Cortical Evoked Response To Acoustic Change Within A Syllable

Ostroff, Jodi M.; Martin, Brett; Boothroyd, Arthur

doi:10.1097/00003446-199808000-00004

Cited by 160 publications

(171 citation statements)

References 20 publications

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“…The most likely contributors to the N 100 -P 200 potentials of this study are the vertex-maximal C-potentials which were found to be associated with both sequential and spectral streaming (e.g., Jones et al, 1998;Jones andPerez, 2001, 2002;Jones, 2003), as well as transition from a periodic to an aperiodic sound (Ostroff et al, 1998;Martin and Boothroyd, 1999). The C-potentials appear to reflect a mismatch of temporal and spectral attributes, or their combination (periodicity) between the incoming acoustic change and the preceding stream.…”

Section: Processes Associated With Potentials To Frequency Changementioning

confidence: 69%

“…The ability to discriminate successive sounds on the basis of frequency is central to the perception of different formants (peak energy bands) of vowels and frequency peaks of consonants (Medwetzky, 2002) and is termed frequency resolution. The N 100 and P 200 have been studied in response to acoustic changes in natural speech associated with phonemes and transitions: fricative to vowel (Ostroff et al, 1998;Friesen and Trembley, 2006), vowel to vowel (Martin and Boothroyd, 2000) and vowel to fricative (Laufer and Pratt, 2003a), and to change in non-speech sounds (Harris et al, 2007(Harris et al, , 2008.…”

Section: Auditory Change Detectionmentioning

confidence: 99%

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Auditory-evoked potentials to frequency increase and decrease of high- and low-frequency tones

Pratt

Starr

Michalewski

et al. 2009

Clinical Neurophysiology

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a b s t r a c tObjective: To define cortical brain responses to large and small frequency changes (increase and decrease) of high-and low-frequency tones. Methods: Event-Related Potentials (ERPs) were recorded in response to a 10% or a 50% frequency increase from 250 or 4000 Hz tones that were approximately 3 s in duration and presented at 500-ms intervals. Frequency increase was followed after 1 s by a decrease back to base frequency. Frequency changes occurred at least 1 s before or after tone onset or offset, respectively. Subjects were not attending to the stimuli. Latency, amplitude and source current density estimates of ERPs were compared across frequency changes. Results: All frequency changes evoked components P 50 , N 100 , and P 200 . N 100 and P 200 had double peaks at bilateral and right temporal sites, respectively. These components were followed by a slow negativity (SN). The constituents of N 100 were predominantly localized to temporo-parietal auditory areas. The potentials and their intracranial distributions were affected by both base frequency (larger potentials to low frequency) and direction of change (larger potentials to increase than decrease), as well as by change magnitude (larger potentials to larger change). The differences between frequency increase and decrease depended on base frequency (smaller difference to high frequency) and were localized to frontal areas. Conclusions: Brain activity varies according to frequency change direction and magnitude as well as base frequency. Significance: The effects of base frequency and direction of change may reflect brain networks involved in more complex processing such as speech that are differentially sensitive to frequency modulations of high (consonant discrimination) and low (vowels and prosody) frequencies.

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Section: Processes Associated With Potentials To Frequency Changementioning

confidence: 69%

Section: Auditory Change Detectionmentioning

confidence: 99%

Auditory-evoked potentials to frequency increase and decrease of high- and low-frequency tones

Pratt

Starr

Michalewski

et al. 2009

Clinical Neurophysiology

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“…Component N 1 ( 100 ms from stimulus onset) and the immediately following P2 of ERPs have been suggested as a means for studying the initial auditory processing of speech signals (Ostroff et al, 1998;Tremblay et al, , 2003. N 1 -P 2 amplitudes have been related to changes in speech perception accompanying aging , sensory-neural hearing loss (Oates et al, 2002), training-related plasticity (Reinke et al, 2003;Tremblay and Kraus, 2002;Tremblay et al, 2001) and performance decrease by noise masking Whiting et al, 1998).…”

Section: N 1 To Speech and Acoustic Temporal Cuesmentioning

confidence: 99%

“…N 1 -P 2 amplitudes have been related to changes in speech perception accompanying aging , sensory-neural hearing loss (Oates et al, 2002), training-related plasticity (Reinke et al, 2003;Tremblay and Kraus, 2002;Tremblay et al, 2001) and performance decrease by noise masking Whiting et al, 1998). The discrimination of temporal cues in speech has been studied with N 1 as a marker of detecting timevarying changes within a signal (Martin and Boothroyd, 1999) as well as the transition from friction noise to the following vowel (Ostroff et al, 1998;Tremblay et al, 2003). The ability of the auditory system to encode temporal cues is critical for many auditory functions including speech perception and localization.…”

Section: N 1 To Speech and Acoustic Temporal Cuesmentioning

confidence: 99%

The N1 complex to gaps in noise: Effects of preceding noise duration and intensity

