201
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Lai Y, Tian Y, Yao D. MMN evidence for asymmetry in detection of IOI shortening and lengthening at behavioral indifference tempo. Brain Res 2010; 1367:170-80. [PMID: 21029729 DOI: 10.1016/j.brainres.2010.10.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Revised: 10/09/2010] [Accepted: 10/12/2010] [Indexed: 11/17/2022]
Abstract
Most behavioral investigations indicated an indifference interval of 500-700 ms, at which the detection of inter-onset interval (IOI) shortening and lengthening are equally difficult and no perceptual bias would be expected. However, some event-related potential (ERPs) studies showed that even at this behavioral indifference time, the detection of shortening and lengthening might rely on different aspects of information processing. This work was aimed to investigate whether the pre-attentive processing of local tempo perturbations, i.e., IOI shortening and lengthening, are different when the basic tempo is at the behavioral indifference area. Tempo perturbations were introduced by shortening or lengthening the third IOI by 10% of the base IOI of the 5-beat isochronous sequence. ERPs recorded in a passive experiment showed that both tempo perturbations elicited a distinct frontal mismatch negativity (MMN). The low resolution electromagnetic tomography (LORETA) source estimation indicated a left prefrontal predominance activity around the MMN peak, implicating an important role of the frontal lobe in the processing of local tempo perturbations. Statistical analysis revealed that the MMN to IOI shortening had an earlier and greater peak than that to IOI lengthening, implying that IOI shortening might be more easily to be detected than IOI lengthening even at indifference tempo. Our results suggested that local IOI perturbations at behavioral indifference area have an asymmetric effect on the pre-attentive processing of temporal variation detection.
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Affiliation(s)
- Yongxiu Lai
- Key Laboratory for NeuroInformation of Ministry of Education, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, China
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202
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Hämäläinen JA, Ortiz-Mantilla S, Benasich AA. Source localization of event-related potentials to pitch change mapped onto age-appropriate MRIs at 6 months of age. Neuroimage 2010; 54:1910-8. [PMID: 20951812 DOI: 10.1016/j.neuroimage.2010.10.016] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2010] [Revised: 09/10/2010] [Accepted: 10/06/2010] [Indexed: 11/26/2022] Open
Abstract
Auditory event-related potentials (ERPs) have been used to understand how the brain processes auditory input, and to track developmental change in sensory systems. Localizing ERP generators can provide invaluable insights into how and where auditory information is processed. However, age-appropriate infant brain templates have not been available to aid such developmental mapping. In this study, auditory change detection responses of brain ERPs were examined in 6-month-old infants using discrete and distributed source localization methods mapped onto age-appropriate magnetic resonance images. Infants received a passive oddball paradigm using fast-rate non-linguistic auditory stimuli (tone doublets) with the deviant incorporating a pitch change for the second tone. Data was processed using two different high-pass filters. When a 0.5 Hz filter was used, the response to the pitch change was a large frontocentral positive component. When a 3 Hz filter was applied, two temporally consecutive components associated with change detection were seen: one with negative voltage, and another with positive voltage over frontocentral areas. Both components were localized close to the auditory cortex with an additional source near to the anterior cingulate cortex. The sources for the negative response had a more tangential orientation relative to the supratemporal plane compared to the positive response, which showed a more lateral, oblique orientation. The results described here suggest that at 6 months of age infants generate similar response patterns and use analogous cortical areas to that of adults to detect changes in the auditory environment. Moreover, the source locations and orientations, together with waveform topography and morphology provide evidence in infants for feature-specific change detection followed by involuntary switching of attention.
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Affiliation(s)
- Jarmo A Hämäläinen
- Center for Molecular and Behavioral Neuroscience, Rutgers, The State University of New Jersey, Newark, NJ 07102, USA.
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203
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Näätänen R, Kujala T, Winkler I. Auditory processing that leads to conscious perception: A unique window to central auditory processing opened by the mismatch negativity and related responses. Psychophysiology 2010; 48:4-22. [PMID: 20880261 DOI: 10.1111/j.1469-8986.2010.01114.x] [Citation(s) in RCA: 338] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Risto Näätänen
- Department of Psychology, University of Tartu, Tartu, Estonia.
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204
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Involuntary switching of attention mediates differences in event-related responses to complex tones between early and late Spanish-English bilinguals. Brain Res 2010; 1362:78-92. [PMID: 20849832 DOI: 10.1016/j.brainres.2010.09.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Revised: 09/03/2010] [Accepted: 09/08/2010] [Indexed: 11/20/2022]
Abstract
Most research with bilinguals has used speech stimuli to demonstrate differences in auditory processing abilities. Two main factors have been identified as modulators of such differences: proficiency and age of acquisition of the second language (L2). However, whether the bilingual brain differs from the monolingual in the efficient processing of non-verbal auditory events (known to be critical to the acoustic analysis of the speech stream) remains unclear. In this EEG/ERP study, using the mismatch negativity (MMN), P3a, and late negativity (LN), we examined differences in discrimination, involuntary switching of attention and reorienting of attention between monolinguals and bilinguals as they processed complex tones. Further, we examined the role that age of acquisition plays in modulating such responses. A group of English monolinguals and a group of proficient Spanish-English bilinguals were presented with a multiple-deviant oddball paradigm with four deviant conditions (duration, frequency, silent gap, and frequency modulation). Late bilinguals, who learned English after age 10, exhibited larger MMN and P3a responses than early bilinguals, across all deviant conditions. Significant associations were found between amplitude of the responses and both age of L2 acquisition and years of L2 experience. Individuals who acquired English at later ages and had fewer years of L2 experience had larger MMN, P3a, and LN responses than those who learned it earlier. These findings demonstrate that age of L2 acquisition is an important modulator of auditory responses in bilinguals even when processing non-speech signals. Involuntary attention switching is suggested as the main factor driving these differences.
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205
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Abstract
Training can change the functional and structural organization of the brain, and animal models demonstrate that the hippocampus formation is particularly susceptible to training-related neuroplasticity. In humans, however, direct evidence for functional plasticity of the adult hippocampus induced by training is still missing. Here, we used musicians' brains as a model to test for plastic capabilities of the adult human hippocampus. By using functional magnetic resonance imaging optimized for the investigation of auditory processing, we examined brain responses induced by temporal novelty in otherwise isochronous sound patterns in musicians and musical laypersons, since the hippocampus has been suggested previously to be crucially involved in various forms of novelty detection. In the first cross-sectional experiment, we identified enhanced neural responses to temporal novelty in the anterior left hippocampus of professional musicians, pointing to expertise-related differences in hippocampal processing. In the second experiment, we evaluated neural responses to acoustic temporal novelty in a longitudinal approach to disentangle training-related changes from predispositional factors. For this purpose, we examined an independent sample of music academy students before and after two semesters of intensive aural skills training. After this training period, hippocampal responses to temporal novelty in sounds were enhanced in musical students, and statistical interaction analysis of brain activity changes over time suggests training rather than predisposition effects. Thus, our results provide direct evidence for functional changes of the adult hippocampus in humans related to musical training.
