title: Late auditory evoked potentials can occur without brain stem potentials.
abstract: The sequence of early, middle and late auditory evoked potentials is well known. However, it is unknown whether the late (60-250 msec) potentials can occur independently of the early, brain stem potentials. Therefore, in 6 subjects with markedly abnormal or absent brain stem potentials, we recorded two of the late potentials: the vertex potential and the T-complex. The latter is a putative product of auditory cortex. Both of these potentials were clearly evident in all patients in spite of the absence of or marked abnormalities in brain stem potentials.
mesh_terms: D001933:Brain Stem / Q000503:physiopathology*; D004569:Electroencephalography; D005072:Evoked Potentials, Auditory; D006801:Humans