Benign sleep myoclonus

It is characterized by repetitive myoclonic jerks occurring during sleep which are typically in the distal more than proximal limbs, and more prominent in the upper than the lower extremities.
It begins during the first week of life, diminishes in the second month, and is usually disappears before 6 months of age.
The movements occur most likely during quiet (non-REM) sleep but have been described in all sleep stages.Waking the baby causes the movements to abruptly cease.
Episodes of myoclonus are not associated with eye deviation, oral movements, apnea, color changes, or crying, which can distinguish them from seizures.
Neurologic examination is normal. Ictal and interictal EEG are typically normal.
Treatment is not required and neurologic outcome is normal.