keyword
MENU ▼
Read by QxMD icon Read
search

Freesurfer

keyword
https://www.readbyqxmd.com/read/28324681/morphometric-mri-features-are-associated-with-surgical-outcome-in-mesial-temporal-lobe-epilepsy-with-hippocampal-sclerosis
#1
Maria Teresa Fernandes Castilho Garcia, Larissa Botelho Gaça, Gabriel Barbosa Sandim, Idaiane Batista Assunção Leme, Henrique Carrete, Ricardo Silva Centeno, João Ricardo Sato, Elza Márcia Targas Yacubian
PURPOSE: Corticoamygdalohippocampectomy (CAH) improves seizure control, quality of life, and decreases mortality for refractory mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE-HS). One-third of patients continue having seizures, and it is pivotal to determine structural abnormalities that might influence the postoperative outcome. Studies indicate that nonhippocampal regions may play a role in the epileptogenic network in MTLE-HS and could generate seizures postoperatively...
March 1, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28294462/disruption-of-white-matter-structural-integrity-and-connectivity-in-posttraumatic-stress-disorder-a-tbss-and-tractography-study
#2
Elizabeth A Olson, Jiaolong Cui, Rena Fukunaga, Lisa D Nickerson, Scott L Rauch, Isabelle M Rosso
BACKGROUND: Most studies of brain white matter (WM) in posttraumatic stress disorder (PTSD) have focused on combat trauma, and often were confounded by neurological and substance dependence comorbidity. This study used tract-based spatial statistics (TBSS) and probabilistic tractography to characterize WM microstructure in a mixed-sex community sample of PTSD patients exposed to diverse and multiple traumas, and in trauma-exposed normal comparison (TENC) subjects. METHODS: TBSS compared diffusion measures between 20 adults with DSM-IV PTSD and 17 TENC, using a whole-brain voxel-wise approach...
March 15, 2017: Depression and Anxiety
https://www.readbyqxmd.com/read/28284155/cortical-signature-of-clock-drawing-performance-in-alzheimer-s-disease-and-mild-cognitive-impairment
#3
Dusan Hirjak, Robert C Wolf, Barbara Pfeifer, Katharina M Kubera, Anne K Thomann, Ulrich Seidl, Klaus H Maier-Hein, Johannes Schröder, Philipp A Thomann
It is unclear whether clock drawing test (CDT) performance relies on a widely distributed cortical network, or whether this test predominantly taps into parietal cortex function. So far, associations between cortical integrity and CDT impairment in Alzheimer's disease (AD) and mild cognitive impairment (MCI) largely stem from cortical volume analyses. Given that volume is a product of thickness and surface area, investigation of the relationship between CDT and these two cortical measures might contribute to better understanding of this cognitive screening tool for AD...
February 22, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28281317/hippocampal-formation-alterations-differently-contribute-to-autobiographic-memory-deficits-in-mild-cognitive-impairment-and-alzheimer-s-disease
#4
Dusan Hirjak, Robert C Wolf, Barbara Pfeifer, Ulrich Seidl, Anne K Thomann, Katharina M Kubera, Johannes Schröder, Klaus H Maier-Hein, Philipp A Thomann
BACKGROUND: Autobiographical memory (AM) is part of declarative memory and includes both semantic and episodic aspects. AM deficits are among the major complaints of patients with Alzheimer's disease (AD) even in early or preclinical stages. OBJECTIVES: Previous MRI studies AD patients have showed that deficits in semantic and episodic AM are associated with hippocampal alterations. However, the question which specific hippocampal subfields and adjacent extrahippocampal structures contribute to deficits of AM in individuals with mild cognitive impairment (MCI) and AD patients has not been investigated so far...
March 9, 2017: Hippocampus
https://www.readbyqxmd.com/read/28279988/entorhinal-cortex-antemortem-cortical-thickness-and-postmortem-neurofibrillary-tangles-and-amyloid-pathology
#5
A A Thaker, B D Weinberg, W P Dillon, C P Hess, H J Cabral, D A Fleischman, S E Leurgans, D A Bennett, B T Hyman, M S Albert, R J Killiany, B Fischl, A M Dale, R S Desikan
BACKGROUND AND PURPOSE: The entorhinal cortex, a critical gateway between the neocortex and hippocampus, is one of the earliest regions affected by Alzheimer disease-associated neurofibrillary tangle pathology. Although our prior work has automatically delineated an MR imaging-based measure of the entorhinal cortex, whether antemortem entorhinal cortex thickness is associated with postmortem tangle burden within the entorhinal cortex is still unknown. Our objective was to evaluate the relationship between antemortem MRI measures of entorhinal cortex thickness and postmortem neuropathological measures...
