keyword
MENU ▼
Read by QxMD icon Read
search

P3a

keyword
https://www.readbyqxmd.com/read/28833760/distinct-patterns-of-discrimination-and-orienting-for-temporal-processing-of-speech-and-nonspeech-in-chinese-children-with-autism-an-event-related-potential-study
#1
Dan Huang, Luodi Yu, Xiaoyue Wang, Yuebo Fan, Suiping Wang, Yang Zhang
Although many studies have reported domain-general impaired duration perception for speech and nonspeech sounds in children with autism, it remained unclear whether this phenomenon is universally applicable regardless of language background. In some languages such as Finnish and Japanese, vowel duration serves a phonemic role that can signify semantic distinction, and in others (e.g., Mandarin Chinese), vowel duration does not carry this phonemic function. The present event-related potential study investigated neural sensitivity to duration contrasts in speech and nonspeech contexts in Mandarin-speaking children with autism and a control group of age-matched typically developing (TD) children...
August 22, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28751739/distinct-brain-responses-to-different-inhibitions-evidence-from-a-modified-flanker-task
#2
Liufang Xie, Maofan Ren, Bihua Cao, Fuhong Li
Whether inhibition is a unitary or multifaceted construct is still an open question. To clarify the electrophysiological distinction among the different types of inhibition, we used a modified flanker paradigm, in which interference inhibition, rule inhibition, and response inhibition were compared to non-inhibition condition. The results indicated that, compared to the non-inhibition condition (1) the interference inhibition condition induced larger negativities during N2 epoch at the frontal region, (2) the rule inhibition condition elicited a larger N1 at the posterior region, followed by a larger P3a at the frontal region, reflecting the function of proactive cognitive control in the new stimulus-reaction (S-R) association, and (3) the response inhibition condition evoked a larger P3b at the posterior region, reflecting the process of suppressing the old response and reprogramming the new action...
July 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724323/evidence-that-disrupted-orienting-to-evaluative-social-feedback-undermines-error-correction-in-rejection-sensitive-women
#3
Jennifer A Mangels, Olta Hoxha, Sean P Lane, Shoshana N Jarvis, Geraldine Downey
For individuals high in Rejection Sensitivity (RS; Downey & Feldman, 1996), a learned orientation to anxiously expect rejection from valued others, negative feedback from social sources may disrupt engagement with learning opportunities, impeding recovery from mistakes. One context in which this disruption may be particularly pronounced is among women high in RS following evaluation by a male in authority. To investigate this prediction, 40 college students (50% female) answered general knowledge questions followed by immediate performance feedback and the correct answer while we recorded event-related potentials...
July 20, 2017: Social Neuroscience
https://www.readbyqxmd.com/read/28715711/sustained-attention-ability-in-schizophrenia-investigation-of-conflict-monitoring-mechanisms
#4
Marc Hoonakker, Nadège Doignon-Camus, José Eduardo Marques-Carneiro, Anne Bonnefond
OBJECTIVE: The main goal of the current study was to assess, with a time-on-task approach, sustained attention ability in schizophrenia, and to investigate conflict monitoring underlying this ability. METHODS: Behavioral and event-related potentials data (N2 and P3a amplitudes) were recorded in a long-lasting sustained attention Go/NoGo task (sustained attention to response task, SART), over a period of 30min, in 29 patients with schizophrenia and 29 pair-matched healthy subjects...
September 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28682830/temporal-attention-is-involved-in-the-enhancement-of-attentional-capture-with-task-difficulty-an-event-related-brain-potential-study
#5
Fumie Sugimoto, Motohiro Kimura, Yuji Takeda, Jun'ichi Katayama
In a three-stimulus oddball task, the amplitude of P3a elicited by deviant stimuli increases with an increase in the difficulty of discriminating between standard and target stimuli (i.e. task-difficulty effect on P3a), indicating that attentional capture by deviant stimuli is enhanced with an increase in task difficulty. This enhancement of attentional capture may be explained in terms of the modulation of modality-nonspecific temporal attention; that is, the participant's attention directed to the predicted timing of stimulus presentation is stronger when the task difficulty increases, which results in enhanced attentional capture...
August 16, 2017: Neuroreport
https://www.readbyqxmd.com/read/28675491/electrocortical-components-of-anticipation-and-consumption-in-a-monetary-incentive-delay-task
#6
Douglas J Angus, Andrew J Latham, Eddie Harmon-Jones, Matthias Deliano, Bernard Balleine, David Braddon-Mitchell
In order to improve our understanding of the components that reflect functionally important processes during reward anticipation and consumption, we used principle components analyses (PCA) to separate and quantify averaged ERP data obtained from each stage of a modified monetary incentive delay (MID) task. Although a small number of recent ERP studies have reported that reward and loss cues potentiate ERPs during anticipation, action preparation, and consummatory stages of reward processing, these findings are inconsistent due to temporal and spatial overlap between the relevant electrophysiological components...
