keyword
MENU ▼
Read by QxMD icon Read
search

Brain mapping

keyword
https://www.readbyqxmd.com/read/28925598/atrophy-of-the-parahippocampal-gyrus-is-prominent-in-heart-failure-patients-without-dementia
#1
Tomomi Meguro, Yuko Meguro, Takeyoshi Kunieda
AIMS: The exacerbation of heart failure (HF) induces brain damage and cognitive impairment (CI), which frequently attenuates the effects of treatment. However, it is not clear whether HF patients without clinical dementia demonstrate increased risk of CI. We examined whether local atrophy in the parahippocampal gyrus, a potential predictor of CI, is prominent in HF patients without clinical dementia. METHODS AND RESULTS: Twenty stable HF patients with a history of admission due to decompensated HF or presentation of apparent pulmonary congestion following chest X-ray and 17 controls were enrolled in this observational, analytical, cross-sectional, case-control study...
July 17, 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/28924575/ex-vivo-tissue-imaging-for-radiology-pathology-correlation-a-pilot-study-with-a-small-bore-7-t-mri-in-a-rare-pigmented-ganglioglioma-exhibiting-complex-mr-signal-characteristics-associated-with-melanin-and-hemosiderin
#2
Kant M Matsuda, Ana Lopes-Calcas, Michael L Honke, Zoe O'Brien-Moran, Richard Buist, Michael West, Melanie Martin
To advance magnetic resonance imaging (MRI) technologies further for in vivo tissue characterization with histopathologic validation, we investigated the feasibility of ex vivo tissue imaging of a surgically removed human brain tumor as a comprehensive approach for radiology-pathology correlation in histoanatomically identical fashion in a rare case of pigmented ganglioglioma with complex paramagnetic properties. Pieces of surgically removed ganglioglioma, containing melanin and hemosiderin pigments, were imaged with a small bore 7-T MRI scanner to obtain T1-, T2-, and T2*-weighted image and diffusion tensor imaging (DTI)...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28924555/early-changes-in-brain-structure-correlate-with-language-outcomes-in-children-with-neonatal-encephalopathy
#3
Kevin A Shapiro, Hosung Kim, Maria Luisa Mandelli, Elizabeth E Rogers, Dawn Gano, Donna M Ferriero, A James Barkovich, Maria Luisa Gorno-Tempini, Hannah C Glass, Duan Xu
Global patterns of brain injury correlate with motor, cognitive, and language outcomes in survivors of neonatal encephalopathy (NE). However, it is still unclear whether local changes in brain structure predict specific deficits. We therefore examined whether differences in brain structure at 6 months of age are associated with neurodevelopmental outcomes in this population. We enrolled 32 children with NE, performed structural brain MR imaging at 6 months, and assessed neurodevelopmental outcomes at 30 months...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28923430/mapping-the-brain-of-the-chicken-gallus-gallus-with-emphasis-on-the-septal-hypothalamic-region
#4
REVIEW
Wayne J Kuenzel
There has been remarkable progress in discoveries made in the avian brain, particularly over the past two decades. This review first highlights some of the discoveries made in the forebrain and credits the Avian Brain Nomenclature Forum, responsible for changing many of the terms found in the cerebrum and for stimulating collaborative research thereafter. The Forum facilitated communication among comparative neurobiologists by eliminating confusing and inaccurate names. The result over the past 15 years has been a standardized use of avian forebrain terms...
September 15, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28923275/in-vivo-magnetic-resonance-images-reveal-neuroanatomical-sex-differences-through-the-application-of-voxel-based-morphometry-in-c57bl-6-mice
#5
Cassandra E Meyer, Florian Kurth, Stefano Lepore, Josephine L Gao, Hadley Johnsonbaugh, Mandavi R Oberoi, Stephen J Sawiak, Allan MacKenzie-Graham
Behaviorally relevant sex differences are often associated with structural differences in the brain and many diseases are sexually dimorphic in prevalence and progression. Characterizing sex differences is imperative to gaining a complete understanding of behavior and disease which will, in turn, allow for a balanced approach to scientific research and the development of therapies. In this study, we generated novel tissue probability maps (TPMs) based on 30 male and 30 female in vivo C57BL/6 mouse brain magnetic resonance images and used voxel-based morphometry (VBM) to analyze sex differences...
