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Aging brain fmri cognition

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https://www.readbyqxmd.com/read/29339315/insulin-sensitivity-predicts-brain-network-connectivity-following-a-meal
#1
John P Ryan, Helmet T Karim, Howard J Aizenstein, Nicole L Helbling, Frederico G S Toledo
There is converging evidence that insulin plays a role in food-reward signaling in the brain and has effects on enhancing cognition. Little is known about how these effects are altered in individuals with insulin resistance. The present study was designed to identify the relationships between insulin resistance and functional brain connectivity following a meal. Eighteen healthy adults (7 male, 11 female, age: 41-57 years-old) completed a frequently-sampled intravenous glucose tolerance test to quantify insulin resistance...
January 12, 2018: NeuroImage
https://www.readbyqxmd.com/read/29334837/more-expertise-for-a-better-perspective-task-and-strategy-driven-adaptive-neurofunctional-reorganization-for-word-production-in-high-performing-older-adults
#2
Ikram Methqal, Yannick Marsolais, Maximiliano A Wilson, Oury Monchi, Yves Joanette
The suggestion that neurofunctional reorganization may contribute to preserved language abilities is still emerging in aging studies. Some of these abilities, such as verbal fluency (VF), are not unitary but instead rely on different strategic processes that are differentially changed with age. Younger (n = 13) and older adults (n = 13) carried out an overt self-paced semantic and orthographic VF tasks within mixed fMRI design. Our results suggest that patterns of brain activation sustaining equivalent performances could be underpinned by different strategies facing brain changes during healthy aging...
January 16, 2018: Neuropsychology, Development, and Cognition. Section B, Aging, Neuropsychology and Cognition
https://www.readbyqxmd.com/read/29331931/resting-state-fmri-signals-in-offspring-of-parents-with-bipolar-disorder-at-the-high-risk-and-ultra-high-risk-stages-and-their-relations-with-cognitive-function
#3
Kangguang Lin, Robin Shao, Rui Lu, Kun Chen, Weicong Lu, Ting Li, Jiehua Kong, Kwok-Fai So, Guiyun Xu
BACKGROUND: Bipolar disorder (BD) has been associated with dysfunctional resting-state brain functioning. However, it is still not known whether the aberrant functioning occurs and predict cognitive functioning before illness onset. AIMS: We examined the resting-state regional and network dysfunctioning, and their correlates with neurocognitive performance, in the high-risk (HR) and ultra-high-risk (UHR) stages of bipolar disorder. METHODS: Using amplitude of low-frequency fluctuations (ALFF), region homogeneity (ReHo) and hypothesis-driven region-of-interest (ROI)-based connectivity, we examined resting-state fMRI data of 8- to 25-year-old healthy offspring (HR, n = 28) and offspring with subthreshold syndromes (UHR, n = 22) of a BD parent, and age-matched healthy controls without any personal or family psychopathology (HC, n = 46)...
January 8, 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29330483/neural-correlates-of-sexual-orientation-in-heterosexual-bisexual-and-homosexual-women
#4
Adam Safron, Victoria Klimaj, David Sylva, A M Rosenthal, Meng Li, Martin Walter, J Michael Bailey
We used fMRI to investigate neural correlates of responses to erotic pictures and videos in heterosexual (N = 26), bisexual (N = 26), and homosexual (N = 24) women, ages 25-50. We focused on the ventral striatum, an area of the brain associated with desire, extending previous findings from the sexual psychophysiology literature in which homosexual women had greater category specificity (relative to heterosexual and bisexual women) in their responses to male and female erotic stimuli. We found that homosexual women's subjective and neural responses reflected greater bias towards female stimuli, compared with bisexual and heterosexual women, whose responses did not significantly differ...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29322586/functional-connectivity-predicts-gender-evidence-for-gender-differences-in-resting-brain-connectivity
#5
Chao Zhang, Chase C Dougherty, Stefi A Baum, Tonya White, Andrew M Michael
Prevalence of certain forms of psychopathology, such as autism and depression, differs between genders and understanding gender differences of the neurotypical brain may provide insights into risk and protective factors. In recent research, resting state functional magnetic resonance imaging (rfMRI) is widely used to map the inherent functional networks of the brain. Although previous studies have reported gender differences in rfMRI, the robustness of gender differences is not well characterized. In this study, we use a large data set to test whether rfMRI functional connectivity (FC) can be used to predict gender and identify FC features that are most predictive of gender...
