Advertisement

Topics

PubMed Journals Articles About "Pattern Stressor Evoked Brain Activity Predict Reactivity" RSS

09:18 EST 11th December 2018 | BioPortfolio

Pattern Stressor Evoked Brain Activity Predict Reactivity PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Pattern Stressor Evoked Brain Activity Predict Reactivity articles that have been published worldwide.

More Information about "Pattern Stressor Evoked Brain Activity Predict Reactivity" on BioPortfolio

We have published hundreds of Pattern Stressor Evoked Brain Activity Predict Reactivity news stories on BioPortfolio along with dozens of Pattern Stressor Evoked Brain Activity Predict Reactivity Clinical Trials and PubMed Articles about Pattern Stressor Evoked Brain Activity Predict Reactivity for you to read. In addition to the medical data, news and clinical trials, BioPortfolio also has a large collection of Pattern Stressor Evoked Brain Activity Predict Reactivity Companies in our database. You can also find out about relevant Pattern Stressor Evoked Brain Activity Predict Reactivity Drugs and Medications on this site too.

Showing "Pattern stressor evoked brain activity predict reactivity" PubMed Articles 1–25 of 31,000+

Task-evoked functional connectivity does not explain functional connectivity differences between rest and task conditions.

During complex tasks, patterns of functional connectivity differ from those in the resting state. However, what accounts for such differences remains unclear. Brain activity during a task reflects an unknown mixture of spontaneous and task-evoked activities. The difference in functional connectivity between a task state and the resting state may reflect not only task-evoked functional connectivity, but also changes in spontaneously emerging networks. Here, we characterized the differences in apparent functi...


Constraints on neural redundancy.

Millions of neurons drive the activity of hundreds of muscles, meaning many different neural population activity patterns could generate the same movement. Studies have suggested that these redundant (i.e., behaviorally equivalent) activity patterns may be beneficial for neural computation. However, it is unknown what constraints may limit the selection of different redundant activity patterns. We leveraged a brain-computer interface, allowing us to define precisely which neural activity patterns were redun...

Whole-Brain Functional Ultrasound Imaging Reveals Brain Modules for Visuomotor Integration.

Large numbers of brain regions are active during behaviors. A high-resolution, brain-wide activity map could identify brain regions involved in specific behaviors. We have developed functional ultrasound imaging to record whole-brain activity in behaving mice at a resolution of ∼100 μm. We detected 87 active brain regions during visual stimulation that evoked the optokinetic reflex, a visuomotor behavior that stabilizes the gaze both horizontally and vertically. Using a genetic mouse model of congenital...


Brain network profiling defines functionally specialized cortical networks.

Neuroimaging research made rapid advances in the study of the functional architecture of the brain during the past decade. Many proposals endorsed the relevance of large-scale brain networks, defined as ensembles of brain regions that exhibit highly correlated signal fluctuations. However, analysis methods need further elaboration to define the functional and anatomical extent of specialized subsystems within classical networks with a high reliability. We present a novel approach to characterize and examine...

3D functional ultrasound imaging of pigeons.

Recent advances in ultrasound Doppler imaging have facilitated the technique of functional ultrasound (fUS) which enables visualization of brain-activity due to neurovascular coupling. As of yet, this technique has been applied to rodents as well as to human subjects during awake craniotomy surgery and human newborns. Here we demonstrate the first successful fUS studies on awake pigeons subjected to auditory and visual stimulation. To allow successful fUS on pigeons we improved the temporal resolution of fU...

Macrophage migration inhibitory factor (MIF) gene is associated with adolescents' cortisol reactivity and anxiety.

Emerging evidence points to interactions between inflammatory markers and stress reactivity in predicting mental health risk, but underlying mechanisms are not well understood. Macrophage Migration Inhibitory Factor (MIF) is a pleiotropic cytokine involved in inflammatory signaling and Hypothalamus Pituitary Adrenal (HPA) axis stress-response, and has recently been identified as a candidate biomarker for depression and anxiety risk. We examined polymorphic variations of the MIF gene in association with base...

Child and maternal attachment predict school-aged children's psychobiological convergence.

Psychobiological convergence-the alignment of task-related changes in children's self-reported and physiological indices of reactivity-has recently emerged as a powerful correlate of children's attachment representations, but has not been explored for its association with children's self-reported attachment, with parents' attachment, or with respect to cardiovascular reactivity. The present study found that, within a diverse community sample of mothers and school-aged children (N = 104, M  = 10.31), the...

