Research Topics
| T W PictonSummaryAffiliation: University of Toronto Country: Canada Publications
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Detail Information
Publications
Intracerebral sources of human auditory-evoked potentialsT W Picton
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Canada
Audiol Neurootol 4:64-79. 1999..The analyses also suggested the possibility of additional sources in the frontal lobes...- Multiple auditory steady-state responsesTerence W Picton
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Canada
Ann Otol Rhinol Laryngol Suppl 189:16-21. 2002..Responses to amplitude and frequency modulation may also become helpful in assessing suprathreshold auditory processes, such as those necessary for speech perception... - Human auditory steady-state responsesTerence W Picton
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Canada
Int J Audiol 42:177-219. 2003..These responses are useful for objectively evaluating auditory thresholds, assessing suprathreshold hearing, and monitoring the state of arousal during anesthesia... - Human auditory steady-state responses to changes in interaural correlationHilmi R Dajani
Rotman Research Institute at Baycrest and University of Toronto, 3560 Bathurst Street, Toronto, Ont, Canada M6A 2E1
Hear Res 219:85-100. 2006..31). This steady-state response may prove useful in the objective investigation of binaural hearing... - Scalp topography and intracerebral sources for ERPs recorded during auditory target detectionAntoine J Shahin
Center for Mind and Brain, University of California Davis, Davis, CA, USA
Brain Topogr 19:89-105. 2006..Perceptual discrimination is related to interactions between the frontal and temporal regions, stimulus-response association occurs in the temporo-parietal regions and post-perceptual processing in the right temporo-parietal region... - Mismatch negativity: different water in the same riverT W Picton
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Canada
Audiol Neurootol 5:111-39. 2000..Improvements in the techniques for measuring the MMN and in the paradigms for eliciting it will be needed before the MMN can become clinically useful as an objective measurement of such disorders in individual patients... - Guidelines for using human event-related potentials to study cognition: recording standards and publication criteriaT W Picton
Rotman Research Institute, Baycrest Centre for Geriatric Care, Toronto, Ontario, Canada
Psychophysiology 37:127-52. 2000..The data must then be analyzed and presented in a way that allows different studies to be compared readily. This paper presents guidelines for recording ERPs and criteria for publishing the results... - The correction of ocular artifacts: a topographic perspectiveT W Picton
Rotman Research Institute, University of Toronto, Ontario, Canada
Clin Neurophysiol 111:53-65. 2000..To evaluate the scalp topography of the potentials related to saccades and blinks... - Cortical oscillations modulated by congruent and incongruent audiovisual stimuliA T Herdman
The Rotman Research Inst, Baycrest Centre for Geriatric Care, University of Toronto, Toronto, Canada
Neurol Clin Neurophysiol 2004:15. 2004..Results from this study further support the concept of interactions between the auditory and visual sensory cortices in multi-sensory processing of audiovisual objects... - The use of phase in the detection of auditory steady-state responsesT W Picton
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, 3560 Bathurst Street, Toronto, Ontario, Canada M6A 2E1
Clin Neurophysiol 112:1698-711. 2001..To investigate how phase measurements might facilitate the detection of auditory steady-state responses... - Weighted averaging of steady-state responsesM S John
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, 3560 Bathurst Street, Ontario, M6A 2E1, Toronto, Canada
Clin Neurophysiol 112:555-62. 2001..Weighted averaging underestimated the amplitude of the responses by about 2%. CONCLUSION: Weighted averaging should be used instead of normal averaging for detecting steady-state responses... - Detection of power changes between conditions using split-half resampling of synthetic aperture magnetometry dataW Chau
The Rotman Research Institute of Baycrest Centre, University of Toronto, Toronto, Canada
Neurol Clin Neurophysiol 2004:24. 2004..The method of split-half resampling should therefore be useful for localizing significant differences in brain activity between conditions within individual subjects... - Correlates of eye blinking as determined by synthetic aperture magnetometryT Bardouille
The Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Ont, Canada M6A 2E1
Clin Neurophysiol 117:952-8. 2006..To evaluate the spatiotemporal characteristics of ocular and cerebral current sources during voluntary eyeblinking... 
