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https://www.readbyqxmd.com/read/29769152/startle-habituation-sensory-and-sensorimotor-gating-in-trauma-affected-refugees-with-posttraumatic-stress-disorder
#1
Hanieh Meteran, Erik Vindbjerg, Sigurd Wiingaard Uldall, Birte Glenthøj, Jessica Carlsson, Bob Oranje
BACKGROUND: Impairments in mechanisms underlying early information processing have been reported in posttraumatic stress disorder (PTSD); however, findings in the existing literature are inconsistent. This current study capitalizes on technological advancements of research on electroencephalographic event-related potential and applies it to a novel PTSD population consisting of trauma-affected refugees. METHODS: A total of 25 trauma-affected refugees with PTSD and 20 healthy refugee controls matched on age, gender, and country of origin completed the study...
May 17, 2018: Psychological Medicine
https://www.readbyqxmd.com/read/29759942/tms-evoked-n100-reflects-local-gaba-and-glutamate-balance
#2
Xiaoming Du, Laura M Rowland, Ann Summerfelt, Andrea Wijtenburg, Joshua Chiappelli, Krista Wisner, Peter Kochunov, Fow-Sen Choa, L Elliot Hong
BACKGROUND: Animal studies suggest that synchronized electrical activities in the brain are regulated by the primary inhibitory and excitatory neurotransmitters gamma-aminobutyric acid (GABA) and glutamate, respectively. Identifying direct evidence that this same basic chemical-electrical neuroscience principle operates in the human brains is critical for translation of neuroscience to pathological research. OBJECTIVE/HYPOTHESIS: We hypothesize that the background neurochemical concentrations may affect the cortical excitability probed by transcranial magnetic stimulation (TMS)...
May 4, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29742032/modulation-of-motor-cortical-excitability-with-auditory-stimulation
#3
Olli Löfberg, Petro Julkunen, Elisa Kallioniemi, Ari Pääkkönen, Jari Karhu
Loud sounds have been demonstrated to increase motor cortex excitability when transcranial magnetic stimulation (TMS) is synchronized with auditory evoked N100 potential measured from electroencephalography (EEG). The N100 potential is generated by an afferent response to sound onset and feature analysis, and upon novel sound it is also related to the arousal reaction. Arousal reaction is known to originate from the ascending reticular activating system of the brainstem and to modulate neuronal activity throughout the central nervous system...
May 9, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29741056/-effects-of-different-nitrogen-application-rates-on-15-n-urea-absorption-utilization-loss-and-fruit-yield-and-quality-of-dwarf-apple
#4
Qian Chen, Ning Ding, Ling Peng, Shun Feng Ge, Yuan Mao Jiang
Seven-year-old 'Yanfu3'/M26 /M. hupehensis Rehd. seedlings and 15 N trace technique were used to explore the characteristics of 15 N-urea absorption, utilization, loss and fruit yield and quality under different nitrogen application rates (N100 , N200 and N300 ). The main results were as follows: the plant growth, 15 N absorption, utilization and loss differed significantly under different treatments. The plant leaf chlorophyll content (SPAD value), photosynthetic rate (Pn ), total N content of leaves and the biomass, as well as the root-shoot ratio of N200 treatment were obviously higher than the N100 and N300 treatments...
July 18, 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29625151/1-ma-cathodal-tdcs-shows-excitatory-effects-in-children-and-adolescents-insights-from-tms-evoked-n100-potential
#5
Vera Moliadze, Ekaterina Lyzhko, Till Schmanke, Saskia Andreas, Christine M Freitag, Michael Siniatchkin
In children and adolescents, 1 mA transcranial direct current stimulation (tDCS) may cause "paradoxical" effects compared with adults: both 1 mA anodal and cathodal tDCS increase amplitude of the motor evoked potential (MEP) as revealed by a single pulse transcranial magnetic stimulation (TMS) of the motor cortex. Here, EEG based evoked potentials induced by a single pulse TMS, particularly the N100 component as marker of motor cortex inhibition, were investigated in order to explain effects of tDCS on the developing brain...