March 9, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28279814/a-critical-analysis-of-neuroanatomical-software-protocols-reveals-clinically-relevant-differences-in-parcellation-schemes
#6
Shadia Mikhael, Corné Hoogendoorn, Maria Valdes-Hernandez, Cyril Pernet
A high replicability in region-of-interest (ROI) morphometric or ROI-based connectivity analyses is essential for such methods to provide biomarkers of good health or disease. In this article, we focus on package design, and more specifically on cortical parcellation protocols, for novel insight into their contribution to inter-package differences. A critical analysis of cortical parcellation protocols from FreeSurfer, BrainSuite, BrainVISA and BrainGyrusMapping revealed major limitations. Details of reference populations are generally missing, cortical variability is not always explicitly accounted for and, more importantly, definition of gyral borders can be inconsistent...
March 7, 2017: NeuroImage
https://www.readbyqxmd.com/read/28273767/impairment-of-social-cognition-in-multiple-sclerosis-amygdala-atrophy-is-the-main-predictor
#7
Sonia Batista, Otília C d'Almeida, Ana Afonso, Sandra Freitas, Carmo Macário, Lívia Sousa, Miguel Castelo-Branco, Isabel Santana, Luís Cunha
BACKGROUND: Patients with multiple sclerosis (MS) frequently reveal social behavior disturbance. Nevertheless, little is known regarding the impact of MS on social cognition, particularly theory of mind (ToM), and its neural basis. OBJECTIVES: To explore how ToM is affected in MS and its neural correlates. METHODS: Enrolled 60 consecutive MS patients and 60 healthy controls (HC) matched on age, sex, and education. Participants underwent ToM testing (Eyes Test, Videos Test) and 3 T brain magnetic resonance imaging (MRI)...
December 1, 2016: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28271543/associations-between-pro-inflammatory-cytokines-learning-and-memory-in-late-life-depression-and-healthy-aging
#8
Rebecca A Charlton, Melissa Lamar, Aifeng Zhang, Xinguo Ren, Olusola Ajilore, Ghanshyam N Pandey, Anand Kumar
OBJECTIVES: Pro-inflammatory cytokines may play a role in learning and memory difficulties and may be exacerbated in late-life depression (LLD), where pro-inflammatory markers are already elevated because of aging and age-related vascular risk. METHODS: Learning and memory, and pro-inflammatory cytokines-Interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), and Interleukin-6 (IL-6) were measured in 24 individuals with LLD and 34 healthy older adults (HOA)...
March 8, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28262813/effects-of-dbs-in-parkinsonian-patients-depend-on-the-structural-integrity-of-frontal-cortex
#9
Muthuraman Muthuraman, Günther Deuschl, Nabin Koirala, Christian Riedel, Jens Volkmann, Sergiu Groppa
While deep brain stimulation of the subthalamic nucleus (STN-DBS) has evolved to an evidence-based standard treatment for Parkinson's disease (PD), the targeted cerebral networks are poorly described and no objective predictors for the postoperative clinical response exist. To elucidate the systemic mechanisms of DBS, we analysed cerebral grey matter properties using cortical thickness measurements and addressed the dependence of structural integrity on clinical outcome. Thirty one patients with idiopathic PD without dementia (23 males, age: 63...
March 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28261781/cognitive-impairment-and-hippocampal-atrophy-in-chronic-kidney-disease
#10
C-Y Chang, C-C Lin, C-F Tsai, W-C Yang, S-J Wang, F-H Lin, J-L Fuh
BACKGROUND: Cognition impairment is well known in patients with chronic kidney disease (CKD). The relationship between brain structure and cognitive performance in CKD patients is still under investigation. The study aimed to quantitatively assess the relationship between brain structure and cognitive performance in patients with CKD. METHODS: We recruited 39 patients with CKD and 39 age- and sex-matched control participants from a tertiary medical center. All participants underwent 3-T MRI scan neuropsychological assessments, and renal function tests...