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206
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The mismatch negativity (MMN) with no standard stimulus. Clin Neurophysiol 2010; 121:1043-50. [DOI: 10.1016/j.clinph.2010.02.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Revised: 02/01/2010] [Accepted: 02/03/2010] [Indexed: 11/23/2022]
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207
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Interhemisphere Asymmetry of Auditory Evoked Potentials in Humans and Mismatch Negativity during Sound Source Localization. ACTA ACUST UNITED AC 2010; 40:629-38. [DOI: 10.1007/s11055-010-9305-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2008] [Accepted: 10/21/2008] [Indexed: 11/27/2022]
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208
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Tse CY, Gordon BA, Fabiani M, Gratton G. Frequency analysis of the visual steady-state response measured with the fast optical signal in younger and older adults. Biol Psychol 2010; 85:79-89. [PMID: 20566389 DOI: 10.1016/j.biopsycho.2010.05.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 04/19/2010] [Accepted: 05/22/2010] [Indexed: 11/29/2022]
Abstract
Relatively high frequency activity (>4Hz) carries important information about the state of the brain or its response to high frequency events. The electroencephalogram (EEG) is commonly used to study these changes because it possesses high temporal resolution and a good signal-to-noise ratio. However, it provides limited spatial information. Non-invasive fast optical signals (FOS) have been proposed as a neuroimaging tool combining spatial and temporal resolution. Yet, this technique has not been applied to study high frequency brain oscillations because of its relatively low signal-to-noise ratio. Here we investigate the sensitivity of FOS to relatively high-frequency brain oscillations. We measured the steady-state optical response elicited in medial and lateral occipital cortex by checkerboard reversals occurring at 4, 6, and 8Hz in younger and older adults. Stimulus-dependent oscillations were observed at the predicted stimulation frequency. In addition, in the younger adults the FOS steady-state response was smaller in lateral than medial areas, whereas in the older adults it was reversed in these two cortical regions. This may reflect diminished top-down inhibitory control in the older adults. The results indicate that FOS can be used to study the modulation of relatively high-frequency brain oscillations in adjacent cortical regions.
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Affiliation(s)
- Chun-Yu Tse
- Beckman Institute and Department of Psychology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL 61801-2325, USA
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209
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Sewell RA, Skosnik PD, Garcia-Sosa I, Ranganathan M, D'Souza DC. Efeitos comportamentais, cognitivos e psicofisiológicos dos canabinoides: relevância para a psicose e a esquizofrenia. BRAZILIAN JOURNAL OF PSYCHIATRY 2010. [DOI: 10.1590/s1516-44462010000500005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Avanços recentes no conhecimento sobre a função do receptor de canabinoide renovaram o interesse na associação entre cannabis e psicose. Linhas convergentes de evidências sugerem que os canabinoides podem produzir uma ampla gama de sintomas transitórios positivos, negativos e cognitivos assemelhados aos de esquizofrenia. Os canabinoides também produzem alguns déficits psicofisiológicos sabidamente presentes na esquizofrenia. É igualmente claro que em indivíduos com um transtorno psicótico estabelecido, os canabinoides podem exacerbar sintomas, desencadear recaídas e ter consequências negativas no curso da doença. Evidências crescentes sugerem que a exposição precoce e pesada à cannabis pode aumentar o risco de se desenvolver um transtorno psicótico como a esquizofrenia. A relação entre exposição à cannabis e esquizofrenia preenche alguns, mas não todos os critérios usuais de causalidade. Porém, a maioria das pessoas que utilizam cannabis não desenvolve esquizofrenia e muitas pessoas diagnosticadas com esquizofrenia nunca utilizaram cannabis. Portanto, é provável que a exposição à cannabis seja uma "causa componente" que interage com outros fatores para "causar" esquizofrenia ou outro transtorno psicótico, mas não é nem necessária nem suficiente para fazê-lo sozinha. No entanto, na ausência de causas conhecidas da esquizofrenia e com as implicações de políticas de saúde pública, se tal vínculo for estabelecido, as causas componentes, tais como a exposição a canabinoide, devem continuar sendo um foco de estudos futuros. Finalmente, são necessárias mais pesquisas para identificar os fatores subjacentes à vulnerabilidade à psicose relacionada a canabinoide e para elucidar os mecanismos biológicos subjacentes a esse risco.
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Affiliation(s)
- R. Andrew Sewell
- VA Connecticut Healthcare System, EUA; Connecticut Mental Health Center, EUA; Yale University School of Medicine, EUA
| | - Patrick D. Skosnik
- VA Connecticut Healthcare System, EUA; Connecticut Mental Health Center, EUA; Yale University School of Medicine, EUA
| | - Icelini Garcia-Sosa
- VA Connecticut Healthcare System, EUA; Connecticut Mental Health Center, EUA; Yale University School of Medicine, EUA
| | - Mohini Ranganathan
- VA Connecticut Healthcare System, EUA; Connecticut Mental Health Center, EUA; Yale University School of Medicine, EUA
| | - Deepak Cyril D'Souza
- VA Connecticut Healthcare System, EUA; Connecticut Mental Health Center, EUA; Yale University School of Medicine, EUA
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210
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Sysoeva OV, Maluchenko NV, Smirnov KS, Shleptsova VA, Ivanitsky AM, Tonevitsky AG. Peculiarities of Brain Information Processing in Persons with Different Serotonin Transporter Gene Variants. Bull Exp Biol Med 2010; 148:731-4. [DOI: 10.1007/s10517-010-0803-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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211
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Urakawa T, Inui K, Yamashiro K, Kakigi R. Cortical dynamics of the visual change detection process. Psychophysiology 2010; 47:905-12. [PMID: 20230497 DOI: 10.1111/j.1469-8986.2010.00987.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this study, the cortical dynamics of the visual change detection process were investigated using an oddball paradigm similar to that used in auditory mismatch negativity studies. When subjects watched a silent movie, color stimuli were presented using 280 dual color LEDs arranged along the frame of the video screen. Task-irrelevant red and blue color stimuli were presented randomly at a probability of 10% and 90%, respectively, in one session and vice versa for the other one, and we traced brain responses using magnetoencephalography. Results show that activation in the middle occipital gyrus (MOG) was significantly enhanced for the infrequent stimulus, while early activities in Brodmann's area 17/18 were comparable for the frequent and infrequent stimuli. These results suggest that automatic visual change detection is associated with the MOG activity.
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Affiliation(s)
- Tomokazu Urakawa
- Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Japan.
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212
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Marreiros AC, Kiebel SJ, Friston KJ. A dynamic causal model study of neuronal population dynamics. Neuroimage 2010; 51:91-101. [PMID: 20132892 PMCID: PMC3221045 DOI: 10.1016/j.neuroimage.2010.01.098] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2009] [Accepted: 01/27/2010] [Indexed: 11/16/2022] Open
Abstract
In this paper, we compare mean-field and neural-mass models of electrophysiological responses using Bayesian model comparison. In previous work, we presented a mean-field model of neuronal dynamics as observed with magnetoencephalography and electroencephalography. Unlike neural-mass models, which consider only the mean activity of neuronal populations, mean-field models track the distribution (e.g., mean and dispersion) of population activity. This can be important if the mean affects the dispersion or vice versa. Here, we introduce a dynamical causal model based on mean-field (i.e., population density) models of neuronal activity, and use it to assess the evidence for a coupling between the mean and dispersion of hidden neuronal states using observed electromagnetic responses. We used Bayesian model comparison to compare homologous mean-field and neural-mass models, asking whether empirical responses support a role for population variance in shaping neuronal dynamics. We used the mismatch negativity (MMN) and somatosensory evoked potentials (SEP) as representative neuronal responses in physiological and non-physiological paradigms respectively. Our main conclusion was that although neural-mass models may be sufficient for cognitive paradigms, there is clear evidence for an effect of dispersion at the high levels of depolarization evoked in SEP paradigms. This suggests that (i) the dispersion of neuronal states within populations generating evoked brain signals can be manifest in observed brain signals and that (ii) the evidence for their effects can be accessed with dynamic causal model comparison.
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Affiliation(s)
- André C Marreiros
- The Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, UCL, 12 Queen Square, London, UK WC1N 3BG, UK.
