Global ETD Search
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Showing 1 to 16 of 16 for “"Mismatch Negativity (MMN)"”.
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Mismatch Negativity as a Marker of Auditory Pattern Separation Integrity in Aging
… in aging? This study examined how the mismatch negativity (MMN), an electrophysiological marker of change detection and encoding, relates to age differences in mnemonic discrimination. The MMN was recorded from 33 young (18–32 years, 18 females) and 30 older (55–86 years, 14 females) …
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Generation of mismatch negativity in a sample of treatment-resistant schizophrenia patients
Mismatch negativity (MMN) was recorded in thirteen treatment-resistant schizophrenic patients and age- and gender-matched fourteen healthy controls. The MMN was obtained by subtracting the standard from the deviant event-related potential (ERP) brain wave. Subjects responded to infrequent visual …
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Brain plasticity in speech training in native English speakers learning mandarin tones
… of the Mandarin lexical tones. Analysis of the Mismatch Negativity (MMN) responses in the ERP data revealed increased amplitude and decreased latency for pre-attentive processing of across-category discrimination as a result of training. There were also laterality changes in the MMN responses to …
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Erklärung von Rechtschreibleistungen durch phonologische und auditiv-sensorische Informationsverarbeitungskompetenzen: Eine Untersuchung mit lese-/rechtschreibgestörten Kindern
… hatte zum Ziel, eine zukünftige Nutzbarkeit des MMN-Paradigmas als physiologisches Frühdiagnostikum der Lese-/Rechtschreibschwäche zu prüfen. Zu diesem Zweck wurden Indikatoren der auditiv-sensorischen Verarbeitung (EEG-Paradigma der Mismatch Negativity; MMN) und Indikatoren der phonologischen …
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Automatic Processing of Musical and Phonemic Sounds: Differences Between Musicians and Nonmusicians
… EEG was recorded during each condition. The mismatch negativity (MMN) was identified by subtracting ERPs to standard auditory stimuli from ERPs to deviant auditory stimuli for each of the four qualitatively different conditions. Superior preattentive auditory processing in musicians was found …
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The Interaction of Intensity and Deviance on Auditory Event-Related Potentials: Findings Using Principal Component Analysis (PCA) of Current Source Densities (CSDs)
<p>Mismatch negativity (MMN) studies provide insights into the brain's ability to perceive and/or detect deviations from established sensory patterns. Clinical studies investigating the loudness-dependency of auditory evoked potential (LDAEP) have shown a relationship between the intensity of an …
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Electrophysiological Markers of Sensory Plasticity and Connectomics in Ageing and Mild Cognitive Impairment
… an index of Hebbian plasticity, and the roving Mismatch Negativity (MMN), as an index of Predictive Coding. In addressing aim 1, the modulation of effective connectivity induced by these paradigms was compared. Consistent with their respective learning models, the MMN was associated with a …
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Using EEG to investigate premature aging and cognitive decline in adults with Down's Syndrome
… the following event-related potentials (ERPs): mismatch negativity (MMN) and P300 (P3a and P3b), were chosen for exploration with cross-sectional and longitudinal investigations. The thesis begins by exploring how the ERPs differ for a cross-section of 36 adults with DS and 39 age- and …
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Maturation of Speech Discrimination and Attentional Requirements in Late Childhood
… (ERP) measures, with a particular focus on mismatch negativity (MMN) - a developmentally-sensitive index of automatic speech discrimination.</p> <p>The first experiment focused on children ages 6.0-11.9 years old, comparing the MMN responses elicited by English vowel contrasts under …
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Understanding language and attention: brain-based model and neurophysiological experiments
… on the other, the more recent results on the Mismatch Negativity (MMN, latency 100-250ms), an early automatic brain response elicited under distraction which is larger to words than to pseudowords. We asked what the mechanisms underlying these differential neurophysiological responses may be, …
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Influence of a Nicotinic Treatment on Auditory Sensory Processing in Schizophrenia
… salient (deviant) stimuli, as measured by the mismatch negativity (MMN) ERP. Acknowledging the baseline-dependent effects of nicotine, each of the four investigations assessed the role of inter-individual differences in response to the cholinergic treatment by adopting a baseline median-split …
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An exploration of pre-attentive visual discrimination using event-related potentials
The Mismatch Negativity (MMN) has been characterised as a ‘pre-attentive’ component of an Event-Related Potential (ERP) that is related to discriminatory processes. Although well established in the auditory domain, characteristics of the MMN are less well characterised in the visual domain. The …
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Musical Expertise and rhythm processing
… correlates of auditory deviance violation (Mismatch Negativity – MMN and Middle Latency Responses - MLRs), by inserting deviant stimuli in rhythmical (at strong and weak metrical positions) and non-rhythmical structures. Deviant stimuli within rhythmical structures elicited larger MMN …
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Who is that talking? Function and dysfunction of efference copy and corollary discharge in healthy people and schizophrenic patients
… foreknowledge, subjects reacted with large a Mismatch Negativity (MMN). If subjects were notified of the upcoming pitch-shift, however, the MMN was considerably reduced. If subjects were passively listening, predictability did not influence the size of the MMN. Schizophrenic patients did not …
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From deviance to meaning: frontal temporal interaction in the processing of unexpected events
Made available in DSpace on 2010-08-20T17:55:36Z (GMT). No. of bitstreams: 3 Tse_Chun-Yu.pdf: 1963022 bytes, checksum: fbcba902818f710289660e61810a279b (MD5) 1_Tse_Chun-Yu.pdf: 1959077 bytes, checksum: 442356782e9d5df63949e11772c7355b (MD5) license.txt: 4055 bytes, checksum: …