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https://www.readbyqxmd.com/read/28104431/abnormal-regional-spontaneous-neuronal-activity-associated-with-symptom-severity-in-treatment-naive-patients-with-obsessive-compulsive-disorder-revealed-by-resting-state-functional-mri
#1
Linlin Qiu, Xiangshuai Fu, Shuai Wang, Qunfeng Tang, Xingui Chen, Lin Cheng, Fuquan Zhang, Zhenhe Zhou, Lin Tian
A large number of neuroimaging studies have revealed the dysfunction of brain activities in obsessive-compulsive disorder (OCD) during various tasks. However, regional spontaneous activity abnormalities in OCD are gradually being revealed. In this current study, we aimed to investigate cerebral regions with abnormal spontaneous activity using resting-state functional magnetic resonance imaging (fMRI) and further explored the relationship between the spontaneous neuronal activity and symptom severity of patients with OCD...
January 16, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28098938/towards-prognostic-biomarkers-from-bold-fluctuations-to-differentiate-a-first-epileptic-seizure-from-new-onset-epilepsy
#2
Lalit Gupta, Rick Janssens, Mariëlle C G Vlooswijk, Rob P W Rouhl, Anton de Louw, Albert P Aldenkamp, Shrutin Ulman, René M H Besseling, Paul A M Hofman, Vivianne H van Kranen-Mastenbroek, Danny M Hilkman, Jacobus F A Jansen, Walter H Backes
OBJECTIVE: The diagnosis of epilepsy cannot be reliably made prior to a patient's second seizure in most cases. Therefore, adequate diagnostic tools are needed to differentiate subjects with a first seizure from those with a seizure preceding the onset of epilepsy. The objective was to explore spontaneous blood oxygen level-dependent (BOLD) fluctuations in subjects with a first-ever seizure and patients with new-onset epilepsy (NOE), and to find characteristic biomarkers for seizure recurrence after the first seizure...
January 18, 2017: Epilepsia
https://www.readbyqxmd.com/read/28094810/aberrant-development-of-intrinsic-brain-activity-in-a-rat-model-of-caregiver-maltreatment-of-offspring
#3
C-G Yan, M Rincón-Cortés, C Raineki, E Sarro, S Colcombe, D N Guilfoyle, Z Yang, S Gerum, B B Biswal, M P Milham, R M Sullivan, F X Castellanos
Caregiver maltreatment induces vulnerability to later-life psychopathology. Clinical and preclinical evidence suggest changes in prefrontal and limbic circuitry underlie this susceptibility. We examined this question using a rat model of maternal maltreatment and methods translated from humans, resting-state functional magnetic resonance imaging (R-fMRI). Rat pups were reared by mothers provided with insufficient or abundant bedding for nest building from postnatal (PN) days 8 to 12 and underwent behavioral assessments of affect-related behaviors (forced swim, sucrose preference and social interaction) in adolescence (PN45) and early adulthood (PN60)...
January 17, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28077184/abnormalities-in-the-effective-connectivity-of-visuothalamic-circuitry-in-schizophrenia
#4
S J Iwabuchi, L Palaniyappan
BACKGROUND: Sensory-processing deficits appear crucial to the clinical expression of symptoms of schizophrenia. The visual cortex displays both dysconnectivity and aberrant spontaneous activity in patients with persistent symptoms and cognitive deficits. In this paper, we examine visual cortex in the context of the remerging notion of thalamic dysfunction in schizophrenia. We examined specific regional and longer-range abnormalities in sensory and thalamic circuits in schizophrenia, and whether these patterns are strong enough to discriminate symptomatic patients from controls...
January 12, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28077120/altered-fractional-amplitude-of-low-frequency-fluctuation-associated-with-cognitive-dysfunction-in-first-episode-drug-na%C3%A3-ve-major-depressive-disorder-patients
#5
Manli Huang, Shaojia Lu, Liang Yu, Lingjiang Li, Peng Zhang, Jianbo Hu, Weihua Zhou, Shaohua Hu, Ning Wei, Jinwen Huang, Jian Weng, Yi Xu
BACKGROUND: Previous studies have demonstrated that abnormities of both resting-state brain activity and cognitive dysfunction are frequently observed in patients with major depressive disorder (MDD). However, the underlying relationship between these two aspects is less investigated. In this context, the aim of the present study was to investigate the association between cognitive dysfunction and altered resting-state brain function in first-episode drug-naïve MDD patients. METHODS: Twenty-five drug-naïve MDD patients and twenty-six age-, sex-, and education-matched normal controls were recruited in this study...
