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https://www.readbyqxmd.com/read/29140504/selective-attention-working-memory-and-executive-function-as-potential-independent-sources-of-cognitive-dysfunction-in-schizophrenia
#1
James M Gold, Benjamin Robinson, Carly J Leonard, Britta Hahn, Shuo Chen, Robert P McMahon, Steven J Luck
People with schizophrenia demonstrate impairments in selective attention, working memory, and executive function. Given the overlap in these constructs, it is unclear if these represent distinct impairments or different manifestations of one higher-order impairment. To examine this question, we administered tasks from the basic cognitive neuroscience literature to measure visual selective attention, working memory capacity, and executive function in 126 people with schizophrenia and 122 healthy volunteers. Patients demonstrated deficits on all tasks with the exception of selective attention guided by strong bottom-up inputs...
November 11, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29138905/fatigue-in-familial-mediterranean-fever-and-its-relations-with-other-clinical-parameters
#2
Mehmet Tuncay Duruoz, Cagri Unal, Duygu Karali Bingul, Firat Ulutatar
Fatigue is a common problem in patients with rheumatic disease. It may cause disability and poor quality of life. The aim of this study is to investigate fatigue in FMF patients as a disabling symptom and its associations with clinical and demographic variables. FMF patients were recruited into the study according to FMF Tel Hashomer criteria. Control group is composed of healthy individuals. Demographic and clinical features of the patients including PRAS scores were noted. Visual analogue score of pain (VAS-pain) and VAS-fatigue were used as clinical parameters...
November 14, 2017: Rheumatology International
https://www.readbyqxmd.com/read/29138750/markers-of-alzheimer-s-disease-in-primary-visual-cortex-in-normal-aging-in-mice
#3
Luis Fernando Hernández-Zimbrón, Montserrat Perez-Hernández, Abigail Torres-Romero, Elisa Gorostieta-Salas, Roberto Gonzalez-Salinas, Rosario Gulias-Cañizo, Hugo Quiroz-Mercado, Edgar Zenteno
Aging is the principal risk factor for the development of Alzheimer's disease (AD). The hallmarks of AD are accumulation of the amyloid-β peptide 1-42 (Aβ42) and abnormal hyperphosphorylation of Tau (p-Tau) protein in different areas of the brain and, more recently reported, in the visual cortex. Recently, Aβ42 peptide overproduction has been involved in visual loss. Similar to AD, in normal aging, there is a significant amyloid deposition related to the overactivation of the aforementioned mechanisms. However, the mechanisms associated with visual loss secondary to age-induced visual cortex affectation are not completely understood...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29138429/brain-network-correlates-of-emotional-aging
#4
Youngwook Lyoo, Sujung Yoon
Physical and cognitive functions typically decline with aging while emotional stability is relatively conserved. The current proof-of-concept study is the first to report of the brain mechanisms underlying emotional aging from a brain network perspective. Two hundred eighty-six healthy subjects aged 20-65 were classified into three groups of the emotionally young, intermediate-aged, and old (E-young, E-intermediate, and E-old, respectively) based on the cluster analysis of the emotion recognition task data...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29137932/the-tibial-nerve-compression-test-for-the-diagnosis-of-lumbar-spinal-canal-stenosis-a-simple-and-reliable-physical-examination-for-use-by-primary-care-physicians
#5
Shu Adachi, Atsushi Nakano, Akihiro Kin, Ichiro Baba, Yoshitaka Kurokawa, Masashi Neo
OBJECTIVES: In the present study, we aimed to evaluate the diagnostic accuracy and suitability of the 'Tibial Nerve Compression Test (TNCT)' as a screening tool for lumbar spinal canal stenosis (LSS). METHODS: A total of 108 consecutive patients admitted to our hospital for surgical treatment or diagnosis of LSS were included in this study. Fifty healthy volunteers were examined as a control group. The severity of tenderness was scored (tenderness score) and measured on a visual analogue scale (P-VAS score)...
November 11, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/29137725/a-gait-retraining-system-using-augmented-reality-to-modify-footprint-parameters-effects-on-lower-limb-sagittal-plane-kinematics
#6
Sami Bennour, Baptiste Ulrich, Thomas Legrand, Brigitte M Jolles, Julien Favre
Improving lower-limb flexion/extension angles during walking is important for the treatment of numerous pathologies. Currently, these gait retraining procedures are mostly qualitative, often based on visual assessment and oral instructions. This study aimed to propose an alternative method combining motion capture and display of target footprints on the floor. The second objectives were to determine the error in footprint modifications and the effects of footprint modifications on lower-limb flexion/extension angles...
