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Brain Imaging and Behavior

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https://www.readbyqxmd.com/read/29779184/limbic-system-structure-volumes-and-associated-neurocognitive-functioning-in-former-nfl-players
#1
Christian Lepage, Marc Muehlmann, Yorghos Tripodis, Jakob Hufschmidt, Julie Stamm, Katie Green, Pawel Wrobel, Vivian Schultz, Isabelle Weir, Michael L Alosco, Christine M Baugh, Nathan G Fritts, Brett M Martin, Christine Chaisson, Michael J Coleman, Alexander P Lin, Ofer Pasternak, Nikos Makris, Robert A Stern, Martha E Shenton, Inga K Koerte
Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease associated with exposure to repetitive head impacts. CTE has been linked to disruptions in cognition, mood, and behavior. Unfortunately, the diagnosis of CTE can only be made post-mortem. Neuropathological evidence suggests limbic structures may provide an opportunity to characterize CTE in the living. Using 3 T magnetic resonance imaging, we compared select limbic brain regional volumes - the amygdala, hippocampus, and cingulate gyrus - between symptomatic former National Football League (NFL) players (n = 86) and controls (n = 22)...
May 19, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29774500/thalamocortical-dysconnectivity-in-premenstrual-syndrome
#2
Peng Liu, Ying Wei, Hai Liao, Yingying Fan, Ru Li, Nana Feng, Gaoxiong Duan, Demao Deng, Wei Qin
Premenstrual syndrome (PMS) is a menstrual cycle-related disorder. Although the precise pathophysiology is not fully understood, it is increasingly believed that the central nervous system plays a vital role in the development of PMS. The aim of this study is to elucidate specific functional connectivity between the thalamus and cerebral cortex. Resting-state functional magnetic resonance imaging (fMRI) data were obtained from 20 PMS patients and 21 healthy controls (HCs). Seed-based functional connectivity between the thalamus and six cortical regions of interest, including the prefrontal cortex (PFC), posterior parietal cortex, somatosensory cortex, motor cortex/supplementary motor area, temporal and occipital lobe, was adopted to identify specific thalamocortical connectivity in the two groups...
May 17, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29767303/the-neural-signatures-of-egocentric-bias-in-normative-decision-making
#3
Chunliang Feng, Xue Feng, Li Wang, Lili Wang, Ruolei Gu, Aiping Ni, Gopikrishna Deshpande, Zhihao Li, Yue-Jia Luo
Bargaining parties often disagree on what fair is, due to the reason that people are prone to believe that what favors oneself is fair, i.e., an egocentric bias. In this study, we investigated the neural signatures underlying egocentric bias in fairness decision-making, conjoining an adapted ultimatum game (UG) with event-related fMRI and functional connectivity. Participants earned monetary rewards with a partner in a production stage, wherein their contributions to the earnings were manipulated. Afterwards, the joint earnings were randomly divided, and the distribution was presented simultaneously with contribution information to participants, who accepted/rejected distributions of earnings as the same manner in standard UG...
May 16, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29767302/amyloid-causes-intermittent-network-disruptions-in-cognitively-intact-older-subjects
#4
Susanne G Mueller
Recent findings in AD models but also human patients suggest that amyloid can cause intermittent neuronal hyperactivity. The overall goal of this study was to use dynamic fMRI analysis combined with graph analysis to a) characterize the graph analytical signature of two types of intermittent hyperactivity (spike-like (spike) and hypersynchronus-like (synchron)) in simulated data and b) to attempt to identify one of these signatures in task-free fMRIs of cognitively intact subjects (CN) with or without increased brain amyloid...
May 16, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29766355/early-functional-mri-activation-predicts-motor-outcome-after-ischemic-stroke-a-longitudinal-multimodal-study
#5
Juan Du, Fang Yang, Zhiqiang Zhang, Jingze Hu, Qiang Xu, Jianping Hu, Fanyong Zeng, Guangming Lu, Xinfeng Liu
An accurate prediction of long term outcome after stroke is urgently required to provide early individualized neurorehabilitation. This study aimed to examine the added value of early neuroimaging measures and identify the best approaches for predicting motor outcome after stroke. This prospective study involved 34 first-ever ischemic stroke patients (time since stroke: 1-14 days) with upper limb impairment. All patients underwent baseline multimodal assessments that included clinical (age, motor impairment), neurophysiological (motor-evoked potentials, MEP) and neuroimaging (diffusion tensor imaging and motor task-based fMRI) measures, and also underwent reassessment 3 months after stroke...