January 11, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28057091/-resting-state-functional-magnetic-resonance-study-of-brain-function-changes-after-tips-operation-in-patients-with-liver-cirrhosis
#6
C Liu, H B Wang, Y Q Yu, M Q Wang, G B Zhang, L Y Xu, J M Wu
Objective: To investigate the brain function changes in cirrhosis patients after transjugular intrahepatic portosystemic shunt (TIPS), resting-state functional MRI (rs-fMRI) performed and fractional amplitude of low frequency fluctuation (fALFF) was analyzed. Methods: From January 2014 to February 2016, a total of 96 cirrhotic patients from invasive technology department and infection department in the First Affiliated Hospital of Anhui Medical University were selected , the blood ammonia data of 96 cirrhotic patients with TIPS operation in four groups were collected after 1, 3, 6 and 12 month, and all subjects performed rs-fMRI scans...
December 20, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28048305/su-f-j-139-amplitude-of-low-frequency-fluctuation-alff-and-regional-homogeneity-reho-study-of-the-respiration-motion-control-byhypnosis
#7
Y Liu, R Li, Y Xie
PURPOSE: Respiration control by hypnosis is a method in reducing the detriment to the healthy organs or organizations for patients during radiotherapy, especially for lung and abdomen cancer (Fig.1). It's hypothesized that there exists alterations neurological brain activity during the hypnosis state of respiratory motion control in comparison with resting state. METHODS: Thirteen healthy volunteers were organized to participate in a hypnosis experiment that consisted of two sectional scans of functional magnetic resonance imaging (fMRI), rest state condition (RSC) scanning and hypnosis state condition (HSC) scanning...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27993673/propofol-attenuates-low-frequency-fluctuations-of-resting-state-fmri-bold-signal-in-the-anterior-frontal-cortex-upon-loss-of-consciousness
#8
Xiaolin Liu, Kathryn K Lauer, B Douglas Ward, Christopher Roberts, Suyan Liu, Suneeta Gollapudy, Robert Rohloff, William Gross, Guangyu Chen, Zhan Xu, Jeffrey R Binder, Shi-Jiang Li, Anthony G Hudetz
Recent studies indicate that spontaneous low-frequency fluctuations (LFFs) of resting-state functional magnetic resonance imaging (rs-fMRI) blood oxygen level-dependent (BOLD) signals are driven by the slow (<0.1Hz) modulation of ongoing neuronal activity synchronized locally and across remote brain regions. How regional LFFs of the BOLD fMRI signal are altered during anesthetic-induced alteration of consciousness is not well understood. Using rs-fMRI in 15 healthy participants, we show that during administration of propofol to achieve loss of behavioral responsiveness indexing unconsciousness, the fractional amplitude of LFF (fALFF index) was reduced in comparison to wakeful baseline in the anterior frontal regions, temporal pole, hippocampus, parahippocampal gyrus, and amygdala...
December 16, 2016: NeuroImage
https://www.readbyqxmd.com/read/27903342/-fractional-amplitude-of-low-frequency-fluctuations-in-childhood-and-adolescence-onset-schizophrenia-a-resting-state-fmri-study
#9
D Lü, R R Shao, Y H Liang, Y H Xia, S Q Guo
Objective: To explore the whole brain activity features of childhood and adolescence-onset schizophrenia using resting state fMRI. Methods: A total of 63 childhood and adolescence-onset schizophrenia patients (patients group), admitted to the second affiliated hospital of Xinxiang Medical University from October 2013 to October 2015 and fulfilled our inclusion criteria, and 39 healthy controls with age, sex and education matched (control group) were enrolled, then a resting-state fMRI scan was conducted for each participant...
November 22, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27878584/altered-intrinsic-brain-activity-after-chemotherapy-in-patients-with-gastric-cancer-a-preliminary-study
#10
Hyun Gi Kim, Na-Young Shin, Yunjin Bak, Kyung Ran Kim, Young-Chul Jung, Kyunghwa Han, Seung-Koo Lee, Soo Mee Lim
OBJECTIVES: To characterize the pattern of altered intrinsic brain activity in gastric cancer patients after chemotherapy (CTx). METHODS: Patients before and after CTx (n = 14) and control subjects (n = 11) underwent resting-state functional MRI (rsfMRI) at baseline and 3 months after CTx. Regional homogeneity (ReHo), amplitude of low-frequency fluctuation (ALFF), and fractional ALFF (fALFF) were calculated and compared between the groups using the two-sample t test...