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213
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Leung S, Croft RJ, Guille V, Scholes K, O'Neill BV, Phan KL, Nathan PJ. Acute dopamine and/or serotonin depletion does not modulate mismatch negativity (MMN) in healthy human participants. Psychopharmacology (Berl) 2010; 208:233-44. [PMID: 20012022 DOI: 10.1007/s00213-009-1723-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Accepted: 11/02/2009] [Indexed: 01/08/2023]
Abstract
RATIONALE Schizophrenia is commonly associated with impairments in pre-attentive change detection, as represented by reduced mismatch negativity (MMN). While the neurochemical basis of MMN has been linked to N-methyl-D: -aspartic acid (NMDA) receptor function, the roles of the dopaminergic and/or the serotonergic systems are not fully explored in humans. OBJECTIVES The aim of the present study was to investigate the effects of acutely depleting dopamine (DA) and serotonin (5-hydroxytryptamine, 5-HT) alone or simultaneously by depleting their amino acid precursors on MMN in healthy participants. METHODS Sixteen healthy male subjects participated in a double-blind, placebo-controlled, cross-over design in which each subject's duration MMN was assessed under four acute treatment conditions separated by a 5-day washout period: balanced amino acid control (no depletion), tyrosine/phenylalanine depletion (to reduce DA neurotransmission), tryptophan depletion (to reduce 5-HT neurotransmission) and tryptophan/tyrosine/phenylalanine depletion (to reduce DA and 5-HT neurotransmission simultaneously). RESULTS Acute depletion of either DA and 5-HT alone or simultaneously had no effect on MMN. CONCLUSIONS These findings suggest that modulation of the dopaminergic and serotonergic systems acutely does not lead to changes in MMN.
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Affiliation(s)
- Sumie Leung
- Brain Sciences Institute, Faculty of Life and Social Sciences, Swinburne University of Technology, P.O. Box 218, John Street Hawthorn, 3122, Melbourne, VIC, Australia.
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214
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Neurophysiological measures of sensory registration, stimulus discrimination, and selection in schizophrenia patients. Curr Top Behav Neurosci 2010; 4:283-309. [PMID: 21312404 DOI: 10.1007/7854_2010_59] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cortical Neurophysiological event related potentials (ERPs) are multidimensional measures of information processing that are well suited to efficiently parse automatic and controlled components of cognition that span the range of deficits exhibited in schizophrenia patients. Components following a stimulus reflect the sequence of neural processes triggered by the stimulus, beginning with early automatic sensory processes and proceeding through controlled decision and response related processes. Previous studies employing ERP paradigms have reported deficits of information processing in schizophrenia across automatic through attention dependent processes including sensory registration (N1), automatic change detection (MMN), the orienting or covert shift of attention towards novel or infrequent stimuli (P3a), and attentional allocation following successful target detection processes (P3b). These automatic and attention dependent information components are beginning to be recognized as valid targets for intervention in the context of novel treatment development for schizophrenia and related neuropsychiatric disorders. In this review, we describe three extensively studied ERP components (N1, mismatch negativity, P300) that are consistently deficient in schizophrenia patients and may serve as genetic endophenotypes and as quantitative biological markers of response outcome.
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215
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Näätänen R. Somatosensory mismatch negativity: a new clinical tool for developmental neurological research? Dev Med Child Neurol 2009; 51:930-1. [PMID: 19909306 DOI: 10.1111/j.1469-8749.2009.03386.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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216
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Mismatch Negativity: The Contribution of Differences in the Refractoriness of Stimulus-Specific Neuron Populations. ACTA ACUST UNITED AC 2009; 39:833-40. [DOI: 10.1007/s11055-009-9211-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2008] [Indexed: 11/27/2022]
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217
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Duncan CC, Barry RJ, Connolly JF, Fischer C, Michie PT, Näätänen R, Polich J, Reinvang I, Van Petten C. Event-related potentials in clinical research: guidelines for eliciting, recording, and quantifying mismatch negativity, P300, and N400. Clin Neurophysiol 2009; 120:1883-1908. [PMID: 19796989 DOI: 10.1016/j.clinph.2009.07.045] [Citation(s) in RCA: 737] [Impact Index Per Article: 49.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2008] [Revised: 06/26/2009] [Accepted: 07/04/2009] [Indexed: 01/17/2023]
Abstract
This paper describes recommended methods for the use of event-related brain potentials (ERPs) in clinical research and reviews applications to a variety of psychiatric and neurological disorders. Techniques are presented for eliciting, recording, and quantifying three major cognitive components with confirmed clinical utility: mismatch negativity (MMN), P300, and N400. Also highlighted are applications of each of the components as methods of investigating central nervous system pathology. The guidelines are intended to assist investigators who use ERPs in clinical research, in an effort to provide clear and concise recommendations and thereby to standardize methodology and facilitate comparability of data across laboratories.
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Affiliation(s)
- Connie C Duncan
- Clinical Psychophysiology and Psychopharmacology Laboratory, Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
| | - Robert J Barry
- School of Psychology and Brain & Behaviour Research Institute, University of Wollongong, Wollongong, NSW, Australia
| | - John F Connolly
- Department of Linguistics and Languages, McMaster University, Hamilton, Ont., Canada
| | - Catherine Fischer
- Hospices Civils de Lyon, Neurological Hospital and INSERM U821, Lyon, France
| | - Patricia T Michie
- School of Psychology, The University of Newcastle, Callaghan, NSW, Australia
| | - Risto Näätänen
- Department of Psychology, University of Tartu, Tartu, Estonia; Center of Functionally Integrative Neuroscience (CFIN), University of Aarhus, Aarhus, Denmark; Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Helsinki, Finland
| | - John Polich
- Cognitive Electrophysiology Laboratory, Molecular and Integrative Neurosciences Department, The Scripps Research Institute, La Jolla, CA, USA
| | - Ivar Reinvang
- Department of Psychology, University of Oslo, Oslo, Norway
| | - Cyma Van Petten
- Department of Psychology, Binghamton University, Binghamton, New York, USA
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218
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Kiebel SJ, Garrido MI, Moran R, Chen CC, Friston KJ. Dynamic causal modeling for EEG and MEG. Hum Brain Mapp 2009; 30:1866-76. [PMID: 19360734 DOI: 10.1002/hbm.20775] [Citation(s) in RCA: 162] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
We present a review of dynamic causal modeling (DCM) for magneto- and electroencephalography (M/EEG) data. DCM is based on a spatiotemporal model, where the temporal component is formulated in terms of neurobiologically plausible dynamics. Following an intuitive description of the model, we discuss six recent studies, which use DCM to analyze M/EEG and local field potentials. These studies illustrate how DCM can be used to analyze evoked responses (average response in time), induced responses (average response in time-frequency), and steady-state responses (average response in frequency). Bayesian model comparison plays a critical role in these analyses, by allowing one to compare equally plausible models in terms of their model evidence. This approach might be very useful in M/EEG research; where correlations among spatial and neuronal model parameter estimates can cause uncertainty about which model best explains the data. Bayesian model comparison resolves these uncertainties in a principled and formal way. We suggest that DCM and Bayesian model comparison provides a useful way to test hypotheses about distributed processing in the brain, using electromagnetic data.
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Affiliation(s)
- Stefan J Kiebel
- The Wellcome Trust Centre for Neuroimaging, University College London, 12 Queen Square, London, United Kingdom.