November 11, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29137009/brain-metabolism-in-patients-with-freezing-of-gait-after-hypoxic-ischemic-brain-injury-a-pilot-study
#7
Seo Yeon Yoon, Sang Chul Lee, Na Young Kim, Young-Sil An, Yong Wook Kim
Movement disorders are 1 of the long-term neurological complications that can occur after hypoxic-ischemic brain injury (HIBI). However, freezing of gait (FOG) after HIBI is rare. The aim of this study was to examine the brain metabolism of patients with FOG after HIBI using F-18 fluoro-2-deoxy-D-glucose positron emission tomography (F-18 FDG PET).We consecutively enrolled 11 patients with FOG after HIBI. The patients' overall brain metabolism was measured by F-18 FDG PET, and we compared their regional brain metabolic activity with that from 15 healthy controls using a voxel-by-voxel-based statistical mapping analysis...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29135602/ocular-surface-alterations-in-the-context-of-corneal-in-vivo-confocal-microscopic-characteristics-in-patients-with-fibromyalgia
#8
Kadriye Erkan Turan, Sibel Kocabeyoglu, Isin Unal-Cevik, Figen Bezci, Aysen Akinci, Murat Irkec
PURPOSE: To quantify the morphology of corneal basal epithelium and subbasal nerves and to evaluate the ocular surface alterations in patients with fibromyalgia (FM). METHODS: Patients with FM (n = 34) and healthy controls (n = 42) were enrolled. All participants underwent ocular surface tests in the following order: corneal sensitivity, tear film breakup time, lissamine green staining, Schirmer test, and the Ocular Surface Disease Index questionnaire. Basal epithelial cells and subbasal nerves were evaluated using in vivo confocal microscopy (IVCM)...
November 9, 2017: Cornea
https://www.readbyqxmd.com/read/29134765/developmental-retinal-ganglion-cell-death-and-retinotopicity-of-the-murine-retinocollicular-projection
#9
Jamie Beros, Jennifer Rodger, Alan R Harvey
During mammalian visual system development, retinal ganglion cells (RGCs) undergo extensive apoptotic death. In mouse retina, approximately 50% of RGCs present at birth (postnatal day 0; P0) die by P5, at a time when axons innervate central targets such as the superior colliculus (SC). We examined whether RGCs that make short-range axonal targeting errors within the contralateral SC are more likely to be eliminated during the peak period of RGC death (P1-P5), compared with RGCs initially making more accurate retinotopic connections...
November 14, 2017: Developmental Neurobiology
https://www.readbyqxmd.com/read/29133663/combined-central-retinal-artery-and-vein-occlusion-with-optic-perineuritis-following-herpes-zoster-dermatitis-in-an-immunocompetent-child
#10
Reema Bansal, Ramandeep Singh, Aastha Takkar, Vivek Lal
A 15-year-old healthy boy developed acute, rapidly progressing visual loss in left eye following herpes zoster dermatitis, with a combined central retinal artery occlusion (CRAO) and central retinal vein occlusion (CRVO), along with optic perineuritis. Laboratory tests were negative. Despite an empirical, intensive antiviral treatment with systemic corticosteroids, and vision could not be restored in the affected eye. Herpes zoster dermatitis, in an immunocompetent individual, may be associated with a combined CRAO and CRVO along with optic perineuritis, leading to profound visual loss...
November 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29133062/anatomical-and-physiological-basis-of-continuous-spike-wave-of-sleep-syndrome-after-early-thalamic-lesions
#11
Alberto Leal, Eulália Calado, José P Vieira, Carla Mendonça, José C Ferreira, Hugo Ferreira, Daniel Carvalho, Fátima Furtado, Roseli Gomes, José P Monteiro
OBJECTIVE: Early neonatal thalamic lesions account for about 14% of continuous spike-wave of sleep (CSWS) syndrome, representing the most common etiology in this epileptic encephalopathy in children, and promise useful insights into the pathophysiology of the disease. METHODS: We describe nine patients with unilateral neonatal thalamic lesions which progressed to CSWS. Longitudinal whole-night and high-density electroencephalograms (EEGs) were performed, as well as detailed imaging and clinical evaluation...
November 10, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29132831/association-between-increased-eeg-signal-complexity-and-cannabis-dependence
#12
Vincent Laprevote, Laura Bon, Julien Krieg, Thomas Schwitzer, Stéphanie Bourion-Bedes, Louis Maillard, Raymund Schwan
Both acute and regular cannabis use affects the functioning of the brain. While several studies have demonstrated that regular cannabis use can impair the capacity to synchronize neural assemblies during specific tasks, less is known about spontaneous brain activity. This can be explored by measuring EEG complexity, which reflects the spontaneous variability of human brain activity. A recent study has shown that acute cannabis use can affect that complexity. Since the characteristics of cannabis use can affect the impact on brain functioning, this study sets out to measure EEG complexity in regular cannabis users with or without dependence, in comparison with healthy controls...
November 10, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29132765/cortical-thinning-correlates-of-changes-in-visuospatial-and-visuoperceptual-performance-in-parkinson-s-disease-a-4-year-follow-up
#13
A I Garcia-Diaz, B Segura, H C Baggio, C Uribe, A Campabadal, A Abos, M J Marti, F Valldeoriola, Y Compta, N Bargallo, C Junque
BACKGROUND: Growing evidence highlights the relevance of posterior cortically-based cognitive deficits in Parkinson's disease (PD) as possible biomarkers of the evolution to dementia. Cross-sectional correlational studies have established a relationship between the degree of atrophy in posterior brain regions and visuospatial and visuoperceptual (VS/VP) impairment. The aim of this study is to address the progressive cortical thinning correlates of VS/VP performance in PD. METHODS: Forty-four PD patients and 20 matched healthy subjects were included in this study and followed for 4 years...
