Spontaneous changes in the morphology of the human short-latency somatosensory evoked response: an interpretation in terms of two superimposed waveform components.
Spontaneous changes, with a time scale of hours or sometimes days, in the morphology of the short-latency somatosensory evoked response in comatose head injury patients were analyzed by a computer processing based on the proposition that the early cortical response consists of a superposition of two waveform complexes. These complexes were deduced to have similar triphasic forms, but one of them was delayed. The amplitude fluctuations of this delayed component caused the changes in the morphology of the response.
D001930:Brain Injuries / Q000503:physiopathology*; D005073:Evoked Potentials, Somatosensory; D006801:Humans