Muscle Disorders are the diseases and disorders that affect the human muscle system and their main manifestation is skeletal muscle weakness. The terms ‘muscular dystrophy’, ‘neuromuscular conditions’ and ‘neuromuscular disorders’ fall under the umbrella of the term ‘Muscle Disorders’. These disorders are a large group of conditions which affect either the muscles, such as those in the arms and legs or heart and lungs, or the nerves which control the muscles[1]. Disorders of muscle may cause weakness or paralysis in the presence of an intact nervous system.
Muscle disorders can be classified on the basis of :
Primary or secondary : Diseases and disorders as a result of direct abnormalities of the muscles are considered primary muscle diseases, Eg. Polymyositis. And Diseases that are secondary to another condition and may have caused muscle damage, Eg. diseases due to endocrine issues.
Genetic or Acquired
Neuromuscular or Myopathies
Common types of Muscle Disorders include
Myopathies eg Polymyositis, Dermatomyositis, Duchenne Muscular Dystrophy, Steroid induced myopathy
Cramp: prolong painful involuntary contraction of skeletal muscles
Fibrositis: Inflammation of fibrous connective tissues in muscles.it also effect muscles of trunk and back.
Myasthenia Gravis
Rhabdomyolysis
Cardiac Myopathy: Coronary Artery Disease
Amyotrophic Lateral Sclerosis
Sarcopenia: This muscle disease can be primary or secondary. Sarcopenia causes muscle mass loss and muscle strength loss.
