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https://www.readbyqxmd.com/read/28655152/faulty-adaptation-to-repeated-face-name-associative-pairs-in-mild-cognitive-impairment-is-predictive-of-cognitive-decline
#1
Sarah M Jurick, Gali H Weissberger, Lindsay R Clark, Christina E Wierenga, Yu-Ling Chang, Dawn M Schiehser, S Duke Han, Amy J Jak, Sheena I Dev, Mark W Bondi
Objective: We examined BOLD (Blood-Oxygen-Level Dependent) activity reduction upon stimuli repetition of face-name pairs in older adults with amnestic (aMCI) and non-amnestic (naMCI) mild cognitive impairment diagnosed using a comprehensive actuarial method, and relationships between activity reduction and behavioral indices. Method: Twenty-nine cognitively healthy older adults (CHs) and 20 with MCI (n = 12 aMCI; n = 8 naMCI) underwent functional MRI event-related imaging, a comprehensive neuropsychological battery, and 1-year follow-up exam...
June 26, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28654893/aberrant-patterns-of-local-and-long-range-functional-connectivity-densities-in-schizophrenia
#2
Chuanxin Liu, Wei Zhang, Guangdong Chen, Hongjun Tian, Jie Li, Hongru Qu, Langlang Cheng, Jingjing Zhu, Chuanjun Zhuo
Schizophrenia is a disorder of brain dysconnectivity, and both the connection strength and connection number are disrupted in patients with schizophrenia. The functional connectivity density (FCD) can reflect alterations in the connection number. Alterations in the global FCD (gFCD) in schizophrenia were previously demonstrated; however, alterations in two other indices of the pathological characteristics of the brain, local FCD (lFCD) and long-range FCD (lrFCD), have not been revealed. To investigate lFCD and lrFCD alterations in patients with schizophrenia, 95 patients and 93 matched healthy controls were examined using structural and resting-state functional magnetic resonance imaging scanning...
June 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28654038/rewiring-neuronal-circuits-a-new-method-for-fast-neurite-extension-and-functional-neuronal-connection
#3
Margaret H Magdesian, Madeleine Anthonisen, G Monserratt Lopez-Ayon, Xue Ying Chua, Matthew Rigby, Peter Grütter
Brain and spinal cord injury may lead to permanent disability and death because it is still not possible to regenerate neurons over long distances and accurately reconnect them with an appropriate target. Here a procedure is described to rapidly initiate, elongate, and precisely connect new functional neuronal circuits over long distances. The extension rates achieved reach over 1.2 mm/h, 30-60 times faster than the in vivo rates of the fastest growing axons from the peripheral nervous system (0.02 to 0.04 mm/h)(28) and 10 times faster than previously reported for the same neuronal type at an earlier stage of development(4)...
June 13, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28653797/neural-correlates-of-formal-thought-disorder-an-activation-likelihood-estimation-meta-analysis
#4
Tobias Wensing, Edna C Cieslik, Veronika I Müller, Felix Hoffstaedter, Simon B Eickhoff, Thomas Nickl-Jockschat
Formal thought disorder (FTD) refers to a psychopathological dimension characterized by disorganized and incoherent speech. Whether symptoms of FTD arise from aberrant processing in language-related regions or more general cognitive networks, however, remains debated. Here, we addressed this question by a quantitative meta-analysis of published functional neuroimaging studies on FTD. The revised Activation Likelihood Estimation (ALE) algorithm was used to test for convergent aberrant activation changes in 18 studies (30 experiments) investigating FTD, of which 17 studies comprised schizophrenia patients and one study healthy subjects administered to S-ketamine...
