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
  • International journal of psychophysiology…
  • 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
  • The International journal of neuroscience
  • 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
  • The International journal of neuroscience
  • 1987
Cerebral compound field potentials, observed as either the electroencephalogram (EEG) or stimulus-synchronized event related brain potentials (ERBP), have received thirty years of experimental study as possible indicators of general brain state or of sensorimotor information processing respectively. They have received relatively little attention in the(More)
  • H Stowell
  • The International journal of neuroscience
  • 1985
The so-called Vertex Potential (VP) of human scalp-conducted and event related brain potential (ERBP), which occur as a slow and often large, biphasic sinusoid within the 100-400 msec time segment after transient stimulation in the three main sensory modalities, are the longest researched of all human evoked potential (EP) phenomena. Its variable amplitude(More)
  • H Stowell
  • The International journal of neuroscience
  • 1987
A neurosurgical study of the human somatosensory evoked potential suggested, over 13 years ago, that the early fast waveform recorded by averaging on SI cortex in response to electrical stimulation of the skin is insufficient for a conscious report of tactile sensation. The same study also implied that the succeeding slower waveform, showing consistent(More)
  • H Stowell
  • The International journal of neuroscience
  • 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)