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Cushioning of the Body By the Buttocks

Edward A. Edwards, MD
JAMA. 1967;199(1):47. doi:10.1001/jama.1967.03120010091030.
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To the Editor:—  Ashley Montagu's article (198:51, 1966) on the value of the buttock in cushioning the body prompts me to call attention to a special adaptation to pressure in the region over the ischial tuberosities. In studying regional variations in pigments and vascularity (Amer J Anat65:1, 1939), I was struck by the richness of arterial supply limited to that part of the buttocks overlying each tuberosity, and comparable to that of the palms and soles. A moderate epidermalISCHIAL FAT PAD ABDOMINAL PANNICULUS thickening may be seen here in older subjects. The fat over the tuberosities is compacted into fine lobules, separated by much connective tissue, as in the palms and soles. As in those regions, the fat does not tend to shrink in cases of malnutrition.The Figure shows the ability of this special fat pad to withstand pressure. Blocks of fat of approximately equal


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