotics (eg. cocaine, heroin, meperidine)
  • Other drugs (eg. zidovudine, D-penicillamine, procainamide, chloroquine, gallamine)
  • Herbicides, insecticides, flame retardants
Myopathy Physiotherapy


The specialist neurological physiotherapists can help control symptoms, such as muscular weakness and spasms, and enable patient to maintain a good quality of life. Treatment usually includes stretching and strengthening programmes to help maintain muscle strength and flexibility.



The benefits of physiotherapy are:

increased muscle strength


increased balance


increased flexibility


reduced risk of falls


Physiotherapy can also:


stop the development of muscular and joint contractures


provide equipment for mobility if required ie. walking aids, orthoses, callipers and wheelchairs


advise on moving and handling techniques and equipment


refer to other appropriate medical health professionals, with your consent


anticipate and minimise other secondary complications of myopathies

توقيع : Sultan AlEnad PT

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