May 15, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29761321/correction-to-reduced-interference-in-working-memory-following-mindfulness-training-is-associated-with-increases-in-hippocampal-volume
#6
Jonathan Greenberg, Victoria L Romero, Seth Elkin-Frankston, Matthew A Bezdek, Eric H Schumacher, Sara W Lazar
The article Reduced interference in working memory following mindfulness training is associated with increases in hippocampal volume, written by Jonathan Greenberg, Victoria L. Romero, Seth Elkin-Frankston, Matthew A. Bezdek, Eric H. Schumacher, and Sara W. Lazar.
May 15, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29752654/reduced-hemispheric-asymmetry-of-brain-anatomical-networks-in-attention-deficit-hyperactivity-disorder
#7
Dandan Li, Ting Li, Yan Niu, Jie Xiang, Rui Cao, Bo Liu, Hui Zhang, Bin Wang
Despite many studies reporting a variety of alterations in brain networks in patients with attention deficit hyperactivity disorder (ADHD), alterations in hemispheric anatomical networks are still unclear. In this study, we investigated topology alterations in hemispheric white matter in patients with ADHD and the relationship between these alterations and clinical features of the illness. Weighted hemispheric brain anatomical networks were first constructed for each of 40 right-handed patients with ADHD and 53 matched normal controls...
May 11, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29752653/imaging-neurodegeneration-in-down-syndrome-brain-templates-for-amyloid-burden-and-tissue-segmentation
#8
Patrick J Lao, Ben L Handen, Tobey J Betthauser, Karly A Cody, Annie D Cohen, Dana L Tudorascu, Charles K Stone, Julie C Price, Sterling C Johnson, William E Klunk, Bradley T Christian
The focus of Alzheimer's disease (AD) neuroimaging research has shifted towards an investigation of the earliest stages of AD pathogenesis, which manifests in every young adult with Down syndrome (DS; trisomy 21) resulting from a deterministic genetic predisposition to amyloid precursor protein overproduction. Due to morphological differences in brain structure in the DS population, special consideration must be given to processing pipelines and the use of normative atlases developed for the non-DS population...
May 11, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29748773/preliminary-evidence-of-altered-gray-matter-volume-in-subjects-with-internet-gaming-disorder-associations-with-history-of-childhood-attention-deficit-hyperactivity-disorder-symptoms
#9
Deokjong Lee, Kee Namkoong, Junghan Lee, Young-Chul Jung
Attention-deficit/hyperactivity disorder (ADHD) is commonly comorbid with Internet gaming disorder (IGD). Although childhood ADHD symptoms may decline during late brain maturation, structural alterations in some brain areas may persist into adulthood. This study investigated whether young adults with IGD and a history of childhood ADHD symptoms had gray matter volume (GMV) alterations that were distinct from subjects without a history of childhood ADHD. As an exploratory investigation, we conducted a whole-brain voxel-based morphometry with the diffeomorphic anatomical registration using an exponentiated Lie algebra algorithm and applied an uncorrected threshold at the voxel level for multiple comparisons...
May 11, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29748772/decreased-cortical-and-subcortical-response-to-inhibition-control-after-sleep-deprivation
#10
Rui Zhao, Xinxin Zhang, Ningbo Fei, Yuanqiang Zhu, Jinbo Sun, Peng Liu, Xuejuan Yang, Wei Qin
The effects of sleep deprivation (SD) on the neural substrates of inhibition control are poorly understood. Here we used functional magnetic resonance imaging to examine the effects of 24 h of SD on cerebral activation during a stop-signal task in 20 normal young subjects. Behaviorally, subjects showed significantly delayed stop-signal reaction time (SSRT) following SD. In addition, reduced cerebral activation was found in the "stopping network" (including the inferior frontal gyrus [IFG], supplementary motor area, subthalamic nucleus [STN] and insula) and vision-related regions (occipital cortex, lingual gyrus and fusiform gyrus) after SD...