March 5, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28259781/evaluating-accuracy-of-striatal-pallidal-and-thalamic-segmentation-methods-comparing-automated-approaches-to-manual-delineation
#11
Carolina Makowski, Sophie Béland, Penelope Kostopoulos, Nikhil Bhagwat, Gabriel A Devenyi, Ashok K Malla, Ridha Joober, Martin Lepage, M Mallar Chakravarty
Accurate automated quantification of subcortical structures is a greatly pursued endeavour in neuroimaging. In an effort to establish the validity and reliability of these methods in defining the striatum, globus pallidus, and thalamus, we investigated differences in volumetry between manual delineation and automated segmentations derived by widely used FreeSurfer and FSL packages, and a more recent segmentation method, the MAGeT-Brain algorithm. In a first set of experiments, the basal ganglia and thalamus of thirty subjects (15 first episode psychosis [FEP], 15 controls) were manually defined and compared to the labels generated by the three automated methods...
March 1, 2017: NeuroImage
https://www.readbyqxmd.com/read/28259655/accumbens-volumes-are-reduced-among-crack-cocaine-users
#12
Silvia Bassani Schuch-Goi, Pedro Domingues Goi, Mariane Bermudez, Leticia Schwanck Fara, Félix Paim Kessler, Flavio Pechansky, Clarissa Severino Gama, Raffael Massuda, Lisia von Diemen
The brain reward system is known to be the neuroanatomical basis of addictive behaviors. Systemic, cognitive and functional consequences of crack-cocaine addiction are clinically evident, but the neuroanatomical underpinnigs are not yet well understood. We aim to assess the neuroanatomical differences between crack-cocaine patients and paired healthy controls. Fifteen crack-cocaine patients recently discharged from the Addiction Unit of the Hospital de Clínicas de Porto Alegre and fifteen controls matched for gender, age, education and handedness were scanned using a Philips Achieva 1...
March 1, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28249819/oxidative-stress-and-brain-morphology-in-individuals-with-depression-anxiety-and-healthy-controls
#13
Laura S van Velzen, Madelief Wijdeveld, Catherine N Black, Marie-Jose van Tol, Nic J A van der Wee, Dick J Veltman, Brenda W J H Penninx, Lianne Schmaal
Oxidative stress is a biological process, caused by an imbalance between reactive oxygen species (ROS) and antioxidants, in favour of the ROS. This imbalance leads to oxidative damage to lipids, proteins and DNA and ultimately cell death. Studies in rodents have shown that the brain, particularly the amygdala and hippocampus, is sensitive to oxidative stress, although studies on the association between oxidative stress and brain morphology in humans are lacking. Oxidative stress has also been associated with major depressive disorder (MDD) and may be related to volumetric abnormalities in the amygdala and hippocampus in MDD and anxiety disorders...
February 26, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28239545/new-rapid-accurate-t2-quantification-detects-pathology-in-normal-appearing-brain-regions-of-relapsing-remitting-ms-patients
#14
Timothy M Shepherd, Ivan I Kirov, Erik Charlson, Mary Bruno, James Babb, Daniel K Sodickson, Noam Ben-Eliezer
INTRODUCTION: Quantitative T2 mapping may provide an objective biomarker for occult nervous tissue pathology in relapsing-remitting multiple sclerosis (RRMS). We applied a novel echo modulation curve (EMC) algorithm to identify T2 changes in normal-appearing brain regions of subjects with RRMS (N = 27) compared to age-matched controls (N = 38). METHODS: The EMC algorithm uses Bloch simulations to model T2 decay curves in multi-spin-echo MRI sequences, independent of scanner, and scan-settings...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28239524/pattern-of-gray-matter-volumes-related-to-retinal-thickness-and-its-association-with-cognitive-function-in-relapsing-remitting-ms
#15
Jan-Patrick Stellmann, Hanife Cetin, Kim Lea Young, Sibylle Hodecker, Jana Pöttgen, Diana Bittersohl, Andrea Hassenstein, Timm Oberwahrenbrock, Christoph Heesen, Susanne Siemonsen
BACKGROUND: Neurodegeneration in multiple sclerosis (MS) may be investigated in the visual system as optical coherence tomography (OCT) and magnetic resonance imaging (MRI) allows examining structural integrity in detail. The association between thickness of retinal layers and focal cortical volumes beyond the primary visual system has not been thoroughly investigated. OBJECTIVE: To investigate the association between focal cortical volume and thickness of retinal layers...
