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July 4, 1891

THE REMOTE EFFECTS OF FŒTAL BRAIN INJURY IN LABOR; OR, WHY WE ARE RIGHT-HANDED.Read in the Section of Obstetrics and Diseases of Women, at the Forty-second Annual Meeting of the American Medical Association, held at Washington, D. C., May, 1891.

Author Affiliations


JAMA. 1891;XVII(1):19-21. doi:10.1001/jama.1891.02410790033001g

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We are right-handed because of injury of the motor centres of the right side of the fœtal brain in labor. The manner of receiving this injury, and something of its nature, constitute the subject of this paper.

Some may take exceptions to my premises, and assert that the causes which determine the position of the fœtus "at term," are the primary causes of right-handedness. This I decline to discuss. Much might be said concerning the bones, diameters, planes and outlet of the female pelvis, in introducing my subject. All these points I pass over, and pause only to say that the contour of the parts, or the natural structure and relations of the various bones and organs pertaining to the female pelvis, in connection with the physical character of the fœtus, determines in a mechanical way how it shall present at delivery, and the presentation determines what motor centres, if

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