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https://www.readbyqxmd.com/read/29667572/neurobiological-findings-associated-with-high-cognitive-performance-in-older-adults-a-systematic-review
#1
Wyllians Vendramini Borelli, Lucas Porcello Schilling, Graciane Radaelli, Luciana Borges Ferreira, Leonardo Pisani, Mirna Wetters Portuguez, Jaderson Costa da Costa
ABSTRACTObjectives:to perform a comprehensive literature review of studies on older adults with exceptional cognitive performance. DESIGN: We performed a systematic review using two major databases (MEDLINE and Web of Science) from January 2002 to November 2017. RESULTS: Quantitative analysis included nine of 4,457 studies and revealed that high-performing older adults have global preservation of the cortex, especially the anterior cingulate region, and hippocampal volumes larger than normal agers...
April 18, 2018: International Psychogeriatrics
https://www.readbyqxmd.com/read/29667260/tai-chi-improves-brain-metabolism-and-muscle-energetics-in-older-adults
#2
Min Zhou, Huijun Liao, Lasya P Sreepada, Joshua R Ladner, James A Balschi, Alexander P Lin
BACKGROUND AND PURPOSE: Tai Chi is a mind-body exercise that has been shown to improve both mental and physical health. As a result, recent literature suggests the use of Tai Chi to treat both physical and psychological disorders. However, the underlying physiological changes have not been characterized. The aim of this pilot study is to assess the changes in brain metabolites and muscle energetics after Tai Chi training in an aging population using a combined brain-muscle magnetic resonance spectroscopy (MRS) examination...
April 17, 2018: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/29667212/breathlessness-amplifies-amygdala-responses-during-affective-processing
#3
M Cornelia Stoeckel, Roland W Esser, Matthias Gamer, Andreas von Leupoldt
Breathlessness is an aversive symptom in many prevalent somatic and psychiatric diseases and is usually experienced as highly threatening. It is strongly associated with negative affect, but the underlying neural processes remain poorly understood. Therefore, using fMRI, the present study examined the effects of breathlessness on the neural processing of affective visual stimuli within candidate brain areas including the amygdala, insula, and anterior cingulate cortex (ACC). During scanning, 42 healthy volunteers, mean (SD) age: 29...
April 17, 2018: Psychophysiology
https://www.readbyqxmd.com/read/29667043/abnormalities-in-thalamo-cortical-connections-in-patients-with-first-episode-schizophrenia-a-two-tensor-tractography-study
#4
Hesham M Hamoda, A T Makhlouf, J Fitzsimmons, Y Rathi, N Makris, R I Mesholam-Gately, J D Wojcik, J Goldstein, R W McCarley, L J Seidman, M Kubicki, M E Shenton
The "cognitive dysmetria" hypothesis suggests that impairments in cognition and behavior in patients with schizophrenia can be explained by disruptions in the cortico-cerebellar-thalamic-cortical circuit. In this study we examine thalamo-cortical connections in patients with first-episode schizophrenia (FESZ). White matter pathways are investigated that connect the thalamus with three frontal cortex regions including the anterior cingulate cortex (ACC), ventrolateral prefrontal cortex (VLPFC), and lateral oribitofrontal cortex (LOFC)...
April 17, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29665578/brain-morphology-cognition-and-%C3%AE-amyloid-in-older-adults-with-superior-memory-performance
#5
Theresa M Harrison, Anne Maass, Suzanne L Baker, William J Jagust
The mechanisms underlying superior cognitive performance in some older adults are poorly understood. We used a multimodal approach to characterize imaging and cognitive features of 26 successful agers (SA; defined by superior episodic memory ability) and 103 typical older adults. Cortical thickness was greater in multiple regions in SA including right anterior cingulate and prefrontal cortex and was related to baseline memory performance. Similarly, hippocampal volume was greater in SA and associated with baseline memory...
