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)
  • H Stowell
  • 1984
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)
Primary somatosensory evoked responses to tapping and pinprick of contralateral central palmar skin, recorded from human scalp, yielded significant differences of peak latency but not of amplitude, suggesting afferent conduction by two populations of primary fibers, Group II and Group III respectively. Pinprick first positives were always later for all(More)
  • H Stowell
  • 1984
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)
  • H Stowell
  • 1984
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)
  • H Stowell
  • 1987
The trajectories of data and modelling from formerly divergent research efforts now seem to be converging to an unexpected region of the phase space of neuroscience. Computational network theory and simulation assume that temporal rhythm may be a significant parameter for the successful organization of nonlinear analog computation effected by hierarchical(More)
  • H Stowell
  • 1985
An evoked potential report by four authors has revived the question of the somatosensory specificity of the vertex potential of somatosensory evoked potentials, when these are derived by scalp conductance in response to subjectively painful skin stimulation. By a peripheral nerve-block maneuver combined with subjective sensoriperceptual reports, the authors(More)
  • H Stowell
  • 1990
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)