The Relationship between Diet and Porous Cranial Lesions in the Southwest United States: A Review

Bioarchaeologists commonly record porous cranial lesions (PCLs). They have varied etiologies but are frequently associated with nutritional anemia without a differential diagnosis. This article provides a literature review, evaluates diet in the US Southwest over time, and identifies issues with associating PCLs with poor diet in this region. Generally, diet was adequate across time and space. Although maize was a dietary staple, other food items such as rabbits and amaranth provided complementary micronutrients. PCLs exhibit varied morphologies, which generally correspond with age: those characterized by fine, scattered porosity are associated with younger ages at death. Variation in PCL morphology indicates different and sometimes unrelated etiologies. Nutritional anemia is an insufficient explanation for PCL frequency in the Southwest, partly because the diet was adequate across time.