September 15, 2017: NeuroImage
https://www.readbyqxmd.com/read/28923274/mapping-orbitofrontal-limbic-maturation-in-non-human-primates-a-longitudinal-magnetic-resonance-imaging-study
#6
Akiko Uematsu, Junichi Hata, Yuji Komaki, Fumiko Seki, Chihoko Yamada, Norio Okahara, Yoko Kurotaki, Erika Sasaki, Hideyuki Okano
Brain development involves spatiotemporally complex microstructural changes. A number of neuropsychiatric disorders are linked to the neural processes of development and aging. Thus, it is important to understanding the typical developmental patterns of various brain structures, which will help to define critical periods of vulnerability for neural maturation, as well as anatomical mechanisms of brain structure-related neuropathology. In this study, we used magnetic resonance imaging to assess development of the orbitofrontal cortex, cingulate cortex, amygdala, and hippocampus in a non-human primate species, the common marmoset (Callithrix jacchus)...
September 15, 2017: NeuroImage
https://www.readbyqxmd.com/read/28922510/effects-of-spatial-smoothing-on-functional-brain-networks
#7
Tuomas Alakörkkö, Heini Saarimäki, Enrico Glerean, Jari Saramäki, Onerva Korhonen
Graph-theoretical methods have rapidly become a standard tool in studies of the structure and function of the human brain. Whereas the structural connectome can be fairly straightforwardly mapped onto a complex network, there are more degrees of freedom in constructing networks that represent functional connections between brain areas. For fMRI data, such networks are typically built by aggregating the BOLD signal time series of voxels into larger entities (such as Regions of Interest in some brain atlas), and determining their connection strengths from some measure of time-series correlations...
September 18, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28922355/image-identification-from-brain-activity-using-the-population-receptive-field-model
#8
Wietske Zuiderbaan, Ben M Harvey, Serge O Dumoulin
A goal of computational models is not only to explain experimental data but also to make new predictions. A current focus of computational neuroimaging is to predict features of the presented stimulus from measured brain signals. These computational neuroimaging approaches may be agnostic about the underlying neural processes or may be biologically inspired. Here, we use the biologically inspired population receptive field (pRF) approach to identify presented images from fMRI recordings of the visual cortex, using an explicit model of the underlying neural response selectivity...
2017: PloS One
https://www.readbyqxmd.com/read/28921863/gender-differences-in-brain-networks-during-verbal-sternberg-tasks-a-simultaneous-near-infrared-spectroscopy-and-electro-encephalography-study
#9
Chenyang Gao, Jinyan Sun, Xiaoquan Yang, Hui Gong
Gender differences in psychological processes have been of great interest in a variety of fields including verbal fluency, emotion processing, and working memory. Previous studies suggested that women outperform men in verbal working memory (VWM). However, the inherent mechanisms are still unclear. To obtain a deeper insight into the gender differences in brain networks in VWM, this study used near-infrared spectroscopy (NIRS) and electro-encephalography (EEG) simultaneously to investigate gender-related brain networks during verbal Sternberg tasks...
September 17, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28921724/-discrete-peaks-of-excitability-and-map-overlap-reveal-task-specific-organization-of-primary-motor-cortex-for-control-of-human-forearm-muscles
#10
Hugo Massé-Alarie, Michael J G Bergin, Cyril Schneider, Siobhan Schabrun, Paul W Hodges
The primary motor cortex (M1) presents a somatotopic organization of body parts, but with overlap between muscle/movement representations. This distinct but overlapping M1 organization is believed to be important for individuated control and movement coordination, respectively. Discrete peaks of greater excitability observed within M1 might underpin organization of cortical motor control. This study aimed to examine interactions between M1 representations of synergist and antagonist forearm muscles, compare regions of greater excitability during different functional tasks, and compare characteristics of M1 representation recorded using surface and fine-wire (fw ) electrodes...
