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Dr. Talbot believes that "developmental pathology does not receive the attention which its relations to the etiologic moment of disease and disorder merit"; therefore he attempts to explain many defects, both mental and physical, on phylogenetic and ontogenetic grounds. Every deviation from the normal is considered a defect and hence a stigma of degeneration to be explained by phylogeny or ontogeny. The great difficulty, however, which the author meets constantly is the establishment of a normal. Man has reached his present state as a result of evolution and is still undergoing evolutionary changes. Hence, it may very readily be seen that a definite, fixed normal for every part of the body is impossible to establish. This fact, at times, places the author in a rather awkward position. For instance, a great many slight deviations in outline and contour of the ear are mentioned, each of which is considered a mark
Developmental Pathology. JAMA. 1912;LVIII(19):1470. doi:10.1001/jama.1912.04260050146035
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