July 4, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28639417/auditory-processing-in-autism-spectrum-disorder-mismatch-negativity-deficits
#7
Chantal Vlaskamp, Bob Oranje, Gitte Falcher Madsen, Jens Richardt Møllegaard Jepsen, Sarah Durston, Cathriona Cantio, Birte Glenthøj, Niels Bilenberg
Children with autism spectrum disorders (ASD) often show changes in (automatic) auditory processing. Electrophysiology provides a method to study auditory processing, by investigating event-related potentials such as mismatch negativity (MMN) and P3a-amplitude. However, findings on MMN in autism are highly inconsistent, partly due to small sample sizes in the studies and differences in MMN paradigms. Therefore, in the current study, MMN and P3a amplitude were assessed in a relatively large sample of children with ASD, using a more extensive MMN paradigm and compared with that of typically developing children (TDC)...
June 22, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28620292/dynamic-responses-in-brain-networks-to-social-feedback-a-dual-eeg-acquisition-study-in-adolescent-couples
#8
Ching-Chang Kuo, Thao Ha, Ashley M Ebbert, Don M Tucker, Thomas J Dishion
Adolescence is a sensitive period for the development of romantic relationships. During this period the maturation of frontolimbic networks is particularly important for the capacity to regulate emotional experiences. In previous research, both functional magnetic resonance imaging (fMRI) and dense array electroencephalography (dEEG) measures have suggested that responses in limbic regions are enhanced in adolescents experiencing social rejection. In the present research, we examined social acceptance and rejection from romantic partners as they engaged in a Chatroom Interact Task...
2017: Frontiers in Computational Neuroscience
https://www.readbyqxmd.com/read/28582903/magnetic-stimulation-at-acupoints-relieves-mental-fatigue-an-event-related-potential-p300-study
#9
Shuo Yang, Yanyun Qiao, Lei Wang, Pengru Hao
BACKGROUND: Mental fatigue caused by continuous cognitive tasks represents one of the most worrying modern health problems. Event Related Potential (ERP) P300 is thought to be associated with cognitive function. OBJECTIVE: This study aimed at characterizing the neural activity correlated with the attentional processes and exploring a novelty method which combine the magnetic stimulation and acupoint to relieve mental fatigue caused by continuous cognitive tasks...
July 20, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28555099/load-dependent-increases-in-delay-period-alpha-band-power-track-the-gating-of-task-irrelevant-inputs-to-working-memory
#10
Andrew J Heinz, Jeffrey S Johnson
Studies exploring the role of neural oscillations in cognition have revealed sustained increases in alpha-band power (ABP) during the delay period of verbal and visual working memory (VWM) tasks. There have been various proposals regarding the functional significance of such increases, including the inhibition of task-irrelevant cortical areas as well as the active retention of information in VWM. The present study examines the role of delay-period ABP in mediating the effects of interference arising from on-going visual processing during a concurrent VWM task...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28511977/role-of-acetylcholine-and-serotonin-in-novelty-processing-using-an-oddball-paradigm
#11
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 behaviour 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/28487515/auditory-target-and-novelty-processing-in-patients-with-unilateral-hippocampal-sclerosis-a-current-source-density-study
#12
Adrià Vilà-Balló, Clément François, David Cucurell, Júlia Miró, Mercè Falip, Montserrat Juncadella, Antoni Rodríguez-Fornells
The capacity to respond to novel events is crucial for adapting to the constantly changing environment. Here, we recorded 29-channel Event Related Brain Potentials (ERPs) during an active auditory novelty oddball paradigm and used for the first time Current Source Density-transformed Event Related Brain Potentials and associated time-frequency spectra to study target and novelty processing in a group of epileptic patients with unilateral damage of the hippocampus (N = 18) and in healthy matched control participants (N = 18)...
May 9, 2017: Scientific Reports
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
#13
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/28466359/dysfunctions-in-striatal-microstructure-can-enhance-perceptual-decision-making-through-deficits-in-predictive-coding
#14
Christian Beste, Moritz Mückschel, Raymond Rosales, Aloysius Domingo, Lillian Lee, Arlene Ng, Christine Klein, Alexander Münchau
An important brain function is to predict upcoming events on the basis of extracted regularities of previous inputs. These predictive coding processes can disturb performance in concurrent perceptual decision-making and are known to depend on fronto-striatal circuits. However, it is unknown whether, and if so, to what extent striatal microstructural properties modulate these processes. We addressed this question in a human disease model of striosomal dysfunction, i.e. X-linked dystonia-parkinsonism (XDP), using high-density EEG recordings and source localization...
