Abstract
The subcomponents of the cervical evoked response, .**GRAPHIC**. .**GRAPHIC**. .**GRAPHIC**. and the following positivity, were studied in 13 patients with full arrest of the intracerebral circulation, isoelectric EEG and abolished cortical somatosensory evoked responses. The peak negativity .**GRAPHIC**. and the following positive wave were present in all patients. Also .**GRAPHIC**. and .**GRAPHIC**. could be identified in most patients either at standard stimulation frequency (2 Hz) or by increasing the stimulation rate. The results point to a spinal origin of these sub-components in the human cervical evoked response.