• The current study used functional magnetic resonance imaging (fMRI) to assess neural activity during task preparation and image presentation during different emotion regulation strategies, cognitive reappraisal and expressive suppression, in PTSD. (springer.com)
  • The potential of functional MRI (fMRI) to identify changes in cortical activation patterns associated with different levels of recovery has been demonstrated in several studies probing functional consequences of brain damage. (ahajournals.org)
  • We therefore used fMRI and an active and passive ankle dorsiflexion paradigm to test for cortical functional reorganization in patients with gait impairment and chronic disability after stroke. (ahajournals.org)
  • Our aims were to use ankle dorsiflexion as an analog of hand flexion-extension to test for evidence of potentially compensatory activation in patients with lower limb paresis after stroke as has been found for the upper limb and to determine whether interindividual differences in the poststroke fMRI response are correlated with the degree of functional impairment of the lower limb. (ahajournals.org)
  • This functional magnetic resonance imaging (fMRI) study demonstrated significant differences in activation of hypothalamic-pituitary-adrenal (HPA) circuitry in adult women with attenuation during ovulation and increased activation during early follicular phase. (jneurosci.org)
  • To test how modulation of auditory cortex (AC) influences functional networks and whether this influence is asymmetrical, the present study measured resting-state fMRI connectivity networks in 17 healthy volunteers before and immediately after TMS (continuous theta burst stimulation) to the left or right AC, and the vertex as a control. (jneurosci.org)
  • We performed functional magnetic resonance imaging (fMRI) to investigate the neural correlates of tactile SJ using tactile number judgement as a time-irrelevant control task. (nature.com)
  • In our previous functional magnetic imaging (fMRI) study 9 , we directly compared the neural correlates of tactile TOJ with those of SJ. (nature.com)
  • The extremely variable neurocognitive profiles in surgical epilepsy patients cannot be fully explained by extent of resection, fiber integrity, or current task-based functional MRI (fMRI). (thejns.org)
  • Functional connectivity, activation maps, and laterality indices for language dominance were analyzed from fMRI data. (thejns.org)
  • Methods 57 patients with epilepsy were identified with language functional MRI (fMRI) and diffusion MRI acquisition. (bmj.com)
  • In individual subjects, some studies have shown a correlation between the volume of the arcuate fasciculus tract and language lateralisation, determined by the WADA test 4 and by functional MRI (fMRI)I, 5 while others have not found a consistent association. (bmj.com)
  • ABSTRACT: Neural activity during language production in aphasia typically has been measured using functional magnetic resonance imaging (fMRI) during silent production tasks. (ufl.edu)
  • Functional magnetic resonance imaging (fMRI) can be used to non-invasively map language function in the human brain. (edu.au)
  • An fMRI study of the relative laterality of dominant and non-dominant hand sensory function. (edu.au)
  • WASHINGTON - (December 11, 2017) - Functional magnetic resonance imaging (fMRI) has allowed researchers to map the memory functions that are often impaired within the brains of children with epilepsy. (eurekalert.org)
  • A second study demonstrated the ability of functional connectivity analysis within a resting-state fMRI to assess language laterality, meaning to help determine the dominant side of the brain controlling language, when compared with the current standard of a language-task fMRI measure. (eurekalert.org)
  • The study found that when compared with typical language assessment tasks, resting state fMRI functional connectivity analysis matched the results of the task activity findings slightly more than two thirds of the time. (eurekalert.org)
  • While more research is needed, the study succeeded in demonstrating the potential of data-driven methods to establish reliable language laterality even without a task-based fMRI. (eurekalert.org)
  • To investigate this issue, we scanned younger and older adults with functional magnetic resonance imaging (fMRI) while performing three different tasks: working memory, visual attention and episodic retrieval. (diva-portal.org)
  • 4. - 5 The neuroimaging techniques such as functional magnetic resonance imaging (fMRI) and positron emission tomography (PET) have been widely used to image brain functions for many neurodegenerative diseases. (spiedigitallibrary.org)
  • Previous studies to determine memory lateralization with functional MR imaging (fMRI) have used encoding or recall tasks. (ajnr.org)
  • 2 - 5 In recent years, there has been an increasing interest in the utility of functional MR imaging (fMRI) for presurgical evaluation of memory. (ajnr.org)