September 17, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28921616/tangential-migration-of-corridor-guidepost-neurons-contributes-to-anxiety-circuits
#11
Andrea Tinterri, Marie Deck, Maryama Keita, Caroline Mailhes, Anna Noren Rubin, Nicoletta Kessaris, Ludmilla Lokmane, Franck Bielle, Sonia Garel
In mammals, thalamic axons are guided internally towards their neocortical target by corridor (Co) neurons that act as axonal guideposts. The existence of Co-like neurons in non-mammalian species, in which thalamic axons do not grow internally, raised the possibility that Co cells might have an ancestral role. Here, we investigated the contribution of corridor (Co) cells to mature brain circuits using a combination of genetic fate-mapping and assays in mice. We unexpectedly found that Co neurons contribute to striatal-like projection neurons in the central extended amygdala...
September 18, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28920933/modular-organization-of-the-brainstem-noradrenaline-system-coordinates-opposing-learning-states
#12
Akira Uematsu, Bao Zhen Tan, Edgar A Ycu, Jessica Sulkes Cuevas, Jenny Koivumaa, Felix Junyent, Eric J Kremer, Ilana B Witten, Karl Deisseroth, Joshua P Johansen
Noradrenaline modulates global brain states and diverse behaviors through what is traditionally believed to be a homogeneous cell population in the brainstem locus coeruleus (LC). However, it is unclear how LC coordinates disparate behavioral functions. We report a modular LC organization in rats, endowed with distinct neural projection patterns and coding properties for flexible specification of opposing behavioral learning states. LC projection mapping revealed functionally distinct cell modules with specific anatomical connectivity...
September 18, 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/28918694/brain-metabolic-correlates-of-fatigue-in-parkinson-s-disease-a-pet-study
#13
Li Zhang, Tiannv Li, Yongsheng Yuan, Qing Tong, Siming Jiang, Min Wang, Jianwei Wang, Jian Ding, Qinrong Xu, Kezhong Zhang
The neural bases of fatigue in Parkinson's disease (PD) remain uncertain. We aimed to assess the brain metabolic correlates of fatigue in patients with PD. Twenty-seven PD patients without clinically relevant depression (17-item Hamilton Depression Rating Scale [HAMD] score ≥ 14), apathy (Apathy Scale [AS] score ≥ 14) and excessive daytime somnolence (Epworth Sleepiness Scale [ESS] score ≥ 10) were evaluated with Fatigue Severity Scale (FSS). Each patient had an F-18 fluorodeoxyglucose PET (FDG-PET) scan...
September 18, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28918316/mr-guided-joint-reconstruction-of-activity-and-attenuation-in-brain-pet-mr
#14
Abolfazl Mehranian, Habib Zaidi, Andrew J Reader
With the advent of time-of-flight (TOF) PET scanners, joint maximum-likelihood reconstruction of activity and attenuation (MLAA) maps has recently regained attention for the estimation of PET attenuation maps from emission data. However, the estimated attenuation and activity maps are scaled by unknown scaling factors. We recently demonstrated that in hybrid PET-MR, the scaling issue of this algorithm can be effectively addressed by imposing MR spatial constraints on the estimation of attenuation maps using a penalized MLAA (P-MLAA(+)) algorithm...
September 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28917696/brain-mapping-in-multiple-sclerosis-lessons-learned-about-the-human-brain
#15
REVIEW
Massimo Filippi, Paolo Preziosa, Maria A Rocca
The application of structural and functional magnetic resonance imaging (MRI) techniques in patients with multiple sclerosis (MS) has certainly helped to improve our understanding of the mechanisms responsible for clinical disability and cognitive impairment in this condition. The numerous studies performed in MS patients have also provided many lessons on the structure-function relationships in the human brain, which could be applied to healthy subjects and to patients affected by other neurological conditions...
