keyword
MENU ▼
Read by QxMD icon Read
search

Occipital lobe function

keyword
https://www.readbyqxmd.com/read/28812315/metabolite-cycled-steam-and-semi-laser-localization-for-mr-spectroscopy-of-the-human-brain-at-9-4t
#1
Ioannis-Angelos Giapitzakis, Tingting Shao, Nikolai Avdievich, Ralf Mekle, Roland Kreis, Anke Henning
PURPOSE: Metabolite cycling (MC) is an MRS technique for the simultaneous acquisition of water and metabolite spectra that avoids chemical exchange saturation transfer effects and for which water may serve as a reference signal or contain additional information in functional or diffusion studies. Here, MC was developed for human investigations at ultrahigh field. METHODS: MC-STEAM and MC-semi-LASER are introduced at 9.4T with an optimized inversion pulse and elaborate coil setup...
August 15, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28810250/cerebral-small-vessel-disease-is-associated-with-dysregulation-in-the-ubiquitin-proteasome-system-and-other-major-cellular-pathways-in-specific-brain-regions
#2
Marie-Françoise Ritz, Caspar Grond-Ginsbach, Felix Fluri, Manja Kloss, Markus Tolnay, Nils Peters, Stefan Engelter, Philippe Lyrer
BACKGROUND/AIMS: Cerebral small vessel disease (SVD) is characterized by periventricular white matter (WM) changes and can lead to vascular dementia, the second most common form of age-dependent dementia. The pathogenesis of the disease remains poorly understood, and studies of its molecular basis are limited. By profiling gene expression of dissected postmortem brain tissue in SVD patients and comparisons with tissue of nonneurological controls, we aimed to identify genes and processes that are involved in the pathogenesis of SVD to gain new pathogenetic insights...
August 16, 2017: Neuro-degenerative Diseases
https://www.readbyqxmd.com/read/28777753/gender-based-cerebral-perfusion-differences-in-46-034-functional-neuroimaging-scans
#3
Daniel G Amen, Manuel Trujillo, David Keator, Derek V Taylor, Kristen Willeumier, Somayeh Meysami, Cyrus A Raji
BACKGROUND: Studies have reported that females have widespread increases in regional cerebral blood flow, but the studies were relatively small and inconsistent. OBJECTIVE: Here we analyzed a healthy and very large psychiatric population to determine the effect of gender, using single photon emission computed tomography (SPECT). METHODS: Whole brain and region of interest (ROI) gender differences were analyzed in a total of 46,034 SPECT scans at baseline and concentration...
August 4, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28774647/discrimination-of-a-medial-functional-module-within-the-temporal-lobe-using-an-effective-connectivity-model-a-ccep-study
#4
Julien Krieg, Laurent Koessler, Jacques Jonas, Sophie Colnat-Coulbois, Jean-Pierre Vignal, Christian G Bénar, Louis G Maillard
The temporal lobe is classically divided in two functional systems: the ventral visual pathway and the medial temporal memory system. However, their functional separation has been challenged by studies suggesting that the medial temporal lobe could be best understood as an extension of the hierarchically organized ventral visual pathway. Our purpose was to investigate (i) whether cerebral regions within the temporal lobe could be grouped into distinct functional assemblies, and (ii) which regions were central within these functional assemblies...
