Showing papers in "NeuroImage in 2000"

TL;DR: In this paper, the authors describe the steps involved in VBM, with particular emphasis on segmenting gray matter from MR images with non-uniformity artifact and provide evaluations of the assumptions that underpin the method, including the accuracy of the segmentation and the assumptions made about the statistical distribution of the data.

TL;DR: It is demonstrated that simultaneous EEG/ fMRI studies are for the first time possible, extending the scope of EEG/fMRI studies considerably.

TL;DR: Results corroborate comparative studies which implicate striatal and mesial forebrain circuitry in the elaboration of incentive-driven behavior and introduce a new paradigm for probing the functional integrity of this circuitry in humans.

TL;DR: A functional neuroimaging study with positron emission tomography in which six healthy adult volunteers were scanned while watching silent computer-presented animations showed increased activation in association with mental state attribution in four main regions: medial prefrontal cortex, temporoparietal junction, basal temporal regions, and extrastriate cortex.

TL;DR: A simple bias reduction and regularization for voxel-wise autoregressive model parameters and overcoming the problem of a small number of runs/session/subjects using a regularized variance ratio to increase the degrees of freedom are proposed.

TL;DR: The full hemodynamic model is presented, how its associated Volterra kernels can be derived, and the model's validity in relation to empirical nonlinear characterizations of evoked responses in fMRI and other neurophysiological constraints are addressed.

TL;DR: The left ventral premotor region that responded selectively to tools in the current study may be the human homolog of the monkey canonical F5 area, which responds to the visual presentation of graspable objects.

TL;DR: In a series of two studies, estimates of the hemodynamic response in or near the primary visual and motor cortices were compared across various paradigms and sampling procedures to determine the limits of ER-fMRI procedures as discussed by the authors.

TL;DR: A general method of deforming polyhedra is presented here, with two novel features that are used advantageously to identify automatically the total surface of the outer and inner boundaries of cerebral cortical gray matter from normal human MR images, accurately locating the depths of the sulci.

TL;DR: These maps of Brodmann's areas 17 and 18 are the first of their kind and contain precise stereotaxic information on both interhemispheric and interindividual differences.

TL;DR: The data suggest that attribution of intentions to others is associated with a complex cerebral activity involving the right medial prefrontal cortex when a nonverbal task is used.

TL;DR: Sp spontaneous vascular and metabolic LFO and VLFO can be reproducibly detected by NIRS in the human adult and correspond to findings with transcranial doppler sonography (TCD) and fMRI (Biswal et al., 1997).

TL;DR: The results support the hypothesis that the frontal MMN generator is activated later than the auditory cortex generator.

TL;DR: FMRI showed that common parietal and frontal regions are more activated during the covert task than the overt oculomotor condition and the possible nature of the relationship between these two operations is discussed.

TL;DR: It is shown that: (i) Whitening strategies can result in profound bias and are therefore probably precluded in parametric fMRI data analyses and (ii) Band-pass filtering, and implicitly smoothing, has an important role in protecting against inferential bias.

TL;DR: A study of the tracking behavior according to the influence given to the a priori knowledge is proposed and concrete tracking results obtained with in vivo human brain data are illustrated.

TL;DR: Investigating susceptibility-induced signal loss in the temporal lobes is investigated and it is proposed that by defining a priori regions of interest and using the small-volume statistical correction of K. Vandal, activations in these areas can sometimes be detected by increasing the statistical power of the analysis.

TL;DR: Functional magnetic resonance imaging findings indicate a dissociation in prefrontal and parietal cortex function during arithmetic processing and provide the first evidence for a specific role for the angular gyrus in arithmetic computation independent of other processing demands.

TL;DR: Findings show that the neural network supporting time perception involves the same brain areas that are responsible for the temporal planning and coordination of movements, indicating that time perception and motor timing rely on similar cerebral structures.

TL;DR: In this article, anatomical segregation of brain activation associated with performance in sound identification and localization was investigated in 18 normal subjects using fMRI in three conditions: (i) comparison of spatial stimuli simulated with interaural time differences; (ii) identification of environmental sounds; and (iii) rest.

TL;DR: FMRI results suggest that the dorsolateral prefrontal cortex serves to attenuate interference that results from having to actively enhance and suppress two languages in alternation, consistent with the view that switching between languages involves increased general executive processing.

TL;DR: No evidence was found to support either a left/right verbal/nonverbal WM processes or a dorsal/ventral spatial/nonspatial dissociation, and other factors that could account for the data are considered, including subjects' strategy selection, encoding of information into WM, and the nature of representational schemes in prefrontal cortex.

TL;DR: In this paper, a set of conceptual and methodological issues that are particularly relevant for the study of neural plasticity are discussed. And the authors argue that the imaging of learning-related and developmental plasticity can enhance the ability of functional neuroimaging to identify and characterize the underlying neural basis of cognition.

TL;DR: Functional imaging data can now be brought into the same standard anatomical format, and changes in regional cerebral blood flow can be calculated in VOIs of areas 3a, 3b, and 1, which are derived from genuine cytoarchitectonic data.

TL;DR: It is concluded that syllogistic reasoning is implemented in two distinct systems whose engagement is primarily a function of the presence or absence of semantic content.

TL;DR: It is suggested that left frontal and parietal regions modulate activity based on the successful retrieval of information from episodic memory.

TL;DR: In this article, the human neural systems for visual working memory using functional magnetic resonance imaging to distinguish sustained activity during memory delays from transient responses related to perceptual and motor operations are investigated. And the results demonstrate that visual working attention performance involves the concerted activity of multiple regions in a widely distributed system.

TL;DR: The data shed light on the manner in which monoaminergic tone, working memory, and prefrontal function interact and demonstrate that even in normal subjects the behavioral and neurophysiologic effects of dextroamphetamine are not homogeneous.

TL;DR: The results indicate that brain networks consisting of the bilateral prefrontal, intraparietal, and occipitotemporal cortices may play an important role in executing a NO-GO response.

TL;DR: Findings demonstrate significant differences between the neural responses to fear and to disgust, and between the covert presentations of these two emotions, and suggest distinct neural correlates of conscious and unconscious emotion perception.