Three basic hair patterns of the scalp are recognized. These are totopilose, indentato‐pilose, and indentato‐circulo‐pilose. The indentato‐pilose has the highest incidence in both white and Negro males, and the totopilose is over four times more common in the Negroes than in the whites. The indentato‐pilose has high correlation with the pecto‐sterno‐infraclavicular chest hair pattern in both groups.
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Laurel Raymond Setty (1970) studied this question.
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