Schematic of auditory cortex in the ferret, showing organization of visual inputs. Auditory cortical areas are located on the anterior, middle and posterior ectosylvian gyri (AEG, MEG and PEG). Other abbreviations: PPc, caudal posterior parietal cortex; SSY, suprasylvian cortex; V1, primary visual cortex; V2, secondary visual cortex; sss, suprasylvian sulcus; pss, pseudosylvian sulcus; D, dorsal; R, rostral.