March 27, 2018: Neurobiology of Aging
https://www.readbyqxmd.com/read/29665490/smaller-hippocampal-volume-in-current-but-not-in-past-depression-in-comparison-to-healthy-controls-minor-evidence-from-an-older-adults-sample
#6
Ismaïl Bensassi, Jorge Lopez-Castroman, Jerome J Maller, Chantal Meslin, Marilyn Wyart, Karen Ritchie, Philippe Courtet, Sylvaine Artero, Raffaella Calati
BACKGROUND: Structural neuroimaging studies revealed a consistent pattern of volumetric reductions in both hippocampus (HC) and anterior cingulate cortex (ACC) of individuals with major depressive episode(s) (MDE). This study investigated HC and ACC volume differences in currently depressed individuals (n = 150), individuals with a past lifetime MDE history (n = 79) and healthy controls (n = 287). METHODS: Non-demented individuals were recruited from a cohort of community-dwelling older adults (ESPRIT study)...
April 9, 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29665419/widespread-associations-between-trait-conscientiousness-and-thickness-of-brain-cortical-regions
#7
Gary J Lewis, David Alexander Dickie, Simon R Cox, Sherif Karama, Alan C Evans, John M Starr, Mark E Bastin, Joanna M Wardlaw, Ian J Deary
The neural correlates of human personality have been of longstanding interest; however, most studies in the field have relied on modest sample sizes and few replicable results have been reported to date. We investigated relationships between personality and brain gray matter in a sample of generally healthy, older (mean age 73 years) adults from Scotland drawn from the Lothian Birth Cohort 1936. Participants (N = 578) completed a brain MRI scan and self-reported Big Five personality trait measures. Conscientiousness trait scores were positively related to brain cortical thickness in a range of regions, including bilateral parahippocampal gyrus, bilateral fusiform gyrus, left cingulate gyrus, right medial orbitofrontal cortex, and left dorsomedial prefrontal cortex...
April 14, 2018: NeuroImage
https://www.readbyqxmd.com/read/29665283/accelerated-executive-functions-decline-and-gray-matter-structural-changes-in-middle-aged-type-1-diabetes-patients-with-proliferative-retinopathy
#8
Eelco van Duinkerken, Martijn D Steenwijk, Martin Klein, Frederik Barkhof, Daniel C Mograbi, Michaela Diamant, Frank J Snoek, Richard G Ijzerman
BACKGROUND: The aim of this study was to determine trajectories of cognitive and cortical changes over time in middle-aged patients with type 1 diabetes and proliferative retinopathy. METHODS: Twenty-five patients and 25 controls underwent neuropsychological assessment and neuroimaging twice in 3.56 ± 0.65 and 3.94 ± 0.91 years respectively (P = 0.098). Cognitive assessment included the domains of general cognitive ability, memory, information processing speed, executive functions, attention, motor and psychomotor speed...
April 17, 2018: Journal of Diabetes
https://www.readbyqxmd.com/read/29664400/rat-anterior-cingulate-cortex-recalls-features-of-remote-reward-locations-after-disfavoured-reinforcements
#9
Ali Mashhoori, Saeedeh Hashemniayetorshizi, Bruce L McNaughton, David Euston, Aaron J Gruber
The anterior cingulate cortex (ACC) encodes information supporting mnemonic and cognitive processes. We show here that a rat's position can be decoded with high spatiotemporal resolution from ACC activity. ACC neurons encoded the current state of the animal and task, except for brief excursions that sometimes occurred at target feeders. During excursions, the decoded position became more similar to a remote target feeder than the rat's physical position. Excursions recruited activation of neurons encoding choice and reward, and the likelihood of excursions at a feeder was inversely correlated with feeder preference...
April 17, 2018: ELife
https://www.readbyqxmd.com/read/29663134/profound-seasonal-changes-in-brain-size-and-architecture-in-the-common-shrew
#10
Javier Lázaro, Moritz Hertel, Chet C Sherwood, Marion Muturi, Dina K N Dechmann
The seasonal changes in brain size of some shrews represent the most drastic reversible transformation in the mammalian central nervous system known to date. Brain mass decreases 10-26% from summer to winter and regrows 9-16% in spring, but the underlying structural changes at the cellular level are not yet understood. Here, we describe the volumetric differences in brain structures between seasons and sexes of the common shrew (Sorex araneus) in detail, confirming that changes in different brain regions vary in the magnitude of change...
