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https://www.readbyqxmd.com/read/28536477/reduced-mismatch-negativity-is-associated-with-increased-plasma-level-of-glutamate-in-first-episode-psychosis
#1
Tatsuya Nagai, Kenji Kirihara, Mariko Tada, Daisuke Koshiyama, Shinsuke Koike, Motomu Suga, Tsuyoshi Araki, Kenji Hashimoto, Kiyoto Kasai
Reduced amplitude of mismatch negativity (MMN) is one of the more promising biological markers of schizophrenia. This finding holds true in both early and chronic phases of the disorder, and is compatible with the glutamatergic dysfunction hypothesis. To further establish MMN as a biomarker of aberrant glutamatergic neurotransmission, an exploration for an association with blood levels of glutamatergic amino acids is an important next step. Despite a large body of work investigating MMN in schizophrenia, no previous studies have undertaken this endeavor...
May 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28532686/mismatch-negativity-mmn-to-spatial-deviants-and-behavioral-spatial-discrimination-ability-in-the-etiology-of-auditory-verbal-hallucinations-and-thought-disorder-in-schizophrenia
#2
Megan A Perrin, Joshua T Kantrowitz, Gail Silipo, Elisa Dias, Omar Jabado, Daniel C Javitt
Persistent auditory verbal hallucinations (AVH) in schizophrenia are increasingly tied to dysfunction at the level of auditory cortex. AVH may reflect in part misattribution of internally generated thoughts to external spatial locations. Here, we investigated the association between persistent AVH and spatial localization abilities assessed both behaviorally and by mismatch negativity (MMN) to location deviants. METHODS: Spatial- and tonal- discrimination abilities were assessed in patients (n=20) and controls (n=20) using free-field tones...
May 19, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28523213/brachial-plexus-magnetic-resonance-imaging-differentiates-between-inflammatory-neuropathies-and-does-not-predict-disease-course
#3
Bas A Jongbloed, Jeroen W Bos, Dirk Rutgers, Willem Ludo van der Pol, Leonard H van den Berg
OBJECTIVE: The main objective of this study was to evaluate the correlation between the distribution of brachial plexus magnetic resonance imaging (MRI) abnormalities and clinical weakness, and to evaluate the value of brachial plexus MRI in predicting disease course and response to treatment in multifocal motor neuropathy (MMN), Lewis-Sumner syndrome (LSS) and chronic inflammatory demyelinating polyradiculoneuropathy (CIDP). METHODS: Sixty-seven patients with an inflammatory neuropathy diagnosed at our tertiary referral center for neuromuscular diseases had undergone bilateral T2-weighted short tau inversion recovery (STIR) MRI of the brachial plexus...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28521155/is-laughter-a-better-vocal-change-detector-than-a-growl
#4
Ana P Pinheiro, Carla Barros, Margarida Vasconcelos, Christian Obermeier, Sonja A Kotz
The capacity to predict what should happen next and to minimize any discrepancy between an expected and an actual sensory input (prediction error) is a central aspect of perception. Particularly in vocal communication, the effective prediction of an auditory input that informs the listener about the emotionality of a speaker is critical. What is currently unknown is how the perceived valence of an emotional vocalization affects the capacity to predict and detect a change in the auditory input. This question was probed in a combined event-related potential (ERP) and time-frequency analysis approach...
April 11, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28516227/impairment-in-mismatch-negativity-but-not-repetition-suppression-in-schizophrenia
#5
Brian A Coffman, Sarah M Haigh, Tim K Murphy, Dean F Salisbury
Schizophrenia is characterized by impaired auditory-evoked potentials (AEPs), mismatch negativity (MMN), and sensory gating of AEPs to repeated stimuli (repetition suppression, RS). In the predictive modeling framework, MMN and RS reflect encoding of prediction error and model sharpening, respectively. We compared P50, N100, P200 RS, and pitch and duration MMN in 26 participants diagnosed with schizophrenia (SZ) and 26 matched healthy controls (HC), and assessed relationships between MMN, RS, and SZ diagnosis...
