A test of the ArchaicIntrogression Hypothesis for the Chiari malformation type I.
Plomp Kimberly, Lewis Daniel, Buck Laura, +4 more·Evolution, medicine, and public health
The Chiari malformation type I (CM-I) is a herniation of the cerebellum through the foramen magnum. Its proximate cause is accepted to be an unusually small occipital bone. However, its ultimate cause remains unclear. In 2013, Fernandes and colleagues hypothesized that individuals develop CM-I because some of their cra…