Pratt

Starr

Michalewski

et al. 2007

Clinical Neurophysiology

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The N1 complex to gaps in noise: Effects of preceding noise duration and intensity AbstractObjective: To study the effects of duration and intensity of noise that precedes gaps in noise on the N-Complex (N 1a and N 1b ) of EventRelated Potentials (ERPs) to the gaps. Methods: ERPs were recorded from 13 normal subjects in response to 20 ms gaps in 2-4.5 s segments of binaural white noise. Within each segment, the gaps appeared after 500, 1500, 2500 or 4000 ms of noise. Noise intensity was either 75, 60 or 45 dBnHL. Analysis included waveform peak measurements and intracranial source current density estimations, as well as statistical assessment of the effects of pre-gap noise duration and intensity on N 1a and N 1b and their estimated intracranial source activity. Results: The N-Complex was detected at about 100 ms under all stimulus conditions. Latencies of N 1a (at 90 ms) and N 1b (at 150 ms) were significantly affected by duration of the preceding noise. Both their amplitudes and the latency of N 1b were affected by the preceding noise intensity. Source current density was most prominent, under all stimulus conditions, in the vicinity of the temporo-parietal junction, with the first peak (N 1a ) lateralized to the left hemisphere and the second peak (N 1b ) -to the right. Additional sources with lower current density were more anterior, with a single peak spanning the duration of the N-Complex. Conclusions: The N 1a and N 1b of the N-Complex of the ERPs to gaps in noise are affected by both duration and intensity of the pre-gap noise. The minimum noise duration required for the appearance of a double-peaked N-Complex is just under 500 ms, depending on noise intensity. N 1a and N 1b of the N-Complex are generated predominantly in opposite temporo-parietal brain areas: N 1a on the left and N 1b on the right. Significance: Duration and intensity interact to define the dual peaked N-Complex, signaling the cessation of an ongoing sound.

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“…The P1-N1-P2 response, also called the acoustic change complex, is a physiological response that signals the neural detection of acoustic change at the level of the auditory cortex and corresponds well with perceptual thresholds for the same acoustic change (Kaukoranta, Hari, & Lounasmaa, 1987;Martin & Boothroyd, 1999;Ostroff, Martin, & Boothroyd, 1998). Therefore, the P1-N1-P2 is particularly well suited for studying a number of acoustic cues important for the perception of speech, including silent gaps.…”

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confidence: 99%

Cortical Evoked Response to Gaps in Noise: Within-Channel and Across-Channel Conditions

2007

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Objectives-The objective of this study was to describe the cortical evoked response to silent gaps in a group of young adults with normal hearing using stimulus conditions identical to those used in psychophysical studies of gap detection. Specifically, we sought to examine the P1-N1-P2 auditory evoked response to the onsets of stimuli (markers) defining a silent gap for withinchannel (spectrally identical markers) and across-channel (spectrally different markers) conditions using four perceptually-equated gap durations. It was hypothesized that (1) P1, N1, and P2 would be present and consistent for 1st marker (before the gap) onsets; (2) for within-channel markers, P1, N1, and P2 would be present for 2nd marker (after the gap) onsets only when the gap was of a duration equal to or larger than the behaviorally measured gap detection threshold; and (3) for the across-channel conditions, P1, N1, and P2 would be present for 2nd marker onsets regardless of gap duration. This is expected due to the additional cue of frequency change following the gap.Design-Twelve young adults (mean age 26 years) with normal hearing participated. Withinchannel and across-channel gap detection thresholds were determined using an adaptive psychophysical procedure. Next, cortical auditory evoked potentials (P1-N1-P2) were recorded with a 32-channel Neuro-scan™ electroencephalogram system using within-channel and acrosschannel markers identical to those used for the psychophysical task and four perceptually weighted gap durations: (1) individual listener's gap detection threshold; (2) above gap detection threshold; (3) below gap detection threshold; and (4) a 1-ms gap identical to the gap in the standard interval of the psychophysical task. P1-N1-P2 peak latencies and amplitudes were analyzed using repeated-measures analyses of variance. A temporal-spatial principal component analysis was also conducted.Results-The latency of P2 and the amplitude of P1, N1, and P2 were significantly affected by the acoustic characteristics of the 2nd marker as well as the duration of the gap. Larger amplitudes and shorter latencies were generally found for the conditions in which the acoustic cues were most salient (e.g., across-channel markers, 1st markers, large gap durations). Interestingly, the temporal-spatial principal component analysis revealed activity elicited by gap durations equal to gap detection threshold in the latency regions of 167 and 183 ms for temporal-parietal and rightfrontal spatial locations.Address for correspondence: Jennifer Lister, Department of Communication Sciences and Disorders, University of South Florida, 4202 E. Fowler Ave. PCD 1017, Tampa, FL 33620. jlister@cas.usf.edu.. HHS Public Access Author Manuscript Author ManuscriptAuthor Manuscript Author ManuscriptConclusions-The cortical response to a silent gap is unique to specific marker characteristics and gap durations among young adults with normal hearing. Specifically, when the onset of the 2nd marker is perceptually salient, the amplitude of the P1-N1-P2 re...

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Cortical Evoked Response To Acoustic Change Within A Syllable

Cited by 160 publications

References 20 publications

Auditory-evoked potentials to frequency increase and decrease of high- and low-frequency tones

Auditory-evoked potentials to frequency increase and decrease of high- and low-frequency tones

The N1 complex to gaps in noise: Effects of preceding noise duration and intensity

Cortical Evoked Response to Gaps in Noise: Within-Channel and Across-Channel Conditions

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