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219
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Ren GQ, Yang Y, Li X. Early cortical processing of linguistic pitch patterns as revealed by the mismatch negativity. Neuroscience 2009; 162:87-95. [DOI: 10.1016/j.neuroscience.2009.04.021] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2009] [Revised: 04/07/2009] [Accepted: 04/09/2009] [Indexed: 10/20/2022]
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220
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Preattentive Cortical-Evoked Responses to Pure Tones, Harmonic Tones, and Speech: Influence of Music Training. Ear Hear 2009; 30:432-46. [DOI: 10.1097/aud.0b013e3181a61bf2] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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221
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Fast multi-feature paradigm for recording several mismatch negativities (MMNs) to phonetic and acoustic changes in speech sounds. Biol Psychol 2009; 82:219-26. [PMID: 19646504 DOI: 10.1016/j.biopsycho.2009.07.008] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2008] [Revised: 07/15/2009] [Accepted: 07/21/2009] [Indexed: 11/20/2022]
Abstract
In this study, we addressed whether a new fast multi-feature mismatch negativity (MMN) paradigm can be used for determining the central auditory discrimination accuracy for several acoustic and phonetic changes in speech sounds. We recorded the MMNs in the multi-feature paradigm to changes in syllable intensity, frequency, and vowel length, as well as for consonant and vowel change, and compared these MMNs to those obtained with the traditional oddball paradigm. In addition, we examined the reliability of the multi-feature paradigm by repeating the recordings with the same subjects 1-7 days after the first recordings. The MMNs recorded with the multi-feature paradigm were similar to those obtained with the oddball paradigm. Furthermore, only minor differences were observed in the MMN amplitudes across the two recording sessions. Thus, this new multi-feature paradigm with speech stimuli provides similar results as the oddball paradigm, and the MMNs recorded with the new paradigm were reproducible.
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222
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Salmi J, Rinne T, Koistinen S, Salonen O, Alho K. Brain networks of bottom-up triggered and top-down controlled shifting of auditory attention. Brain Res 2009; 1286:155-64. [PMID: 19577551 DOI: 10.1016/j.brainres.2009.06.083] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2009] [Revised: 06/18/2009] [Accepted: 06/25/2009] [Indexed: 11/18/2022]
Abstract
During functional magnetic resonance imaging (fMRI), our participants selectively attended to tone streams at the left or right, and occasionally shifted their attention from one stream to another as guided by a centrally presented visual cue. Duration changes in the to-be-attended stream served as targets. Loudness deviating tones (LDTs) occurred infrequently in both streams to catch attention in a bottom-up manner, as indicated by their effects on reaction times to targets. LDTs activated the right temporo-parietal junction (TPJ), posterior parts of the left inferior/middle frontal gyrus (IFG/MFG), ventromedial parts of the superior parietal lobule (SPL), and left frontal eye field/premotor cortex (FEF/PMC). In addition, LDTs in the to-be-ignored sound stream were associated with enhanced activity in the ventromedial prefrontal cortex (VMPFC) possibly related to evaluation of the distracting event. Top-down controlled cue-guided attention shifts (CASs) activated bilateral areas in the SPL, intraparietal sulcus (IPS), FEF/PMC, TPJ, IFG/MFG, and cingulate/medial frontal gyrus, and crus I/II of the cerebellum. Thus, our results suggest that in audition top-down controlled and bottom-up triggered shifting of attention activate largely overlapping temporo-parietal, superior parietal and frontal areas. As the IPS, superior parts of the SPL, and crus I/II were activated specifically by top-down controlled attention shifts, and the VMPFC was specifically activated by bottom-up triggered attention shifts, our results also suggest some differences between auditory top-down controlled and bottom-up triggered shifting of attention.
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Affiliation(s)
- Juha Salmi
- Department of Psychology, PO Box 9, FI-00014 University of Helsinki, Finland.
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223
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Changing meaning causes coupling changes within higher levels of the cortical hierarchy. Proc Natl Acad Sci U S A 2009; 106:11765-70. [PMID: 19553207 DOI: 10.1073/pnas.0811402106] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Processing of speech and nonspeech sounds occurs bilaterally within primary auditory cortex and surrounding regions of the superior temporal gyrus; however, the manner in which these regions interact during speech and nonspeech processing is not well understood. Here, we investigate the underlying neuronal architecture of the auditory system with magnetoencephalography and a mismatch paradigm. We used a spoken word as a repeating "standard" and periodically introduced 3 "oddball" stimuli that differed in the frequency spectrum of the word's vowel. The closest deviant was perceived as the same vowel as the standard, whereas the other 2 deviants were perceived as belonging to different vowel categories. The neuronal responses to these vowel stimuli were compared with responses elicited by perceptually matched tone stimuli under the same paradigm. For both speech and tones, deviant stimuli induced coupling changes within the same bilateral temporal lobe system. However, vowel oddball effects increased coupling within the left posterior superior temporal gyrus, whereas perceptually equivalent nonspeech oddball effects increased coupling within the right primary auditory cortex. Thus, we show a dissociation in neuronal interactions, occurring at both different hierarchal levels of the auditory system (superior temporal versus primary auditory cortex) and in different hemispheres (left versus right). This hierarchical specificity depends on whether auditory stimuli are embedded in a perceptual context (i.e., a word). Furthermore, our lateralization results suggest left hemisphere specificity for the processing of phonological stimuli, regardless of their elemental (i.e., spectrotemporal) characteristics.
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224
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Garrido MI, Kilner JM, Kiebel SJ, Stephan KE, Baldeweg T, Friston KJ. Repetition suppression and plasticity in the human brain. Neuroimage 2009; 48:269-79. [PMID: 19540921 DOI: 10.1016/j.neuroimage.2009.06.034] [Citation(s) in RCA: 148] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2008] [Revised: 04/28/2009] [Accepted: 06/15/2009] [Indexed: 10/20/2022] Open
Abstract
The suppression of neuronal responses to a repeated event is a ubiquitous phenomenon in neuroscience. However, the underlying mechanisms remain largely unexplored. The aim of this study was to examine the temporal evolution of experience-dependent changes in connectivity induced by repeated stimuli. We recorded event-related potentials (ERPs) during frequency changes of a repeating tone. Bayesian inversion of dynamic causal models (DCM) of ERPs revealed systematic repetition-dependent changes in both intrinsic and extrinsic connections, within a hierarchical cortical network. Critically, these changes occurred very quickly, over inter-stimulus intervals that implicate short-term synaptic plasticity. Furthermore, intrinsic (within-source) connections showed biphasic changes that were much faster than changes in extrinsic (between-source) connections, which decreased monotonically with repetition. This study shows that auditory perceptual learning is associated with repetition-dependent plasticity in the human brain. It is remarkable that distinct changes in intrinsic and extrinsic connections could be quantified so reliably and non-invasively using EEG.
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Affiliation(s)
- Marta I Garrido
- Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, UK.
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225
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Bickel S, Javitt DC. Neurophysiological and neurochemical animal models of schizophrenia: focus on glutamate. Behav Brain Res 2009; 204:352-62. [PMID: 19433116 DOI: 10.1016/j.bbr.2009.05.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2008] [Revised: 04/29/2009] [Accepted: 05/01/2009] [Indexed: 10/20/2022]
Abstract
Deficits in N-methyl-d-aspartate receptor (NMDAR) function play a critical role in the pathophysiology of schizophrenia. Animal models are needed to investigate possible mechanisms underlying NMDA dysfunction in schizophrenia as well as development of new therapeutic approaches. A major difficulty in developing animal models for schizophrenia is the identification of quantifiable measures that can be tested in a similar fashion in both humans and animals. The majority of animal models utilize analogous measures, wherein species-specific behaviors are used as presumed parallel manifestations of a common underlying construct. In vivo microdialysis and electrophysiology represent two methodologies in which homologous measures can instead be obtained in both animals and humans. In both techniques, well-validated, NMDA-sensitive measures are analyzed in rodents using probes implanted directly into cortex or subcortical structures. We discuss the currently available data from studies that used these methods in non-human primate and rodent glutamate models. In addition, we emphasize the possible relevance of the amphetamine-challenge studies to positive symptoms and of EEG measures to cognitive deficits in schizophrenia.
