“…These movements are rhythmic, may intensify during stress, but are partially controllable by the patient and disappear during sleep [11]. At least 81 other cases have already been described before our cases [2,3,5,8,14,15,17,20] which have a particular clinical character due to the predominance of ‛‛non-non laterality movements''. Since the first description in 1966 [1], the consistency of intracerebral cystic abnormalities has been noticed but the direct causal link remains for the moment subject to controversies.…”