Characterization of intraoperative motor evoked potential monitoring for the surgery of pediatric population with brain tumors.

To investigate the relationship between the reliability of the transcranial or transcortical motor evoked potential (MEP) response and age in pediatric patients aged < 15 years with brain tumor.

Does inhibition cause forgetting after selective retrieval? A reanalysis and failure to replicate.

Retrieval practice can produce forgetting, but it remains unclear using only behavioral data whether this forgetting is caused by targeted inhibition versus interference. Therefore, Wimber et al. (2015) used pattern classifier analyses of fMRI data to track individual memories in a novel variant of retrieval induced forgetting. After initial learning, people recalled target images across selective retrieval practice trials, and cortical activity patterns gradually became more similar to those evoked by the...

Cortical activation associated with motor preparation can be used to predict the freely chosen effector of an upcoming movement and reflects response time: An fMRI decoding study.

Motor action is prepared in the human brain for rapid initiation at the appropriate time. Recent non-invasive decoding techniques have shown that brain activity for action preparation represents various parameters of an upcoming action. In the present study, we demonstrated that a freely chosen effector can be predicted from brain activity measured using functional magnetic resonance imaging (fMRI) before initiation of the action. Furthermore, the activity was related to response time (RT). We measured brai...

Carbonic anhydrase related protein expression in astrocytomas and oligodendroglial tumors.

Carbonic anhydrase related proteins (CARPs) VIII, X and XI functionally differ from the other carbonic anhydrase (CA) enzymes. Structurally, they lack the zinc binding residues, which are important for enzyme activity of classical CAs. The distribution pattern of the CARPs in fetal brain implies their role in brain development. In the adult brain, CARPs are mainly expressed in the neuron bodies but only weaker reactivity has been found in the astrocytes and oligodendrocytes. Altered expression patterns of C...

Feasibility of imaging evoked activity throughout the rat brain using electrical impedance tomography.

Electrical Impedance Tomography (EIT) is an emerging technique which has been used to image evoked activity during whisker displacement in the cortex of an anaesthetised rat with a spatiotemporal resolution of 200 μm and 2 ms. The aim of this work was to extend EIT to image not only from the cortex but also from deeper structures active in somatosensory processing, specifically the ventral posterolateral (VPL) nucleus of the thalamus. The direct response in the cortex and VPL following 2 Hz forepaw s...

Acute stress and altruism in younger and older adults.

Recent studies of aging and decision making suggests that altruism increases with age. It is unclear, however, whether this pattern holds when choices are made under stress, as is often the case in real-world scenarios. The current study used an intertemporal choice task in which younger and older adults received a financial endowment before making a series of consequential intertemporal decisions involving gains, losses and charitable donations. Preceding the choice task, participants were exposed to a lab...

Stimulus-induced gamma power predicts the amplitude of the subsequent visual evoked response.

The efficiency of neuronal information transfer in activated brain networks may affect behavioral performance. Gamma-band synchronization has been proposed to be a mechanism that facilitates neuronal processing of behaviorally relevant stimuli. In line with this, it has been shown that strong gamma-band activity in visual cortical areas leads to faster responses to a visual go cue. We investigated whether there are directly observable consequences of trial-by-trial fluctuations in non-invasively observed ga...

Psychosocial stress reactivity is associated with decreased whole-brain network efficiency and increased amygdala centrality.

Cognitive and emotional functions are supported by the coordinated activity of a distributed network of brain regions. This coordinated activity may be disrupted by psychosocial stress, resulting in the dysfunction of cognitive and emotional processes. Graph theory is a mathematical approach to assess coordinated brain activity that can estimate the efficiency of information flow and determine the centrality of brain regions within a larger distributed neural network. However, limited research has applied g...

Factors promoting vulnerability to dysregulated stress reactivity and stress-related disease.

Effective coordination of the biological stress response is integral for the behavioral well-being of an organism. Stress reactivity is coordinated by an interplay of the neuroendocrine system and the sympathetic nervous system. The hypothalamus-pituitary-adrenal (HPA) axis plays a key role in orchestrating bodily responses to stress, and activity of the axis can be modified by a wide range of experiential events. This review will focus on several factors that influence subsequent HPA axis reactivity. Some ...

Steady-state evoked potentials distinguish brain mechanisms of self-paced versus synchronization finger tapping.

