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Chapter 64 - Birth Trauma

from Trauma

Published online by Cambridge University Press:  07 August 2021

Mirna Lechpammer ,
Marc Del Bigio  and
Rebecca Folkerth
By
Marc Del Bigio
Mirna Lechpammer
Affiliation:
New York University School of Medicine
Marc Del Bigio
Affiliation:
University of Manitoba, Canada
Rebecca Folkerth
Affiliation:
New York University School of Medicine
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Summary

Normal vaginal birth is associated with considerable distortion of the fetal head (1–3). As the head passes through the pelvis, it is subjected to pressures roughly double those in the amniotic cavity (4, 5). Magnetic resonance imaging of term fetuses during labor shows that the frontal and parietal bones shift considerably and the brain itself changes shape, usually becoming taller in the vertex-to-skull base plane (6, 7). Overlap of calvarial bones occurs at the sagittal suture and to a lesser extent the lambdoid suture (8). The occipitofrontal circumference rebounds quickly within 2–3 days and is fully restored 1–2 weeks after delivery (9, 10).

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Perinatal Neuropathology , pp. 411 - 420
Publisher: Cambridge University Press
Print publication year: 2021

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