May 17, 2017: Brain Topography
https://www.readbyqxmd.com/read/28515164/mrna-levels-of-placental-iron-and-zinc-transporter-genes-are-upregulated-in-gambian-women-with-low-iron-and-zinc-status
#6
Modou Lamin Jobarteh, Harry J McArdle, Grietje Holtrop, Ebrima A Sise, Andrew M Prentice, Sophie E Moore
Background: The role of the placenta in regulating micronutrient transport in response to maternal status is poorly understood.Objective: We investigated the effect of prenatal nutritional supplementation on the regulation of placental iron and zinc transport.Methods: In a randomized trial in rural Gambia [ENID (Early Nutrition and Immune Development)], pregnant women were allocated to 1 of 4 nutritional intervention arms: 1) iron and folic acid (FeFol) tablets (FeFol group); 2) multiple micronutrient (MMN) tablets (MMN group); 3) protein energy (PE) as a lipid-based nutrient supplement (LNS; PE group); and 4) PE and MMN (PE+MMN group) as LNS...
May 17, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28511977/role-of-acetylcholine-and-serotonin-in-novelty-processing-using-an-oddball-paradigm
#7
S Caldenhove, L G J M Borghans, A Blokland, A Sambeth
The processing of novel stimuli is known to take place in the hippocampus and frontal cortex, and is influenced by the cholinergic system. This ability is crucial to help detect changes in the environment and adapt behavior accordingly. Previous research has shown that acetylcholine (ACh) can interact with serotonin (5-HT) at the hippocampal level, which may have consequences for cognitive functioning. However, little is known about the exact nature of this ACh and 5-HT interaction as well their possible interactive effects on novelty processing...
May 13, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28506807/phoneme-processing-skills-are-reflected-in-children-s-mmn-responses
#8
Tanja Linnavalli, Vesa Putkinen, Minna Huotilainen, Mari Tervaniemi
Phonological awareness (PA), the core contributor in phoneme processing abilities, has a link to later reading skills in children. However, the associations between PA and neural auditory discrimination are not clear. We used event-related potential (ERP) methodology and neuropsychological testing to monitor the neurocognitive basis of phonological awareness in typically developing children. We measured 5-6-year-old children's (N=70) phoneme processing, word completion and perceptual reasoning skills and compared their test results to their brain responses to phonemic changes, separately for each test...
May 12, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28506707/complex-mismatch-negativity-to-tone-pair-deviants-in-long-term-schizophrenia-and-in-the-first-episode-schizophrenia-spectrum
#9
Dean F Salisbury, Alexis G McCathern, Brian A Coffman, Timothy K Murphy, Sarah M Haigh
Mismatch negativity (MMN) is an event-related potential to stimulus change. MMN to infrequent deviant tones that differs in a simple physical parameter from repetitive standard tones is reduced in patients with long-term schizophrenia (Sz; d=~1). However, this simple MMN is not uniformly reduced at the first-episode of schizophrenia-spectrum psychosis (FESz; d<0.1 for pitch; <0.4 for duration). Deviant stimuli that violate pattern rules also evoke MMN. This complex MMN is evoked by deviations in the relation of sounds to each other...
May 12, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28504196/human-subthalamic-nucleus-automatic-auditory-change-detection-as-a-basis-for-action-selection
#10
Marcus Heldmann, Thomas F Münte, Lejla Paracka, Frederike Beyer, Norbert Brüggemann, Assel Saryyeva, Dirk Rasche, Joachim K Krauss, Volker M Tronnier
The subthalamic nucleus (STN) shapes motor behavior and is important for the initiation and termination of movements. Here we ask whether the STN takes aggregated sensory information into account, in order to exert this function. To this end, local field potentials (LFP) were recorded in eight patients suffering from Parkinson's disease and receiving deep-brain stimulation of the STN bilaterally. Bipolar recordings were obtained postoperatively from the externalized electrode leads. Patients were passively exposed to trains of auditory stimuli containing global deviants, local deviants or combined global/local deviants...
