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Brain Imaging and Behavior

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https://www.readbyqxmd.com/read/28210930/emotion-specific-nocebo-effects-an-fmri-study
#1
Anne Schienle, Carina Höfler, Sonja Übel, Albert Wabnegger
The neurobiological mechanisms of nocebos are still poorly understood. Thirty-eight women participated in a 'smell study' using functional magnetic resonance imaging. They were presented with an odorless stimulus (distilled water) together with the verbal suggestion that this fluid has an aversive odor which enhances disgust feelings. The nocebo was presented while the participants viewed disgusting, fear-inducing, and neutral images. Participants' affective and neuronal responses during nocebo administration were compared with those in a control condition without nocebo...
February 16, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28197860/local-resting-state-functional-connectivity-in-autism-site-and-cohort-variability-and-the-effect-of-eye-status
#2
Sangeeta Nair, R Joanne Jao Keehn, Michael M Berkebile, José Omar Maximo, Natalia Witkowska, Ralph-Axel Müller
Autism spectrum disorder (ASD) is a neurodevelopmental disorder with prominent impairments in sociocommunicative abilities, which have been linked to anomalous brain network organization. Despite ample evidence of atypical long-distance connectivity, the literature on local connectivity remains small and divergent. We used resting-state functional MRI regional homogeneity (ReHo) as a local connectivity measure in comparative analyses across several well-matched low-motion subsamples from the Autism Brain Imaging Data Exchange and in-house data, with a grand total of 147 ASD and 184 typically developing (TD) participants, ages 7-18 years...
February 14, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28197859/imaging-the-up-s-and-down-s-of-emotion-regulation-in-lifetime-depression
#3
Sina Radke, Felix Hoffstaedter, Leonie Löffler, Lydia Kogler, Frank Schneider, Jens Blechert, Birgit Derntl
Reappraisal is a particularly effective strategy for influencing emotional experiences, specifically for reducing the impact of negative stimuli. Although depression has repeatedly been linked to dysfunctional behavioral and neural emotion regulation, prefrontal and amygdala engagement seems to vary with clinical characteristics and the specific regulation strategy used. Whereas previous neuroimaging research has focused on down-regulating reactions to emotionally evocative scenes, the current study compared up- and down-regulation in response to angry facial expressions in patients with depression and healthy individuals...
February 14, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28194558/structural-imaging-of-mild-traumatic-brain-injury-may-not-be-enough-overview-of-functional-and-metabolic-imaging-of-mild-traumatic-brain-injury
#4
REVIEW
Samuel S Shin, James W Bales, C Edward Dixon, Misun Hwang
A majority of patients with traumatic brain injury (TBI) present as mild injury with no findings on conventional clinical imaging methods. Due to this difficulty of imaging assessment on mild TBI patients, there has been much emphasis on the development of diffusion imaging modalities such as diffusion tensor imaging (DTI). However, basic science research in TBI shows that many of the functional and metabolic abnormalities in TBI may be present even in the absence of structural damage. Moreover, structural damage may be present at a microscopic and molecular level that is not detectable by structural imaging modality...
February 13, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28190161/brain-white-matter-structural-networks-in-patients-with-non-neuropsychiatric-systemic-lupus-erythematosus
#5
Ling Zhao, Xiangliang Tan, Junjing Wang, Kai Han, Meiqi Niu, Jun Xu, Xiaojin Liu, Xixi Zhao, Miao Zhong, Qin Huang, Yikai Xu, Ruiwang Huang
Previous neuroimaging studies have revealed cognitive dysfunction in patients with systemic lupus erythematosus (SLE) and suggested that it may be related to disrupted brain white matter (WM) connectivity. However, no study has examined the topological properties of brain WM structural networks in SLE patients, especially in patients with non-neuropsychiatric SLE (non-NPSLE). In this study, we acquired DTI datasets from 28 non-NPSLE patients and 24 healthy controls, constructed their brain WM structural networks by using a deterministic fiber tracking approach, estimated the topological parameters of their structural networks, and compared their group differences...
