Clinical use of primary cortical responses.

This paper reviews the use of the primary cortical responses (or middle components of the auditory-evoked potentials) as it has recently developed in the clinical assessment of auditory disorders. Advances in the use of these techniques since 1958 are examined. Recording parameters for the middle components are briefly reviewed. Information is presented on the frequency-specific nature of the response, as well as normative studies with neonates and infants. The clinical application of the middle components is summarized, as well as information about future directions for improving the clinical utility of electroencephalic response recordings.