Sentences with phrase «voxel in»

Proton magnetic resonance spectroscopy (1H - MRS) was performed with a 1.5 T MR system on a voxel in the bilateral ACC in 85 chronic pain patients and 20 age - matched normal control subjects.

They split each cubic micrometre into a 10 × 10 × 2 grid and focused the trap on each voxel in turn.

This approach is analogous to common fMRI analysis approaches in which regressions are carried out independently at each voxel in the brain, followed by correction for multiple comparisons across voxels.

The bottom sets of scans obtained from the patient (Panel C) and the control subject (Panel D) show activation (blue) resulting from the spatial imagery task (cued with the word «navigation») as compared with rest periods, as well as the time course of the peak voxel in the parahippocampal gyrus.

The top sets of scans obtained from the patient (Panel A) and the control subject (Panel B) show activation (yellow and orange) resulting from the motor imagery task (cued with the word «tennis») as compared with rest periods (cued with the word «relax»), as well as the time course of the peak voxel in the supplementary motor area.

Then a cross-correlation matrix was calculated, correlating each voxel's time course to all other voxels in the data set.

Incorporating an oft - requested local co-op mode, the complimentary content's headline addition is the vaunted vessel editor, allowing you to arrange your own vibrant voxels in order to create a Ferox or Phobos of your very own.

Not exact matches

The obtained smoothness parameters for each analysis, as well as information about the voxel clusters found to be significant by the Monte Carlo simulation, are presented in Table S3.

This revealed, they say, «active voxel clusters in the salmon's brain cavity and spinal column».

In the new system, a mathematical model uses the fMRI signal data to construct a 3 - D map that consists of more than 1,000 voxels (pixels in three dimensions), with each voxel representing a single point of measurement of serotonin reuptakIn the new system, a mathematical model uses the fMRI signal data to construct a 3 - D map that consists of more than 1,000 voxels (pixels in three dimensions), with each voxel representing a single point of measurement of serotonin reuptakin three dimensions), with each voxel representing a single point of measurement of serotonin reuptake.

Each point, or «voxel,» in the brain has neural fibers running in and out in three dimensions.

After treatment with ECT, connectivity was dramatically decreased in one cluster of voxels around an area called the dorsolateral prefrontal cortex, the researchers report today in the Proceedings of the National Academy of Sciences.

Voxels were considered to be highly connected if their changes in blood oxygenation were strongly correlated — if one went up and the other went up to a similar degree.

In their experiments, the researchers considered clusters of three different sizes — 16, 32, and 64 voxels to a face.

The software assigns colors to each small 3 - D area, called a voxel, according to the difference in signal changes within each of the areas between the two scans.

Unlike functional MRI, which visualizes «voxels» of active gray matter containing upward of one million neurons, this method homes in on individual cells.

While the activation of the voxels varies randomly during other parts of the film, at each of the 15 key moments certain voxels are in the same position for each viewer and form an identical fingerprint pattern,» describes Iiro Jääskeläinen, Aalto University professor in systems neuroscience.

To point out which specific brain regions have the strongest association between global network organization and IQ, an exploratory analysis was conducted, in which the normalized path length of each individual node (i.e., voxel) was correlated with IQ separately (supplemental material, available at www.jneurosci.org).

This resulted in a correlation - coefficient map indicating which voxels showed a significant association between the full - scale IQ scores and normalized path length.

The SPM analysis revealed no group differences in MP - induced decreases in BPND in striatum but unexpectedly revealed larger BPND decreases in marijuana abusers than in controls in midbrain (region centered in susbtantia nigra that also encompassed subthalamic nucleus; center of cluster left: 12, − 14, − 10, and 132 voxels, t = 3.1; center of cluster right: 14, − 18, − 8, and 27 voxels; t = 2.9; PFWE < 0.05; SVC = 10 voxels)(Fig. 3 and Table 2).

In summary, individual functional brain networks were formed out of all the cortical and subcortical brain voxels (∼ 9500 voxels, called nodes) with connections between all functionally linked voxels.

Small - world and scale - free organization of voxel based resting - state functional connectivity in the human brain

(A) SPM results for the comparison of MP vs. placebo on the BPND images from [11C] raclopride in marijuana abusers (MA) and in healthy controls (HC)(Puncorr < 0.005) and group comparisons for the effects of MP (ΔBPND)(P < 0.01, cluster size of 10 voxels).

Specifically, the voxels corresponding to striatum (caudate, putamen, and ventral striatum) and thalamus were defined in the MNI stereotactic space using the Automated Anatomical Labeling atlas (41); thresholding, the simplest method of image segmentation, was used to identify midbrain voxels on a T1 - weighted image (ch2.img; an average of 27 T1 - weighted scans of the same individual that is included in the MRIcro template folder).

Brain gray matter alterations and associated demographic profiles in adults with autism spectrum disorder: A meta - analysis of voxel - based morphometry studies.

A Voxel - Based Morphometry Study of the Brain of University Students Majoring in Music and Nonmusic Disciplines.

