Fig. 1.

Cross-modal reorganization of auditory cortex in a ferret deafened as an adult. (A) The location of the auditory cortex (box) on lateral view of the ferret brain; (B) auditory cortical areas (after 32). (C) An enlarged view of the auditory cortices in an adult-deafened ferret (175 DPN at deafening, 74 d deaf) shows each recording site indicated by the numbered somatosensory receptive field that was mapped at that site (X, unresponsive). All auditory areas tested [corresponding to A1, anterior auditory field (AAF), and portions of anterior dorsal field (ADF) and posterior pseudo-sylvian field (PPF)] were responsive to somatosensory stimulation, primarily on the head. All recordings were made at 1,000 μm depth. (AVF, anterior ventral field; PSF, posterior suprasylvian field.)