<unk>  is a symptom of a number of different conditions. The causes are many and can be divided into conditions that have true or perceived muscle<unk> . True muscle<unk>  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.
Weakness
Baricity
Spasticity
Pain out of proportion
Waxy flexibility
Hyperintensity
Whispered pectoriloquy
Lusitropy