Research Topics
| K B CampbellSummaryAffiliation: University of Ottawa Country: Canada Publications
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Detail Information
Publications
Information processing during sleep onset and sleepK B Campbell
University of Ottawa, USA
Can J Exp Psychol 54:209-29. 2000..Some are associated with a preconscious detection while others are associated with conscious awareness. Other evoked potentials may be unique to sleep...
The extent of processing of near-hearing threshold stimuli during natural sleepKenneth Campbell
School of Psychology, University of Ottawa, Canada
Sleep 34:1243-9. 2011..Sleep normally occurs in much less noisy environments. The present study therefore employed ERPs to examine the extent of processing of very low intensity (near-hearing threshold) stimuli...
The effects of attention and conscious state on the detection of gaps in long duration auditory stimuliKenneth Campbell
School of Psychology, University of Ottawa, Ottawa, ON, Canada K1N 6N5
Clin Neurophysiol 122:738-47. 2011..To determine the extent to which the detection of a gap occurring in a long duration stimulus is affected by attention and conscious state...- Event-related potentials as a measure of sleep disturbance: a tutorial reviewKenneth Campbell
School of Psychology, University of Ottawa, Ottawa, ON, K1N 6N5, Canada
Noise Health 12:137-53. 2010..ERP studies will need to employ procedures that have greater ecological generalization; stimulus intensity needs to be lower, less abrupt, with much longer durations, and importantly, stimuli should be presented much less often... - The extent of active processing of a long-duration stimulus modulates the scalp-recorded sustained potentialKenneth Campbell
School of Psychology, University of Ottawa, Ottawa, Canada K1N 6N5
Brain Cogn 69:170-5. 2009..The morphology of the scalp-recorded SP was, nevertheless, much modified by an overlapping and summating CNV, depending on the extent to which active processing of the long-duration stimulus was required... - Event-related potential measures of the inhibition of information processing: II. The sleep onset periodKenneth B Campbell
School of Psychology, University of Ottawa, Ottawa, Canada K1N 6N5
Int J Psychophysiol 46:197-214. 2002..It is unique to the sleep onset and sleep periods, becoming very large during stage 1-theta or when the subject no longer shows signs of awareness of the external stimulus... - The influence of strongly focused visual attention on the detection of change in an auditory patternLauren D Sculthorpe
School of Psychology, University of Ottawa, Ontario, Canada K1N 6N5
Brain Res 1234:78-86. 2008..This finding suggests that the MMN elicited by the violation of a pattern is not affected by the presumed attentional demands of a difficult continuous task such as multiple object tracking... - The intensity of masking noise affects the mismatch negativity to speech sounds in human subjectsA Muller-Gass
School of Psychology, University of Ottawa, Ontario K1N 6N5, Ottawa, Canada
Neurosci Lett 299:197-200. 2001..Behavioral responses were in accordance with the MMN data. Hit rates decreased as audibility decreased. These results suggest that both pre-attentive and attentive speech discrimination deteriorate following a reduction in audibility... - The mismatch negativity during natural sleep: intensity deviantsD H Loewy
Department of Psychology, University of Ottawa, Ottawa, Canada
Clin Neurophysiol 111:863-72. 2000..The decrement deviants elicited a small amplitude, but statistically non-significant, MMN-like wave during both wakefulness and in REM sleep. A MMN-like wave was absent in stage 2 sleep... - Individual differences in mismatch negativity measures of involuntary attention shiftT Sasaki
School of Psychology, University of Ottawa, K1N 6N5, Ottawa, Canada
Clin Neurophysiol 111:1553-60. 2000..Event-related potentials were recorded to standard and deviant stimuli. These were presented either rapidly or slowly. Stimuli that are presented slowly may intrude into consciousness... - MMN elicitation during natural sleep to violations of an auditory patternLauren D Sculthorpe
School of Psychology, University of Ottawa, Ontario, Canada K1N 6N5
Brain Res 1290:52-62. 2009..The MMN was not apparent in either the 6 or 1 semitone condition during NREM sleep. These results confirm the operation of the MMN in REM sleep, and support the view that the MMN operates at a pre-conscious level of processing... - "...and were instructed to read a self-selected book while ignoring the auditory stimuli": the effects of task demands on the mismatch negativityAlexandra Muller-Gass