Attention modulates beta oscillations during prolonged tactile stimulationT Bardouille
Rotman Research Institute, Baycrest Centre, University of Toronto, 3560 Bathurst Street, Toronto, ON M6A2E1, Canada
Eur J Neurosci 31:761-9. 2010..Modulation of neural activity in such a large sensorimotor network indicates a role for beta activity in higher-order processing...- Bottom-up and top-down influences on auditory scene analysis: evidence from event-related brain potentialsC Alain
Rotman Research Institute, Baycrest Centre for Geriatric Care, Toronto, Ontario, Canada
J Exp Psychol Hum Percept Perform 27:1072-89. 2001..Brain electrical source analyses showed that distinguishing simultaneous auditory objects involved a widely distributed neural network that included auditory cortices, the medial temporal lobe, and posterior association cortices... - Multiple auditory steady-state responses to AM and FM stimuliM S John
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Canada
Audiol Neurootol 6:12-27. 2001..Since AM responses generally occur with a slightly later phase delay than FM responses, the largest MM response is recorded when the maximum frequency of the MM stimulus occurs just after the maximum amplitude... - Human auditory steady-state responses to tones independently modulated in both frequency and amplitudeA Dimitrijevic
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Canada
Ear Hear 22:100-11. 2001..IAFM stimuli therefore show promise as an objective test for assessing suprathreshold hearing... - MASTER: a Windows program for recording multiple auditory steady-state responsesM S John
Rotman Research Institute, Baycrest Centre for Geriatric Care, Toronto, Canada
Comput Methods Programs Biomed 61:125-50. 2000..The instrument uses a popular programming language (LabVIEW) and a commercial data acquisition board (AT-MIO-16E-10), both of which are available from National Instruments... - The effect of attention on the auditory steady-state responseB Ross
The Rotman Research Institute, Baycrest Centre for Geriatric Care, Toronto, ON, Canada
Neurol Clin Neurophysiol 2004:22. 2004..In contrast, transient gamma-band and N1 responses were not affected by the different states of attention... - Efficient stimuli for evoking auditory steady-state responsesM S John
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Canada
Ear Hear 24:406-23. 2003..To compare the magnitudes of the steady-state responses evoked by several types of stimuli, and the times required to recognize these responses as significant... - Human auditory steady-state responses: the effects of recording technique and state of arousalTerence W Picton
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Toronto, Canada
Anesth Analg 97:1396-402. 2003..These responses can be quickly and reliably recorded during both sleep and wakefulness, provided that appropriate averaging techniques are used... - Physiological detection of interaural phase differencesBernhard Ross
Rotman Research Institute, Baycrest Center and University of Toronto, Toronto, M6A 2E1, Canada
J Acoust Soc Am 121:1017-27. 2007..The procedure has potential applications in investigating impaired binaural processing because phase statistic applied to single epoch MEG data allowed individual thresholds to be obtained... - Human temporal auditory acuity as assessed by envelope following responsesDavid W Purcell
The Rotman Research Institute, Baycrest Centre for Geriatric Care, Toronto, Ontario M6A 2E1, Canada
J Acoust Soc Am 116:3581-93. 2004..72). The EFR techniques investigated here might be developed into a clinically useful objective estimate of temporal auditory acuity for subjects who cannot provide reliable behavioral responses... - Advantages and caveats when recording steady-state responses to multiple simultaneous stimuliM Sasha John
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Ontario
J Am Acad Audiol 13:246-59. 2002..Although these interactions are interesting physiologically, their small size means that they do not lessen the advantages of the multiple-stimulus approach... - Concurrent measurement of distortion product otoacoustic emissions and auditory steady state evoked potentialsDavid W Purcell
