Read by QxMD icon Read

voxel based morphometry

Francesca Zanderigo, Spiro Pantazatos, Harry Rubin-Falcone, R Todd Ogden, Binod Thapa Chhetry, Gregory Sullivan, Maria Oquendo, Jeffrey M Miller, J John Mann
Serotonin 1A (5-HT1A ) receptors mediate serotonin trophic role in brain neurogenesis. Gray matter volume (GMV) loss and 5-HT1A receptor binding alterations have been identified in major depressive disorder (MDD). Here we investigated the relationship between 5-HT1A receptor binding and GMV in 40 healthy controls (HCs) and, for the first time, 47 antidepressant-free MDD patients using Voxel-Based Morphometry and [11 C]WAY100635 Positron Emission Tomography. Values of GMV and 5-HT1A binding (expressed as BPF , one of the types of binding potentials that refer to displaceable or specific binding that can be quantified in vivo with PET) were obtained in 13 regions of interest, including raphe, and at the voxel level...
March 17, 2018: Brain Structure & Function
Diego L Lorca-Puls, Andrea Gajardo-Vidal, Jitrachote White, Mohamed L Seghier, Alexander P Leff, David W Green, Jenny T Crinion, Philipp Ludersdorfer, Thomas M H Hope, Howard Bowman, Cathy J Price
This study investigated how sample size affects the reproducibility of findings from univariate voxel-based lesion-deficit analyses (e.g., voxel-based lesion-symptom mapping and voxel-based morphometry). Our effect of interest was the strength of the mapping between brain damage and speech articulation difficulties, as measured in terms of the proportion of variance explained. First, we identified a region of interest by searching on a voxel-by-voxel basis for brain areas where greater lesion load was associated with poorer speech articulation using a large sample of 360 right-handed English-speaking stroke survivors...
March 14, 2018: Neuropsychologia
R Sheelakumari, C Kesavadas, V S Lekha, Sunitha Justus, P Sankara Sarma, Ramshekhar Menon
Context: Annually 10-12% of patients with mild cognitive impairment (MCI) are likely to progress to Alzheimer's Disease (AD). The morphometric profile in stable non-converters has not been adequately characterized. Aims: To determine the structural differences between amnestic MCI and early AD using volumetric magnetic resonance imaging (MRI) and its correlation with neuropsychological test performances. Settings and Design: This was a hospital-based case-control study...
March 2018: Neurology India
Per F Nordmark, Christina Ljungberg, Roland S Johansson
Transection of the median nerve typically causes lifelong restriction of fine sensory and motor skills of the affected hand despite the best available surgical treatment. Inspired by recent findings on activity-dependent structural plasticity of the adult brain, we used voxel-based morphometry to analyze the brains of 16 right-handed adults who more than two years earlier had suffered injury to the left or right median nerve followed by microsurgical repair. Healthy individuals served as matched controls. Irrespective of side of injury, we observed gray matter reductions in left ventral and right dorsal premotor cortex, and white matter reductions in commissural pathways interconnecting those motor areas...
March 14, 2018: Scientific Reports
Ondrej Bezdicek, Tommaso Ballarini, Filip Růžička, Jan Roth, Karsten Mueller, Robert Jech, Matthias L Schroeter
Mild cognitive impairment (MCI) affects approximately one-third of non-demented Parkinson's Disease (PD) patients. We aimed at investigating the neural correlates of MCI in PD combining multimodal magnetic resonance imaging (MRI) with large-scale data from the literature. We analyzed 31 PD patients and 30 matched controls. The standard neuropsychological assessment of PD-MCI covered memory, attention, executive functions, language and visuospatial abilities. Following validated criteria, 16 patients were classified as showing MCI...
March 11, 2018: Neuropsychologia
Masataka Tanaka, Naoki Tani, Tomoyuki Maruo, Satoru Oshino, Koichi Hosomi, Youichi Saitoh, Haruhiko Kishima
OBJECTIVE: The aim of this study was to investigate the incidence of and risk factors for postoperative delirium (POD) after deep brain stimulation (DBS) surgery in patients with Parkinson's disease (PD). METHODS: We analyzed the preoperative T1-weigthed magnetic resonance imaging data of 71 PD patients who underwent DBS surgery. Multiple regression analysis was done with age, l-dopa equivalent daily dose, laterality of the surgery, target regions, number of electrode trajectories tried, grey matter (GM) volume, and white matter (WM) volume as explanatory variables and the duration (number of days) of POD as the response variable...
