<unk>  is a lack of<unk>  strength. Its causes are many and can be divided into conditions that have either true or perceived<unk> . True<unk>  is a primary symptom of a variety of skeletal<unk>  diseases, including muscular dystrophy and inflammatory myopathy. It occurs in neuromuscular junction disorders, such as myasthenia gravis.<unk>  can also be caused by low levels of potassium and other electrolytes within<unk>  cells. It can be temporary or long-lasting (from seconds or minutes to months or years). The term myasthenia is from my- from Greek μυο meaning<unk> " + -asthenia ἀσθένεια meaning<unk> ".
Muscle weakness
Muscle atrophy
Muscle imbalance
Paresis
Gastroparesis
Facial weakness
Peripheral edema
Dysuria