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Affiliation(s)
- Stephan Bickel
- Schizophrenia Research Center, Nathan Kline Institute for Psychiatric Research/New York University School of Medicine, 140 Old Orangeburg Rd, Orangeburg, NY 10962, USA
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226
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Knott VJ, Bolton K, Heenan A, Shah D, Fisher DJ, Villeneuve C. Effects of acute nicotine on event-related potential and performance indices of auditory distraction in nonsmokers. Nicotine Tob Res 2009; 11:519-30. [DOI: 10.1093/ntr/ntp044] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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227
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Kwon MS, Kujala T, Huotilainen M, Shestakova A, Näätänen R, Hämäläinen H. Preattentive auditory information processing under exposure to the 902 MHz GSM mobile phone electromagnetic field: A mismatch negativity (MMN) study. Bioelectromagnetics 2009; 30:241-8. [DOI: 10.1002/bem.20470] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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228
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Hsiao FJ, Wu ZA, Ho LT, Lin YY. Theta oscillation during auditory change detection: An MEG study. Biol Psychol 2009; 81:58-66. [DOI: 10.1016/j.biopsycho.2009.01.007] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2008] [Revised: 01/29/2009] [Accepted: 01/29/2009] [Indexed: 11/16/2022]
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229
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Garrido MI, Kilner JM, Kiebel SJ, Friston KJ. Dynamic causal modeling of the response to frequency deviants. J Neurophysiol 2009; 101:2620-31. [PMID: 19261714 PMCID: PMC2681422 DOI: 10.1152/jn.90291.2008] [Citation(s) in RCA: 138] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This article describes the use of dynamic causal modeling to test hypotheses about the genesis of evoked responses. Specifically, we consider the mismatch negativity (MMN), a well-characterized response to deviant sounds and one of the most widely studied evoked responses. There have been several mechanistic accounts of how the MMN might arise. It has been suggested that the MMN results from a comparison between sensory input and a memory trace of previous input, although others have argued that local adaptation, due to stimulus repetition, is sufficient to explain the MMN. Thus the precise mechanisms underlying the generation of the MMN remain unclear. This study tests some biologically plausible spatiotemporal dipole models that rest on changes in extrinsic top-down connections (that enable comparison) and intrinsic changes (that model adaptation). Dynamic causal modeling suggested that responses to deviants are best explained by changes in effective connectivity both within and between cortical sources in a hierarchical network of distributed sources. Our model comparison suggests that both adaptation and memory comparison operate in concert to produce the early (N1 enhancement) and late (MMN) parts of the response to frequency deviants. We consider these mechanisms in the light of predictive coding and hierarchical inference in the brain.
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Affiliation(s)
- Marta I Garrido
- Wellcome Trust Centre for Neuroimaging, Institute of Neurology, UCL, 12 Queen Square, London, UK WC1N 3BG.
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230
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Central auditory dysfunction in schizophrenia as revealed by the mismatch negativity (MMN) and its magnetic equivalent MMNm: a review. Int J Neuropsychopharmacol 2009; 12:125-35. [PMID: 18771603 DOI: 10.1017/s1461145708009322] [Citation(s) in RCA: 179] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Since the early 1990s, the auditory change-detection response, mismatch negativity (MMN) and its magnetoencephalographic (MEG) equivalent MMNm have been applied in a large number of studies on schizophrenia. These studies have enhanced our understanding of the central auditory dysfunction underlying schizophrenia. The attenuation of the MMN amplitude is a systematic and robust neurophysiological finding in these patients. The gradual attenuation of the MMN amplitude resulting from frequency change reflects the progress of the disease, particularly the impairment occurring as a function of illness duration, whereas the MMN deficiency for duration change may be more closely linked to the genetic aspect of the illness. Electroencephalographic (EEG) and magnetoencephalographic (MEG) studies, together, suggest that both the temporal and frontal cortices contributing to MMN generation are affected in schizophrenia patients. Furthermore, abnormalities in auditory perception and discrimination revealed by a deficient temporal MMN generator process might be associated with patients' positive symptoms, whereas the dampened frontal attention-switching function, suggested by the attenuated responses of the frontal MMN generator, might contribute to the negative symptoms such as social withdrawal. In addition, gradual MMN amplitude reduction, in particular that for frequency change, reflects cognitive and functional impairment occurring as a function of illness duration. Finally, as MMN can be detected even in animals such as the mouse, it might provide a useful biomarker for assessing the effects of the drugs developed to fight the cognitive and functional impairments in schizophrenia patients.
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231
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Garrido MI, Kilner JM, Stephan KE, Friston KJ. The mismatch negativity: a review of underlying mechanisms. Clin Neurophysiol 2009; 120:453-63. [PMID: 19181570 PMCID: PMC2671031 DOI: 10.1016/j.clinph.2008.11.029] [Citation(s) in RCA: 841] [Impact Index Per Article: 56.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2008] [Revised: 11/10/2008] [Accepted: 11/29/2008] [Indexed: 12/12/2022]
Abstract
The mismatch negativity (MMN) is a brain response to violations of a rule, established by a sequence of sensory stimuli (typically in the auditory domain) [Näätänen R. Attention and brain function. Hillsdale, NJ: Lawrence Erlbaum; 1992]. The MMN reflects the brain's ability to perform automatic comparisons between consecutive stimuli and provides an electrophysiological index of sensory learning and perceptual accuracy. Although the MMN has been studied extensively, the neurophysiological mechanisms underlying the MMN are not well understood. Several hypotheses have been put forward to explain the generation of the MMN; amongst these accounts, the "adaptation hypothesis" and the "model adjustment hypothesis" have received the most attention. This paper presents a review of studies that focus on neuronal mechanisms underlying the MMN generation, discusses the two major explanatory hypotheses, and proposes predictive coding as a general framework that attempts to unify both.
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Affiliation(s)
- Marta I Garrido
- Wellcome Trust Centre for Neuroimaging, University College London, UK.
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232
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Neural signature of the conscious processing of auditory regularities. Proc Natl Acad Sci U S A 2009; 106:1672-7. [PMID: 19164526 DOI: 10.1073/pnas.0809667106] [Citation(s) in RCA: 412] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Can conscious processing be inferred from neurophysiological measurements? Some models stipulate that the active maintenance of perceptual representations across time requires consciousness. Capitalizing on this assumption, we designed an auditory paradigm that evaluates cerebral responses to violations of temporal regularities that are either local in time or global across several seconds. Local violations led to an early response in auditory cortex, independent of attention or the presence of a concurrent visual task, whereas global violations led to a late and spatially distributed response that was only present when subjects were attentive and aware of the violations. We could detect the global effect in individual subjects using functional MRI and both scalp and intracerebral event-related potentials. Recordings from 8 noncommunicating patients with disorders of consciousness confirmed that only conscious individuals presented a global effect. Taken together these observations suggest that the presence of the global effect is a signature of conscious processing, although it can be absent in conscious subjects who are not aware of the global auditory regularities. This simple electrophysiological marker could thus serve as a useful clinical tool.
