Hilton Stowell

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Significant amplitude and temporal augmentation occurred in later time segments of human somatosensory evoked responses (60-700 ms) when percutaneous electrical pulse stimulation, delivered to finger, toe, or lip, indicated subjectively both crossing of a perceptual pain threshold and somatotopic movement associated with a noxious, qualitative change.(More)
Since 1960 systematic studies of the human scalp-conducted cerebral slow-wave response to painful stimulation have shown only amplitude augmentation of the vertex components of the somatosensory evoked potential (SEP) to be indicators of subjective perception of a noxious or aversive quality in the stimulus. The vertex potential (VP) of the SEP occurs(More)
Human somatosensory evoked potentials (SEP), especially those evoked by electrical stimulation of toothpulp and teeth or by laser thermal stimulation of skin, have attracted biomedical attention since 1975 as possible indicators of the quantity of acute pain being perceived by the subject. The dental variety has been claimed as an "objective correlate of(More)
Scalp-recorded somatosensory evoked potentials (SEPs) in humans and dogs suggest that it takes longer for peripheral information to reach the brain from the anogenital perineum than from the distal hind limbs, in spite of a shorter afferent pathway. The delay seems to be centrally determined, rostral to the lumbar segments, rather than by slower conduction(More)
Some studies of scalp-conducted human EEG show a positive correlation between the temporal coherence of prestimulus activity in the theta, alpha, and beta passbands, on the one hand, and both target probability and subjective self-report about good performance, on the other. There remains an important ambiguity in these data: Are these changes in temporal(More)
Neural network modeling is approaching a strange attractor. Mathematical demonstrations of the theoretical behavior of non-Lipschitzian dynamical systems claim to show how such self-developing computational networks may be fully deterministic as to their microstructure yet without any prescription of their final state in advance. Justification for these(More)