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https://www.readbyqxmd.com/read/29667267/the-cerebellum-after-trauma-resting-state-functional-connectivity-of-the-cerebellum-in-posttraumatic-stress-disorder-and-its-dissociative-subtype
#1
Daniela Rabellino, Maria Densmore, Jean Théberge, Margaret C McKinnon, Ruth A Lanius
The cerebellum plays a key role not only in motor function but also in affect and cognition. Although several psychopathological disorders have been associated with overall cerebellar dysfunction, it remains unclear whether different regions of the cerebellum contribute uniquely to psychopathology. Accordingly, we compared seed-based resting-state functional connectivity of the anterior cerebellum (lobule IV-V), of the posterior cerebellum (Crus I), and of the anterior vermis across posttraumatic stress disorder (PTSD; n = 65), its dissociative subtype (PTSD + DS; n = 37), and non-trauma-exposed healthy controls (HC; n = 47)...
April 17, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29667212/breathlessness-amplifies-amygdala-responses-during-affective-processing
#2
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/29666562/preclinical-in-vitro-and-in-vivo-evaluation-of-18-f-fe-suppy-for-cancer-pet-imaging-limitations-of-a-xenograft-model-for-colorectal-cancer
#3
T Balber, J Singer, N Berroterán-Infante, M Dumanic, L Fetty, J Fazekas-Singer, C Vraka, L Nics, M Bergmann, K Pallitsch, H Spreitzer, W Wadsak, M Hacker, E Jensen-Jarolim, H Viernstein, M Mitterhauser
Molecular imaging probes such as PET-tracers have the potential to improve the accuracy of tumor characterization by directly visualizing the biochemical situation. Thus, molecular changes can be detected early before morphological manifestation. The A3 adenosine receptor (A3 AR) is described to be highly expressed in colon cancer cell lines and human colorectal cancer (CRC), suggesting this receptor as a tumor marker. The aim of this preclinical study was the evaluation of [18 F]FE@SUPPY as a PET-tracer for CRC using in vitro imaging and in vivo PET imaging...
2018: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29666038/correlation-of-serum-ccl3-mip-1%C3%AE-levels-with-disease-severity-in-postmenopausal-osteoporotic-females
#4
Hui Wan, Tie-Yong Qian, Xiao-Jing Hu, Ci-You Huang, Wei-Feng Yao
BACKGROUND: The pro-inflammatory protein chemokine cytokine ligand 3 is well-established as a vital regulator of bone resorption and osteoclasts stimulation. AIMS: We sought to investigate if serum chemokine cytokine ligand 3 levels correlated with disease severity in postmenopausal osteoporosis females. STUDY DESIGN: Cross-sectional Study. METHODS: 82 postmenopausal osteoporotic females, 76 postmenopausal non-osteoporotic women and 80 healthy female at childbearing age were recruited...
April 15, 2018: Balkan Medical Journal
https://www.readbyqxmd.com/read/29665759/contralateral-hemisphere-activation-by-unilateral-hand-contraction-reexamining-of-global-and-local-attention
#5
Miloš Stanković, Milkica Nešić
While previous studies have shown that left- (vs. right-) hand contractions can improve the performance of global (vs. local) attention, these results were inconsistent in certain behavioral studies in which the left cerebral hemisphere was found to be specialized for local attention, while the right hemisphere was not specialized for global attention. Thus, we reexamined whether different global (vs. local) attention performances follow left- (vs. right-) hand contractions due to right (vs. left) hemisphere activation...
January 1, 2018: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/29665711/is-rest-really-rest-resting-state-functional-connectivity-during-rest-and-motor-task-paradigms
#6
Michael T Jurkiewicz, Adrian P Crawley, David J Mikulis
Numerous studies have identified the default mode network (DMN) within the brain of healthy individuals, which has been attributed to the ongoing mental activity of the brain during the wakeful resting-state. While engaged during specific resting-state fMRI paradigms, it remains unclear as to whether traditional block-design simple movement fMRI experiments significantly influence the default mode network or other areas. Using blood-oxygen level dependent (BOLD) fMRI we characterized the pattern of functional connectivity in healthy subjects during a resting-state paradigm and compared this to the same resting-state analysis performed on motor task data residual time courses after regressing out the task paradigm...
April 18, 2018: Brain Connectivity
https://www.readbyqxmd.com/read/29665216/peak-visual-gamma-frequency-is-modified-across-the-healthy-menstrual-cycle
#7
Rachael L Sumner, Rebecca L McMilllan, Alexander D Shaw, Krish D Singh, Fred Sundram, Suresh D Muthukumaraswamy
Fluctuations in gonadal hormones over the course of the menstrual cycle are known to cause functional brain changes and are thought to modulate changes in the balance of cortical excitation and inhibition. Animal research has shown this occurs primarily via the major metabolite of progesterone, allopregnanolone, and its action as a positive allosteric modulator of the GABAA receptor. Our study used EEG to record gamma oscillations induced in the visual cortex using stationary and moving gratings. Recordings took place during twenty females' mid-luteal phase when progesterone and estradiol are highest, and early follicular phase when progesterone and estradiol are lowest...
