55 research outputs found

    Pre-Processed T1-weighted MPRAGE volumes

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    This folder contains all eight single pre-processed T1-weighted MPRAGE volumes used to generate the average with an isotropic resolution of 250 µm. Additionally, 1 and 0.5 mm pre-processed data of the same subject are included in the folder. Pre-processing consists of AC-PC alignment and bias field correction. Details can be found in the readme

    Averaged T1-weighted MPRAGE with an isotropic resolution of 250 µm

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    This folder contains structural data of a single young healthy Caucasian subject in NIfTI file format. This dataset has been build by registering eight single T1-weighted MPRAGE volumes with a native isotropic resolution of 250 µm and the average to increase the SNR

    Sourcedata of T1-weighted MPRAGE volumes

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    This folder contains all eight single unprocessed T1-weighted MPRAGE volumes used to generate the average with an isotropic resolution of 250 µm. Additionally, 1 and 0.5 mm unprocessed data of the same subject and motion tracking information of all acquisitions is included in the archive

    Schematic drawing of stimuli and corresponding cortical activations.

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    <p>First row: (A) Bilateral flow stimulus, (B) Unilateral flow stimulus in the right visual hemifield, (C) Unilateral flow stimulus in the left visual hemifield. 2–4<sup>th</sup> row (glassbrains; cortical activation contrasts calculated vs. corresponding rest conditions) (A): bilateral flow stimulus leads to activation in MT+ and additional occipito-parietal activation in both hemispheres. (B): unilateral flow in right visual hemifield leads to stronger activation in the left MT+ area, weaker activation in the right MT+ area (pMST) and additional activation in primary visual areas of the left hemisphere. (C): unilateral flow in the left visual hemifield leads to stronger activation in the right MT+ area, very weak activation in the left MT+ area (pMST) and activation in primary visual areas of the right hemisphere. Shown activations are FWE corrected, n = 18. Glassbrain presentation of data in axial coronal and sagittal planes (for maximum t-values compare <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0004043#pone-0004043-t001" target="_blank">table 1</a>).</p

    Flatmaps of (A) the left and (B) the right hemisphere of the human PALS Atlas.

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    <p>Functional data overlaid on the flattened template brain. Functional data are RGB coded, intensity scaled to arbitrary values between 0–255. Blue, bilateral flow stimulus activations; red, unilateral flow stimulus - ipsilateral activations; green, unilateral flow stimulus - contralateral activations. Mixed colors show overlay of activations. T-threshold = 6. Insets show enlarged sections of the MT+ complex. For ease of interpretation known human visual areas are outlined in blue, taken from human PALS atlas <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0004043#pone.0004043-vanEssen3" target="_blank">[26]</a>, and a lateral view on the slightly inflated 3D PALS template is given.</p

    Activation locations of main contrasts (stimulation (Stim.) vs. rest).

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    <p>Coordinates show the local maximum of an activated voxel cluster in MNI space; BA = Brodmann Area; fR = supposed functional region (V1/V2 means located in V1 or V2); T = T-value of maximum activated voxel, CS = cluster size, Mid. Temp. Gyr. = Middle Temporal Gyrus, Mid. Occ. Gyr. = Middle Occipital Gyrus, Inf. Par. Lob = Inferior Parietal Lobule.</p

    Eye movement data.

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    <p>(A) Original eye position trace of one subject in a rest and consecutive stimulation period. Leftward eye movements are shown as negative values. Small saccades as well as blinks (large positive excursions) are present in both rest and stimulation periods. (B) Saccadic frequency of n = 18 subjects in the rest and stimulation conditions.</p

    The EPI-PSF kernel based weighting maps and the ratio map in GE- (I) and SE-EPIs (II): two weighting maps, <i>W</i><sub><i>f</i></sub>(<i>s</i>) (a) and <i>W</i><sub><i>r</i></sub>(<i>s</i>) (b), are calculated respectively from the forward and reverse EPI-PSF kernel using Eq. 6 and the ratio (c) is shown in logarithmic scale using the equation log<sub>e</sub>(<i>W</i><sub><i>f</i></sub>(<i>s</i>)/<i>W</i><sub><i>r</i></sub>(<i>s</i>)).

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    <p>The EPI-PSF kernel based weighting maps and the ratio map in GE- (I) and SE-EPIs (II): two weighting maps, <i>W</i><sub><i>f</i></sub>(<i>s</i>) (a) and <i>W</i><sub><i>r</i></sub>(<i>s</i>) (b), are calculated respectively from the forward and reverse EPI-PSF kernel using <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0116320#pone.0116320.e006" target="_blank">Eq. 6</a> and the ratio (c) is shown in logarithmic scale using the equation log<sub>e</sub>(<i>W</i><sub><i>f</i></sub>(<i>s</i>)/<i>W</i><sub><i>r</i></sub>(<i>s</i>)).</p
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