The psychological symptoms produced by the surgery were apathy, akinesia ( retarded movement or inertia ), loss of initiative ( present in one half of Moniz's patients; and in a few, prolonged ), catatonic " attitude, " mutism ( . . . observed in 11 of the 20 cases ), negativism, disturbed orientation in space and time, puerility ( one patient carried around and rocked dolls she had made ), kleptomania and abnormal hunger sensations ( experienced by one-quarter of the patients ).