Signs and Symptoms of Movement Disorders
Signs and symptoms of movement disorders vary and depend on the type and severity of the condition. The severity of movement disorder symptoms can be affected by factors such as anxiety, fatigue, medication, and stress.
Some movement disorders cause hyperkinesiaexcessive spontaneous movement or abnormal involuntary movementand others cause hypokinesiaabsent or reduced ability to perform purposeful movement.
Abnormal movements may be rhythmical (e.g., essential tremor) or irregular, and may be rapid and jerky (e.g., tics) or slowed and sustained (e.g., Parkinson's disease, dystonia). In most cases, irregular movement cannot be consciously controlled or suppressed.