May 10, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29748771/inhibition-impairment-in-frontotemporal-dementia-amyotrophic-lateral-sclerosis-and-alzheimer-s-disease-clinical-assessment-and-metabolic-correlates
#11
Jordi A Matías-Guiu, María Nieves Cabrera-Martín, María Valles-Salgado, Teresa Rognoni, Lucía Galán, Teresa Moreno-Ramos, José Luis Carreras, Jorge Matías-Guiu
The ability to reject an automatic tendency, i.e. inhibition, has been linked to the prefrontal cortex, but its neural underpinnings are still controversial. Neurodegenerative diseases represent an interesting model to explore this issue, given its frequent impairment in these disorders. We investigated the inhibitory impairment and its neural basis using four different tests, which evaluate the presence of inhibitory dysfunction (Stroop test, Hayling test, and two graphical perseveration tests), and assessed their correlation with brain metabolism using 18 F-fluorodeoxyglucose positron emission tomography in a group of 76 participants with behavioral variant frontotemporal dementia (bvFTD), Alzheimer's disease (AD), amyotrophic lateral sclerosis (ALS) and healthy controls (HC)...
May 10, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29748770/a-systematic-review-of-associations-between-functional-mri-activity-and-polygenic-risk-for-schizophrenia-and-bipolar-disorder
#12
REVIEW
Zalina Dezhina, Siri Ranlund, Marinos Kyriakopoulos, Steve C R Williams, Danai Dima
Genetic factors account for up to 80% of the liability for schizophrenia (SCZ) and bipolar disorder (BD). Genome-wide association studies have successfully identified several genes associated with increased risk for both disorders. This has allowed researchers to model the aggregate effect of genes associated with disease status and create a polygenic risk score (PGRS) for each individual. The interest in imaging genetics using PGRS has grown in recent years, with several studies now published. We have conducted a systematic review to examine the effects of PGRS of SCZ, BD and cross psychiatric disorders on brain function and connectivity using fMRI data...
May 10, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29744804/frontal-lobe-functioning-during-a-simple-response-conflict-task-in-first-episode-psychosis-and-its-relationship-to-treatment-response
#13
Keith M Shafritz, Toshikazu Ikuta, Allison Greene, Delbert G Robinson, Juan Gallego, Todd Lencz, Pamela DeRosse, Peter B Kingsley, Philip R Szeszko
Prior functional magnetic resonance imaging (fMRI) studies have investigated the neural mechanisms underlying cognitive control in patients with psychosis with findings of both hypo- and hyperfrontality. One factor that may contribute to inconsistent findings is the use of complex and polyfactorial tasks to investigate frontal lobe functioning. In the current study we employed a simple response conflict task during fMRI to examine differences in brain activation between patients experiencing their first-episode of psychosis (n = 33) and age- and sex-matched healthy volunteers (n = 33)...
May 9, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29744803/prediction-of-future-weight-change-with-the-dopamine-transporter
#14
Kyoungjune Pak, Keunyoung Kim, Myung Jun Lee, Jae Meen Lee, Bum Soo Kim, Seong-Jang Kim, In Joo Kim
The brain plays a critical role in controlling and inhibiting pre-potent responses to foods. We investigated the predictive value of dopamine transporter (DAT) availability in the striatum of healthy subjects using 123 I-FP-CIT single-photon emission computed tomography (SPECT). In total, 84 participants with available data on their weight for the 60 months after SPECT were included. Specific binding of 123 I-FP-CIT to DAT was calculated using region-of-interest analysis, and the putamen-to-caudate nucleus ratio (PCR) was determined...
May 9, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29744802/the-role-of-the-insula-in-intuitive-expert-bug-detection-in-computer-code-an-fmri-study
#15
Joao Castelhano, Isabel C Duarte, Carlos Ferreira, Joao Duraes, Henrique Madeira, Miguel Castelo-Branco
Software programming is a complex and relatively recent human activity, involving the integration of mathematical, recursive thinking and language processing. The neural correlates of this recent human activity are still poorly understood. Error monitoring during this type of task, requiring the integration of language, logical symbol manipulation and other mathematical skills, is particularly challenging. We therefore aimed to investigate the neural correlates of decision-making during source code understanding and mental manipulation in professional participants with high expertise...