September 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28917660/stereotaxic-18-f-fdg-pet-and-mri-templates-with-three-dimensional-digital-atlas-for-statistical-parametric-mapping-analysis-of-tree-shrew-brain
#16
Qi Huang, Binbin Nie, Chen Ma, Jing Wang, Tianhao Zhang, Shaofeng Duan, Shang Wu, Shengxiang Liang, Panlong Li, Hua Liu, Hua Sun, Jiangning Zhou, Lin Xu, Baoci Shan
BACKGROUND: Tree shrews are proposed as an alternative animal model to nonhuman primates due to their close affinity to primates. Neuroimaging techniques are widely used to study brain functions and structures of humans and animals. However, tree shrews are rarely applied in neuroimaging field partly due to the lack of available species specific analysis methods. NEW METHOD: In this study, 10 PET/CT and 10 MRI images of tree shrew brain were used to construct PET and MRI templates; based on histological atlas we reconstructed a three-dimensional digital atlas with 628 structures delineated; then the digital atlas and templates were aligned into a stereotaxic space...
September 13, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28916867/reorganization-of-motor-representations-in-patients-with-brain-lesions-a-navigated-transcranial-magnetic-stimulation-study
#17
Lucia Bulubas, Nico Sollmann, Noriko Tanigawa, Claus Zimmer, Bernhard Meyer, Sandro M Krieg
This is an explorative study applying presurgical navigated transcranial magnetic stimulation (nTMS) to investigate the spatial distributions of motor sites to reveal tumor-induced brain plasticity in patients with brain tumors. We analyzed nTMS-based motor maps derived from presurgical mapping of 100 patients with motor eloquently located brain tumors (tumors in the frontal lobe, the precentral gyrus [PrG], the postcentral gyrus [PoG], the remaining parietal lobe, or the temporal lobe). Based on these motor maps, we systematically investigated changes in motor evoked potential (MEP) counts among 4 gyri (PrG, PoG, medial frontal gyrus, and superior frontal gyrus) between subgroups of patients according to the tumor location in order to depict the tumor's influence on reorganization...
September 15, 2017: Brain Topography
https://www.readbyqxmd.com/read/28916788/a-v0-core-neuronal-circuit-for-inspiration
#18
Jinjin Wu, Paolo Capelli, Julien Bouvier, Martyn Goulding, Silvia Arber, Gilles Fortin
Breathing in mammals relies on permanent rhythmic and bilaterally synchronized contractions of inspiratory pump muscles. These motor drives emerge from interactions between critical sets of brainstem neurons whose origins and synaptic ordered organization remain obscure. Here, we show, using a virus-based transsynaptic tracing strategy from the diaphragm muscle in the mouse, that the principal inspiratory premotor neurons share V0 identity with, and are connected by, neurons of the preBötzinger complex that paces inspiration...
September 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28913326/improvement-in-white-matter-tract-reconstruction-with-constrained-spherical-deconvolution-and-track-density-mapping-in-low-angular-resolution-data-a-pediatric-study-and-literature-review
#19
Benedetta Toselli, Domenico Tortora, Mariasavina Severino, Gabriele Arnulfo, Andrea Canessa, Giovanni Morana, Andrea Rossi, Marco Massimo Fato
INTRODUCTION: Diffusion-weighted magnetic resonance imaging (DW-MRI) allows noninvasive investigation of brain structure in vivo. Diffusion tensor imaging (DTI) is a frequently used application of DW-MRI that assumes a single main diffusion direction per voxel, and is therefore not well suited for reconstructing crossing fiber tracts. Among the solutions developed to overcome this problem, constrained spherical deconvolution with probabilistic tractography (CSD-PT) has provided superior quality results in clinical settings on adult subjects; however, it requires particular acquisition parameters and long sequences, which may limit clinical usage in the pediatric age group...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28913163/general-and-selective-brain-connectivity-alterations-in-essential-tremor-a-resting-state-fmri-study
#20
Karsten Mueller, Robert Jech, Martina Hoskovcová, Olga Ulmanová, Dušan Urgošík, Josef Vymazal, Evžen Růžička
Although essential tremor is the most common movement disorder, there is little knowledge about the pathophysiological mechanisms of this disease. Therefore, we explored brain connectivity based on slow spontaneous fluctuations of blood oxygenation level dependent (BOLD) signal in patients with essential tremor (ET). A cohort of 19 ET patients and 23 healthy individuals were scanned in resting condition using functional magnetic resonance imaging (fMRI). General connectivity was assessed by eigenvector centrality (EC) mapping...
2017: NeuroImage: Clinical
keyword
keyword
2446
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"