Sensorimotor synchronization (SMS) requires aligning motor actions to external events and represents a core part of both musical and dance performances. In the current study, to isolate the brain mechanisms involved in synchronizing finger tapping with a musical beat, we compared SMS to pure self-paced finger tapping and listen-only conditions at different tempi. We analyzed EEG data using frequency domain steady-state evoked potentials (SSEPs) to identify sustained electrophysiological brain activity durin...

Stress up-regulates oxidative burst in juvenile Chinook salmon leukocytes.

When fish perceive stressful scenarios, their hypothalamus-pituitary-interrenal axis is activated resulting in the release of corticotropin releasing hormone, adrenocorticotropic hormone (ACTH), and finally cortisol. The physiologic stress response of fish has most often been linked to the reduced performance of the immune system, with a few exceptions where the immune system is activated. In this report, we tested the hypothesis that oxidative burst activity levels in juvenile Chinook salmon (Oncorhynchus ...

Symbolic time series analysis of fNIRS signals in brain development assessment.

Objective: Assessing infant's brain development remains a challenge for neuroscientists and pediatricians despite great technological advances. As a non-invasive neuroimaging tool, functional near-infrared spectroscopy (fNIRS) has great advantages in monitoring infant's brain activity. To explore the dynamic features of hemodynamic changes in infants, in-pattern exponent (IPE), anti-pattern exponent (APE), as well as permutation cross-mutual information (PCMI) based on symbolic dynamics are proposed t...

Evoked Alpha Power is Reduced in Disconnected Consciousness During Sleep and Anesthesia.

Sleep and anesthesia entail alterations in conscious experience. Conscious experience may be absent (unconsciousness) or take the form of dreaming, a state in which sensory stimuli are not incorporated into conscious experience (disconnected consciousness). Recent work has identified features of cortical activity that distinguish conscious from unconscious states; however, less is known about how cortical activity differs between disconnected states and normal wakefulness. We employed transcranial magnetic ...

MULTIDIMENSIONAL BRAIN ACTIVITY DICTATED BY WINNER-TAKE-ALL MECHANISMS.

A novel demon-based architecture is introduced to elucidate brain functions such as pattern recognition during human perception and mental interpretation of visual scenes. Starting from the topological concepts of invariance and persistence, we introduce a Selfridge pandemonium variant of brain activity that takes into account a novel feature, namely, demons that recognize short straight-line segments, curved lines and scene shapes, such as shape interior, density and texture. Low-level representations of o...

Interoception is associated with heartbeat-evoked brain potentials (HEPs) in adolescents.

Heartbeat-evoked brain potentials (HEPs) are an index of the cortical reflection of cardiac interoceptive signals. Studies which have examined interoception in adolescents with the use of HEPs are not known to the authors so far. This study investigated the function of the HEP as a marker of interoception in adolescents. EEG and ECG were recorded in 46 adolescents during a resting condition and during a heartbeat detection task. Participants were asked for confidence in their interoceptive accuracy during h...

Cortical associates of emotional reactivity and regulation in childhood stuttering.

This study sought to determine the cortical associates of emotional reactivity and emotion regulation (as indexed by the amplitude of evoked response potentials [ERP]) in young children who do and do not stutter during passive viewing of pleasant, unpleasant and neutral pictures.

fNIRS reveals enhanced brain activation to female (versus male) infant directed speech (relative to adult directed speech) in Young Human Infants.

We hypothesized an association between auditory stimulus structure and activity in the brain that underlies infant auditory preference. In a within-infant design, we assessed brain activity to female and male infant directed relative to adult directed speech in 4-month-old infants using fNIRS. Results are compatible with the hypothesis that enhanced frontal brain activation, specifically in prefrontal cortex that is involved in emotion and reward, is evoked selectively by infant directed speech produced by ...

EEG-triggered TMS reveals stronger brain state-dependent modulation of motor evoked potentials at weaker stimulation intensities.

Corticospinal excitability depends on the current brain state. The recent development of real-time EEG-triggered transcranial magnetic stimulation (EEG-TMS) allows studying this relationship in a causal fashion. Specifically, it has been shown that corticospinal excitability is higher during the scalp surface negative EEG peak compared to the positive peak of μ-oscillations in sensorimotor cortex, as indexed by larger motor evoked potentials (MEPs) for fixed stimulation intensity.


Advertisement
Quick Search
Advertisement
Advertisement