February 11, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28185062/decoupling-between-the-hand-territory-and-the-default-mode-network-after-bilateral-arm-transplantation-four-year-follow-up-case-study
#6
Carlos R Hernandez-Castillo, Jörn Diedrichsen, Erika Aguilar-Castañeda, Martin Iglesias
Several studies have suggested both a local and network reorganization of the sensorimotor system following amputation. Transplantation of a new limb results in a new shifting of cortical activity in the local territory of the transplanted limb. However, there is a lack of information about the reversibility of the abnormalities at the network level. The objective of this study was to characterize the functional connectivity changes between the cortical territory of the new hand and two intrinsic network of interest: the sensorimotor network (SMN) and the default mode network (DMN) of one patient whom received bilateral forearm transplants...
February 9, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28176263/multi-site-harmonization-of-diffusion-mri-data-in-a-registration-framework
#7
Hengameh Mirzaalian, Lipeng Ning, Peter Savadjiev, Ofer Pasternak, Sylvain Bouix, Oleg Michailovich, Sarina Karmacharya, Gerald Grant, Christine E Marx, Rajendra A Morey, Laura A Flashman, Mark S George, Thomas W McAllister, Norberto Andaluz, Lori Shutter, Raul Coimbra, Ross D Zafonte, Mike J Coleman, Marek Kubicki, Carl-Fredrik Westin, Murray B Stein, Martha E Shenton, Yogesh Rathi
Diffusion MRI (dMRI) data acquired on different scanners varies significantly in its content throughout the brain even if the acquisition parameters are nearly identical. Thus, proper harmonization of such data sets is necessary to increase the sample size and thereby the statistical power of neuroimaging studies. In this paper, we present a novel approach to harmonize dMRI data (the raw signal, instead of dMRI derived measures such as fractional anisotropy) using rotation invariant spherical harmonic (RISH) features embedded within a multi-modal image registration framework...
February 7, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28176262/modifications-in-resting-state-functional-anticorrelation-between-default-mode-network-and-dorsal-attention-network-comparison-among-young-adults-healthy-elders-and-mild-cognitive-impairment-patients
#8
Roberto Esposito, Filippo Cieri, Piero Chiacchiaretta, Nicoletta Cera, Mariella Lauriola, Massimo Di Giannantonio, Armando Tartaro, Antonio Ferretti
Resting state brain activity incorporates different components, including the Default Mode Network and the Dorsal Attention Network, also known as task-negative network and task-positive network respectively. These two networks typically show an anticorrelated activity during both spontaneous oscillations and task execution. However modifications of this anticorrelated activity pattern with age and pathology are still unclear. The present study aimed to investigate differences in resting state Default Mode Network-Dorsal Attention Network functional anticorrelation among young adults, healthy elders and Mild Cognitive Impairment patients...
February 7, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28130745/sex-attracts-neural-correlates-of-sexual-preference-under-cognitive-demand
#9
Kirsten Jordan, Katrin Wieser, Isabel Methfessel, Peter Fromberger, Peter Dechent, Jürgen L Müller
Neurofunctional correlates of sexual arousal are of interest in basic research as well as in clinical science. In forensic psychiatry, it is important to use designs which are potentially robust against susceptibility to manipulation or deception. We tested a new design to measure neurofunctional correlates of sexual preference. Twenty-two healthy heterosexual men had to solve a mental rotation task while sexually preferred or non-preferred distractors were presented simultaneously. With this challenging active task, subjects' possibility to manipulate their response to the sexual stimuli should be lower than in easier tasks and in passive designs...
January 27, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28130744/effects-of-social-adversity-and-hiv-on-subcortical-shape-and-neurocognitive-function
#10
April D Thames, Taylor P Kuhn, Zanjbeel Mahmood, Robert M Bilder, Timothy J Williamson, Elyse J Singer, Alyssa Arentoft
The purpose of the current study was to examine the independent and interactive effects of social adversity (SA) and HIV infection on subcortical shape alterations and cognitive functions. Participants included HIV+ (n = 70) and HIV- (n = 23) individuals who underwent MRI, neurocognitive and clinical assessment, in addition to completing questionnaires from which responses were used to create an SA score. Bilateral amygdalae and hippocampi were extracted from T1-weighted images. Parametric statistical analyses were used to compare the radial distance of the structure surface to a median curve to determine the presence of localized shape differences as a function of HIV, SA and their interaction...
January 27, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28116651/stemming-the-alzheimer-tsunami-introduction-to-the-special-issue-on-reserve-and-resilience-in-alzheimer-s-disease
#11
Ozioma C Okonkwo, Prashanthi Vemuri
No abstract text is available yet for this article.