February 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28235816/corpus-callosal-atrophy-and-associations-with-cognitive-impairment-in-parkinson-disease
#16
Jennifer G Goldman, Ian O Bledsoe, Doug Merkitch, Vy Dinh, Bryan Bernard, Glenn T Stebbins
OBJECTIVE: To investigate atrophy of the corpus callosum on MRI in Parkinson disease (PD) and its relationship to cognitive impairment. METHODS: One hundred patients with PD and 24 healthy control participants underwent clinical and neuropsychological evaluations and structural MRI brain scans. Participants with PD were classified as cognitively normal (PD-NC; n = 28), having mild cognitive impairment (PD-MCI; n = 47), or having dementia (PDD; n = 25) by Movement Disorder Society criteria...
February 24, 2017: Neurology
https://www.readbyqxmd.com/read/28213120/a-cross-validated-cytoarchitectonic-atlas-of-the-human-ventral-visual-stream
#17
Mona Rosenke, Kevin S Weiner, Michael A Barnett, Karl Zilles, Katrin Amunts, Rainer Goebel, Kalanit Grill-Spector
The human ventral visual stream consists of several areas that are considered processing stages essential for perception and recognition. A fundamental microanatomical feature differentiating areas is cytoarchitecture, which refers to the distribution, size, and density of cells across cortical layers. Because cytoarchitectonic structure is measured in 20-micron-thick histological slices of postmortem tissue, it is difficult to assess (a) how anatomically consistent these areas are across brains and (b) how they relate to brain parcellations obtained with prevalent neuroimaging methods, acquired at the millimeter and centimeter scale...
February 16, 2017: NeuroImage
https://www.readbyqxmd.com/read/28210220/mri-based-classification-models-in-prediction-of-mild-cognitive-impairment-and-dementia-in-late-life-depression
#18
Aleksandra K Lebedeva, Eric Westman, Tom Borza, Mona K Beyer, Knut Engedal, Dag Aarsland, Geir Selbaek, Asta K Haberg
Objective: Late-life depression (LLD) is associated with development of different types of dementia. Identification of LLD patients, who will develop cognitive decline, i.e., the early stage of dementia would help to implement interventions earlier. The purpose of this study was to assess whether structural brain magnetic resonance imaging (MRI) in LLD patients can predict mild cognitive impairment (MCI) or dementia 1 year prior to the diagnosis. Methods: LLD patients underwent brain MRI at baseline and repeated clinical assessment after 1-year...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28203530/longitudinal-evaluation-of-cerebral-and-spinal-cord-damage-in-amyotrophic-lateral-sclerosis
#19
Milena de Albuquerque, Lucas Melo T Branco, Thiago Junqueira R Rezende, Helen Maia Tavares de Andrade, Anamarli Nucci, Marcondes Cavalcante França
OBJECTIVE: To evaluate MRI-based parameters as biomarkers of Amyotrophic Lateral Sclerosis (ALS) progression. METHODS: Twenty-seven patients and 27 controls performed two clinical and MRI acquisitions 8 months apart. ALSFRS-R scale was used to quantify disease severity at both time points. Multimodal analyses of MRI included cortical thickness measurements (FreeSurfer software), analysis of white matter integrity using diffusion-tensor imaging (tract-based spatial statistics-TBSS) and measurement of cervical spinal cord cross-sectional area (SpineSeg software)...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28198448/influence-of-fkbp5-polymorphism-and-dna-methylation-on-structural-changes-of-the-brain-in-major-depressive-disorder
#20
Kyu-Man Han, Eunsoo Won, Youngbo Sim, June Kang, Changsu Han, Yong-Ku Kim, Seung-Hyun Kim, Sook-Haeng Joe, Min-Soo Lee, Woo-Suk Tae, Byung-Joo Ham
A single nucleotide polymorphism of rs1360780 in the FKBP5 gene is associated with a predisposition to developing major depressive disorder (MDD). We investigated the interactive effects of FKBP5 rs1360780 allelic variants, DNA methylation, and the diagnosis of MDD on structural changes of the entire brain. One hundred and fourteen patients with MDD and eighty-eight healthy controls underwent T1-weighted structural magnetic resonance imaging and FKBP5 rs1360780 genotyping, including DNA methylation of intron 7...
February 15, 2017: Scientific Reports
keyword
keyword
16337
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"