July 31, 2017: NeuroImage
https://www.readbyqxmd.com/read/28732352/cerebral-blood-flow-changes-in-remitted-early-and-late-onset-depression-patients
#5
Wenxiang Liao, Ze Wang, Xiangrong Zhang, Hao Shu, Zan Wang, Duan Liu, Zhijun Zhang
Abnormal cerebral blood flow (CBF) is reportedly associated with major depressive disorder (MDD). We have investigated CBF changes in early-onset depression (EOD) and late-onset depression (LOD), and their impact on cognitive function. Thirty-two remitted EOD patients, 32 remitted LOD patients, and 43 age-matched healthy controls were recruited, and the pulsed arterial spin labeling data were scanned under 3.0T MRI and processed through voxel-by-voxel statistical analysis. Compared to healthy controls, LOD patients had decreased normalized CBF in the bilateral precuneus, cuneus, right fronto-cingulate-striatal areas, and right temporal, occipital and parietal lobes, but increased normalized CBF in the left frontal and temporal cortices and the cingulate gyrus...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28729926/coherence-of-bold-signal-and-electrical-activity-in-the-human-brain-during-deep-sevoflurane-anesthesia
#6
Daniel Golkowski, Andreas Ranft, Tobias Kiel, Valentin Riedl, Philipp Kohl, Guido Rohrer, Joachim Pientka, Sebastian Berger, Christine Preibisch, Claus Zimmer, George A Mashour, Gerhard Schneider, Eberhard F Kochs, Rüdiger Ilg, Denis Jordan
INTRODUCTION: Changes in neural activity induce changes in functional magnetic resonance (fMRI) blood oxygenation level dependent (BOLD) signal. Commonly, increases in BOLD signal are ascribed to cellular excitation. OBJECTIVE: The relationship between electrical activity and BOLD signal in the human brain was probed on the basis of burst suppression EEG. This condition includes two distinct states of high and low electrical activity. METHODS: Resting-state simultaneous EEG and BOLD measurements were acquired during deep sevoflurane anesthesia with burst suppression EEG in nineteen healthy volunteers...
July 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28729918/white-matter-sexual-dimorphism-of-the-adult-human-brain
#7
Ali K Bourisly, Grace Gejo, Abrar A Hayat, Lamya Alsarraf, Fatima M Dashti, Margherita Di Paola
Sex-biased psychophysiology, behavior, brain function, and conditions are extensive, yet underlying structural brain mechanisms remain unclear. There is contradicting evidence regarding sexual dimorphism when it comes to brain structure, and there is still no consensus on whether or not there exists such a dimorphism for brain white matter. Therefore, we conducted a voxel-based morphometry (VBM) analysis along with global volume analysis for white matter across sex. We analyzed 384 T1-weighted MRI brain images (192 male, 192 female) to investigate any differences in white matter (WM) between males and females...
2017: Translational Neuroscience
https://www.readbyqxmd.com/read/28727713/local-brain-activity-differences-between-herpes-zoster-and-postherpetic-neuralgia-patients-a-resting-state-functional-mri-study
#8
Song Cao, Ying Li, Wenwen Deng, Bangyong Qin, Yi Zhang, Peng Xie, Jie Yuan, Buwei Yu, Tian Yu
BACKGROUND: Herpes zoster (HZ) can develop into postherpetic neuralgia (PHN), both of which are painful diseases. PHN patients suffer chronic pain and emotional disorders. Previous studies showed that the PHN brain displayed abnormal activity and structural change, but the difference in brain activity between HZ and PHN is still not known. OBJECTIVES: To identify regional brain activity changes in HZ and PHN brains with resting-state functional magnetic resonance imaging (rs-fMRI) technique, and to observe the differences between HZ and PHN patients...
July 2017: Pain Physician
https://www.readbyqxmd.com/read/28709046/ankle-brachial-index-mri-markers-and-cognition-the-epidemiology-of-dementia-in-singapore-study
#9
Muhammad Amin Shaik, Narayanaswamy Venketasubramanian, Ching-Yu Cheng, Tien Yin Wong, Henri Vrooman, Mohammad Kamran Ikram, Saima Hilal, Christopher Chen
BACKGROUND AND AIMS: Previous studies showed an independent association of low ankle-brachial index (ABI) with cognitive impairment. However, the association between low ABI and cognition in the presence of both cerebrovascular disease (CeVD) and neurodegeneration is lacking. We aimed at investigating a) the association of low ABI with markers of CeVD and cortical thickness, and b) whether the association of low ABI with cognition is influenced by these markers. METHODS: Data was drawn from the Epidemiology of Dementia In Singapore (EDIS) study where all participants (n = 832) underwent neuropsychological tests and 3T brain magnetic resonance imaging (MRI) to assess CeVD markers as well as cortical thicknesses...