March 9, 2018: World Neurosurgery
Marta Gómez-Sancho, Jussi Tohka, Vanessa Gómez-Verdejo
Alzheimer's Disease (AD) is a progressive neurological disorder in which the death of brain cells causes memory loss and cognitive decline. The identification of at-risk subjects yet showing no dementia symptoms but who will later convert to AD can be crucial for the effective treatment of AD. For this, Magnetic Resonance Imaging (MRI) is expected to play a crucial role. During recent years, several Machine Learning (ML) approaches to AD-conversion prediction have been proposed using different types of MRI features...
March 9, 2018: Magnetic Resonance Imaging
Katherine E Manning, Roger Tait, John Suckling, Anthony J Holland
Prader-Willi syndrome (PWS) is a neurodevelopmental disorder of genomic imprinting, presenting with a characteristic overeating disorder, mild to moderate intellectual disability, and a variable range of social and behavioral difficulties. Consequently, widespread alterations in neural structure and developmental and maturational trajectory would be expected. To date, there have been few quantitative and systematic studies of brain morphology in PWS, although alterations of volume and of cortical organisation have been reported...
2018: NeuroImage: Clinical
Nora Maria Raschle, Willeke Martine Menks, Lynn Valérie Fehlbaum, Martin Steppan, Areti Smaragdi, Karen Gonzalez-Madruga, Jack Rogers, Roberta Clanton, Gregor Kohls, Anne Martinelli, Anka Bernhard, Kerstin Konrad, Beate Herpertz-Dahlmann, Christine M Freitag, Graeme Fairchild, Stephane A De Brito, Christina Stadler
Callous-unemotional traits are characterized by a lack of empathy, a disregard for others' feelings and shallow or deficient affect, such as a lack of remorse or guilt. Neuroanatomical correlates of callous-unemotional traits have been demonstrated in clinical samples (i.e., adolescents with disruptive behavior disorders). However, it is unknown whether callous-unemotional traits are associated with neuroanatomical correlates within normative populations without clinical levels of aggression or antisocial behavior...
2018: NeuroImage: Clinical
Julian Macoveanu, William Baaré, Kristoffer H Madsen, Lars Vedel Kessing, Hartwig Roman Siebner, Maj Vinberg
Background: Major depression and bipolar disorders aggregates in families and are linked with a wide range of neurobiological abnormalities including cortical gray matter (GM) alterations. Prospective studies of individuals at familial risk may expose the neural mechanisms underlying risk transmission. Methods: We used voxel based morphometry to investigate changes in regional GM brain volume, over a seven-year period, in 37 initially healthy individuals having a mono- or di-zygotic twin diagnosed with major depression or bipolar disorder (high-risk group; mean age 41...
2018: NeuroImage: Clinical
Thibo Billiet, Iris Elens, Charlotte Sleurs, Anne Uyttebroeck, Rudi D'Hooge, Jurgen Lemiere, Sabine Deprez
Background: This study aimed to assess functional and structural brain connectivity in adult childhood leukemia survivors and the link with cognitive functioning and previously identified risk factors such as intrathecal methotrexate dose and age at start of therapy. Methods: Thirty-one nonirradiated adult childhood leukemia survivors and 35 controls underwent cognitive testing and multimodal magnetic resonance imaging (resting state functional MRI, T1-weighted, diffusion-weighted, and myelin water imaging [MWI])...
March 5, 2018: Journal of the National Cancer Institute
Alyssa Caplan, Gabe Marx, Jonathan Elofson, Claire Lis, Lea Grinberg, Bruce Miller, Howard Rosen
Neurodegenerative diseases are caused by aggregation of specific proteins that catalyze a cascade of changes that ultimately lead to neurodegeneration. This concept guides current diagnostic approaches, as well as clinical trials, that focus on detecting or removing amyloid or tau from the brain. The semantic variant of primary progressive aphasia (svPPA), a clinical syndrome associated with frontotemporal lobar degeneration (FTLD) pathology, is usually associated with the molecular pathology TDP-C, but there are cases with TDP-B and Pick's disease...
March 6, 2018: Neurocase
Roxana G Burciu, Rachael D Seidler, Priyank Shukla, Mike A Nalls, Andrew B Singleton, Michael S Okun, David E Vaillancourt
The single-nucleotide polymorphism rs356219 in the α-synuclein (SNCA) gene has been shown to significantly contribute to an earlier age at onset of Parkinson's disease (PD), and regulates SNCA expression in PD brain regions, blood, and plasma. Here, we used multimodal magnetic resonance imaging (MRI) to study healthy adults with and without the rs356219 risk genotype. Motor and cognitive tests were administered, and all participants underwent functional and structural MRI. Imaging analyses included (1) task-based functional MRI; (2) task-based functional connectivity; (3) free-water diffusion MRI of the substantia nigra; (4) voxel-based morphometry; and (5) surface-based morphometry...
