Grading The severity of muscle weakness can be classified into different "grades" based on the following criteria: * Grade 0: No contraction or muscle movement. * Grade 1: Trace of contraction, but no movement at the joint. * Grade 2: Movement at the joint with gravity eliminated. * Grade 3: Movement against gravity, but not against added resistance. * Grade 4: Movement against external resistance with less strength than usual. * Grade 5: Normal strength. Classification Proximal and distal Muscle weakness can also be classified as either "proximal" or "distal" based on the location of the muscles that it affects. Proximal muscle weakness affects muscles closest to the body's midline, while distal muscle weakness affects muscles further out on the limbs. Proximal muscle weakness can be seen in Cushing's syndrome and hyperthyroidism. True and perceived Muscle weakness can be classified as either "true" or "perceived" based on its cause. * True muscle weakness (or neuromuscular weakness) describes a condition where the force exerted by the muscles is less than would be expected, for example muscular dystrophy. * Perceived muscle weakness (or non-neuromuscular weakness) describes a condition where a person feels more effort than normal is required to exert a given amount of force but actual muscle strength is normal, for example chronic fatigue syndrome. In some conditions, such as myasthenia gravis, muscle strength is normal when resting, but true weakness occurs after the muscle has been subjected to exercise. This is also true for some cases of chronic fatigue syndrome, where objective post-exertion muscle weakness with delayed recovery time has been measured and is a feature of some of the published definitions.
symptom of Hypotonia
symptoms of Hypotonia
symptom of Akathisia
symptom of Cerebral palsy
symptom of Lightheadedness
symptom of Bulbar palsy
symptom of General paresis of the insane
symptom of Botulism