April 3, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29604322/state-or-trait-auditory-event-related-potentials-in-adolescents-with-current-and-remitted-major-depression
#6
Lisa Feldmann, Charlotte E Piechaczek, Verena Pehl, Jürgen Bartling, Sarolta Bakos, Gerd Schulte-Körne, Ellen Greimel
OBJECTIVE: Event-related potential (ERP) studies have revealed abnormal neurophysiological patterns underlying selective attention in patients with Major Depression (MD). Only few included both patients in acute and remitted state to address the question whether these abnormalities are state- or trait- dependent and none focused on adolescent MD. Thus, the aim of our study was to address this question in an adolescent sample. METHODS: 22 adolescents with acute MD, 20 adolescents with remitted MD (rMD) and 32 healthy controls (HC) performed a standard two-tone auditory oddball task while ERPs (N100, P200, N200, P300) were collected...
March 28, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29596956/individual-differences-in-infants-neural-responses-to-their-peers-cry-and-laughter
#7
Maria Magdalena Crespo-Llado, Ross E Vanderwert, Elena Geangu
Infants' ability to process others' emotional expressions is fundamental for their social development. While infants' processing of emotions expressed by faces and speech has been more extensively investigated, less is known about how infants process non-verbal vocalizations of emotions. Here, we recorded frontal N100, P200, and LPC event-related potentials (ERPs) from 8-month-old infants listening to sounds of other infants crying, laughing, and coughing. Infants' temperament was measured via parental report...
March 26, 2018: Biological Psychology
https://www.readbyqxmd.com/read/29572124/short-interval-and-long-interval-intracortical-inhibition-of-tms-evoked-eeg-potentials
#8
Isabella Premoli, Julia Király, Florian Müller-Dahlhaus, Carl M Zipser, Pierre Rossini, Christoph Zrenner, Ulf Ziemann, Paolo Belardinelli
BACKGROUND: Inhibition in the human motor cortex can be probed by means of paired-pulse transcranial magnetic stimulation (ppTMS) at interstimulus intervals of 2-3 ms (short-interval intracortical inhibition, SICI) or ∼100 ms (long-interval intracortical inhibition, LICI). Conventionally, SICI and LICI are recorded as motor evoked potential (MEP) inhibition in the hand muscle. Pharmacological experiments indicate that they are mediated by GABAA and GABAB receptors, respectively. OBJECTIVE/HYPOTHESIS: SICI and LICI of TMS-evoked EEG potentials (TEPs) and their pharmacological properties have not been systematically studied...
March 15, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29569473/neurofeedback-based-enhancement-of-single-trial-auditory-evoked-potentials-treatment-of-auditory-verbal-hallucinations-in-schizophrenia
#9
Kathryn Rieger, Marie-Helene Rarra, Laura Diaz Hernandez, Daniela Hubl, Thomas Koenig
Auditory verbal hallucinations depend on a broad neurobiological network ranging from the auditory system to language as well as memory-related processes. As part of this, the auditory N100 event-related potential (ERP) component is attenuated in patients with schizophrenia, with stronger attenuation occurring during auditory verbal hallucinations. Changes in the N100 component assumingly reflect disturbed responsiveness of the auditory system toward external stimuli in schizophrenia. With this premise, we investigated the therapeutic utility of neurofeedback training to modulate the auditory-evoked N100 component in patients with schizophrenia and associated auditory verbal hallucinations...
March 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29564028/dancers-and-fastball-sports-athletes-have-different-spatial-visual-attention-styles
#10
Ummuhan Isoglu-Alkac, M Numan Ermutlu, Gökçer Eskikurt, İlker Yücesir, Sernaz Demirel Temel, Tan Temel
Physical exercise and the training effects of repeated practice of skills over an extended period of time may have additive effects on brain networks and functions. Various motor skills and attentional styles can be developed by athletes engaged in different sports. In this study, the effects of fast ball sports and dance training on attention were investigated by event related potentials (ERP). ERP were recorded in auditory and visual tasks in professional dancer, professional fast ball sports athlete (FBSA) and healthy control volunteer groups consisting of twelve subjects each...