May 9, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29744801/a-decade-of-changes-in-brain-volume-and-cognition
#16
Rowa Aljondi, Cassandra Szoeke, Chris Steward, Paul Yates, Patricia Desmond
Brain atrophy can occur several decades prior to onset of cognitive impairments. However, few longitudinal studies have examined the relationship between brain volume changes and cognition over a long follow-up period in healthy elderly women. In the present study we investigate the relationship between whole brain and hippocampal atrophy rates and longitudinal changes in cognition, including verbal episodic memory and executive function, in older women. We also examine whether baseline brain volume predicts subsequent changes in cognitive performance over a 10-year period...
May 9, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29744800/trait-and-state-patterns-of-basolateral-amygdala-connectivity-at-rest-are-related-to-endogenous-testosterone-and-aggression-in-healthy-young-women
#17
Macià Buades-Rotger, Christin Engelke, Ulrike M Krämer
The steroid hormone testosterone (T) has been suggested to influence reactive aggression upon its action on the basolateral amygdala (BLA), a key brain region for threat detection. However, it is unclear whether T modulates resting-state functional connectivity (rsFC) of the BLA, and whether this predicts subsequent aggressive behavior. Aggressive interactions themselves, which often induce changes in T concentrations, could further alter BLA rsFC, but this too remains untested. Here we investigated the effect of endogenous T on rsFC of the BLA at baseline as well as after an aggressive encounter, and whether this was related to behavioral aggression in healthy young women (n = 39)...
May 9, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29744799/dti-derived-indexes-of-brain-wm-correlate-with-cognitive-performance-in-vascular-mci-and-small-vessel-disease-a-tbss-study
#18
Mario Mascalchi, Emilia Salvadori, Nicola Toschi, Marco Giannelli, Stefano Orsolini, Stefano Ciulli, Andrea Ginestroni, Anna Poggesi, Antonio Giorgio, Francesca Lorenzini, Marco Pasi, Nicola De Stefano, Leonardo Pantoni, Domenico Inzitari, Stefano Diciotti
Indexes derived from diffusion tensor imaging (DTI) are sensitive to changes of both T2-hyperintense and normal-appearing brain white matter (WM) in elderly subjects with variable cognitive status. We investigated correlations between global cognitive performance and DTI-derived indexes along the WM tracts in the brain of patients with vascular mild cognitive impairment (MCI) and small vessel disease (SVD). Seventy-six patients with vascular MCI and SVD were assessed through Montreal Cognitive Assessment (MoCA) and Mini Mental State Examination (MMSE) test and underwent DTI examination on a 1...
May 9, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29744798/the-effect-of-future-time-perspective-on-procrastination-the-role-of-parahippocampal-gyrus-and-ventromedial-prefrontal-cortex
#19
Peiwei Liu, Tingyong Feng
Procrastination is an almost universal affliction, which occurs across culture and brings serious consequences across multiple fields, such as finance, health and education. Previous research has showed procrastination can be influenced by future time perspective (FTP). However, little is known about the neural basis underlying the impact of FTP on procrastination. To address this question, we used voxel-based morphometry (VBM) based on brain structure. In line with previous findings, the behavioral result indicated that FTP inventory scores were significantly negatively correlated with procrastination inventory scores (r = -0...
May 9, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29744797/the-role-of-medial-prefrontal-cortex-in-processing-emotional-self-referential-information-a-combined-tms-fmri-study
#20
Nicola De Pisapia, Guido Barchiesi, Jorge Jovicich, Luigi Cattaneo
In this study we investigate the neural basis of emotional content in self-referential processing by using a combination of off-line repetitive Transcranial Magnetic Stimulation (rTMS) applied to the medial prefrontal cortex (mPFC) and whole-brain functional Magnetic Resonance Imaging (fMRI).We applied effective or ineffective (sham) 1-Hz rTMS to the mPFC of 14 healthy participants who immediately thereafter underwent fMRI while performing a personality attribution task to self or to others. rTMS produced an increase in the participants' reaction time (≈ 60 msec) when processing negative attributes...
May 9, 2018: Brain Imaging and Behavior
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