DYSTROPHIA myotonica (Steinert's disease) is an uncommon disorder usually characterized by symptoms referable to the voluntary muscles of the head, neck and extremities including difficulty with ...

PROF. A. C. WRIGHT contributes an interesting paper “on the nature of the physiological element in emotion” to Brain (parts 70 and 71), the object of which is to apply the results obtained by ...

Sleep myoclonus is involuntary, nonrhythmic muscle twitching that occurs either as a person falls asleep or during sleep. The movements include hiccups, starts, and jerks. Sleep myoclonus is not a ...

Involuntary movements include tremors, muscle spasms, tics, and others. Some medical conditions that affect muscles, nerves, the brain, or spinal cord can cause them, such as multiple sclerosis, ...