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ABSTRACT
In this study an attempt has been made to correlate the age and the angles of triradius along with the gender variation in angles. It was found that there was no significant difference between atd angles between male and female and there was significant difference between male and female in dat and adt angles. On the other hand the correlation study of angle with age between male and female indicated strong positive correlation for angle adt, weak positive correlation for angle atd and strong negative correlation for dat angle. Thus neither age nor angle is the reason for increasing or decreasing the value of other as correlation does not mean causation.
Keywords: ATD, DAT and ADT Angle, Palm Prints, Biometrics, Investigation
INTRODUCTION
Dermatoglyphic patterns of the hand are unique to an individual in which atd angle is of paramount importance in forensic science and criminal investigation apart from medical field. This is true of all the skin-ridge patterns on the surface of the hand as a whole, and especially to the science of fingerprints as these patterns do not change. Among which palm prints study could have greater relevance in near future apart from fingerprints as it has got numerous applications in different areas of science apart from human identification and one characteristic among them is angle atd, dat and adt. At the base of the palm, there are usually four triradii: a, b, c, and d (see Figure 1). An axial triradius (t) is usually located near the point where the palm is connected to the wrist. This angle is formed by lines drawn from the digital triradius (a) to the axial triradius (t) and from this triradius to the digital triradius (d). The more distal the position oft', the larger the atd angle. Sometimes accessory 'a' or'd' triradii are present on the palm. Thus the atd angle is a dermatoglyphic trait formed by drawing lines between the triradii below the first and last digits and the most proximal triradius on the hypothenar region of the palm. This trait has been extensively used in dermatoglyphic studies with major applications in medical sciences.
Two percent of normal individuals have this triradius positioned near the center of the palm (termed t"). A triradius...