April 2018: Cognitive Neurodynamics
https://www.readbyqxmd.com/read/29528297/opposing-effects-of-cannabis-use-on-late-auditory-repetition-suppression-in-schizophrenia-patients-and-healthy-control-subjects
#11
Johannes Rentzsch, Golo Kronenberg, Ada Stadtmann, Andres Neuhaus, Christiane Montag, Rainer Hellweg, Maria Christiane Jockers-Scherübl
BACKGROUND: Chronic cannabis use may cause neurocognitive deficits and increase the risk of psychosis. Nevertheless, the effects of cannabis use on neurocognitive functioning in schizophrenia have remained largely unspecified. METHODS: Here, we studied repetition suppression of auditory event-related responses in a paired-stimulus design in a mixed sample of schizophrenia patients (n = 34) and healthy control subjects (n = 45) with chronic heavy cannabis use and schizophrenia patients (n = 33) and healthy control subjects (n = 61) without cannabis use...
April 2017: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
https://www.readbyqxmd.com/read/29467392/alcohol-impairs-n100-response-to-dorsolateral-prefrontal-cortex-stimulation
#12
Genane Loheswaran, Mera S Barr, Reza Zomorrodi, Tarek K Rajji, Daniel M Blumberger, Bernard Le Foll, Zafiris J Daskalakis
Alcohol is thought to exert its effect by acting on gamma-aminobutyric (GABA) inhibitory neurotransmission. The N100, the negative peak on electroencephalography (EEG) that occurs approximately 100 ms following the transcranial magnetic stimulation (TMS) pulse, is believed to represent GABAB receptor mediated neurotransmission. However, no studies have examined the effect of alcohol on the N100 response to TMS stimulation of the dorsolateral prefrontal cortex (DLPFC). In the present study, we aimed to explore the effect of alcohol on the DLPFC TMS-evoked N100 response...
February 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29434783/the-application-of-nalbuphine-in-patient-controlled-intravenous-analgesia-for-patients-undergoing-subtotal-gastrectomy
#13
Li Yang, Jinjing Wu, Tao Li
The aim of the present study was to investigate the analgesic effect and safety of the application of different doses of nalbuphine in patient-controlled intravenous analgesia (PCIA) for patients undergoing subtotal gastrectomy. A total of 120 patients, who underwent subtotal gastrectomy at our hospital between May, 2015 and January, 2017 under combined spinal epidural combined anesthesia, were selected. The patients received PCIA after surgery. The patients were randomly divided into four groups, including the morphine (MOP group), nalbuphine 60 mg (N60 group), nalbuphine 80 mg (N80 group) and nalbuphine 100 mg (N100 group)...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29407789/association-of-the-n100-tms-evoked-potential-with-attentional-processes-a-motor-cortex-tms-eeg-study
#14
Outi Kaarre, Marja Äikiä, Elisa Kallioniemi, Mervi Könönen, Virve Kekkonen, Noora Heikkinen, Petri Kivimäki, Tommi Tolmunen, Sara Määttä, Eila Laukkanen
The most thoroughly studied transcranial magnetic stimulation (TMS)-evoked electroencephalogram (EEG) potential (TEP), N100, is often defined as a measure of cortical inhibition. We explored the association of the N100 amplitude with attention in 51 young healthy adults. Navigated TMS with simultaneous EEG registering was applied over the left primary motor cortex at the intensity of 110% of the resting motor threshold. Attention was assessed with the Paced Auditory Serial Addition Test (PASAT). We found a negative Pearson correlation (p = ...
April 2018: Brain and Cognition
https://www.readbyqxmd.com/read/29382210/event-related-potentials-in-the-clinical-high-risk-chr-state-for-psychosis-a-systematic-review
#15
Jennifer R Lepock, Romina Mizrahi, Michele Korostil, R Michael Bagby, Elizabeth W Pang, Michael Kiang
There is emerging evidence that identification and treatment of individuals in the prodromal or clinical high-risk (CHR) state for psychosis can reduce the probability that they will develop a psychotic disorder. Event-related brain potentials (ERPs) are a noninvasive neurophysiological technique that holds promise for improving our understanding of neurocognitive processes underlying the CHR state. We aimed to systematically review the current literature on cognitive ERP studies of the CHR population, in order to summarize and synthesize the results, and their implications for our understanding of the CHR state...