May 11, 2017: Neuroscience
https://www.readbyqxmd.com/read/28504120/mismatch-negativity-mmn-to-speech-sounds-is-modulated-systematically-by-manual-grip-execution
#11
Mikko Tiainen, Kaisa Tiippana, Petri Paavilainen, Martti Vainio, Lari Vainio
Manual actions and speech are connected: for example, grip execution can influence simultaneous vocalizations and vice versa. Our previous studies show that the consonant [k] is associated with the power grip and the consonant [t] with the precision grip. Here we studied whether the interaction between speech sounds and grips could operate already at a pre-attentive stage of auditory processing, reflected by the mismatch-negativity (MMN) component of the event-related potential (ERP). Participants executed power and precision grips according to visual cues while listening to syllable sequences consisting of [ke] and [te] utterances...
May 11, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28501655/changes-of-auditory-event-related-potentials-in-ovariectomized-rats-injected-with-d-galactose-protective-role-of-rosmarinic-acid
#12
Deniz Kantar Gok, Enis Hidisoglu, Hakan Er, Alev Duygu Acun, Yusuf Olgar, Piraye Yargıcoglu
Rosmarinic acid (RA), which has multiple bioactive properties, might be a useful agent for protecting central nervous system against age related alterations. In this context, the purpose of the present study was to investigate possible protective effects of RA on mismatch negativity (MMN) component of auditory event-related potentials (AERPs) as an indicator of auditory discrimination and echoic memory in the ovariectomized (OVX) rats injected with D-galactose combined with neurochemical and histological analyses...
May 10, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28499839/does-emotion-change-auditory-prediction-and-deviance-detection
#13
Ana P Pinheiro, Carla Barros, Marcelo Dias, Margaret Niznikiewicz
In the last decades, a growing number of studies provided compelling evidence supporting the interplay of cognitive and affective processes. However, it remains to be clarified whether and how an emotional context affects the prediction and detection of change in unattended sensory events. In an event-related potential (ERP) study, we probed the modulatory role of pleasant, unpleasant and neutral visual contexts on the brain response to automatic detection of change in spectral (intensity) vs. temporal (duration) sound features...
May 9, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28490515/the-effect-of-oral-iron-with-or-without-multiple-micronutrients-on-hemoglobin-concentration-and-hemoglobin-response-among-nonpregnant-cambodian-women-of-reproductive-age-a-2-x-2-factorial-double-blind-randomized-controlled-supplementation-trial
#14
Crystal D Karakochuk, Mikaela K Barker, Kyly C Whitfield, Susan I Barr, Suzanne M Vercauteren, Angela M Devlin, Jennifer A Hutcheon, Lisa A Houghton, Sophonneary Prak, Kroeun Hou, Tze Lin Chai, Ame Stormer, Sokhoing Ly, Robyn Devenish, Christian Oberkanins, Helene Pühringer, Kimberly B Harding, Luz M De-Regil, Klaus Kraemer, Tim J Green
Background: Despite a high prevalence of anemia among nonpregnant Cambodian women, current reports suggest that iron deficiency (ID) prevalence is low. If true, iron supplementation will not be an effective anemia reduction strategy.Objective: We measured the effect of daily oral iron with or without multiple micronutrients (MMNs) on hemoglobin concentration in nonpregnant Cambodian women screened as anemic.Design: In this 2 × 2 factorial, double-blind, randomized trial, nonpregnant women (aged 18-45 y) with hemoglobin concentrations ≤117 g/L (capillary blood) were recruited from 26 villages in Kampong Chhnang province and randomly assigned to receive 12 wk of iron (60 mg; Fe group), MMNs (14 other micronutrients; MMN group), iron plus MMNs (Fe+MMN group), or placebo capsules...
May 10, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28472219/effects-of-prenatal-micronutrients-supplementation-on-spontaneous-preterm-birth-double-blind-randomized-controlled-trial-in-china
#15
Zhiwen Li, Zuguo Mei, Le Zhang, Hongtian Li, Yali Zhang, Nan Li, Rongwei Ye, Aiguo Ren, Jian-Meng Liu, Mary K Serdula
In this secondary analysis of a double-blind randomized controlled trial in northern China, we aim to assess the effect of multiple micronutrients (MMN) or iron-folic acid (IFA) vs. folic acid alone (FA) on spontaneous preterm birth(SPB), and the impact of supplementation timing on SPB. 18,775 nulliparous pregnant women enrolled between 2006 and 2009 were randomly assigned to receive daily FA, IFA, or MMN from before 20 gestational weeks until delivery. The incidence of SPB for women consuming FA, IFA and MMN was 5...
