[Neglect--the frequently neglected syndrome of neglect].

In daily clinical practice "neglect" is the term for a syndrome following a right parietal lesion with inability of the patient to concentrate on events on the left side. A patient is described who was admitted for headaches and in whom neurologic investigation revealed left sided neglect as the only sign. A glioma of the right hemisphere was found. The clinical search for neglect is described and possible mechanisms are discussed. Neglect is regarded as a disturbance of directed attention. The arguments in favour of attributing dominance for this function to the right hemisphere are presented.