July 5, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28693073/-resting-state-fmri-study-of-emotional-network-in-patients-with-postconcussion-syndrome
#10
X Zhang, R B Qian, X M Fu, B Lin, D Zhang, C S Xia, X P Wei, C S Niu, Y H Wang
Objective: To discuss functional connectivity changes in the emotional network of patients with post-concussion syndrome (PCS) and their clinical significance by resting-state functional magnetic resonance imaging (rs-fMRI). Methods: Twenty-seven patients with PCS were recruited from the Department of Neurosurgery of Anhui provincial hospital affiliated to Anhui medical university from October 2015 to April 2016, and 27 healthy subjects were recruited as the controls. The Hamilton Anxiety Scale (HAMA) and The Hamilton Depression Scale (HAMD) were used to evaluate the emotional state of two groups of subjects...
July 4, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28668411/functional-and-structural-changes-in-gray-matter-of-parkinson-s-disease-patients-with-mild-cognitive-impairment
#11
Boyu Chen, Shanshan Wang, Wenge Sun, Xiuli Shang, Hu Liu, Guohao Liu, Jie Gao, Guoguang Fan
BACKGROUND AND PURPOSE: Cognitive impairment is a common non-motor complication of Parkinson's disease (PD). To investigate cognitive-related changes of gray matter (GM) structure and function in PD using voxel-based morphometry (VBM) and resting state functional connectivity (RSFC). MATERIALS AND METHODS: Resting state functional magnetic resonance imaging (rs-fMRI) and 3D-T1-weighted MRI scans were obtained from 21 PD patients with mild cognitive impairment (PD-MCI), 11 PD patients with normal cognitive function (PD-NC), and 21 healthy controls (HC)...
August 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28667375/different-patterns-of-gray-matter-density-in-early-and-middle-late-onset-parkinson-s-disease-a-voxel-based-morphometry-study
#12
Min Xuan, Xiaojun Guan, Peiyu Huang, Zhujing Shen, Quanquan Gu, Xinfeng Yu, Xiaojun Xu, Wei Luo, Minming Zhang
Early-onset Parkinson's disease (EOPD) has a clinical course and characteristics distinct from middle-late-onset Parkinson's disease (M-LOPD). Although many studies have investigated these differences, the neural mechanisms of these characteristics remain unclear. This study aimed to investigate the morphological differences, and their related clinical significance, between EOPD and M-LOPD patients. We recruited two groups of patients, 28 EOPD patients and 37 M-LOPD patients, and two age- and sex-matched control groups (23 controls in each group)...
June 30, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28667288/brain-functional-connectivity-difference-in-the-complete-network-of-an-entire-village-the-role-of-social-network-size-and-embeddedness
#13
Won-Tak Joo, Seyul Kwak, Yoosik Youm, Jeanyung Chey
Social networks are known to protect cognitive function in old age. For the first time, this study examines how social network size and social network embeddedness measured by k-core score are associated with functional connectivity in the brain using the complete social network of an entire village. According to the results, social network size has both positive and negative associations with functional connectivity; showing no meaningful pattern relative to distance among brain regions. However, older adults deeply embedded in the complete network tend to maintain functional connectivity between long-distance regions even after controlling for other covariates such as age, gender, education, and Mini-Mental State Examination score...
June 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28657428/abnormal-functional-connectivity-of-thalamic-sub-regions-contributes-to-fatigue-in-multiple-sclerosis
#14
Milagros Hidalgo de la Cruz, Alessandro d'Ambrosio, Paola Valsasina, Elisabetta Pagani, Bruno Colombo, Mariaemma Rodegher, Andrea Falini, Giancarlo Comi, Massimo Filippi, Maria Assunta Rocca
OBJECTIVE: To investigate sub-regional thalamic resting-state (RS) functional connectivity (FC) abnormalities in multiple sclerosis (MS) and their correlation with fatigue and its subcomponents (physical, cognitive, and psychosocial). METHODS: From 122 MS patients and 94 healthy controls, 5 thalamic sub-regions (frontal, motor, postcentral, occipital, temporal) were parcellated based on their cortico-thalamic structural connectivity and used for a seed-based RS FC analysis...
June 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28633363/development-initial-testing-and-challenges-of-an-ecologically-valid-reward-prediction-error-fmri-task-for-alcoholism
#15
Anita Cservenka, Kelly E Courtney, Dara G Ghahremani, Kent E Hutchison, Lara A Ray
Aims: To advance translational studies of the role of reward prediction error (PE) in alcohol use disorder, the present study sought to develop and conduct an initial test of an alcohol-specific PE task paradigm using functional magnetic resonance imaging in humans. Methods: Alcohol dependent or social drinkers received small tastes of their preferred alcohol beverage or control beverage, with preceding visual cues indicating whether alcohol (or water) would be delivered...