April 17, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29664832/optical-coherence-tomography-angiography-macular-vascular-density-measurements-and-the-central-10-2-visual-field-in-glaucoma
#8
Rafaella C Penteado, Linda M Zangwill, Fábio B Daga, Luke J Saunders, Patricia Isabel C Manalastas, Takuhei Shoji, Tadamichi Akagi, Mark Christopher, Adeleh Yarmohammadi, Sasan Moghimi, Robert N Weinreb
PURPOSE: To evaluate the association between macula vascular density assessed by optical coherence tomography angiography (OCT-A) and central visual field (VF) threshold sensitivities in healthy, glaucoma suspect and glaucoma patients. METHODS: A total of 185 eyes from 38 healthy participants, 31 glaucoma suspects, 72 mild glaucoma patients, and 44 moderate/severe glaucoma patients from the Diagnostic Innovations in Glaucoma Study who underwent OCT-A images of the macula and 10-2 VF testing were enrolled in this observational cross-sectional study...
April 16, 2018: Journal of Glaucoma
https://www.readbyqxmd.com/read/29663982/nicotine-lozenges-in-the-relief-of-behaviorally-provoked-craving
#9
Mitchell Nides, Gilbert Marava Shanga, Amanda Bishop, William D Becker
OBJECTIVES: Environmental cues may precipitate nicotine cravings in smokers. We present 2 studies exploring the efficacy of nicotine mini lozenges to reduce nicotine craving in smokers following behavioral provocation. METHODS: Healthy smokers aged ≥18 years enrolled. In Study 1, participants were stratified by number of cigarettes smoked daily; Study 2 enrolled only heavy smokers. After an abstinence period, participants engaged in behavioral provocation to induce nicotine craving before receiving a nicotine mini lozenge (Study 1: 1...
May 1, 2018: American Journal of Health Behavior
https://www.readbyqxmd.com/read/29663261/evaluation-of-diffusion-tensor-imaging-changes-and-neurocognitive-effects-of-asymptomatic-vitamin-b12-deficiency
#10
Ali Zeynal Abidin Tak, Erdal Dayan, Hacı Taner Bulut
Vitamin B12 plays an important role in the mechanisms which are responsible for myelinization in the central nervous system. It can particularly lead to hematological and neuropsychiatric symptoms when serum levels fall due to insufficient intake with diet or absorption problems. The purpose of this study was to show the cognitive effects in vitamin B12 deficiency cases that have not reached clinical symptom level using neuropsychological tests, and to show possible cerebral neuronal damage using diffusion tensor imaging (DTI) method...
April 16, 2018: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/29663129/effects-of-cogmed-working-memory-training-on-cognitive-performance
#11
Joseph L Etherton, Crystal D Oberle, Jayson Rhoton, Ashley Ney
Research on the cognitive benefits of working memory training programs has produced inconsistent results. Such research has frequently used laboratory-specific training tasks, or dual-task n-back training. The current study used the commercial Cogmed Working Memory (WM) Training program, involving several different training tasks involving visual and auditory input. Healthy college undergraduates were assigned to either the full Cogmed training program of 25, 40-min training sessions; an abbreviated Cogmed program of 25, 20-min training sessions; or a no-contact control group...
April 16, 2018: Psychological Research
https://www.readbyqxmd.com/read/29662447/neural-mechanisms-underlying-time-perception-and-reward-anticipation
#12
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/29662444/distinctive-correspondence-between-separable-visual-attention-functions-and-intrinsic-brain-networks
#13
Adriana L Ruiz-Rizzo, Julia Neitzel, Hermann J Müller, Christian Sorg, Kathrin Finke
Separable visual attention functions are assumed to rely on distinct but interacting neural mechanisms. Bundesen's "theory of visual attention" (TVA) allows the mathematical estimation of independent parameters that characterize individuals' visual attentional capacity (i.e., visual processing speed and visual short-term memory storage capacity) and selectivity functions (i.e., top-down control and spatial laterality). However, it is unclear whether these parameters distinctively map onto different brain networks obtained from intrinsic functional connectivity, which organizes slowly fluctuating ongoing brain activity...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29661378/differential-role-of-nitric-oxide-in-the-psychedelic-symptoms-induced-by-racemic-ketamine-and-esketamine-in-human-volunteers
#14
K Jonkman, R van der Schrier, M van Velzen, L Aarts, E Olofsen, E Sarton, M Niesters, A Dahan
BACKGROUND: Animal studies suggest that N-methyl-d-aspartate receptor (NMDAR) hypofunction and subsequent decline in intracellular nitric oxide (NO) are responsible for development of ketamine-induced psychedelic symptoms. To examine this mechanism in humans, we administered the NO donor sodium nitroprusside during infusion of racemic ketamine (RS-ketamine), containing equal amounts of S(+)- and R(-)-ketamine isomers, or esketamine, containing just the S(+)-isomer. METHODS: In this randomised, double blind, placebo-controlled crossover study, healthy volunteers were treated with sodium nitroprusside 0...