January 10, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29321971/processing-and-regulation-of-negative-emotions-in-anorexia-nervosa-an-fmri-study
#6
Maria Seidel, Joseph A King, Franziska Ritschel, Ilka Boehm, Daniel Geisler, Fabio Bernardoni, Matthias Beck, Sophie Pauligk, Ronald Biemann, Alexander Strobel, Thomas Goschke, Henrik Walter, Veit Roessner, Stefan Ehrlich
Theoretical models and recent advances in the treatment of anorexia nervosa (AN) have increasingly focused on the role of alterations in the processing and regulation of emotions. To date, however, our understanding of these changes is still limited and reports of emotional dysregulation in AN have been based largely on self-report data, and there is a relative lack of objective experimental evidence or neurobiological data. The current functional magnetic resonance imaging (fMRI) study investigated the hemodynamic correlates of passive viewing and voluntary downregulation of negative emotions by means of the reappraisal strategy detachment in AN patients...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29315984/default-mode-network-modifications-in-fabry-disease-a-resting-state-fmri-study-with-structural-correlations
#7
Sirio Cocozza, Giuseppe Pontillo, Mario Quarantelli, Francesco Saccà, Eleonora Riccio, Teresa Costabile, Gaia Olivo, Vincenzo Brescia Morra, Antonio Pisani, Arturo Brunetti, Enrico Tedeschi
Aim of the study was to evaluate the presence of Default Mode Network (DMN) modifications in Fabry Disease (FD), and their possible correlations with structural alterations and neuropsychological scores. Thirty-two FD patients with a genetically confirmed diagnosis of classical FD (12 males, mean age 43.3 ± 12.2) were enrolled, along with 35 healthy controls (HC) of comparable age and sex (14 males, mean age 42.1 ± 14.5). Resting-State fMRI data were analyzed using a seed-based approach, with six different seeds sampling the main hubs of the DMN...
January 9, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29310911/attenuated-resting-state-functional-connectivity-in-patients-with-childhood-and-adult-onset-schizophrenia
#8
Rebecca E Watsky, Stephen J Gotts, Rebecca A Berman, Harrison M McAdams, Xueping Zhou, Dede Greenstein, Francois M Lalonde, Peter Gochman, Liv S Clasen, Lorie Shora, Anna E Ordóñez, Nitin Gogtay, Alex Martin, Deanna M Barch, Judith L Rapoport, Siyuan Liu
BACKGROUND: Childhood-onset schizophrenia (COS) is a rare, severe form of the adult-onset disorder (AOS). Our previous resting-state fMRI study identified attenuated functional connectivity in COS compared with controls. Here, we ask whether COS and AOS patients and their siblings exhibit similar abnormalities of functional connectivity. METHODS: A whole-brain, data-driven approach was used to assess resting-state functional connectivity differences in COS (patients/siblings/controls, n: 26/28/33) and AOS (n: 19/28/30)...
January 6, 2018: Schizophrenia Research
https://www.readbyqxmd.com/read/29306697/current-sleep-disturbance-in-older-people-with-a-lifetime-history-of-depression-is-associated-with-increased-connectivity-in-the-default-mode-network
#9
Andrew C McKinnon, Ian B Hickie, Jan Scott, Shantel L Duffy, Louisa Norrie, Zoe Terpening, Ron R Grunstein, Jim Lagopoulos, Jennifer Batchelor, Simon J G Lewis, James M Shine, Sharon L Naismith
BACKGROUND: The present study investigated Default Mode Network (DMN) functional connectivity in subjects with a lifetime history of major depression, comparing those with and without current sleep disturbance. Controls were included to assess DMN abnormalities specific to depression. METHODS: A total of 93 adults aged 50 years and over were recruited from the Healthy Brain Ageing Clinic at the Brain and Mind Centre, Sydney, Australia. The sample comprised two groups, including 22 controls and 71 participants with a lifetime history of DSM-IV major depression (with depressive episode current or remitted)...