November 23, 2016: European Radiology
https://www.readbyqxmd.com/read/27771857/brain-alterations-in-low-frequency-fluctuations-across-multiple-bands-in-obsessive-compulsive-disorder
#11
Mònica Giménez, Andrés Guinea-Izquierdo, Victoria Villalta-Gil, Ignacio Martínez-Zalacaín, Cinto Segalàs, Marta Subirà, Eva Real, Jesús Pujol, Ben J Harrison, Josep Maria Haro, Joao R Sato, Marcelo Q Hoexter, Narcís Cardoner, Pino Alonso, José Manuel Menchón, Carles Soriano-Mas
The extent of functional abnormalities in frontal-subcortical circuits in obsessive-compulsive disorder (OCD) is still unclear. Although neuroimaging studies, in general, and resting-state functional Magnetic Resonance Imaging (rs-fMRI), in particular, have provided relevant information regarding such alterations, rs-fMRI studies have been typically limited to the analysis of between-region functional connectivity alterations at low-frequency signal fluctuations (i.e., <0.08 Hz). Conversely, the local attributes of Blood Oxygen Level Dependent (BOLD) signal across different frequency bands have been seldom studied, although they may provide valuable information...
October 22, 2016: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/27734308/functional-mri-signal-fluctuations-highlight-altered-resting-brain-activity-in-huntington-s-disease
#12
Chiara Sarappa, Elena Salvatore, Alessandro Filla, Sirio Cocozza, Cinzia Valeria Russo, Francesco Saccà, Arturo Brunetti, Giuseppe De Michele, Mario Quarantelli
The fractional Amplitude of Low Frequency Fluctuations (fALFF) and the degree of local synchronization (Regional Homogeneity - ReHo) of resting-state BOLD signal have been suggested to map spontaneous neuronal activity and local functional connectivity, respectively. We compared voxelwise, independent of atrophy, the fALFF and ReHo patterns of 11 presymptomatic (ps-HD) and 28 symptomatic (sHD) Huntington's disease mutation carriers, with those of 40 normal volunteers, and tested their possible correlations with the motor and cognitive subscores of the Unified Huntington's Disease Rating Scale...
October 12, 2016: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/27718507/a-resting-state-fmri-study-of-obese-females-between-pre-and-postprandial-states-before-and-after-bariatric-surgery
#13
Lyle Wiemerslage, Wei Zhou, Gaia Olivo, Julia Stark, Pleunie S Hogenkamp, Elna-Marie Larsson, Magnus Sundbom, Helgi B Schiöth
Past studies utilizing resting-state functional MRI (rsfMRI), have shown that obese humans exhibit altered activity in brain areas related to reward compared to normal-weight controls. However, to what extent bariatric surgery-induced weight loss alters resting-state brain activity in obese humans is less well-studied. Thus, we measured the fractional amplitude of low-frequency fluctuations (fALFF) from eyes-closed, rsfMRI in obese females (n = 11, mean age = 42 years, mean BMI = 41 kg/m(2) ) in both a pre- and post-prandial state at two time points: four weeks before, and four weeks after bariatric surgery...
October 8, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27716674/insula-and-inferior-frontal-gyrus-activities-protect-memory-performance-against-alzheimer-s-disease-pathology-in-old-age
#14
Feng Lin, Ping Ren, Raymond Y Lo, Benjamin P Chapman, Alanna Jacobs, Timothy M Baran, Anton P Porsteinsson, John J Foxe
Apolipoprotein E (APOE) ɛ4 carriers and patients with amnestic mild cognitive impairment (MCI) have high risk of developing Alzheimer's disease (AD). The Scaffolding Theory of Aging and Cognition proposes that recruitment of additional frontal brain regions can protect cognition against aging. This thesis has yet to be fully tested in older adults at high risk for AD. In the present study, 75 older participants (mean age: 74 years) were included. Applying a voxel-wise approach, fractional amplitude of low-frequency fluctuations (fALFF) in resting-state functional neuroimaging data were analyzed as a function of APOEɛ4 status (carrier versus noncarrier) and clinical status (healthy control [HC] versus MCI) using a 2×2 analysis of covariance (ANCOVA)...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27698361/short-term-effects-of-risperidone-monotherapy-on-spontaneous-brain-activity-in-first-episode-treatment-na%C3%A3-ve-schizophrenia-patients-a-longitudinal-fmri-study
#15
Mao-Lin Hu, Xiao-Fen Zong, Jun-Jie Zheng, Spiro P Pantazatos, Jeffrey M Miller, Zong-Chang Li, Yan-Hui Liao, Ying He, Jun Zhou, De-En Sang, Hong-Zeng Zhao, Lu-Xian Lv, Jin-Song Tang, J John Mann, Xiao-Gang Chen
It is unclear whether abnormal spontaneous neural activation patterns found in chronic schizophrenia patients (CSP) are part of the pathogenesis of disease, consequences of chronic illness, or effects of antipsychotic treatment. We performed a longitudinal resting-state functional magnetic resonance imaging (fMRI) study in 42 treatment-naïve first-episode schizophrenia patients (FESP) at baseline and then after 8-weeks of risperidone monotherapy, and compared the findings to 38 healthy volunteers. Spontaneous brain activity was quantified using the fractional amplitude of low-frequency fluctuations (fALFF) and regional homogeneity (ReHo) and compared between patients and controls...