May 4, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28472146/how-regularity-representations-of-short-sound-patterns-that-are-based-on-relative-or-absolute-pitch-information-establish-over-time-an-eeg-study
#16
Maria Bader, Erich Schröger, Sabine Grimm
The recognition of sound patterns in speech or music (e.g., a melody that is played in different keys) requires knowledge about pitch relations between successive sounds. We investigated the formation of regularity representations for sound patterns in an event-related potential (ERP) study. A pattern, which consisted of six concatenated 50 ms tone segments differing in fundamental frequency, was presented 1, 2, 3, 6, or 12 times and then replaced by another pattern by randomly changing the pitch of the tonal segments (roving standard paradigm)...
2017: PloS One
https://www.readbyqxmd.com/read/28461101/brain-source-localization-of-mmn-and-p300-erps-in-mild-cognitive-impairment-and-alzheimer-s-disease-a-high-density-eeg-approach
#17
Anthoula C Tsolaki, Vasiliki Kosmidou, Ioannis Yiannis Kompatsiaris, Chrysa Papadaniil, Leontios Hadjileontiadis, Aikaterini Adam, Magda Tsolaki
Alzheimer's disease is the most common neurodegenerative disease of Western societies, suggesting the need for early diagnosis, even in preclinical stages. In this vein, the localization of neuronal generators of event-related potential (ERP) components, that is, the mismatch negativity and the P300, based on high-density electroencephalogram data, was explored as a means to enhance their sensitivity as markers of preclinical Alzheimer's disease (AD). A 2-tone oddball experiment was conducted, involving 21 healthy elderly, 21 mild cognitive impairment, and 21 mild AD patients, while high-density electroencephalogram data were recorded...
March 29, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28460035/music-induced-positive-mood-broadens-the-scope-of-auditory-attention
#18
Vesa Putkinen, Tommi Makkonen, Tuomas Eerola
Previous studies indicate that positive mood broadens the scope of visual attention, which can manifest as heightened distractibility. We used event-related potentials (ERP) to investigate whether music-induced positive mood has comparable effects on selective attention in the auditory domain. Subjects listened to experimenter-selected happy, neutral or sad instrumental music and afterwards participated in a dichotic listening task. Distractor sounds in the unattended channel elicited responses related to early sound encoding (N1/MMN) and bottom-up attention capture (P3a) while target sounds in the attended channel elicited a response related to top-down-controlled processing of task-relevant stimuli (P3b)...
April 27, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28457774/sensory-prediction-errors-in-the-continuum-of-psychosis
#19
R Randeniya, L K L Oestreich, M I Garrido
Sensory prediction errors are fundamental brain responses that signal a violation of expectation in either the internal or external sensory environment, and are therefore crucial for survival and adaptive behaviour. Patients with schizophrenia show deficits in these internal and external sensory prediction errors, which can be measured using electroencephalography (EEG) components such as N1 and mismatch negativity (MMN), respectively. New evidence suggests that these deficits in sensory prediction errors are more widely distributed on a continuum of psychosis, whereas psychotic experiences exist to varying degrees throughout the general population...
April 27, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28450056/mismatch-negativity-in-bipolar-disorder-a-neurophysiological-biomarker-of-intermediate-effect
#20
Daniel F Hermens, Kate M Chitty, Manreena Kaur
The event-related potential, mismatch negativity (MMN), has been touted as a robust and specific neurophysiological biomarker of schizophrenia. Earlier studies often included bipolar disorder (BD) as a clinical comparator and reported that MMN was significantly impaired only in schizophrenia. However, with the increasing number of MMN studies of BD (with larger sample sizes), the literature is now providing somewhat consistent evidence of this biomarker also being perturbed in BD, albeit to a lesser degree than that observed in schizophrenia...
April 24, 2017: Schizophrenia Research
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