The pattern of dermal papillae determines the early development of the epidermal ridges
. Early, in the fetal period, proliferation of the corium (dermis) forms papillary projections into the epidermis forming papillary ridges.
Patterns of epidermal ridges
have a role in diagnosing and delineating certain syndromes of congenital malformation  as well as in establishing twin zygosity  in anthropologic surveys  and in population genetics.
Table 2 shows the descriptive statistics of epidermal ridges
for male and female.
It was observed that patients had a greater number of epidermal ridges
between triradius B and triradius C of right hand and it was statistically significant difference (p= 0.026, p < 0.05).
A methodological approach to the development of the epidermal ridges
viewed on the dermal surface of fetuses.
By the 4th month, the epidermal ridges
are nicely developed, but the process is probably not complete before the 6th month of gestation (Alter).
Development of epidermal ridges
coincides exactly with the development of cochlea, so dermatoglyphic study in deaf mutes has an important logical bearing.
Epidermis of palms and soles has a characteristic pattern of epidermal ridges
appeared during intrauterine life.
Fingerprints are the friction ridge impressions of pattern formed by papillary or epidermal ridges
of terminal part of the finger.
Prenatal development of dermatoglyphic digital patterns: Associations with epidermal ridge
, volar pad and bone morphology, Collegium Antropologicum (1987) 11:297-303.
Palmar and plantar epidermal ridge
configurations (dermatoglyphics) in European Americans.
AIMS AND OBJECTIVES OF THIS STUDY: Despite the fact that the differences in epidermal ridge
density between men and women have been accepted for some time, they have only been thoroughly demonstrated in a small number of populations.