Illustrated Encyclopedia of Human Anatomic Variation: Opus V: Skeletal Systems
Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD
Peer Review Status: Internally Peer Reviewed
These three sacra are interesting because they show variable absence of the dorsal arches. In addition, it has been noted earlier that in the female the sacrum is broader and less curved compared to the males whose sacrum is usually narrower and more curved. Paradoxically here, the broadest sacrum is the most curved and the narrowest least curved. The sex of the individuals from which these specimens were obtained is unknown.
Dissecting room specimen, The University of Iowa College of Medicine.
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