  • This is undertaken using a variety of methods including studying patients in whom the hemispheres have been surgically separated (a callosotomy or split brain), functional magnetic resonance (fMRI) and diffusion tensor imaging (DTI), and event-related potentials (ERP). (plymouth.ac.uk)
  • To use functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI) to investigate visual system development in children being treated for retinoblastoma. (arvojournals.org)
  • Diagnostic brain and orbital imaging was followed by investigational functional neuroimaging, which included fMRI during photic stimulation through closed eyelids, to measure functional activation in the visual cortex, and DTI, to evaluate diffusion parameters of white matter tracts in the corpus callosum and the periventricular optic radiations. (arvojournals.org)
  • We used functional magnetic resonance imaging (fMRI) to compare these two types of attentional effects and examine how they may interact in the human brain. (psu.edu)
  • Previous work has shown that this allele is associated with functional (fMRI) changes as well structural grey matter (GM) changes in healthy young, middle-aged and older subjects. (plos.org)
  • Differences in gcy expression patterns in the ASE neurons of C. briggsae arise from a difference in cis- regulatory elements and trans- acting factors that control ASE laterality. (genetics.org)
  • In sum, our results indicate the existence of a surprising multitude of putative chemoreceptors in the gustatory ASE neurons and suggest the existence of a substantial degree of laterality in gustatory signaling mechanisms in nematodes. (genetics.org)
  • Functional connectivity was determined as the temporal correlation of blood oxygen level-dependent signals with seed regions defined within the specific and nonspecific thalamic nuclei. (nih.gov)
  • During deep sedation, propofol reduced functional connectivity by 43% (specific) and 79% (nonspecific), a significantly greater reduction in the nonspecific than in the specific system and in the left hemisphere than in the right. (nih.gov)
  • Upon regaining consciousness, functional connectivity increased by 58% (specific) and 123% (nonspecific) during recovery, exceeding their values at baseline. (nih.gov)
  • Propofol conferred differential changes in functional connectivity of the specific and nonspecific thalamocortical systems, particularly in left hemisphere, consistent with the verbal nature of stimuli and task. (nih.gov)
  • Experimental paradigm and the seeding of the specific and nonspecific thalamic nuclei for functional connectivity analysis. (nih.gov)
  • Functional connectivity analysis contributes unique insight into bihemispheric remodeling processes of language networks after epilepsy surgery, with characteristic findings in left and right TLE. (thejns.org)
  • Using a large stroke cohort and a machine-learning approach, we show that visual memory and verbal memory deficits are better predicted by functional connectivity than by lesion location, and visual and motor deficits are better predicted by lesion location than functional connectivity. (pnas.org)
  • We measured resting functional connectivity (FC), lesion topography, and behavior in multiple domains (attention, visual memory, verbal memory, language, motor, and visual) in a cohort of 132 stroke patients, and used machine-learning models to predict neurological impairment in individual subjects. (pnas.org)
  • The data-driven method of identifying language laterality through functional connectivity analysis was developed previously at Children's National and applied in this setting to test its ability to map the dominant regions of the brain controlling language. (eurekalert.org)
  • Thalamic functional connectivity predicts seizure onset laterality in individual TLE patients: Application of a biomarker development strategy, Neuroimage: Clinical, doi: 10.1016/j.nicl.2014.08.002. (txstate.edu)
  • Conclusions: The functional-rTMS protocol enhanced cortical excitability following a single-session and after repeated sessions and improved steadiness, whereas the passive stimulation protocol tended to decrease excitation and no improvements in steadiness were observed. (iospress.com)
  • Functional MRI laterality indices (LIs)were calculated for lateral frontal, medial frontal, and posterior perisylvian cortex regions of interest (ROIs): L=number of active voxels in left hemisphere ROI and R=number of active voxels in right hemisphere ROI using the following formula: (L-R)/(L+R). LIs could vary from -1 (completely right lateralized) to +1 (completely left lateralized). (clinicaltrials.gov)
  • The prevalence of laterality in nature suggests that bilateral symmetry may, in fact, be more superficial than originally thought and, while much is known about the developmental genetic basis for normal asymmetric development of the visceral organs and brain, comparatively little is known about the genetic basis of laterality in normally paired structures. (biomedcentral.com)