May 2018: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29660533/role-of-lysophosphatidic-acid-in-the-retinal-pigment-epithelium-and-photoreceptors
#15
Grace E Lidgerwood, Andrew J Morris, Alison Conquest, Maciej Daniszewski, Louise A Rooney, Shiang Y Lim, Damián Hernández, Helena H Liang, Penelope Allen, Paul P Connell, Robyn H Guymer, Alex W Hewitt, Alice Pébay
The human retina is a complex structure of organised layers of specialised cells that support the transmission of light signals to the visual cortex. The outermost layer of the retina, the retinal pigment epithelium (RPE) forms part of the blood retina barrier and is implicated in many retinal diseases. Lysophosphatidic acid (LPA) is a bioactive lipid exerting pleiotropic effects in various cell types, during development, normal physiology and disease. Its producing enzyme AUTOTAXIN (ATX) is highly expressed by the pigmented epithelia of the human eye, including the RPE...
April 13, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29659298/agreement-between-visual-assessment-and-2-dimensional-analysis-during-jump-landing-among-healthy-female-athletes
#16
Alon Rabin, Ofira Einstein, Zvi Kozol
CONTEXT:   Altered movement patterns, including increased frontal-plane knee movement and decreased sagittal-plane hip and knee movement, have been associated with several knee disorders. Nevertheless, the ability of clinicians to visually detect such altered movement patterns during high-speed athletic tasks is relatively unknown. OBJECTIVE:   To explore the association between visual assessment and 2-dimensional (2D) analysis of frontal-plane knee movement and sagittal-plane hip and knee movement during a jump-landing task among healthy female athletes...
April 16, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29658983/subclinical-vestibular-dysfunction-in-migraineurs-without-vertigo-a-clinical-study
#17
L Bernetti, C Pellegrino, I Corbelli, S Caproni, P Eusebi, M Faralli, G Ricci, P Calabresi, P Sarchielli
OBJECTIVES: This observational study aimed to investigate the presence of potential vestibular system subclinical dysfunction among migraineurs without a history of vertigo and dizziness compared with healthy controls. METHODS: Patients diagnosed with episodic migraine with and without aura were enrolled. All patients and healthy controls underwent vestibular examination using the following conventional tests: sitting position, Pagnini-McClure's, Dix-Hallpike's, head hanging, video head impulse, subjective visual vertical, Romberg, Fukuda, and caloric vestibular stimulation by Fitzgerald-Hallpike's tests...
April 16, 2018: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/29657892/inversion-recovery-sequences-improve-delineation-of-optic-pathways-in-the-proximity-of-suprasellar-lesions
#18
Herwin Speckter, José Bido, Giancarlo Hernandez, Diones Rivera, Luis Suazo, Santiago Valenzuela, Rafael Fermin, Jairo Oviedo, Bernd Foerster, Cesar Gonzalez, Peter Stoeter
Introduction: In Gamma Knife Radiosurgery (GKRS) of suprasellar lesions, the exact localization of the visual pathways is important to avoid radiation induced optic neuropathy (RION). Reliable identification of the optic nerve, chiasm and tracts can be challenging using routine magnetic resonance imaging, especially in patients with lesions compressing the optic structures or in patients who had prior operation of suprasellar tumors. This study investigates the application of inversion recovery sequences (Fast gray and white matter acquisition T1 inversion recovery, FGATIR) to improve identification of the optic pathway...
2018: Journal of Radiosurgery and SBRT
https://www.readbyqxmd.com/read/29657873/neuropathic-pain-in-pregnant-turkish-women-with-lumbopelvic-pain-and-its-impact-on-health-related-quality-of-life
#19
Filiz Eser, Saniye Nebioğlu, Aygün Aliyeva, Ayşegül Kılıçarslan, Cemal Reşat Atalay, Gizem Özcanlı, Şükran Erten, Funda Uysal
Objectives: To investigate the prevalence of neuropathic pain in pregnant women and to state its influence on the functional status and health-related quality of life (HRQoL) in terms of physical, social, and emotional functioning. Methods: A total of 90 pregnant women with lumbopelvic pain (LPP) and non-pregnant and healthy controls were included. The presence of neuropathic pain was determined using the Leeds assessment of neuropathic symptoms and signs (LANNS) questionnaire...
March 2018: European Journal of Rheumatology
https://www.readbyqxmd.com/read/29657836/resistive-index-of-ophthalmic-artery-correlates-with-retinal-pigment-epithelial-alterations-on-spectral-domain-optical-coherence-tomography-in-diabetic-retinopathy
#20
Manila Khatri, Sandeep Saxena, Apjit Kaur, Shashi K Bhasker, Manoj Kumar, Carsten H Meyer
Background: Retinal pigment epithelium (RPE) plays a significant role in maintenance of integrity of retinal photoreceptors and choriocapillaries. RPE derives its blood supply through ophthalmic artery (OA) via choriocapillaries. RPE topographic alterations have been observed to be associated with severity of retinopathy. The present study was undertaken to assess the correlation between resistive index (RI) of the OA with RPE topographic alterations on Spectral-Domain optical coherence tomography (SD-OCT), to our knowledge, it is for the first time...
2018: International Journal of Retina and Vitreous
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