School of Psychology, University of Ottawa, 145 Jean Jacques Lussier St, Ottawa, Ont, Canada K1N 6N5
Clin Neurophysiol 116:2142-52. 2005..This study examines the effect of variations in the classical reading paradigm on the MMN... - The effect of visual task difficulty and attentional direction on the detection of acoustic change as indexed by the Mismatch NegativityAlexandra Muller-Gass
School of Psychology, University of Ottawa, Ontario, Canada K1N 6N5
Brain Res 1078:112-30. 2006..As such, small acoustic changes would benefit from attention whereas the discriminability of larger changes may not be significantly enhanced... - Effects of sleep onset on the mismatch negativity (MMN) to frequency deviants using a rapid rate of presentationMerav Sabri
School of Psychology, University of Ottawa, Ottawa, Canada
Brain Res Cogn Brain Res 17:164-76. 2003..It is more likely that cortical encoding of both the standard and deviant is weakened during sleep onset because of prior thalamic inhibition of sensory input... - Changes in the scalp topography of event-related potentials and behavioral responses during the sleep onset periodKimberly A Cote
School of Psychology, University of Ottawa, Ontario, Canada
Psychophysiology 39:29-37. 2002..Although mean RT latency varied by 512 ms from bin 1 to bin 3, P300 latency varied by only 25 ms. Differences in RT are thus probably due to response-related processes rather than stimulus classification time... - Effects of sequential and temporal probability of deviant occurrence on mismatch negativityM Sabri
School of Psychology, University of Ottawa, Ottawa, Canada K1N 6N5
Brain Res Cogn Brain Res 12:171-80. 2001..However, it was attenuated when the probability of deviant occurrence was very high perhaps due to the refractoriness of its generator. At the slowest rate, the MMN was diminished perhaps due to memory decay for the standard stimuli... - Event-related potentials reveal the effects of altering personal identityMichel Girodo
School of Psychology, University of Ottawa, 145 Jean-Jacques Lussier St. Ottawa, Ontario, Canada
Neuroreport 13:1595-8. 2002..In this case, one's own true identity only begins to lose its relevance after time, and enacting the false identity then increases the positivity to this new identity... - The effects of digital filtering on mismatch negativity in wakefulness and slow-wave sleepMerav Sabri
School of Psychology, University of Ottawa, Ottawa, Canada
J Sleep Res 11:123-7. 2002..A high-pass setting of 3 Hz provides a reasonable compromise. It has only a slight effect on the MMN when the subject is conscious, but still attenuates most of the unwanted slow potential activity when the subject enters SWS... - Total sleep deprivation and novelty processing: implications for frontal lobe functioningAnik Gosselin
School of Psychology, University of Ottawa, 145 Jean-Jacques-Lussier, Ottawa, Ont, Canada K1N 6N5
Clin Neurophysiol 116:211-22. 2005..SIGNIFICANCE: This study suggests that TSD may compromise cognitive functioning in different regions of the brain. The detection of novelty, probably mediated by the frontal lobes, is particularly at risk... - The use of evoked potentials in sleep researchIan M Colrain
Human Sleep Research Program, Stanford Research Institute, 333 Ravenswood Ave, Menlo Park, CA 94025, USA
Sleep Med Rev 11:277-93. 2007.... - Dynamic left ventricular elastance: a model for integrating cardiac muscle contraction into ventricular pressure-volume relationshipsKenneth B Campbell
Dept VCAPP, Washington State Univ, Pullman, WA 99164 6520, USA
J Appl Physiol 104:958-75. 2008..The model successfully reproduced all major features of the measured DeltaP(t) responses, and thus serves as a credible indicator of the role of underlying contractile processes in LV function... - Is the failure to detect stimulus deviance during sleep due to a rapid fading of sensory memory or a degradation of stimulus encoding?Merav Sabri
Department of Neurology, Medical College of Wisconsin, Milwaukee, WI 53226 3548, USA
J Sleep Res 14:113-22. 2005..A rapid rate of presentation, therefore, does not preserve the MMN following small deviance within sleep. It is possible that inhibition of sensory input occurs before entry into the MMN generating system in the temporal cortex...