Note in addition the form of the line of roots; it ought to be, as we have already said, sinuous; sometimes, on the contrary, this line is straight, and forms a uniform curve, without sinuosity, across the forehead (imbeciles); at other times it descends in a peak at the middle point of the forehead.
b. Vortices.—Normally, there ought to be one central whorl or vortex over the sinciput.
Abnormally it may happen:
That the vortex is misplaced—above, below or laterally;
That the vortex is double;
That there are also vortices along the frontal line of roots, or near this line.
3. Form.—It sometimes happens that we find in degenerates forms of hair that are normal in inferior races, i.e., smooth hair, or kinky, wooly hair.
Grey Hair.—Sometimes in the case of degenerates or those suffering from dystrophy, a precocious greyness occurs (grey-haired young men, children with white hair); or a partial congenital greyness (clumps of white hair). No form of grey hair, however, should be confused with albinism.
Anomalies relating to the Eyebrows and the Beard. The Eyebrows.—Various anomalies may occur, in respect to the quantity of hair, and the form of the eyebrows.
The hairs may be too abundant or too scanty.