December 29, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29275589/-characteristics-of-cognitive-impairment-and-the-resting-state-functional-mri-in-patients-with-leukoaraiosis
#10
Q Li, L Q Zhao, F Y Hu
Objective: To investigate the features of cognitive impairment and potential physiopathologic mechanism using neuropsychological assessment and resting state functional magnetic resonance imaging (rs-fMRI) in patients with leukoaraiosis (LA). Methods: A total of 13 patients with LA (LA group) and 13 healthy controls (NC group) from Shanxi Provincial People's Hospital between January and June 2016 were recruited. The two groups were matched for age, sex, education, and vascular risk factors. All the subjects underwent neuropsychological assessment and the scan of rs-fMRI...
December 5, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29274503/human-aging-reduces-the-neurobehavioral-influence-of-motivation-on-episodic-memory
#11
Maiya R Geddes, Aaron T Mattfeld, Carlo de Los Angeles, Anisha Keshavan, John D E Gabrieli
The neural circuitry mediating the influence of motivation on long-term declarative or episodic memory formation is delineated in young adults, but its status is unknown in healthy aging. We examined the effect of reward and punishment anticipation on intentional declarative memory formation for words using an event-related functional magnetic resonance imaging (fMRI) monetary incentive encoding task in twenty-one younger and nineteen older adults. At 24-hour memory retrieval testing, younger adults were significantly more likely to remember words associated with motivational cues than neutral cues...
December 20, 2017: NeuroImage
https://www.readbyqxmd.com/read/29273689/multiple-pathways-of-reserve-simultaneously-present-in-cognitively-normal-older-adults
#12
Hwamee Oh, Qolamreza R Razlighi, Yaakov Stern
OBJECTIVE: To examine neural correlates of intellectual activity underlying multiple pathways imparting reserve by testing that higher intellectual activity is associated with lower brain amyloid pathology, greater gray matter (GM) volume, and differential task-evoked brain activation levels as a function of amyloid positivity status among clinically intact older adults. METHODS: Eighty-two cognitively normal older adults and 46 healthy young participants underwent fMRI during task switching...
December 22, 2017: Neurology
https://www.readbyqxmd.com/read/29258890/serotonergic-and-cholinergic-modulation-of-functional-brain-connectivity-a-comparison-between-young-and-older-adults
#13
Bernadet L Klaassens, Joop M A van Gerven, Erica S Klaassen, Jeroen van der Grond, Serge A R B Rombouts
Aging is accompanied by changes in neurotransmission. To advance our understanding of how aging modifies specific neural circuitries, we examined serotonergic and cholinergic stimulation with resting state functional magnetic resonance imaging (RS-fMRI) in young and older adults. The instant response to the selective serotonin reuptake inhibitor citalopram (30 mg) and the acetylcholinesterase inhibitor galantamine (8 mg) was measured in 12 young and 17 older volunteers during a randomized, double blind, placebo-controlled, crossover study...
December 16, 2017: NeuroImage
https://www.readbyqxmd.com/read/29244054/a-systematic-review-for-functional-neuroimaging-studies-of-cognitive-reserve-across-the-cognitive-aging-spectrum
#14
Mia Anthony, Feng Lin
Objective: Cognitive reserve has been proposed to explain the discrepancy between clinical symptoms and the effects of aging or Alzheimer's pathology. Functional magnetic resonance imaging (fMRI) may help elucidate how neural reserve and compensation delay cognitive decline and identify brain regions associated with cognitive reserve. This systematic review evaluated neural correlates of cognitive reserve via fMRI (resting-state and task-related) studies across the cognitive aging spectrum (i...
December 13, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29220349/neural-correlates-of-motor-cognitive-dual-tasking-in-young-and-old-adults
#15
Selma Papegaaij, Tibor Hortobágyi, Ben Godde, Wim A Kaan, Peter Erhard, Claudia Voelcker-Rehage
When two tasks are performed simultaneously, performance often declines in one or both tasks. These so-called dual-task costs are more pronounced in old than in young adults. One proposed neurological mechanism of the dual-task costs is that old compared with young adults tend to execute single-tasks with higher brain activation. In the brain regions that are needed for both tasks, the reduced residual capacity may interfere with performance of the dual-task. This competition for shared brain regions has been called structural interference...