  • Both headache laterality and headache type interact with the degree of comorbidity with higher impairment in patients with left-sided and bilateral headaches as well as in patients with migraine or cluster headache. (frontiersin.org)
  • The aim of this study was to assess the relationship between the degree of unilateral spatial neglect during the acute phase of stroke and long-term functional independence. (scielo.br)
  • The method can also be applied to quantitatively assess laterality of other brain functions. (edu.au)
  • Figure 1A ) to assess the anatomical and functional specificity of alpha- and beta-band rhythms and their effects on the local excitability of sensorimotor neuronal ensembles during performance of a motor imagery task that offers a window into movement selection. (elifesciences.org)
  • 3-7 Thus, motor control ( i.e. , the command center for movements regardless of the laterality of the effectors involved) resides in the hemisphere which handles respiration and speech at the same time. (asahq.org)
  • Functional optical topography (fOT), imaging based on functional near-infrared spectroscopy measurement, is an another noninvasive neuroimaging technique that provides continuous recording of brain hemodynamic activity with detection of oxy- and deoxy-hemoglobin concentration changes. (spiedigitallibrary.org)
  • Further, we show that the evolutionary history of the Perissodini is characterized by an accentuation of craniofacial laterality such that certain taxa show elaborate sided differences in craniofacial shape consistent with the sub-partitioning of function between sides of the head during attacks. (biomedcentral.com)
  • The central aim of this research is to determine whether individual differences in age-related cognitive decline are reflected in functional reorganization in the brain, and whether these changes are mediated by the degree of structural preservation. (plymouth.ac.uk)
  • For this purpose we study how reward circuits modulate executive function (self-control), interoception, and motivation in the normal human brain including an understanding of the role of brain dopamine signaling, functional brain network interactions and genetics. (nih.gov)
  • Continued work on the developmental genetic basis of laterality in the Perissodini will facilitate a better understanding of the evolution of this unique group of fishes, as well as of left-right axis determination among vertebrates in general. (biomedcentral.com)
  • This was a prospective study of right ischemic stroke patients in which the independent variable was the degree of spatial neglect and the outcome that was measured was functional independence. (scielo.br)
  • We appreciate Alves et al for their comments on our article, Effect of Right Insular Involvement on Death and Functional Outcome After Acute Ischemic Stroke in the IST-3 Trial. (ahajournals.org)
  • The relationship between unilateral spatial neglect and functional independence was analyzed using multiple logistic regression that was corrected for confounding factors. (scielo.br)
  • The severity of unilateral spatial neglect in acute stroke worsens the degree of long-term disability and functional independence. (scielo.br)
  • Here we report a genetic screen to discover mutations which perturb organ laterality. (hindawi.com)
  • Finally, genetic interference experiments demonstrated a functional interaction between the core planar cell polarity signaling gene vangl2 and myo1d in LR axis formation. (xenbase.org)
  • Craniofacial laterality in the scale-eating specialist Perissodus microlepis was found to be evident early in development and exhibited a unimodal distribution, which is contrary to the adult condition where jaw laterality has been described as a discrete, bimodal antisymmetry. (biomedcentral.com)
  • That laterality decisions of organs may be independently perturbed, as in the Class 3 mutation, indicates that there are distinctive pathways for reception and organotypic interpretation of the global signals. (hindawi.com)
  • Approximate statistics are below: Favoring right hand: 88.2% Favoring right foot: 81.0% Favoring right eye: 71.1% Favoring right ear: 59.1% Same hand and foot: 84% Same ear and eye: 61.8% Laterality of motor and sensory control has been the subject of a recent intense study and review. (wikipedia.org)
  • Because of this functional division of the left and right sides of the body and of the space that surrounds it, the processing of information in the sensory cortices is essentially identical. (wikipedia.org)
  • The occipital reduction is consistent with the view that sensory processing decline is a common cause in cognitive aging, and the prefrontal increase may reflect functional compensation. (diva-portal.org)
  • Laterality of motor control and consciousness shares the same hemisphere. (nih.gov)
  • The main areas involved in USN are related to the right hemisphere, such as lesions in the right posterior parietal lobe ( 11 - 12 ), and individuals with USN after stroke present with major functional disabilities as well as decreased rates of adherence to rehabilitation programs ( 13 - 15 ). (scielo.br)