title: The scaling of white matter to gray matter in cerebellum and neocortex.
abstract: It is known that the white matter of neocortex increases disproportionately with brain size. However, relatively few measurements have been made of white matter/gray matter scaling in the cerebellum. We present data on the volumes of white and gray matter in both structures, taken from 45 species of mammals. We find a scaling exponent of 1.13 for cerebellum and 1.28 for neocortex. The 95% confidence intervals for our estimates of these two exponents do not overlap. This difference likely reflects differences in the connectivity and/or micro-structure of white matter in the two regions.
authors.affiliation: Biology Division, California Institute of Technology, MC 216-76, Pasadena, CA 91125, USA. bush@caltech.edu
authors.forename: Eliot C
authors.initials: EC
authors.lastname: Bush
authors.forename: John M
authors.initials: JM
authors.lastname: Allman
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000502:physiology; D002531:Cerebellum / Q000033:anatomy & histology* / Q000502:physiology; D008322:Mammals; D019579:Neocortex / Q000033:anatomy & histology* / Q000502:physiology