June 27, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28653793/intrinsic-connectivity-of-hippocampal-subfields-in-normal-elderly-and-mild-cognitive-impairment-patients
#5
Robin de Flores, Justine Mutlu, Alexandre Bejanin, Julie Gonneaud, Brigitte Landeau, Clémence Tomadesso, Florence Mézenge, Vincent de La Sayette, Francis Eustache, Gaël Chételat
Hippocampal connectivity has been widely described but connectivity specificities of hippocampal subfields and their changes in early AD are poorly known. The aim of this study was to highlight hippocampal subfield networks in healthy elderly (HE) and their changes in amnestic patients with mild cognitive impairment (aMCI). Thirty-six HE and 27 aMCI patients underwent resting-state functional MRI scans. Specific intrinsic connectivity of bilateral CA1, SUB (subiculum), and CA2/3/4/DG was identified in HE (using seeds derived from manually delineation on high-resolution scans) and compared between HE and aMCI...
June 27, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28652966/disruption-to-control-network-function-correlates-with-altered-dynamic-connectivity-in-the-wider-autism-spectrum
#6
N de Lacy, D Doherty, B H King, S Rachakonda, V D Calhoun
Autism is a common developmental condition with a wide, variable range of co-occurring neuropsychiatric symptoms. Contrasting with most extant studies, we explored whole-brain functional organization at multiple levels simultaneously in a large subject group reflecting autism's clinical diversity, and present the first network-based analysis of transient brain states, or dynamic connectivity, in autism. Disruption to inter-network and inter-system connectivity, rather than within individual networks, predominated...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28652747/disrupted-small-world-brain-functional-network-topology-in-male-patients-with-severe-obstructive-sleep-apnea-revealed-by-resting-state-fmri
#7
Li-Ting Chen, Xiao-Le Fan, Hai-Jun Li, Si Nie, Hong-Han Gong, Wei Zhang, Xian-Jun Zeng, Ping Long, De-Chang Peng
PURPOSE: Obstructive sleep apnea (OSA) is a common sleep-related breathing disorder that can damage cognitive function. However, the functional network organization remains poorly understood. The aim of this study was to investigate the topological properties of OSA patients using a graph theoretical analysis. PATIENTS AND METHODS: A total of 30 male patients with untreated severe OSA and 25 male education- and age-matched good sleepers (GSs) underwent functional magnetic resonance imaging (MRI) examinations...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28652219/the-fate-of-the-brain-cholinergic-neurons-in-neurodegenerative-diseases
#8
REVIEW
Giancarlo Pepeu, Maria Grazia Giovannini
The aims of this review are: 1) to describe which cholinergic neurons are affected in brain neurodegenerative diseases leading to dementia; 2) to discuss the possible causes of the degeneration of the cholinergic neurons, 3) to summarize the functional consequences of the cholinergic deficit. The brain cholinergic system is basically constituted by three populations of phenotypically similar neurons forming a series of basal forebrain nuclei, the midpontine nuclei and a large population of striatal interneurons...
June 23, 2017: Brain Research
https://www.readbyqxmd.com/read/28651098/an-interoceptive-model-of-bulimia-nervosa-a-neurobiological-systematic-review
#9
REVIEW
Megan Klabunde, Danielle Collado, Cara Bohon
The objective of our study was to examine the neurobiological support for an interoceptive sensory processing model of bulimia nervosa (BN). To do so, we conducted a systematic review of interoceptive sensory processing in BN, using the PRISMA guidelines. We searched PsychInfo, Pubmed, and Web of Knowledge databases to identify biological and behavioral studies that examine interoceptive detection in BN. After screening 390 articles for inclusion and conducting a quality assessment of articles that met inclusion criteria, we reviewed 41 articles...
June 19, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28650994/abnormal-global-functional-network-connectivity-and-its-relationship-to-medial-temporal-atrophy-in-patients-with-amnestic-mild-cognitive-impairment
#10
Can Sheng, Mingrui Xia, Haikuo Yu, Yue Huang, Yan Lu, Fang Liu, Yong He, Ying Han
BACKGROUND: Amnestic mild cognitive impairment (aMCI), which is recently considered as a high risk status for developing Alzheimer's disease (AD), manifests with gray matter atrophy and increased focal functional activity in the medial temporal lobe (MTL). However, the abnormalities of whole-brain functional network connectivity in aMCI and its relationship to medial temporal atrophy (MTA) remain unknown. METHODS: In this study, thirty-six aMCI patients and thirty-five healthy controls (HCs) were recruited...
