Journal ArticleDOI
Finger representations in human primary somatosensory cortex as revealed by high-resolution functional MRI of tactile stimulation.
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TLDR
Fine-scale functional organization of the finger areas in the human primary somatosensory cortex was investigated by high-resolution BOLD MRI at 3 T using a multi-echo FLASH sequence with a voxel size of 2 mm(3) for the identification of individual variations in finger somatotopy.About:
This article is published in NeuroImage.The article was published on 2008-08-01. It has received 116 citations till now. The article focuses on the topics: Somatosensory evoked potential & Central sulcus.read more
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Journal ArticleDOI
Mapping human somatosensory cortex in individual subjects with 7T functional MRI.
TL;DR: The increased blood-oxygen-level-dependent contrast-to-noise ratio at ultra-high field (7 Tesla) is used to measure the topographic representation of the digits in human somatosensory cortex at 1 mm isotropic resolution in individual subjects to allow somatotopic fMRI to be used toMeasure the representation of digits in patients undergoing rehabilitation or plastic changes after peripheral nerve damage as well as tracking changes in normal subjects undergoing perceptual learning.
Journal ArticleDOI
Human finger somatotopy in areas 3b, 1, and 2: a 7T fMRI study using a natural stimulus.
Roberto Martuzzi,Wietske van der Zwaag,Juliane Farthouat,Rolf Gruetter,Rolf Gruetter,Olaf Blanke +5 more
TL;DR: It is found that each finger is represented within three subregions of S1 in the postcentral gyrus, which likely reflects distinct activations of BAs 3b, 1, and 2, similar to those described in electrophysiological work in non‐human primates.
Journal ArticleDOI
Within-Digit Functional Parcellation of Brodmann Areas of the Human Primary Somatosensory Cortex Using Functional Magnetic Resonance Imaging at 7 Tesla
Rosa M. Sanchez-Panchuelo,Julien Besle,Alexander Beckett,Richard Bowtell,Denis Schluppeck,Susan T. Francis +5 more
TL;DR: The ability to identify functional areas of S1 in vivo in individual subjects will provide a framework for investigating more complex aspects of tactile representation in S1 and show that within-finger topography is present at the millimeter scale in the cortex and is highly reproducible.
Journal ArticleDOI
Investigating the Stability of Fine-Grain Digit Somatotopy in Individual Human Participants.
James Kolasinski,Tamar R. Makin,Saad Jbabdi,Stuart Clare,Charlotte J. Stagg,Heidi Johansen-Berg +5 more
TL;DR: The ability of ultra-high-field imaging beyond a technological proof of principle to investigate the intersubject variability of digit somatotopy across participants and the stability of this organization across a range of intervals is extended.
Journal ArticleDOI
Somatosensory activation of two fingers can be discriminated with ultrahigh-density diffuse optical tomography
Christina Habermehl,Susanne Holtze,Jens Steinbrink,Stefan Koch,Hellmuth Obrig,Hellmuth Obrig,Hellmuth Obrig,Jan Mehnert,Jan Mehnert,Christoph H. Schmitz +9 more
TL;DR: This work tested the advantage of ultrahigh-density probe arrays and show that highly focal activations would be missed by classical next-nearest neighbor NIRS approach, but also by DOT, when using a sparse probe array, and hypothesize that HD-DOT may render very focal activation accessible which would be missing by the traditionally used sparse arrays.
References
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A global optimisation method for robust affine registration of brain images
Mark Jenkinson,Stephen M. Smith +1 more
TL;DR: It is demonstrated that the use of local optimisation methods together with the standard multi-resolution approach is not sufficient to reliably find the global minimum, so a global optimisation method is proposed that is specifically tailored to this form of registration.
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Measuring the thickness of the human cerebral cortex from magnetic resonance images
Bruce Fischl,Anders M. Dale +1 more
TL;DR: An automated method for accurately measuring the thickness of the cerebral cortex across the entire brain and for generating cross-subject statistics in a coordinate system based on cortical anatomy is presented.
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Somatic motor and sensory representation in the cerebral cortex of man as studied by electrical stimulation
Wilder Penfield,Edwin Boldrey +1 more
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Processing strategies for time-course data sets in functional mri of the human brain
TL;DR: The most effective method for image processing involves thresholding by shape as characterized by the correlation coefficient of the data with respect to a reference waveform followed by formation of a cross‐correlation image.
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Localization of the motor hand area to a knob on the precentral gyrus. A new landmark.
TL;DR: Using functional magnetic resonance imaging (fMRI) it is concluded that neural elements involved in motor hand function are located in a characteristic 'precentral knob' which is a reliable landmark for identifying the precentral gyrus under normal and pathological conditions.
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