Further SEM observation of human scalp hair: statistical research.

Scalp hair of 100 somalian subjects (50 males and 50 females) were examined with SEM at standard magnification (X 1.000). On each specimen, the hair diameter, mean scale height (M.S.H.), scale index (S.I.), mean scale number (M.S.N.) and mean scale width (M.S.W.) were searched. The statistical elaboration of the obtained data indicates that: i) the hair diameter and M.S.N. are greater in the males, while the other parameters (M.S.H., M.S.W. and S.I.) are prevalent in the females; ii) the hair diameter is directly correlated with M.S.W. and M.S.N., while M.S.H. shows a direct correlation with M.S.W. and an inverse on with M.S.N.. From the comparison between these results and those previously obtained in 100 subjects of white race it results that: a) the mean hair diameter as well as M.S.W. are greater in the white subjects; b) M.S.N., M.S.H. and S.I. are prevalent in the somalians.