2017: PloS One
https://www.readbyqxmd.com/read/28650974/resting-state-electrical-brain-activity-and-connectivity-in-fibromyalgia
#11
Sven Vanneste, Jan Ost, Tony Van Havenbergh, Dirk De Ridder
The exact mechanism underlying fibromyalgia is unknown, but increased facilitatory modulation and/or dysfunctional descending inhibitory pathway activity are posited as possible mechanisms contributing to sensitization of the central nervous system. The primary goal of this study is to identify a fibromyalgia neural circuit that can account for these abnormalities in central pain. The second goal is to gain a better understanding of the functional connectivity between the default and the executive attention network (salience network plus dorsal lateral prefrontal cortex) in fibromyalgia...
2017: PloS One
https://www.readbyqxmd.com/read/28649710/tracking-the-effect-of-emotional-distraction-in-working-memory-brain-networks-evidence-from-an-meg-study
#12
Javier García-Pacios, Pilar Garcés, David Del Río, Fernando Maestú
The active maintenance of information in visual working memory (WM) is known to rely on the sustained activity over functional networks including frontal, parietal, occipital, and temporal cortices. Previous studies have described interference-based disturbances in the functional coupling between prefrontal and posterior cortices, and that such disturbances can be restored for a successful WM performance after the presentation of the interfering stimulus. However, very few studies have applied functional connectivity measures to the analysis of the brain dynamics involved in overriding emotional distraction, and all of them have limited their analysis to the particular connections between the amygdala and prefrontal cortex...
June 25, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28649677/outcome-prediction-for-patient-with-high-grade-gliomas-from-brain-functional-and-structural-networks
#13
Luyan Liu, Han Zhang, Islem Rekik, Xiaobo Chen, Qian Wang, Dinggang Shen
High-grade glioma (HGG) is a lethal cancer, which is characterized by very poor prognosis. To help optimize treatment strategy, accurate preoperative prediction of HGG patient's outcome (i.e., survival time) is of great clinical value. However, there are huge individual variability of HGG, which produces a large variation in survival time, thus making prognostic prediction more challenging. Previous brain imaging-based outcome prediction studies relied only on the imaging intensity inside or slightly around the tumor, while ignoring any information that is located far away from the lesion (i...
October 2016: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/28649489/brain-functional-connectivity-is-associated-with-visceral-sensitivity-in-women-with-irritable-bowel-syndrome
#14
Adriane Icenhour, Suzanne T Witt, Sigrid Elsenbruch, Mats Lowén, Maria Engström, Kirsten Tillisch, Emeran A Mayer, Susanna Walter
Increased perception of visceral stimuli is a key feature of Irritable Bowel Syndrome (IBS). While altered resting-state functional connectivity (rsFC) has been also reported in IBS, the relationship between visceral hypersensitivity and aberrant rsFC is unknown. We therefore assessed rsFC within the salience, sensorimotor and default mode networks in patients with and without visceral hypersensitivity and in healthy controls (HCs). An exploratory resting-state functional magnetic resonance imaging study was performed in 41 women with IBS and 20 HCs...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28649394/functional-neuroimaging-and-chorea-a-systematic-review
#15
REVIEW
Debra J Ehrlich, Ruth H Walker
Chorea is a hyperkinetic movement disorder consisting of involuntary irregular, flowing movements of the trunk, neck or face. Although Huntington's disease is the most common cause of chorea in adults, chorea can also result from many other neurodegenerative, metabolic, and autoimmune conditions. While the pathophysiology of these different conditions is quite variable, recent advances in functional imaging have enabled the development of new methods for analysis of brain activity and neuronal dysfunction. In this paper we review the growing body of functional imaging data that has been performed in chorea syndromes and identify particular trends, which can be used to better understand the underlying network changes within the basal ganglia...
