Auditory cortex in the grey squirrel: tonotopic organization and architectonic fields

The representation of sound frequency within auditory cortex has been investigated with microelectrode mapping techniques in grey squirrels. The cyto- and myeloarchitecture of mapped cortical surfaces was examined and related to recording data. Among the results were the following: (1) A primary field can be defined on the basis of both physiological and anatomical criteria.