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233
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Astikainen P, Lillstrang E, Ruusuvirta T. Visual mismatch negativity for changes in orientation - a sensory memory-dependent response. Eur J Neurosci 2008; 28:2319-24. [DOI: 10.1111/j.1460-9568.2008.06510.x] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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234
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Díaz B, Baus C, Escera C, Costa A, Sebastián-Gallés N. Brain potentials to native phoneme discrimination reveal the origin of individual differences in learning the sounds of a second language. Proc Natl Acad Sci U S A 2008; 105:16083-8. [PMID: 18852470 PMCID: PMC2570969 DOI: 10.1073/pnas.0805022105] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2008] [Indexed: 11/18/2022] Open
Abstract
Human beings differ in their ability to master the sounds of their second language (L2). Phonetic training studies have proposed that differences in phonetic learning stem from differences in psychoacoustic abilities rather than speech-specific capabilities. We aimed at finding the origin of individual differences in L2 phonetic acquisition in natural learning contexts. We consider two alternative explanations: a general psychoacoustic origin vs. a speech-specific one. For this purpose, event-related potentials (ERPs) were recorded from two groups of early, proficient Spanish-Catalan bilinguals who differed in their mastery of the Catalan (L2) phonetic contrast /e-epsilon/. Brain activity in response to acoustic change detection was recorded in three different conditions involving tones of different length (duration condition), frequency (frequency condition), and presentation order (pattern condition). In addition, neural correlates of speech change detection were also assessed for both native (/o/-/e/) and nonnative (/o/-/ö/) phonetic contrasts (speech condition). Participants' discrimination accuracy, reflected electrically as a mismatch negativity (MMN), was similar between the two groups of participants in the three acoustic conditions. Conversely, the MMN was reduced in poor perceivers (PP) when they were presented with speech sounds. Therefore, our results support a speech-specific origin of individual variability in L2 phonetic mastery.
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Affiliation(s)
- Begoña Díaz
- *Grup de Recerca Neurociència Cognitiva, Parc Científic UB and Hospital Sant Joan de Déu (Edifici Docent), Santa Rosa 39-57, Esplugues, Barcelona 08950, Spain
- Departament de Psicologia Bàsica, Facultat de Psicologia, Universitat de Barcelona, Passeig de la Vall d'Hebron 171, Barcelona 08035, Spain
| | - Cristina Baus
- Departamento de Psicología Cognitiva, Facultad de Psicología, Universidad de La Laguna, Campus Guajara S/N Tenerife 38205, Spain; and
| | - Carles Escera
- Cognitive Neuroscience Research Group, Department of Psychiatry and Clinical Psychobiology, Faculty of Psychology, University of Barcelona, Passeig Vall d'Hebron 171, Barcelona 08035, Spain
| | - Albert Costa
- *Grup de Recerca Neurociència Cognitiva, Parc Científic UB and Hospital Sant Joan de Déu (Edifici Docent), Santa Rosa 39-57, Esplugues, Barcelona 08950, Spain
- Departament de Psicologia Bàsica, Facultat de Psicologia, Universitat de Barcelona, Passeig de la Vall d'Hebron 171, Barcelona 08035, Spain
| | - Núria Sebastián-Gallés
- *Grup de Recerca Neurociència Cognitiva, Parc Científic UB and Hospital Sant Joan de Déu (Edifici Docent), Santa Rosa 39-57, Esplugues, Barcelona 08950, Spain
- Departament de Psicologia Bàsica, Facultat de Psicologia, Universitat de Barcelona, Passeig de la Vall d'Hebron 171, Barcelona 08035, Spain
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235
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Degerman A, Rinne T, Särkkä AK, Salmi J, Alho K. Selective attention to sound location or pitch studied with event-related brain potentials and magnetic fields. Eur J Neurosci 2008; 27:3329-41. [PMID: 18598270 DOI: 10.1111/j.1460-9568.2008.06286.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Event-related brain potentials (ERPs) and magnetic fields (ERFs) were used to compare brain activity associated with selective attention to sound location or pitch in humans. Sixteen healthy adults participated in the ERP experiment, and 11 adults in the ERF experiment. In different conditions, the participants focused their attention on a designated sound location or pitch, or pictures presented on a screen, in order to detect target sounds or pictures among the attended stimuli. In the Attend Location condition, the location of sounds varied randomly (left or right), while their pitch (high or low) was kept constant. In the Attend Pitch condition, sounds of varying pitch (high or low) were presented at a constant location (left or right). Consistent with previous ERP results, selective attention to either sound feature produced a negative difference (Nd) between ERPs to attended and unattended sounds. In addition, ERPs showed a more posterior scalp distribution for the location-related Nd than for the pitch-related Nd, suggesting partially different generators for these Nds. The ERF source analyses found no source distribution differences between the pitch-related Ndm (the magnetic counterpart of the Nd) and location-related Ndm in the superior temporal cortex (STC), where the main sources of the Ndm effects are thought to be located. Thus, the ERP scalp distribution differences between the location-related and pitch-related Nd effects may have been caused by activity of areas outside the STC, perhaps in the inferior parietal regions.
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236
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Sculthorpe LD, Collin CA, Campbell KB. The influence of strongly focused visual attention on the detection of change in an auditory pattern. Brain Res 2008; 1234:78-86. [PMID: 18674520 DOI: 10.1016/j.brainres.2008.07.031] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2008] [Revised: 06/30/2008] [Accepted: 07/02/2008] [Indexed: 11/30/2022]
Abstract
The mismatch negativity, an ERP that reflects the detection of change in the auditory environment, is considered to be a relatively automatic process. Its automaticity has by in large been studied using the oddball paradigm, in which a physical feature of a frequently presented standard stimulus is changed. In the present study, the automaticity of the MMN is tested using a MMN elicited by a violation of a more abstract auditory pattern. Fourteen subjects were presented with an alternating pattern of two tones (ABABAB) that was occasionally broken by deviant repetitions (e.g., ABABABBBAB). The alternating tones were separated by 1 or 6 semitones in different conditions. The subjects were engaged in a continuous multiple object tracking (MOT) task and thus ignored the auditory stimuli. Difficulty of the MOT task was manipulated by increasing the number of objects to be tracked. Subjects were also asked to read a text and ignore the auditory stimuli in another condition. A much larger MMN was elicited by pattern violations in the 6 than in the 1 semitone condition. The difficult visual task should have presumably required greater attentional focus than the easy task, and performance did deteriorate during the difficult MOT. The MMN, however, was not affected by the demands of the MOT task. 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.
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237
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Mismatch negativity generation in the human 5HT2A agonist and NMDA antagonist model of psychosis. Psychopharmacology (Berl) 2008; 199:77-88. [PMID: 18488201 PMCID: PMC2668652 DOI: 10.1007/s00213-008-1129-4] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2007] [Accepted: 02/27/2008] [Indexed: 10/25/2022]
Abstract
RATIONALE Many studies have reported deficits of mismatch negativity (MMN) in schizophrenic patients. Pharmacological challenges with hallucinogens in healthy humans are used as models for psychotic states. Previous studies reported a significant reduction of MMN after ketamine (N-methyl-D-aspartate acid [NMDA] antagonist model) but not after psilocybin (5HT2A agonist model). OBJECTIVES The aim of the present study was to directly compare the two models of psychosis using an intraindividual crossover design. MATERIALS AND METHODS Fifteen healthy subjects participated in a randomized, double-blind, crossover study with a low and a high dose of the 5HT2A agonist dimethyltryptamine (DMT) and the NMDA antagonist S-ketamine. During electroencephalographic recording, the subjects were performing the AX-version of a continuous performance test (AX-CPT). A source analysis of MMN was performed on the basis of a four-source model of MMN generation. RESULTS Nine subjects completed both experimental days with the two doses of both drugs. Overall, we found blunted MMN and performance deficits in the AX-CPT after both drugs. However, the reduction in MMN activity was overall more pronounced after S-ketamine intake, and only S-ketamine had a significant impact on the frontal source of MMN. CONCLUSIONS The NDMA antagonist model and the 5HT2A agonist model of psychosis display distinct neurocognitive profiles. These findings are in line with the view of the two classes of hallucinogens modeling different aspects of psychosis.