April 16, 2018: Brain Structure & Function
https://www.readbyqxmd.com/read/29662447/neural-mechanisms-underlying-time-perception-and-reward-anticipation
#11
Nihal Apaydın, Sertaç Üstün, Emre H Kale, İpek Çelikağ, Halise D Özgüven, Bora Baskak, Metehan Çiçek
Findings suggest that the physiological mechanisms involved in the reward anticipation and time perception partially overlap. But the systematic investigation of a potential interaction between time and reward systems using neuroimaging is lacking. Eighteen healthy volunteers (all right-handed) participated in an event-related functional magnetic resonance imaging (fMRI) experiment that employs a visual paradigm that consists monetary reward to assess whether the functional neural representations of time perception and reward prospection are shared or distinct...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29661904/increased-cerebral-functional-connectivity-in-als-a-resting-state-magnetoencephalography-study
#12
Malcolm Proudfoot, Giles L Colclough, Andrew Quinn, Joanne Wuu, Kevin Talbot, Michael Benatar, Anna C Nobre, Mark W Woolrich, Martin R Turner
OBJECTIVE: We sought to assess cortical function in amyotrophic lateral sclerosis (ALS) using noninvasive neural signal recording. METHODS: Resting-state magnetoencephalography was used to measure power fluctuations in neuronal oscillations from distributed cortical parcels in 24 patients with ALS and 24 healthy controls. A further 9 patients with primary lateral sclerosis and a group of 15 asymptomatic carriers of genetic mutations associated with ALS were also studied...
April 17, 2018: Neurology
https://www.readbyqxmd.com/read/29660812/tremor-severity-in-parkinson-s-disease-and-cortical-changes-of-areas-controlling-movement-sequencing-a-preliminary-study
#13
Julián Benito-León, J Ignacio Serrano, Elan D Louis, Ales Holobar, Juan P Romero, P Povalej-Bržan, Félix Bermejo-Pareja, M Dolores Del Castillo, Ignacio J Posada, Eduardo Rocon
There remains much to learn about the changes in cortical anatomy that are associated with tremor severity in Parkinson's disease (PD). For this reason, we used a combination of structural neuroimaging to measure cortical thickness and neurophysiological studies to analyze whether PD tremor was associated with cortex integrity. Magnetic resonance imaging and neurophysiological assessment were performed in 13 nondemented PD patients (9 women, 69.2%) with a clearly tremor-dominant phenotype. Cortical reconstruction and volumetric segmentation were performed with the Freesurfer image analysis software...
April 16, 2018: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29660639/elevated-tumor-necrosis-factor-alpha-receptor-subtype-1-and-the-association-with-abnormal-brain-function-in-treatment-resistant-depression
#14
Mao-Hsuan Huang, Mu-Hong Chen, Pei-Chi Tu, Ya Mei Bai, Tung-Ping Su, Bang-Hung Yang, Ren-Shyan Liu, Cheng-Ta Li
BACKGROUND: Major depressive disorder (MDD) patients have shown elevated plasma levels of pro-inflammatory biomarkers compared to healthy controls. We hypothesized increased serum tumor necrosis factor-alpha receptor subtype 1 (TNF-α R1) is more associated with impaired brain function in patients with treatment-resistant depression (TRD) than those without TRD. METHODS: 34 MDD patients and 34 healthy subjects were recruited and we separated MDD patients to TRD group (n = 20) and non-TRD (n = 14) group...
April 6, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29660636/regional-homogeneity-and-functional-connectivity-patterns-in-major-depressive-disorder-cognitive-vulnerability-to-depression-and-healthy-subjects
#15
Hui Sun, Lizhu Luo, Xinru Yuan, Lu Zhang, Yini He, Shuqiao Yao, Jiaojian Wang, Jing Xiao
BACKGROUND: Cognitive vulnerability to depression (CVD) is a high risk for depressive disorder. Recent studies focus on individuals with CVD to determine the neural basis of major depressive disorder (MDD) neuropathology. However, whether CVD showed specific or similar brain functional activity and connectivity patterns, compared to MDD, remain largely unknown. METHODS: Here, using resting-state functional magnetic resonance imaging in subjects with CVD, healthy controls (HC) and MDD, regional homogeneity (ReHo) and resting-state functional connectivity (R-FC) analyses were conducted to assess local synchronization and changes in functional connectivity patterns...