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, 3560 Bathurst Street, Toronto, ON, Canada M6A 2E1
Hear Res 176:128-41. 2003..3 and 9.6 ms at 180 Hz. From a model of the mechanical transmission in the cochlea, delays between the basilar membrane and the generator of the ASSR were estimated as 15.4, 12.2 and 15.3 ms at 85 Hz and 8.6, 7.6 and 8.0 ms at 180 Hz... - Envelope following responses to natural vowelsSteven J Aiken
Rotman Research Institute, Baycrest Centre for Geriatric Care and University of Toronto, Toronto, Canada
Audiol Neurootol 11:213-32. 2006..These results support the use of a Fourier analyzer to measure envelope following responses to natural speech... - Age-related changes in transient and oscillatory brain responses to auditory stimulation in healthy adults 19-45 years oldCatherine Poulsen
Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, 3801 University Street, Montreal, Canada
Cereb Cortex 17:1454-67. 2007..These results indicate persistent adaptation of cortical auditory processes into middle adulthood. We speculate that experience-driven myelination and/or refinement of inhibitory circuits may underlie these changes... - Enhanced anterior-temporal processing for complex tones in musiciansAntoine J Shahin
Rotman Research Institute of Baycrest, Toronto, Ont, Canada
Clin Neurophysiol 118:209-20. 2007..To examine how auditory brain responses change with increased spectral complexity of sounds in musicians and non-musicians... - Human auditory steady-state responses during sweeps of intensityTerence W Picton
Rotman Research Institute at Baycrest Centre for Geriatric Care, University of Toronto, Canada
Ear Hear 28:542-57. 2007..To record steady-state responses to amplitude-modulated tones that change their intensity over time and to see how well behavioral thresholds can be estimated from such responses... - Cortical responses to the 2f1-f2 combination tone measured indirectly using magnetoencephalographyDavid W Purcell
Rotman Research Institute at Baycrest, Toronto, Ontario, Canada
J Acoust Soc Am 122:992-1003. 2007..The perceived magnitude of the combination tone is not determined by the measured physiological response at either the cochlea or the cortex... - Aging in binaural hearing begins in mid-life: evidence from cortical auditory-evoked responses to changes in interaural phaseBernhard Ross
Rotman Research Institute, Baycrest Centre, and University of Toronto, Toronto, Ontario, Canada M6A 2E1
J Neurosci 27:11172-8. 2007..This study provides evidence from human physiological data for the early onset of biological aging in binaural hearing... - Attenuation of the 40-hertz auditory steady state response by propofol involves the cortical and subcortical generatorsGilles Plourde
Department of Anesthesia, McGill University, Montreal, Quebec, Canada
Anesthesiology 108:233-42. 2008..They also examined the effect of propofol on two auditory evoked potentials of cortical origin: the N1 and the sustained potential... - Estimating the audiogram using multiple auditory steady-state responsesAndrew Dimitrijevic
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Ontario
J Am Acad Audiol 13:205-24. 2002..These responses were attenuated by white noise presented concurrently through the bone conductor... - Cortical oscillations related to processing congruent and incongruent grapheme-phoneme pairsAnthony T Herdman
The Rotman Research Institute at Baycrest Centre, 3560 Bathurst Street, Toronto, Ont, Canada M6A 2E1
Neurosci Lett 399:61-6. 2006..These results indicate that congruent visual input can modify cortical activity in the left auditory cortex... - Intracerebral sources of human auditory steady-state responsesAnthony T Herdman
School of Audiology and Speech Sciences, University of British Columbia, Vancouver, BC, Canada
Brain Topogr 15:69-86. 2002..These results suggest that the whole auditory nervous system is activated by modulated tones, with the cortex being more sensitive to slower modulation frequencies... - Frequency specificity of 40-Hz auditory steady-state responsesBernhard Ross
