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The muscle weakness that worsens with activity (abnormal muscle fatigue) in myasthenia gravis [67] is a symptom shared by other neuromuscular diseases. Most of the metabolic myopathies , such as McArdle disease (GSD-V), have abnormal muscle fatigue rather than fixed muscle weakness.
While there is no known cure, management strategies such as physical therapy, braces, and corrective surgery may alleviate symptoms. [9] Assisted ventilation may be required in those with weakness of breathing muscles. [6] Several drugs designed to address the root cause are currently available including gene therapy . [6]
Distal muscular dystrophy, also called distal myopathy, is essentially any muscle disease that preferentially affects the hands and/or feet, a much less common pattern than proximal muscle weakness. Late adult-onset type 1; Late adult-onset type 2a; Late adult-onset type 2b; Early adult-onset type 1; Early adult-onset type 2; Early adult-onset ...
Frailty is a common and clinically significant grouping of symptoms that occurs in aging and older adults. These symptoms can include decreased physical abilities such as walking, excessive fatigue, and weight and muscle loss leading to declined physical status.
A neuromuscular disease is any disease affecting the peripheral nervous system (PNS), [a] the neuromuscular junctions, or skeletal muscles, all of which are components of the motor unit. [4] Damage to any of these structures can cause muscle atrophy and weakness. Issues with sensation can also occur. Neuromuscular diseases can be acquired or ...
Neuromuscular junction diseases are a result of a malfunction in one or more steps of the above pathway. As a result, normal functioning can be completely or partially inhibited, with the symptoms largely presenting themselves as problems in mobility and muscle contraction as expected from disorders in motor end plates.
The causes are many and can be divided into conditions that have true or perceived muscle weakness. True muscle weakness is a primary symptom of a variety of skeletal muscle diseases, including muscular dystrophy and inflammatory myopathy. It occurs in neuromuscular junction disorders, such as myasthenia gravis. [citation needed]
Weakness (motor deficits) occurs in generalized fashion, rather than beginning in one region of the body and spreading. Limb and respiratory (diaphragm) muscles are especially affected. The muscles of the face are usually spared, but in rare cases, the eye muscles may be weakened, leading to ophthalmoplegia .