April 7, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29660102/psychopathic-traits-influence-amygdala-anterior-cingulate-cortex-connectivity-during-facial-emotion-processing
#16
Michael P Ewbank, Luca Passamonti, Cindy C Hagan, Ian M Goodyer, Andrew J Calder, Graeme Fairchild
There is accumulating evidence that youths with antisocial behavior or psychopathic traits show deficits in facial emotion recognition, but little is known about the neural mechanisms underlying these impairments. A number of neuroimaging studies have investigated brain activity during facial emotion processing in youths with Conduct Disorder (CD) and adults with psychopathy, but few of these studies tested for group differences in effective connectivity - i.e., changes in connectivity during emotion processing...
April 12, 2018: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/29660081/data-driven-analysis-of-functional-connectivity-reveals-a-potential-auditory-verbal-hallucination-network
#17
Dustin Scheinost, Fuyuze Tokoglu, Michelle Hampson, Ralph Hoffman, R Todd Constable
Schizophrenia is a severe global health problem, with over half of such patients experiencing auditory verbal hallucinations (AVHs). A better understanding of the neural correlates differentiating patients experiencing AVHs from patients not experiencing AVHs and healthy controls may identify targets that lead to better treatment strategies for AVHs. Employing 2 data-driven, voxel-based measure of functional connectivity, we studied 46 patients with schizophrenia or schizoaffective disorder (28 experiencing AVHs and 18 not experiencing AVHs)...
April 5, 2018: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29657900/occipital-and-cingulate-hypometabolism-are-significantly-under-reported-on-18-fluorodeoxyglucose-positron-emission-tomography-scans-of-patients-with-lewy-body-dementia
#18
Moath Hamed, Frank Schraml, Jeffrey Wilson, James Galvin, Marwan N Sabbagh
Objective: To determine whether occipital and cingulate hypometabolism is being under-reported or missed on 18-fluorodeoxyglucose positron emission tomography (FDG-PET) CT scans in patients with Dementia with Lewy Bodies (DLB). Background: Recent studies have reported higher sensitivity and specificity for occipital and cingulate hypometabolism on FDG-PET of DLB patients. Methods: This retrospective chart review looked at regions of interest (ROI's) in FDG-PET CT scan reports in 35 consecutive patients with a clinical diagnosis of probable, possible, or definite DLB as defined by the latest DLB Consortium Report...
2018: Journal of Alzheimer's Disease and Parkinsonism
https://www.readbyqxmd.com/read/29656270/reduced-integrity-of-the-uncinate-fasciculus-and-cingulum-in-depression-a-stem-by-stem-analysis
#19
Kartik D Bhatia, Luke A Henderson, Eugene Hsu, Mark Yim
INTRODUCTION: The subgenual cingulate gyrus (Brodmann's Area 25: BA25) is hypermetabolic in depression and has been targeted successfully with deep brain stimulation. Two of the white matter tracts that play a role in treatment response are the uncinate fasciculus (UF) and the cingulum bundle. The UF has three prefrontal stems, the most medial of which extends from BA25 (which deals with mood regulation) and the most lateral of which extends from the dorso-lateral prefrontal cortex (concerned with executive function)...
April 7, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29656266/cortical-and-subcortical-changes-in-patients-with-premenstrual-syndrome
#20
Peng Liu, Ying Wei, Yingying Fan, Hai Liao, Geliang Wang, Ru Li, Gaoxiong Duan, Demao Deng, Wei Qin
BACKGROUND: Premenstrual syndrome (PMS) is characterized by a series of emotional, physical and behavioral symptoms. Although PMS is related to dysfunctions of the central nervous system, the neuropathological mechanism of PMS still has not been clearly established. The aim of this study is to evaluate potential differences in both cortical thickness and subcortical volumes in PMS patients compared to healthy controls (HCs). METHODS: Twenty PMS patients and twenty HCs underwent a structural magnetic resonance imaging scan and clinical assessment...
April 7, 2018: Journal of Affective Disorders
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