Institute of Biomagnetism and Biosignalanalysis, University Hospital, Kardinal von Galen Ring 10, 48129 Munster, Germany
Hear Res 186:57-68. 2003.... - Effects of brief discrimination-training on the auditory N1 waveElvira Brattico
Cognitive Brain Research Unit, Department of Psychology, PL 9, 00014 University of Helsinki, Finland
Neuroreport 14:2489-92. 2003..After training N1 s were attenuated to all tones except the trained and repeated ones, indicating a refractory frequency effect, long-term habituation, and sensitization to the repeated and trained tones... - Avoiding electromagnetic artifacts when recording auditory steady-state responsesTerence W Picton
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Canada
J Am Acad Audiol 15:541-54. 2004..Alternating SAM tones evoke responses similar to conventional SAM tones, whereas beats produce significantly smaller responses... - Place specificity of multiple auditory steady-state responsesAnthony T Herdman
School of Audiology and Speech Sciences, The University of British Columbia, Vancouver, Canada
J Acoust Soc Am 112:1569-82. 2002..Results indicate that ASSRs to moderately intense stimuli (60 dB SPL) reflect activation of reasonably narrow cochlear regions, regardless of presenting AM tones simultaneously or separately... - Estimating audiometric thresholds using auditory steady-state responsesTerence W Picton
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Canada
J Am Acad Audiol 16:140-56. 2005..After 9.8 minutes of recording, the average ASSR thresholds (and standard deviations) were 12.6 +/- 8.7 in the normal subjects, 12.4 +/- 11.9 dB in the normal elderly, and 3.6 +/- 13.5 dB SL in the hearing-impaired subjects... - EEG spectral dynamics during discrimination of auditory and visual targetsAli Mazaheri
Rotman Research Institute, Baycrest Centre for Geriatric Care, 3560 Bathurst Street, Toronto, Canada M6A 2E1
Brain Res Cogn Brain Res 24:81-96. 2005..The idea that the ERPs and the EEG rhythms "share generators" can explain these findings... - Recording auditory steady-state responses in young infantsM Sasha John
Rotman Research Institute, Baycrest Centre for Geriatric Care, University of Toronto, Toronto, Canada
Ear Hear 25:539-53. 2004..Our hypothesis was that MM and AM2 tonal stimuli would evoke larger responses than either the AM or FM tones, and that this increased size would make the responses more readily detectable... - Temporal integration in the human auditory cortex as represented by the development of the steady-state magnetic fieldBernhard Ross
Institute of Experimental Audiology, Munster University Hospital, Germany
Hear Res 165:68-84. 2002..At stimulus offset the SSR ceased within 50 ms. These results indicate that the primary auditory cortex responds immediately to stimulus changes and integrates stimulus features over a period of about 200 ms... - Recording human evoked potentials that follow the pitch contour of a natural vowelHilmi R Dajani
Institute of Biomaterials and Biomedical Engineering and the Edward S Rogers Sr Department of Electrical and Computer Engineering, University of Toronto, Toronto, Canada
IEEE Trans Biomed Eng 52:1614-8. 2005..These findings suggest that the measurement of pitch-evoked responses may be a viable tool for objective speech audiometry... - Keeping time: effects of focal frontal lesionsTerence W Picton
The Rotman Research Institute, Baycrest Centre for Geriatric Care, 3560 Bathurst Street, Toronto, Ont, Canada M6A 2E1
Neuropsychologia 44:1195-209. 2006..In contrast, the superior medial regions of the frontal lobe are necessary to maintain consistent timing performance over prolonged periods of time... - Simultaneous latency estimations for distortion product otoacoustic emissions and envelope following responsesDavid W Purcell
The Rotman Research Institute, Baycrest Centre for Geriatric Care, Toronto, Ontario, Canada
J Acoust Soc Am 119:2869-80. 2006..The EFR apparent latency is the sum of inward cochlear delay and neural processing delay. Neural delay was estimated as approximately 5.3 ms for both frequencies of stimulation...