الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Dermatoglyphics is the study of epidermal ridges and it-configurations Harold Cummins(1961)was the first person to showt palm and finger tips could be of use in clinical medicine.
described a characteristic dermatoglyphic patterns in wn’s syndrome.
Mental retardation is an incomplete mental development.
is a chronic condition which may be either inborn or acquired
•ing early childhood(Kershaw 1966)). The majority of ntally retarded cases are inborn , arising either from editary defect or from damage to the central nervous system ore birth. (Yannet , 1966) by many different factors leading he various types of retardation. (Salter, 1971)
.Developmentally dermatoglyphics is generally recognized the 4th gestational weeks and is completed in about 16th week.
arly at the same time development of the nervous system.
Its during the 3rd week from the ectoderm on the dorsal face of the embryo between the primitive knots and the opharyngeal memebrane which becomes thickened to form neural plate. Organogenesis normally takes place in the first months ofintrauterine life. (Preus1972)