Certain disturbances of a higher order, e.g. aphasia and agnosia, follow as a rule a lesion of the left hemisphere in right-handed persons and vice versa. This dominance of one hemisphere for certain functions has been well established from abundant material. The Gerstmann Syndrome, recently studied, seems to obey the same rule of dominance; other disorders, such as the attitude toward paralysed limbs and defective functions, appear to be caused by lesions of the non-dominant hemisphere. The relations of the latter group, however, to the hemisphere cannot be regarded as firmly established, since the material presented is still limited.