February 10, 2018: Neurobiology of Aging
Keren Bachi, Muhammad A Parvaz, Scott J Moeller, Gabriela Gan, Anna Zilverstand, Rita Z Goldstein, Nelly Alia-Klein
Background : Childhood trauma affects neurodevelopment and promotes vulnerability to impaired constraint, depression, and addiction. Reduced gray matter concentration (GMC) in the mesocorticolimbic regions implicated in reward processing and cognitive control may be an underlying substrate, as documented separately in addiction and for childhood trauma. The purpose of this study was to understand the contribution of childhood maltreatment to GMC effects in individuals with cocaine use disorder. Methods : Individuals with cocaine use disorder were partitioned into groups of low vs...
2018: Frontiers in Human Neuroscience
Fabian Rottstädt, Pengfei Han, Kerstin Weidner, Julia Schellong, Sylvia Wolff-Stephan, Timmy Strauß, Hagen Kitzler, Thomas Hummel, Ilona Croy
BACKGROUND: Removal of the olfactory bulb (OB) leads to depression like behavior in rodents. A link between depression and olfactory function is also established in humans. We hypothesized that the human OB volume relates to depressive state and tested whether such a potential coherence is moderated by structural alterations in other brain regions. METHODS: Eighty-three participants (32 patients with major depression and 51 matched healthy controls) underwent structural MR scanning...
February 28, 2018: Human Brain Mapping
Laura Zamarian, Christoph Scherfler, Christian Kremser, Marie-Theres Pertl, Elke Gizewski, Thomas Benke, Margarete Delazer
Acquisition of numerical knowledge and understanding of numerical information are crucial for coping with the changing demands of our digital society. In this study, we assessed arithmetic learning in older and younger individuals in a training experiment including brain imaging. In particular, we assessed age-related effects of training intensity, prior arithmetic competence, and neuropsychological variables on the acquisition of new arithmetic knowledge and on the transfer to new, unknown problems. Effects were assessed immediately after training and after 3 months...
2018: PloS One
Geoff Davies, Charlotte L Rae, Sarah N Garfinkel, Anil K Seth, Nick Medford, Hugo D Critchley, Kathryn Greenwood
INTRODUCTION: Metacognition, or "thinking about thinking", is a higher-order thought process that allows for the evaluation of perceptual processes for accuracy. Metacognitive accuracy is associated with the grey matter volume (GMV) in the prefrontal cortex (PFC), an area also impacted in schizophrenia. The present study set out to investigate whether deficits in metacognitive accuracy are present in the early stages of psychosis. METHODS: Metacognitive accuracy in first-episode psychosis (FEP) was assessed on a perceptual decision-making task and their performance compared to matched healthy control participants (N = 18)...
February 27, 2018: Cognitive Neuropsychiatry
Isabel Arend, Kenneth Yuen, Nitzan Sagi, Avishai Henik
In synaesthesia, a specific sensory dimension leads to an involuntary sensation in another sensory dimension not commonly associated with it; for example, synaesthetes may experience a specific colour when listening or thinking of numbers or letters. Large-scale behavioural studies provide a rich description of different synaesthesia phenotypes, and a great amount of research has been oriented to uncovering whether a single or multiple brain mechanisms underlie these various synaesthesia phenotypes. Interestingly, most of the synaesthetic inducers are conceptual stimuli such as numbers, letters, and months...
February 7, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
Malin Björnsdotter, Monika Davidovic, Louise Karjalainen, Göran Starck, Håkan Olausson, Elisabet Wentz
BACKGROUND: Patients with anorexia nervosa exhibit higher levels of behaviours typically associated with autism-spectrum disorder (ASD), but the neural basis is unclear. We sought to determine whether elevated autistic traits in women with anorexia nervosa may be reflected in cortical morphology. METHODS: We used voxel-based morphometry (VBM) to examine regional grey matter volumes in high-resolution MRI structural brain scans in women with anorexia nervosa and matched healthy controls...
March 2018: Journal of Psychiatry & Neuroscience: JPN
Paula Squarzoni, Fabio Luis Souza Duran, Geraldo F Busatto, Tania Correa Toledo de Ferraz Alves
BACKGROUND: Many cross-sectional voxel-based morphometry (VBM) investigations have shown significant inverse correlations between chronological age and gray matter (GM) volume in several brain regions in healthy humans. However, few VBM studies have documented GM decrements in the healthy elderly with repeated MRI measurements obtained in the same subjects. Also, the extent to which the APOE ɛ4 allele influences longitudinal findings of GM reduction in the healthy elderly is unclear...
2018: Journal of Alzheimer's Disease: JAD
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"