2017: PloS One
https://www.readbyqxmd.com/read/29218753/neuronal-responses-to-the-scratching-and-caressing-of-one-s-own-skin-in-patients-with-skin-picking-disorder
#16
Anne Schienle, Sonja Übel, Albert Wabnegger
Skin-picking disorder (SPD) is a common mental disorder. The predominant symptom involves the repeated scratching and picking of one's own skin. This behavior causes severe tissue damage (sores, scars, and infections), often leading to disfigurement. Besides physical injury, SPD is associated with clinically significant distress and impairment in important areas of functioning. The neurobiological mechanisms of SPD are still poorly understood. In this study, 30 SPD patients and 31 control participants (35 women, 26 men) with a mean age of 34 years were instructed to either scratch or gently stroke a small skin area on their arms during functional magnetic resonance imaging...
December 7, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29214483/psychotherapyplus-augmentation-of-cognitive-behavioral-therapy-cbt-with-prefrontal-transcranial-direct-current-stimulation-tdcs-in-major-depressive-disorder-study-design-and-methodology-of-a-multicenter-double-blind-randomized-placebo-controlled-trial
#17
Malek Bajbouj, Sabine Aust, Jan Spies, Ana-Lucia Herrera-Melendez, Sarah V Mayer, Maike Peters, Christian Plewnia, Andreas J Fallgatter, Lukas Frase, Claus Normann, Nora Behler, Linda Wulf, Eva-Lotta Brakemeier, Frank Padberg
Major Depressive Disorder (MDD) is one of the most prevalent psychiatric disorders worldwide. About 20-30% of patients do not respond to the standard psychopharmacological and/or psychotherapeutic interventions. Mounting evidence from neuroimaging studies in MDD patients reveal altered activation patterns in lateral prefrontal brain areas. Successful cognitive behavioral therapy (CBT) is associated with a recovery of these neural alterations. Moreover, it has been demonstrated that transcranial direct current stimulation (tDCS) is capable of influencing prefrontal cortex activity and cognitive functions such as working memory and emotion regulation...
December 6, 2017: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/29209202/neural-basis-of-enhanced-executive-function-in-older-video-game-players-an-fmri-study
#18
Ping Wang, Xing-Ting Zhu, Zhigang Qi, Silin Huang, Hui-Jie Li
Video games have been found to have positive influences on executive function in older adults; however, the underlying neural basis of the benefits from video games has been unclear. Adopting a task-based functional magnetic resonance imaging (fMRI) study targeted at the flanker task, the present study aims to explore the neural basis of the improved executive function in older adults with video game experiences. Twenty video game players (VGPs) and twenty non-video game players (NVGPs) of 60 years of age or older participated in the present study, and there are no significant differences in age (t = 0...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29209199/decreased-complexity-in-alzheimer-s-disease-resting-state-fmri-evidence-of-brain-entropy-mapping
#19
Bin Wang, Yan Niu, Liwen Miao, Rui Cao, Pengfei Yan, Hao Guo, Dandan Li, Yuxiang Guo, Tianyi Yan, Jinglong Wu, Jie Xiang, Hui Zhang
Alzheimer's disease (AD) is a frequently observed, irreversible brain function disorder among elderly individuals. Resting-state functional magnetic resonance imaging (rs-fMRI) has been introduced as an alternative approach to assessing brain functional abnormalities in AD patients. However, alterations in the brain rs-fMRI signal complexities in mild cognitive impairment (MCI) and AD patients remain unclear. Here, we described the novel application of permutation entropy (PE) to investigate the abnormal complexity of rs-fMRI signals in MCI and AD patients...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29209197/asymmetry-of-hemispheric-network-topology-reveals-dissociable-processes-between-functional-and-structural-brain-connectome-in-community-living-elders
#20
Yu Sun, Junhua Li, John Suckling, Lei Feng
Human brain is structurally and functionally asymmetrical and the asymmetries of brain phenotypes have been shown to change in normal aging. Recent advances in graph theoretical analysis have showed topological lateralization between hemispheric networks in the human brain throughout the lifespan. Nevertheless, apparent discrepancies of hemispheric asymmetry were reported between the structural and functional brain networks, indicating the potentially complex asymmetry patterns between structural and functional networks in aging population...
2017: Frontiers in Aging Neuroscience
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