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Bendixen A, Prinz W, Horváth J, Trujillo-Barreto NJ, Schröger E. Rapid extraction of auditory feature contingencies. Neuroimage 2008; 41:1111-9. [DOI: 10.1016/j.neuroimage.2008.03.040] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2008] [Revised: 02/28/2008] [Accepted: 03/25/2008] [Indexed: 10/22/2022] Open
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239
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Fuentemilla L, Marco-Pallarés J, Münte T, Grau C. Theta EEG oscillatory activity and auditory change detection. Brain Res 2008; 1220:93-101. [DOI: 10.1016/j.brainres.2007.07.079] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2007] [Revised: 07/26/2007] [Accepted: 07/30/2007] [Indexed: 11/16/2022]
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241
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Garrido MI, Friston KJ, Kiebel SJ, Stephan KE, Baldeweg T, Kilner JM. The functional anatomy of the MMN: a DCM study of the roving paradigm. Neuroimage 2008; 42:936-44. [PMID: 18602841 DOI: 10.1016/j.neuroimage.2008.05.018] [Citation(s) in RCA: 304] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 05/01/2008] [Accepted: 05/11/2008] [Indexed: 10/22/2022] Open
Abstract
Using dynamic causal modelling (DCM), we have presented provisional evidence to suggest: (i) the mismatch negativity (MMN) is generated by self-organised interactions within a hierarchy of cortical sources [Garrido, M.I., Kilner, J.M., Kiebel, S.J., Stephan, K.E., Friston, K.J., 2007. Dynamic causal modelling of evoked potentials: a reproducibility study. NeuroImage 36, 571-580] and (ii) the MMN rests on plastic change in both extrinsic (between-source) and intrinsic (within source) connections (Garrido et al., under review). In this work we re-visit these two key issues in the context of the roving paradigm. Critically, this paradigm allows us to discount any differential response to differences in the stimuli per se, because the standards and oddballs are physically identical. We were able to confirm both the hierarchical nature of the MMN generation and the conjoint role of changes in extrinsic and intrinsic connections. These findings are consistent with a predictive coding account of repetition-suppression and the MMN, which gracefully accommodates two important mechanistic perspectives; the model-adjustment hypothesis [Winkler, I., Karmos, G., Näätänen, R., 1996. Adaptive modelling of the unattended acoustic environment reflected in the mismatch negativity event-related potential. Brain Res. 742, 239-252; Näätänen, R., Winkler, I., 1999. The concept of auditory stimulus representation in cognitive neuroscience. Psychol Bull 125, 826-859; Sussman, E., Winkler, I., 2001. Dynamic sensory updating in the auditory system. Brain Res. Cogn Brain Res. 12, 431-439] and the adaptation hypothesis [May, P., Tiitinen, H., Ilmoniemi, R.J., Nyman, G., Taylor, J.G., Näätänen, R., 1999. Frequency change detection in human auditory cortex. J. Comput. Neurosci. 6, 99-120; Jääskeläinen, I.P., Ahveninen, J., Bonmassar, G., Dale, A.M., Ilmoniemi, R.J., Levänen, S., Lin, F.H., May, P., Melcher, J., Stufflebeam, S., Tiitinen, H., Belliveau, J.W., 2004. Human posterior auditory cortex gates novel sounds to consciousness. Proc. Natl. Acad. Sci. U. S. A. 101, 6809-6814].
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Affiliation(s)
- Marta I Garrido
- Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, UK.
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242
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Pulvermüller F, Shtyrov Y. Spatiotemporal signatures of large-scale synfire chains for speech processing as revealed by MEG. Cereb Cortex 2008; 19:79-88. [PMID: 18460449 PMCID: PMC2638748 DOI: 10.1093/cercor/bhn060] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report a new brain signature of memory trace activation in the human brain revealed by magnetoencephalography and distributed source localization. Spatiotemporal patterns of cortical activation can be picked up in the time course of source images underlying magnetic brain responses to speech and noise stimuli, especially the generators of the magnetic mismatch negativity. We found that acoustic signals perceived as speech elicited a well-defined spatiotemporal pattern of sequential activation of superior-temporal and inferior-frontal cortex, whereas the same identical stimuli, when perceived as noise, did not elicit temporally structured activation. Strength of local sources constituting large-scale spatiotemporal patterns reflected additional lexical and syntactic features of speech. Morphological processing of the critical sound as verb inflection led to particularly pronounced early left inferior-frontal activation, whereas the same sound functioning as inflectional affix of a noun activated superior-temporal cortex more strongly. We conclude that precisely timed spatiotemporal patterns involving specific cortical areas may represent a brain code of memory circuit activation. These spatiotemporal patterns are best explained in terms of synfire mechanisms linking neuronal populations in different cortical areas. The large-scale synfire chains appear to reflect the processing of stimuli together with the context-dependent perceptual and cognitive information bound to them.
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Kimura M, Katayama J, Murohashi H. Involvement of memory-comparison-based change detection in visual distraction. Psychophysiology 2008; 45:445-57. [DOI: 10.1111/j.1469-8986.2007.00640.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kiebel SJ, Garrido MI, Moran RJ, Friston KJ. Dynamic causal modelling for EEG and MEG. Cogn Neurodyn 2008; 2:121-36. [PMID: 19003479 PMCID: PMC2427062 DOI: 10.1007/s11571-008-9038-0] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2008] [Accepted: 02/28/2008] [Indexed: 11/05/2022] Open
Abstract
Dynamic Causal Modelling (DCM) is an approach first introduced for the analysis of functional magnetic resonance imaging (fMRI) to quantify effective connectivity between brain areas. Recently, this framework has been extended and established in the magneto/encephalography (M/EEG) domain. DCM for M/EEG entails the inversion a full spatiotemporal model of evoked responses, over multiple conditions. This model rests on a biophysical and neurobiological generative model for electrophysiological data. A generative model is a prescription of how data are generated. The inversion of a DCM provides conditional densities on the model parameters and, indeed on the model itself. These densities enable one to answer key questions about the underlying system. A DCM comprises two parts; one part describes the dynamics within and among neuronal sources, and the second describes how source dynamics generate data in the sensors, using the lead-field. The parameters of this spatiotemporal model are estimated using a single (iterative) Bayesian procedure. In this paper, we will motivate and describe the current DCM framework. Two examples show how the approach can be applied to M/EEG experiments.
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Affiliation(s)
- Stefan J Kiebel
- The Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, 12 Queen Square, London, WC1N 3AR, UK,
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Fisher DJ, Labelle A, Knott VJ. Auditory hallucinations and the mismatch negativity: processing speech and non-speech sounds in schizophrenia. Int J Psychophysiol 2008; 70:3-15. [PMID: 18511139 DOI: 10.1016/j.ijpsycho.2008.04.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2007] [Revised: 02/21/2008] [Accepted: 04/03/2008] [Indexed: 11/16/2022]
Abstract
BACKGROUND In line with emerging research strategies focusing on specific symptoms rather than global syndromes in psychiatric disorders, we examined the functional neural correlates of auditory verbal hallucinations (AHs) in schizophrenia. Recent neuroimaging and behavioural evidence suggest a reciprocal relationship between auditory cortex response to external sounds versus that induced by AHs. METHODS The mismatch negativity (MMN), a well established event-related potential (ERP) index of auditory cortex function, was assessed in 12 hallucinating patients (HP), 12 non-hallucinating patients (NP) and 12 healthy controls (HC). The primary endpoints, MMN amplitudes and latencies recorded from anterior and posterior scalp regions, were measured in response to non-phonetic and phonetic sounds. RESULTS While schizophrenia patients as a whole differed from HCs, no significant between-group differences were observed when patients were divided into hallucinated and non-hallucinated subgroups but, compared to NPs and HCs, whose MMN amplitudes were greatest in response to across phoneme change at frontal but not temporal sites, MMN amplitudes in HPs at frontal sites were not significantly different to any of the presented stimuli, while temporal MMNs in HPs were maximally sensitive to phonetic change. SIGNIFICANCE These findings demonstrate that auditory verbal hallucinations are associated with impaired pre-attentive processing of speech in fronto-temporal networks, which may involve defective attribution of significance that is sensitive to resource limitations. Overall, this research suggests that MMN may be a useful non-invasive tool for probing relationships between hallucinatory and neural states within schizophrenia and the manner in which auditory processing is altered in these afflicted patients.