June 14, 2017: Alcohol and Alcoholism: International Journal of the Medical Council on Alcoholism
https://www.readbyqxmd.com/read/28626967/strategy-over-operation-neural-activation-in-subtraction-and-multiplication-during-fact-retrieval-and-procedural-strategy-use-in-children
#16
Brecht Polspoel, Lien Peters, Maaike Vandermosten, Bert De Smedt
Arithmetic development is characterized by strategy shifts between procedural strategy use and fact retrieval. This study is the first to explicitly investigate children's neural activation associated with the use of these different strategies. Participants were 26 typically developing 4th graders (9- to 10-year-olds), who, in a behavioral session, were asked to verbally report on a trial-by-trial basis how they had solved 100 subtraction and multiplication items. These items were subsequently presented during functional magnetic resonance imaging...
September 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28624681/semantic-word-category-processing-in-semantic-dementia-and-posterior-cortical-atrophy
#17
Zubaida Shebani, Karalyn Patterson, Peter J Nestor, Lara Z Diaz-de-Grenu, Kate Dawson, Friedemann Pulvermüller
There is general agreement that perisylvian language cortex plays a major role in lexical and semantic processing; but the contribution of additional, more widespread, brain areas in the processing of different semantic word categories remains controversial. We investigated word processing in two groups of patients whose neurodegenerative diseases preferentially affect specific parts of the brain, to determine whether their performance would vary as a function of semantic categories proposed to recruit those brain regions...
August 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28594884/correlation-between-white-matter-microstructure-and-executive-functions-suggests-early-developmental-influence-on-long-fibre-tracts-in-preterm-born-adolescents
#18
Brigitte Vollmer, Aiko Lundequist, Gustaf Mårtensson, Zoltan Nagy, Hugo Lagercrantz, Ann-Charlotte Smedler, Hans Forssberg
MAIN OBJECTIVES: Executive functions are frequently a weakness in children born preterm. We examined associations of executive functions and general cognitive abilities with brain structure in preterm born adolescents who were born with appropriate weight for gestational age and who have no radiological signs of preterm brain injury on neuroimaging. METHODS: The Stockholm Neonatal Project (SNP) is a longitudinal, population-based study of children born preterm (<36 weeks of gestation) with very low birth weight (<1501g) between 1988-1993...
2017: PloS One
https://www.readbyqxmd.com/read/28588345/neuroanatomic-variations-in-graves-dysthyroid-ophthalmopathy-as-studied-with-mri
#19
Rona Z Silkiss, Alex R Wade
PURPOSE: To evaluate whether patients with Graves' dysthyroid ophthalmopathy (GDO) have changes in brain anatomy that can be assessed by neuroimaging as compared to age-matched controls. METHODS: We examined 10 female, euthyroid patients with GDO and 14 age and gender matched controls using high-resolution structural MRI scanning. An automatic cortical segmentation algorithm was used to estimate the thickness of each subject's gray matter across the brain. The resulting cortical thickness measurements were transferred to a standard reference space via a template-based warping procedure...
August 2016: Transactions of the American Ophthalmological Society
https://www.readbyqxmd.com/read/28566609/progressive-b%C3%A3-lint-s-syndrome-in-a-patient-demonstrating-dementia-with-lewy-bodies
#20
Yasuhisa Sakurai, Yoshifumi Nakashima
We herein report a 65-year-old man demonstrating dementia with Lewy bodies who first presented with Bálint's syndrome. Two years later, a mild cognitive impairment was noted. From three years after onset, he developed progressive parkinsonism, visual hallucination, and autonomic dysfunction, in line with the deterioration of the cognitive function. Single photon emission computed tomography with a (99m)Tc-ethylcysteinate dimer performed two years after onset revealed hypoperfusion in the restricted area of the bilateral superior parietal lobule, which extended to the lateral occipital cortices within two years...
2017: Internal Medicine
keyword
keyword
93903
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"