January 23, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28108946/in-vivo-neuroimaging-and-behavioral-correlates-in-a-rat-model-of-chemotherapy-induced-cognitive-dysfunction
#12
Robert L Barry, Nellie E Byun, M Noor Tantawy, Chase A Mackey, George H Wilson, Adam J Stark, Michael P Flom, Laura C Gee, C Chad Quarles
Adjuvant chemotherapy has been used for decades to treat cancer, and it is well known that disruptions in cognitive function and memory are common chemotherapeutic adverse effects. However, studies using neuropsychological metrics have also reported group differences in cognitive function and memory before or without chemotherapy, suggesting that complex factors obscure the true etiology of chemotherapy-induced cognitive dysfunction (CICD) in humans. Therefore, to better understand possible mechanisms of CICD, we explored the effects of CICD in rats through cognition testing using novel object recognition (NOR) and contextual fear conditioning (CFC), and through metabolic neuroimaging via [(18)F]fluorodeoxyglucose (FDG) positron emission tomography (PET)...
January 20, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28108945/self-reported-confusion-is-related-to-global-and-regional-%C3%AE-amyloid-data-from-the-women-s-healthy-ageing-project
#13
Georgia E McCluskey, Paul Yates, Victor L Villemagne, Christopher Rowe, Cassandra E I Szoeke
Disease-modifying treatments for Alzheimer's disease (AD) may require implementation during early stages of β-amyloid accumulation, well before patients have objective cognitive decline. In this study we aimed to assess the clinical value of subjective cognitive impairment (SCI) by examining the cross-sectional relationship between β-amyloid load and SCI. Cerebral β-amyloid and SCI was assessed in a cohort of 112 cognitively normal subjects. Subjective cognition was evaluated using specific questions on memory and cognition and the MAC-Q...
January 20, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28102529/recovery-from-chemotherapy-induced-white-matter-changes-in-young-breast-cancer-survivors
#14
Thibo Billiet, Louise Emsell, Mathieu Vandenbulcke, Ronald Peeters, Daan Christiaens, Alexander Leemans, Wim Van Hecke, Ann Smeets, Frederic Amant, Stefan Sunaert, Sabine Deprez
In a previous longitudinal diffusion tensor imaging (DTI) study, we observed cerebral white matter (WM) alterations (reduced fractional anisotropy (FA)) related to decreased cognitive performance 3-5 months after chemotherapy-treatment (t2) when compared to baseline (t1) (Deprez et al. in Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology, 30(3), 274-281. doi:10.1200/JCO.2011.36.8571, 2012). The current study investigates the evolution and the nature of these previously observed microstructural changes...
January 19, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28102528/alteration-of-gray-matter-microstructure-in-schizophrenia
#15
Seitz Johanna, Rathi Yogesh, Lyall Amanda, Pasternak Ofer, Del Re Elisabetta C, Niznikiewicz Margaret, Nestor Paul, J Seidman Larry, L Petryshen Tracey, I Mesholam-Gately Raquelle, Wojcik Joanne, W McCarley Robert, E Shenton Martha, K Koerte Inga, Kubicki Marek
Neuroimaging studies demonstrate gray matter (GM) macrostructural abnormalities in patients with schizophrenia (SCZ). While ex-vivo and genetic studies suggest cellular pathology associated with abnormal neurodevelopmental processes in SCZ, few in-vivo measures have been proposed to target microstructural GM organization. Here, we use diffusion heterogeneity- to study GM microstructure in SCZ. Structural and diffusion magnetic resonance imaging (MRI) were acquired on a 3 Tesla scanner in 46 patients with SCZ and 37 matched healthy controls (HC)...
January 19, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28092023/white-matter-alterations-in-college-football-players-a-longitudinal-diffusion-tensor-imaging-study
#16
Michael Christian Mayinger, Kian Merchant-Borna, Jakob Hufschmidt, Marc Muehlmann, Isabelle Ruth Weir, Boris-Stephan Rauchmann, Martha Elizabeth Shenton, Inga Katharina Koerte, Jeffrey John Bazarian
The aim of this study was to evaluate longitudinal changes in the diffusion characteristics of brain white matter (WM) in collegiate athletes at three time points: prior to the start of the football season (T1), after one season of football (T2), followed by six months of no-contact rest (T3). Fifteen male collegiate football players and 5 male non-athlete student controls underwent diffusion MR imaging and computerized cognitive testing at all three timepoints. Whole-brain tract-based spatial statistics (TBSS) were used to compare fractional anisotropy (FA), radial diffusivity (RD), axial diffusivity (AD), and trace between all timepoints...
