[Three case histories of cortical and sub-cortical auditory lesions. Audiological and tomodensimetrical...

The authors describe three case histories of auditory lesions involving the cortex or subcortex of the temporal lobes. In two of the cases there are minor lesions of the hemisphere producing an amusia without verbal deafness or agnosia of non-verbal sounds. In one of the two patients, the total transitory deafness makes the use of the term cortical deafness debatable. In the third case, a bilateral vascular lesion of the temporal lobes had produced a pure verbal deafness without loss of tone discrimination or loss of the capacity to recognise changes in rhythm or sound frequency. In these three patients in whom there was no anatomical verification, the data given by the scanner and the study of evoked cortical potentials recorded over the two cerebral hemispheres allowed a fairly good study of the correlations between the topography of the lesions and their semiotic consequences.