<unk> , also referred to as jactatio capitis nocturna, is a condition characterized by repetitive banging or rocking motions just before and during light sleep. This condition occurs primarily in infants and young children, although adults can be affected as well. While rarely harmful, it can be alarming or confusing to parents or others who witness it occurring.
Rhythmic Movement Disorder
Essential tremor
Tardive dyskinesia
Akinetic-rigid syndromes
Stiff person syndrome
Neurasthenia
Myotonia congenita
Parkinsonism