October 4, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27672175/grit-and-the-brain-spontaneous-activity-of-the-dorsomedial-prefrontal-cortex-mediates-the-relationship-between-the-trait-grit-and-academic-performance
#16
Song Wang, Ming Zhou, Taolin Chen, Xun Yang, Guangxiang Chen, Meiyun Wang, Qiyong Gong
As a personality trait, grit involves the tendency to strive to achieve long-term goals with continual passion and perseverance and plays an extremely crucial role in personal achievement. However, the neural mechanisms of grit remain largely unknown. In this study, we aimed to explore the association between grit and the fractional amplitude of low-frequency fluctuations (fALFF) in 217 healthy adolescent students using resting-state functional magnetic resonance imaging (RS-fMRI). We found that an individual's grit was negatively related to the regional fALFF in the right dorsomedial prefrontal cortex (DMPFC), which is involved in self-regulation, planning, goal setting and maintenance, and counterfactual thinking for reflecting on past failures...
September 26, 2016: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/27574878/differential-effects-of-methylphenidate-and-atomoxetine-on-intrinsic-brain-activity-in-children-with-attention-deficit-hyperactivity-disorder
#17
C Y Shang, C G Yan, H Y Lin, W Y Tseng, F X Castellanos, S S Gau
BACKGROUND: Methylphenidate and atomoxetine are commonly prescribed for treating attention deficit hyperactivity disorder (ADHD). However, their therapeutic neural mechanisms remain unclear. METHOD: After baseline evaluation including cognitive testing of the Cambridge Neuropsychological Test Automated Battery (CANTAB), drug-naive children with ADHD (n = 46), aged 7-17 years, were randomly assigned to a 12-week treatment with methylphenidate (n = 22) or atomoxetine (n = 24)...
August 30, 2016: Psychological Medicine
https://www.readbyqxmd.com/read/27524655/mapping-the-effect-of-escitalopram-treatment-on-amplitude-of-low-frequency-fluctuations-in-patients-with-depression-a-resting-state-fmri-study
#18
Li Wang, Xueni Li, Ke Li, Yunai Su, Yawei Zeng, Qinge Zhang, Gang Wang, Zhen Jin, Qingmei Kong, Tianmei Si
Antidepressant medications represent the most common treatment option for major depressive disorder (MDD), but the neuro-psychological mechanisms by which antidepressants act to improve depressive symptoms remain under-specified. We designed this study to assess the effects of escitalopram treatment on spontaneous brain activity of MDD patients using functional magnetic resonance imaging (fMRI). Twenty first-episode drug-naive MDD patients received resting-state fMRI scans before and after 8 weeks of treatment with a selective serotonin reuptake inhibitor - escitalopram...
August 15, 2016: Metabolic Brain Disease
https://www.readbyqxmd.com/read/27475965/altered-spontaneous-neural-activity-in-the-occipital-face-area-reflects-behavioral-deficits-in-developmental-prosopagnosia
#19
Yuanfang Zhao, Jingguang Li, Xiqin Liu, Yiying Song, Ruosi Wang, Zetian Yang, Jia Liu
Individuals with developmental prosopagnosia (DP) exhibit severe difficulties in recognizing faces and to a lesser extent, also exhibit difficulties in recognizing non-face objects. We used fMRI to investigate whether these behavioral deficits could be accounted for by altered spontaneous neural activity. Two aspects of spontaneous neural activity were measured: the intensity of neural activity in a voxel indexed by the fractional amplitude of spontaneous low-frequency fluctuations (fALFF), and the connectivity of a voxel to neighboring voxels indexed by regional homogeneity (ReHo)...
August 2016: Neuropsychologia
https://www.readbyqxmd.com/read/27425430/reduced-spontaneous-neuronal-activity-in-the-insular-cortex-and-thalamus-in-healthy-adults-with-insomnia-symptoms
#20
Chun-Hong Liu, Cun-Zhi Liu, Jihui Zhang, Zhen Yuan, Li-Rong Tang, Chang-Le Tie, Jin Fan, Qing-Quan Liu
Poor sleep and insomnia have been recognized to be strongly correlated with the development of depression. The exploration of the basic mechanism of sleep disturbance could provide the basis for improved understanding and treatment of insomnia and prevention of depression. In this study, 31 subjects with insomnia symptoms as measured by the Hamilton Rating Scale for Depression (HAMD-17) and 71 age- and gender-matched subjects without insomnia symptoms were recruited to participate in a clinical trial. Using resting-state functional magnetic resonance imaging (rs-fMRI), we examined the alterations in spontaneous brain activity between the two groups...
October 1, 2016: Brain Research
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