May 2, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28460035/music-induced-positive-mood-broadens-the-scope-of-auditory-attention
#15
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)...
July 1, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28410866/backward-masking-interrupts-spatial-attention-slows-downstream-processing-and-limits-conscious-perception
#16
Talia Losier, Christine Lefebvre, Mattia Doro, Roberto Dell'Acqua, Pierre Jolicœur
The attentional blink (AB) is a difficulty in correctly processing a target when it follows one or more other targets after a short delay. When no backward mask is presented after the last critical target, there is no or little behavioral AB deficit. The mask plays an important role in limiting conscious access to target information. In this electrophysiological study, we tested the impact of masking on the deployment and engagement of attention by measuring the N2pc and P3 components in an RSVP paradigm. We found that the presence of a mask in an AB paradigm reduced the amplitude of the N2pc, P3a, and P3b components...
April 11, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28389366/musical-rhythm-and-pitch-a-differential-effect-on-auditory-dynamics-as-revealed-by-the-n1-mmn-p3a-complex
#17
E Sebastian Lelo-de-Larrea-Mancera, Yaneth Rodríguez-Agudelo, Rodolfo Solís-Vivanco
Music represents a complex form of human cognition. To what extent our auditory system is attuned to music is yet to be clearly understood. Our principal aim was to determine whether the neurophysiological operations underlying pre-attentive auditory change detection (N1 enhancement (N1e)/Mismatch Negativity (MMN)) and the subsequent involuntary attentional reallocation (P3a) towards infrequent sound omissions, are influenced by differences in musical content. Specifically, we intended to explore any interaction effects that rhythmic and pitch dimensions of musical organization may have over these processes...
April 4, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28389250/significance-and-novelty-effects-in-single-trial-erp-components-and-autonomic-responses
#18
Brett MacDonald, Robert J Barry
The phasic orienting reflex (OR) was investigated in two counterbalanced blocks of an auditory dishabituation paradigm differing in stimulus Significance (operationalised as tone counting). Twelve tones were presented at very long, randomly-varying interstimulus intervals (ISIs). Novelty and Significance were varied within subjects. Stimulus-response patterns were assessed to find ERP matches for autonomic measures. The phasic OR index was represented by the skin conductance response (SCR). SCR decremented over 10 standard trials, showed recovery on trial 11 (change trial), enhancement to re-presentation of the standard tone (trial 12: dishabituation), and a main effect of Significance over the first 10 trials - demonstrating the formal criteria for an OR index...
April 4, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28377160/increased-visual-task-difficulty-enhances-attentional-capture-by-both-visual-and-auditory-distractor-stimuli
#19
Fumie Sugimoto, Jun'ichi Katayama
Previous studies using a three-stimulus oddball task have shown the amplitude of P3a elicited by distractor stimuli increases when perceptual discrimination between standard and target stimuli becomes difficult. This means that the attentional capture by the distractor stimuli is enhanced along with an increase in task difficulty. So far, the increase of P3a has been reported when standard, target, and distractor stimuli were presented within one sensory modality (i.e., visual or auditory). In the present study, we further investigated whether or not the increase of P3a can also be observed when the distractor stimuli are presented in a different modality from the standard and target stimuli...
April 1, 2017: Brain Research
https://www.readbyqxmd.com/read/28330077/diversity-and-antagonistic-potential-of-marine-microbes-collected-from-south-west-coast-of-india
#20
S Sinimol, A R Sarika, A Jayakumaran Nair
The diversity of some of the culturable microorganisms associated with marine flora and fauna collected off Vizhinjam and Mulloor coast of South India was evaluated and their bioactive production potential determined. From a total of 24 bacteria, 4 actinomycetes and 8 fungi isolated from diverse marine sources, five bacterial species-BLM3, BSP2, BCS1, BCS4 and BMA6 showed inhibitory activity against at least one of the tested pathogens viz., Klebsiella pneumonia KU1, Pseudomonas aeruginosa VL3, Salmonella enterica typhimurium MTCC 98, Escherichia coli MTCC 40, Micrococcus luteus MTCC 105, Staphylococcus simulans MTCC 3610, Proteus vulgaris MTCC 426, Vibrio fluvialis, Vibrio sp...
June 2016: 3 Biotech
keyword
keyword
115546
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"