False positives in auditory cortex were further eliminated using an extend threshold > 30 voxels for all analyses.

Common and distinct neural correlates of emotional processing in Bipolar Disorder and Major Depressive Disorder: a voxel - based meta - analysis of functional magnetic resonance imaging studies.

By analyzing multiple patients with damage to a particular voxel or cluster of voxels and comparing their cognitive abilities with those of patients in whom the same structures were intact, the researchers were able to identify brain regions essential to specific cognitive functions, and those structures that contribute significantly to intelligence.

Prospective longitudinal voxel - based morphometry study of major depressive disorder in young individuals at high familial risk.

White matter differences in euthymic bipolar I disorder: a combined magnetic resonance imaging and diffusion tensor imaging voxel - based study.

In an HBM poster from the 2012 meeting, You and colleagues reported using a «connectivity degree» — computed by counting, for each voxel, the number of voxels meeting a correlation threshold of r > 0.25 inside (local) and outside (distant) its neighborhood defined as a sphere of 14 mm radius (Sepulcre et al., 2010)-- to find that degree of functional connectivity was higher in 7 — 13 - year - old children with ASD than TD children (You et al., 2012In an HBM poster from the 2012 meeting, You and colleagues reported using a «connectivity degree» — computed by counting, for each voxel, the number of voxels meeting a correlation threshold of r > 0.25 inside (local) and outside (distant) its neighborhood defined as a sphere of 14 mm radius (Sepulcre et al., 2010)-- to find that degree of functional connectivity was higher in 7 — 13 - year - old children with ASD than TD children (You et al., 2012in 7 — 13 - year - old children with ASD than TD children (You et al., 2012).

Participants (aged 10 - 23 years) included 17 males and females with FXS and 16 males and females serving as controls.Univariate voxel - based morphometric analyses, fractional amplitude of low - frequency fluctuations (fALFF) analysis, and group - independent component analysis with dual regression.Patients with FXS showed decreased functional connectivity in the salience, precuneus, left executive control, language, and visuospatial networks compared with controls.

To demonstrate the predictive value of individual differences in morphometric patterns of gray matter density for intelligence, we applied voxel - based morphometry (VBM) on structural magnetic resonance imaging (MRI) data from 308 adult participants (Nooner et al., 2012).

The spatial smoothness of T2 * images was greater at 3 T by less than 1 mm, suggesting that the greater extent of activation at 3 T beyond these spatial scales was not due primarily to increased intrinsic spatial correlations at 3 T. Rather, the increase in percentage of voxels activated reflects increased sensitivity for detection of brain activation at higher field strength.

Since the number of voxels differed across subjects as described above, for each element in the correlation matrix, some subjects may have a valid correlation coefficient for the corresponding node - pair whereas the other subjects may not have a valid correlation coefficient because either node in the node - pair is missing.

Therefore, when functional brain networks are constructed at the voxel - level, a resolution similar to ICA, a network based approach offers distinct advantages over ICA in understanding the overall organization of the brain network.

We then examined network modules in these voxel - based networks for consistency across subjects, and whether consistent modules are comparable to the RSNs found by ICA studies.

Each voxel was treated as a node in the resulting network.

Module - specific SI images are analogous to coefficient of variation (CV) images, which are used in ICA analyses to summarize consistency of RSNs at the voxel - level [5].

The normalized fMRI data was masked so that only the gray matter voxels corresponding to the areas specified by the AAL (Automated Anatomical Labeling) atlas [40] were included in the subsequent analyses.

No significant clusters in the reverse and interaction contrasts were observed at the voxel - corrected statistical threshold (although a more - lenient cluster - corrected threshold nonetheless yielded significant clusters in the same regions as in the original model).

In this work, we examined resting - state fMRI networks from 194 subjects at a voxel - level resolution, and examined the consistency of RSNs across subjects using a metric called scaled inclusivity (SI), which summarizes consistency of modular partitions across networks.

It is possible to visualize which subject is most representative at different voxel locations, as seen in Figure 3.

They were then multiplied with the group mask to ensure that each seed region only included brain voxels present in all participants.

In this work, consistency of modules in resting - state functional connectivity networks was examined at the voxel - level, a resolution comparable to that of group ICIn this work, consistency of modules in resting - state functional connectivity networks was examined at the voxel - level, a resolution comparable to that of group ICin resting - state functional connectivity networks was examined at the voxel - level, a resolution comparable to that of group ICA.

The association of changes in circulating glucose and hormones with brain activation to high - calorie food images was assessed using whole - brain, voxel - based correlation analyses (Figure 5).

Pixel's gaming icons are gorgeous, all wondrous stacks of flowing, glowing voxels... but they were just as gorgeous in the short film the movie's loosely based on.

Trion Worlds» voxel - based MMORPG Trove is now in free open beta on Xbox One and PlayStation 4.

After waiting to log in for the better part of an hour I finally got five minutes with free - to - play voxel building MMO, Trove.