Mechanically and electrically evoked somatosensory potentials in humans: Scalp and neck distributions of short latency components

Pratt, Hillel; Starr, Arnold

doi:10.1016/0013-4694(81)90002-x

Cited by 44 publications

(8 citation statements)

References 10 publications

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“…This is consistent with a somatosensory source for the P 34 peak (7). This result is also consistent with the reports of mechanically elicited evoked potentials for the digits (17,22,28). This early positive activity in response to cutaneous mechanical stimulation has been suggested to be generated in the SI cortex (12).…”

Section: Expiratory Occlusion Rrepsupporting

confidence: 92%

“…This pattern was identified in electrodes placed over the somatosensory region in response to occlusions presented either at the onset of inspiration or midinspiration. The RREP waveform was very similar to that previously reported for mechanically elicited somatosensory-evoked potentials in the limbs (9,22,28,31). The initial positive peak of the RREP waveform, P 1 , was hypothesized to be due to the dipole that occurred when a cerebral cortical column was depolarized by the arrival of afferent activity at the somatosensory cortex.…”

supporting

confidence: 81%

“…In the case of short-latency sensory components, the regional distribution acts as an indication of the activity of specialized areas of underlying cortical tissue. In past studies of mechanically and electrically stimulated somatosensory event-related potentials, multichannel topographies have indicated maximal responses occur over tissue contralateral to the side of stimulation (10,17,19,22,28,29,31). Expiratory occlusion is a stimulus, like inspiratory occlusion, that acts on the entire respiratory apparatus.…”

Section: Expiratory Occlusion Rrepmentioning

confidence: 99%

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Respiratory-related evoked potential elicited by expiratory occlusion

Hammond

Gaeta

Davenport

1999

Journal of Applied Physiology

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Respiratory-related evoked potentials (RREPs) have been elicited by inspiratory loads in adults and children. The RREP was recorded over the somatosensory region of the cerebral cortex. It was hypothesized that a RREP could be recorded by using expiratory occlusion. Electroencephalographic activity was recorded in adults from 14 scalp locations, referenced to the linked earlobes. The occlusion was presented as an interruption of expiration. Epochs of electroencephalographic activity and mouth pressure were recorded for each expiratory occlusion presentation. There were two occlusion trials and a control trial of 100 presentations each. The epochs in each trial were averaged and examined for the presence of short-latency, occlusion-related peaks. RREP peaks were observed bilaterally with expiratory occlusion and were absent in control unoccluded averages. A positive peak, P(34), was observed at central and postcentral sites. A negative peak, N(53), was observed at frontal and central sites. A second positive peak, P(95), was observed at frontal and central sites. These results demonstrate that expiratory occlusion elicits a RREP. This suggests that expiratory occlusion-related sensory information activates the cerebral cortex similar to that for inspiratory loads.

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Section: Expiratory Occlusion Rrepsupporting

confidence: 92%

supporting

confidence: 81%

Section: Expiratory Occlusion Rrepmentioning

confidence: 99%

See 1 more Smart Citation

Respiratory-related evoked potential elicited by expiratory occlusion

Hammond

Gaeta

Davenport

1999

Journal of Applied Physiology

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“…As in our study, several studies have reported that somatic mechanically evoked CEPs are less reliable that electrically evoked CEPs. 28,31 In conclusion, we have directly compared the reliability of both electrical and mechanical rectal stimulation for recording CEPs for the ®rst time and demonstrated that electrical rectal stimulation results in more reliable, larger amplitude CEPs than mechanical stimulation. The similarities in morphology and interpeak latencies suggest that MRS and ERS are activating a similar cortical neuronal network.…”

Section: Discussionmentioning

confidence: 85%

“…As in our study, several studies have reported that somatic mechanically evoked CEPs are less reliable that electrically evoked CEPs 28 . 31 …”

Section: Discussionmentioning

confidence: 99%

Comparison of cortical potentials evoked by mechanical and electrical stimulation of the rectum

Hobday

Hobson

Furlong

et al. 2000

Neurogastroenterology Motil

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Patients with irritable bowel syndrome have heightened perception of gut sensation. The mechanisms responsible for this remain unknown, due to current poor knowledge of the central processing of gut sensation. Cortical evoked potentials (CEPs) have been recorded following both electrical rectal stimulation (ERS) and mechanical rectal stimulation (MRS). Because of the lack of a direct comparison of these two methods, their robustness for future clinical use remains unknown. The aim of our study was to compare the characteristics of CEPs following ERS and MRS. CEPs were recorded from the vertex in 14 healthy volunteers following ERS with bipolar ring electrodes, and MRS by repeated rectal distension. CEPs were recorded in all subjects following electrical stimulation, but only in 11 subjects following mechanical stimulation. In comparison with electrical stimulation, mechanical stimulation produced CEPs with a smaller amplitude and longer latency. However, the morphology of CEPs following electrical and mechanical rectal stimulation was similar, with no difference in the interpeak latencies. In conclusion, we have demonstrated that electrical rectal stimulation is a more reliable stimulus for recording CEPs. The similarity of the morphology and interpeak latencies of the CEPs suggests that both stimuli are activating a similar network of cortical neurones.

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