2017: Journal of Clinical Movement Disorders
https://www.readbyqxmd.com/read/28649314/hierarchical-cortical-transcriptome-disorganization-in-autism
#16
Michael V Lombardo, Eric Courchesne, Nathan E Lewis, Tiziano Pramparo
BACKGROUND: Autism spectrum disorders (ASD) are etiologically heterogeneous and complex. Functional genomics work has begun to identify a diverse array of dysregulated transcriptomic programs (e.g., synaptic, immune, cell cycle, DNA damage, WNT signaling, cortical patterning and differentiation) potentially involved in ASD brain abnormalities during childhood and adulthood. However, it remains unclear whether such diverse dysregulated pathways are independent of each other or instead reflect coordinated hierarchical systems-level pathology...
2017: Molecular Autism
https://www.readbyqxmd.com/read/28649229/cortical-and-subcortical-structural-plasticity-associated-with-the-glioma-volumes-in-patients-with-cerebral-gliomas-revealed-by-surface-based-morphometry
#17
Jinping Xu, Ahmed Elazab, Jinhua Liang, Fucang Jia, Huimin Zheng, Weimin Wang, Limin Wang, Qingmao Hu
Postlesional plasticity has been identified in patients with cerebral gliomas by inducing a large functional reshaping of brain networks. Although numerous non-invasive functional neuroimaging methods have extensively investigated the mechanisms of this functional redistribution in patients with cerebral gliomas, little effort has been made to investigate the structural plasticity of cortical and subcortical structures associated with the glioma volume. In this study, we aimed to investigate whether the contralateral cortical and subcortical structures are able to actively reorganize by themselves in these patients...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28648715/midbrain-stimulation-evoked-lumbar-spinal-activity-and-fictive-locomotion-in-the-adult-decerebrate-mouse
#18
Katinka Stecina
BACKGROUND: Genetic techniques rendering murine models a popular choice for neuroscience research has led to important insights on neural networks controlling locomotor function. Using genetically altered mouse models for in vivo, electrophysiological studies in the adult state could validate key principles of locomotor network organization that have been described in neonatal, in vitro preparations. NEW METHOD: The experimental model presented here describes a decerebrate, in vivo adult mouse preparation in which focal, electrical midbrain stimulation was combined with monitoring lumbar neural activity and motor output after pre-collicular decerebration and neuromuscular blockade...
June 22, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28648457/enriched-environment-promotes-remyelination-and-motor-function-recovery-through-modulation-of-hdac1-2-in-mice
#19
Jian Zheng, Weijun Ding, Baoming Li, Youjun Yang
Brain structure and functions are significantly affected by enriched environment (EE). Rodent and rhesus monkeys raised in EE will increase myelination in development, and these increase correlate with improved cognitive functions on learning and memory. However, whether and how EE influences remyelination in the adult remained undefined. Here, we used a cuprizone-induced demyelination mouse model demonstrate that EE significantly enhances remyelination. This EE-regulated remyelination is associated with improved motor skills...
June 22, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28648285/simultaneous-learning-of-two-languages-from-birth-positively-impacts-intrinsic-functional-connectivity-and-cognitive-control
#20
Shanna Kousaie, Xiaoqian J Chai, Kaija M Sander, Denise Klein
This study explores the effect of individual differences in the age of acquisition of a second language using resting-state functional magnetic resonance imaging (rs-fMRI) to examine functional connectivity and its relation with cognitive control within bilinguals. We compared simultaneous bilinguals, who learned two languages from birth, to sequential bilinguals, who learned a second language following mastery of their first language. Results show an effect of language experience on the strength of anticorrelation between the default mode network and the task-positive attention network and on cognitive control, with simultaneous bilinguals demonstrating stronger anticorrelations between the two networks, as well as superior cognitive control compared to sequential bilinguals...
June 22, 2017: Brain and Cognition
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