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Affiliation(s)
- Derek J Fisher
- Department of Psychology/Institute of Neuroscience, Carleton University, Ottawa, Ontario, Canada.
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Tse CY, Penney TB. On the functional role of temporal and frontal cortex activation in passive detection of auditory deviance. Neuroimage 2008; 41:1462-70. [PMID: 18474433 DOI: 10.1016/j.neuroimage.2008.03.043] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2007] [Revised: 03/03/2008] [Accepted: 03/19/2008] [Indexed: 10/22/2022] Open
Abstract
The superior temporal cortex (STC) and inferior frontal cortex (IFC) are active during pre-attentive change detection. According to one influential model, the temporal cortex is responsible for memory trace comparison and the frontal cortex for attention switching. However, fMRI studies that used parametric designs revealed frontal cortex activity that is inconsistent with this model. In response, alternative accounts of frontal cortex activity, such as contrast enhancement and response inhibition, have been suggested. In this study, we measured the event related potential (ERP) and event related optical signal (EROS) responses elicited by pitch deviants in a parametric design. The ERP results revealed the typical modulation of mismatch negativity (MMN) amplitude by degree of deviance. The EROS results showed a similar modulation effect in the temporal cortex and a general temporal cortex followed by frontal cortex activation pattern. Interestingly, medium deviants elicited a greater frontal EROS response than did large or small deviants. Moreover, regression analyses showed that the EROS measures, specifically the linear trend in the temporal cortex and the inverse quadratic trend in the frontal cortex, correlated with the linear trend of the ERP MMN response. Taken together, these results indicate that 1) deviance magnitude modulates the brain activity elicited by pitch stimuli in the STC and IFC within the same time range as electrophysiological measures of passive deviance detection, 2) EROS measures of deviance detection are highly correlated with the ERP MMN, and 3) the functional relationship of STC and IFC is consistent with both the contrast enhancement and response inhibition accounts of IFC activity in passive deviance detection.
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Affiliation(s)
- Chun-Yu Tse
- Beckman Institute and Department of Psychology, The University of Illinois at Urbana Champaign, USA
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The effect of methylphenidate on auditory information processing in healthy volunteers: a combined EEG/MEG study. Psychopharmacology (Berl) 2008; 197:475-86. [PMID: 18264697 DOI: 10.1007/s00213-007-1065-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2007] [Accepted: 12/19/2007] [Indexed: 01/09/2023]
Abstract
INTRODUCTION The psychomotor stimulant methylphenidate (MPH) has been shown to improve attentional processes, reflected in behavioural measures such as vigilance, reaction time and visual attention tasks. The neural mechanisms of MPH action on sensory information processing, however, remain poorly understood. To the authors' knowledge, this present study is the first to investigate whether a single dose of MPH affects neural substrates of passive attention in healthy adults studied with simultaneous whole-head magnetoencephalography (MEG) and electroencephalography (EEG). METHODS Monaural left-ear auditory stimuli were presented in an oddball paradigm with infrequent deviant tones differing in frequency and duration. Neuronal activity was recorded with simultaneous whole-head MEG and EEG in 13 healthy subjects (five females; aged 27 +/- 5 years) after oral administration of 40 mg MPH or placebo in a randomised, double-blind, cross-over design. We analysed both electric and magnetic N100, P200 and mismatch negativity (MMN) components. RESULTS MPH increased arousal levels in visual analogue scales. MPH had no effect on the dipole strength of MMN or MMNm in either frequency or duration deviations. MPH did, however, reduce P200 amplitudes in EEG. CONCLUSIONS The lack of effect of MPH on either MMN or MMNm suggests no association between catecholaminergic activities and MMN generation. However, our findings imply that MPH may change the neural bases of auditory information processing such as the early stimulus evaluation reflected in the P200 component. Dopamine and noradrenaline neurotransmitter systems could be responsible for the modulation of these processes. The exclusive effect of MPH on the P200 component could have a clinical application.
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Abstract
Neurophysiological findings such as reduced amplitudes of the P300 potential in patients with schizophrenia are among the most robust findings in biological psychiatry. An enormous literature with findings of abnormal central processing in psychiatric diseases has been acquired during the last decades. However, the benefit of this research has been limited in part due to the unresolved problem of precise and correct localization of the underlying neural generators. The difficulty of correct localization is due to the fact that different constellations of cortical neuroelectric generators can produce identical EEG activity. Therefore, even concerning several major event related potentials no generally accepted knowledge about their cerebral generation exists. While correct localization can easily be obtained by imaging methods based on hemodynamic changes such as functional magnetic resonance imaging (fMRI), these techniques can not distinguish between different aspects of neural activity such as oscillation modes or stages of information processing that are only some milliseconds apart. Accordingly, the integration of simultaneous measurements of EEG and fMRI has become a methodological key issue today. EEG-fMRI may prove to be crucial in providing much deeper understanding of brain activity over the next decades. This review summarizes the basic physiology, methodological issues and interesting applications in psychiatry.
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Acute high-dose glycine attenuates mismatch negativity (MMN) in healthy human controls. Psychopharmacology (Berl) 2008; 196:451-60. [PMID: 17952411 DOI: 10.1007/s00213-007-0976-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Accepted: 10/03/2007] [Indexed: 10/22/2022]
Abstract
RATIONALE Schizophrenia is commonly associated with impairments in pre-attentive change detection as represented by reduced mismatch negativity (MMN). The neurochemical basis of MMN has been linked to N-methyl-D: -aspartate (NMDA) receptor function. Glycine augments NMDA receptor function via stimulation of the glycine modulatory site of the NMDA receptor and has been shown to effectively reduce negative symptoms in schizophrenia. However, no study has investigated the possible effects of high-dose glycine on MMN. Further, the physiological consequences of administering high-dose glycine in subjects with normal NMDA receptor function are unknown. OBJECTIVES The aim of the present project was to investigate the acute effects of a single large dose of glycine on the human MMN in healthy subjects. MATERIALS AND METHODS Sixteen healthy male subjects participated in a double blind, placebo-controlled, crossover design in which each subject was tested under two acute treatment conditions separated by a 1-week washout period; placebo and 0.8 g/kg glycine. The subjects were exposed to a duration-MMN paradigm with 50-ms standard tones (91%) and 100-ms deviant tones (9%). RESULTS The results showed that glycine significantly attenuated duration MMN amplitude at frontal electrodes. There was no effect of glycine on MMN latencies or on amplitudes or latencies of N1, N2 and P3a. CONCLUSIONS These findings suggest that an acute high dosage of glycine attenuates MMN in healthy controls, raising the possibility that optimal effects of glycine and other glycine agonists may depend on the integrity of the NMDA receptor system.
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