January 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29352668/the-effect-of-single-and-repeated-prefrontal-intermittent-theta-burst-stimulation-on-cortical-reactivity-and-working-memory
#16
Sung Wook Chung, Nigel C Rogasch, Kate E Hoy, Paul B Fitzgerald
BACKGROUND: With an increasing interest in the use of theta burst stimulation (TBS) as a cognitive enhancer and a potential therapeutic tool for psychiatric disorders, there is a need to identify optimal parameters of TBS in the prefrontal cortex. OBJECTIVE/HYPOTHESIS: This study examined the effect of two blocks of prefrontal intermittent TBS (iTBS) on cortical reactivity and working memory performance, compared to one block of iTBS and sham stimulation. We hypothesized that greater cortical effects would be obtained with two blocks of iTBS...
January 8, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29317185/cortical-inhibition-assessed-using-paired-pulse-tms-eeg-is-increased-in-older-adults
#17
George M Opie, Simranjit K Sidhu, Nigel C Rogasch, Michael C Ridding, John G Semmler
BACKGROUND: Alterations in inhibitory processes mediated by gamma-aminobutyric acid type B (GABAB ) receptors may contribute to age-related functional impairments. However, investigation of these circuits using conventional paired-pulse transcranial magnetic stimulation (TMS) at long interstimulus intervals (∼100-200ms) have produced conflicting results in older adults, possibly due to the indirect nature of the TMS motor evoked potential (MEP). OBJECTIVE: To utilise electroencephalography and TMS coregistration (TMS-EEG) to more directly assess age-related changes in GABAB -mediated long-interval intracortical inhibition (LICI)...
December 30, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/29302713/psilocybin-disrupts-sensory-and-higher-order-cognitive-processing-but-not-pre-attentive-cognitive-processing-study-on-p300-and-mismatch-negativity-in-healthy-volunteers
#18
Anna Bravermanová, Michaela Viktorinová, Filip Tylš, Tomáš Novák, Renáta Androvičová, Jakub Korčák, Jiří Horáček, Marie Balíková, Inga Griškova-Bulanova, Dominika Danielová, Přemysl Vlček, Pavel Mohr, Martin Brunovský, Vlastimil Koudelka, Tomáš Páleníček
RATIONALE: Disruption of auditory event-related evoked potentials (ERPs) P300 and mismatch negativity (MMN), electrophysiological markers of attentive and pre-attentive cognitive processing, is repeatedly described in psychosis and schizophrenia. Similar findings were observed in a glutamatergic model of psychosis, but the role of serotonergic 5-HT2A receptors in information processing is less clear. OBJECTIVES: We studied ERPs in a serotonergic model of psychosis, induced by psilocybin, a psychedelic with 5-HT2A/C agonistic properties, in healthy volunteers...
February 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29291580/the-effect-of-panic-disorder-versus-anxiety-sensitivity-on-event-related-potentials-during-anticipation-of-threat
#19
Elizabeth S Stevens, Anna Weinberg, Brady D Nelson, Emily E E Meissel, Stewart A Shankman
Attention-related abnormalities are key components of the abnormal defensive responding observed in panic disorder (PD). Although behavioral studies have found aberrant attentional biases towards threat in PD, psychophysiological studies have been mixed. Predictability of threat, an important feature of threat processing, may have contributed to these mixed findings. Additionally, anxiety sensitivity, a dimensional trait associated with PD, may yield stronger associations with cognitive processes than categorical diagnoses of PD...
March 2018: Journal of Anxiety Disorders
https://www.readbyqxmd.com/read/29279627/one-year-comparative-evaluation-of-ketac-nano-with-resin-modified-glass-ionomer-cement-and-giomer-in-noncarious-cervical-lesions-a-randomized-clinical-trial
#20
Bollu Indira Priyadarshini, Thumu Jayaprakash, Bolla Nagesh, Chukka Ram Sunil, Varri Sujana, Velagala L Deepa
Aim: The purpose of this study was to evaluate the clinical performance of Ketac Nano (Ketac™ N100), RMGIC (Fuji Filling™ LC), and Giomer (Beautifil® II) in noncarious cervical lesions (NCCLs). Materials and Methods: One operator restored 120 NCCLs in 20 subjects, with at least two lesions restored with one of the restorative materials: RMGIC (control group), Giomer and Ketac Nano (experimental groups). Two observers evaluated retention, marginal discoloration, marginal adaptation, color match, surface roughness, and postoperative sensitivity using modified USPHS criteria at baseline, 6, and 12 months...
May 2017: Journal of Conservative Dentistry: JCD
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