January 14, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28092022/relevance-of-neuroimaging-for-neurocognitive-and-behavioral-outcome-after-pediatric-traumatic-brain-injury
#17
Marsh Königs, Petra Jw Pouwels, L W Ernest van Heurn, Roel Bakx, R Jeroen Vermeulen, J Carel Goslings, Bwee Tien Poll-The, Marleen van der Wees, Coriene E Catsman-Berrevoets, Jaap Oosterlaan
This study aims to (1) investigate the neuropathology of mild to severe pediatric TBI and (2) elucidate the predictive value of conventional and innovative neuroimaging for functional outcome. Children aged 8-14 years with trauma control (TC) injury (n = 27) were compared to children with mild TBI and risk factors for complicated TBI (mild(RF+), n = 20) or moderate/severe TBI (n = 17) at 2.8 years post-injury. Neuroimaging measures included: acute computed tomography (CT), volumetric analysis on post-acute conventional T1-weighted magnetic resonance imaging (MRI) and post-acute diffusion tensor imaging (DTI, analyzed using tract-based spatial statistics and voxel-wise regression)...
January 14, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28083844/attention-and-processing-speed-performance-in-multiple-sclerosis-is-mostly-related-to-thalamic-volume
#18
Alvino Bisecco, Svetlana Stamenova, Giuseppina Caiazzo, Alessandro d'Ambrosio, Rosaria Sacco, Renato Docimo, Sabrina Esposito, Mario Cirillo, Fabrizio Esposito, Simona Bonavita, Gioacchino Tedeschi, Antonio Gallo
Cognitive impairment (CI), mainly involving attention and processing speed (A-PS), is a common and disabling symptom in multiple sclerosis (MS). Symbol Digit Modalities Test (SDMT) is one of the more sensitive and reliable tests to assess A-PS deficits in MS. Structural MRI correlates of A-PS in MS still need to be clarified. This study aimed to investigate, in a large group of MS patients, the relationship between regional gray matter (GM) atrophy and SDMT performance. 125 relapsing remitting MS patients and 52 healthy controls (HC) underwent a 3 T-MRI protocol including high-resolution 3D-T1 imaging...
January 12, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28078547/znf804a-rs1344706-interacts-with-comt-rs4680-to-affect-prefrontal-volume-in-healthy-adults
#19
Qiang Xu, Yongqin Xiong, Congcong Yuan, Feng Liu, Fangshi Zhao, Junlin Shen, Wen Qin, Chunshui Yu
The biological function of ZNF804A rs1344706, the first genome-wide supported risk variant of schizophrenia, remains largely unknown. Based on the upregulating effect of ZNF804A on the expression of COMT, we hypothesize that ZNF804A may affect grey matter volume (GMV) by interacting with COMT. Voxel-based morphometry was applied to analyze the main and interaction effects of ZNF804A rs1344706 and COMT rs4680 on brain GMV in 274 healthy young human subjects. The GMV of the left dorsolateral prefrontal cortex (DLPFC) showed a significant COMT rs4680 × ZNF804A rs1344706 interaction, manifesting as an inverted U-shape modulation by the presumed dopamine signaling...
January 11, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28070745/considering-total-intracranial-volume-and-other-nuisance-variables-in-brain-voxel-based-morphometry-in-idiopathic-pd
#20
Samuel Crowley, Haiqing Huang, Jared Tanner, Qing Zho, Nadine A Schwab, Loren Hizel, Daniel Ramon, Babette Brumback, Mingzhou Ding, Catherine C Price
Voxel-based morphometry (VBM) studies of Parkinson's disease (PD), have yielded mixed results, possibly due to several studies not accounting for common nuisance variables (age, sex, and total intracranial volume [TICV]). TICV is particularly important because there is evidence for larger TICV in PD. We explored the influence of these covariates on VBM by 1) comparing PD patients and controls before adding covariates, after adding age and sex, and after adding age, sex and TICV, and 2) by comparing controls split into large and small TICV before and after controlling for TICV, with age and sex accounted for in both analyses...
January 9, 2017: Brain Imaging and Behavior
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