November 7, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29132488/optic-disc-pit-maculopathy-triggered-by-childbirth
#14
Imran Akram, Sereen Fatima
We describe a case of a healthy lady with a known optic disc pit who developed serous maculopathy a few hours after childbirth. We believe this is the first published description of a trigger factor responsible for serous macular detachment in eyes known to have a disc pit. She was successfully treated by means of pars plana vitrectomy and gas injection, resulting in slight visual improvement.
November 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/29131991/enhanced-mental-imagery-and-intact-perceptual-organization-in-schizotypal-personality-disorder
#15
Rebeka Maróthi, Szabolcs Kéri
According to a widely held view, psychotic disorders such as schizophrenia are characterized by a vague boundary between the perception of the external world and the inner imagery of persons, objects, and events. In this study, we addressed the perception-imagery debate in schizotypal personality disorder (SPD). Thirty individuals with SPD and 30 matched healthy subjects completed a lateral masking task. Participants were asked to detect a low-contrast Gabor patch flanked by two collinear Gabor masks. In the perceptual task, the masks were physically present, whereas in the imagery task, participants only imagined the masks...
November 6, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29131721/postural-stability-in-healthy-child-and-youth-athletes-the-effect-of-age-sex-and-concussion-related-factors-on-performance
#16
Melissa Paniccia, Katherine E Wilson, Anne Hunt, Michelle Keightley, Karl Zabjek, Tim Taha, Isabelle Gagnon, Nick Reed
BACKGROUND: Postural stability plays a key role in sport performance, especially after concussion. Specific to healthy child and youth athletes, little is known about the influence development and sex may have on postural stability while considering other subjective clinical measures used in baseline/preinjury concussion assessment. This study aims to describe age- and sex-based trends in postural stability in uninjured child and youth athletes at baseline while accounting for concussion-related factors...
November 1, 2017: Sports Health
https://www.readbyqxmd.com/read/29128736/optimal-practice-conditions-enhance-the-benefits-of-gradually-increasing-error-opportunities-on-retention-of-a-stepping-sequence-task
#17
Danielle Levac, Kate Driscoll, Jessica Galvez, Kathleen Mercado, Lindsey O'Neil
INTRODUCTION: Physical therapists should implement practice conditions that promote motor skill learning after neurological injury. Errorful and errorless practice conditions are effective for different populations and tasks. Errorful learning provides opportunities for learners to make task-relevant choices. Enhancing learner autonomy through choice opportunities is a key component of the Optimizing Performance through Intrinsic Motivation and Attention for Learning (OPTIMAL) theory of motor learning...
November 9, 2017: Human Movement Science
https://www.readbyqxmd.com/read/29128523/acute-effect-of-smoking-and-smoking-abstinence-on-energy-intake-and-appetite-related-hormones-blood-concentrations
#18
M Yannakoulia, C A Anastasiou, K Zachari, M Sidiropoulou, P Katsaounou, R Tenta
The effect of smoking on energy balance and the underlying mechanisms are not fully understood. The aim of the present study is to examine the acute effect of smoking and its abstinence on energy intake, subjective feelings of appetite and related hormones. Fourteen healthy smokers participated in a randomized, crossover study consisting of two trials: the Cigarette trial (participants smoked two cigarettes of their brand within 15min) and the Sham trial (they were asked to hold the cigarette as smoking, but without lighting it)...
November 8, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29126847/visualization-of-painful-inflammation-in-patients-with-pain-after-traumatic-ankle-sprain-using-11-c-d-deprenyl-pet-ct
#19
Mikko Aarnio, Lieuwe Appel, Mats Fredrikson, Torsten Gordh, Olof Wolf, Jens Sörensen, Måns Thulin, Magnus Peterson, Clas Linnman
BACKGROUND AND AIMS: Positron emission tomography (PET) with the radioligand [(11)C]-D-deprenyl has shown increased signal at location of pain in patients with rheumatoid arthritis and chronic whiplash injury. The binding site of [(11)C]-D-deprenyl in peripheral tissues is suggested to be mitochondrial monoamine oxidase in cells engaged in post-traumatic inflammation and tissue repair processes. The association between [(11)C]-D-deprenyl uptake and the transition from acute to chronic pain remain unknown...
November 7, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29126669/what-can-dti-tell-about-early-cognitive-impairment-differentiation-between-mci-subtypes-and-healthy-controls-by-diffusion-tensor-imaging
#20
Gyula Gyebnár, Ádám Szabó, Enikő Sirály, Zsuzsanna Fodor, Anna Sákovics, Pál Salacz, Zoltán Hidasi, Éva Csibri, Gábor Rudas, Lajos R Kozák, Gábor Csukly
Mild cognitive impairment (MCI) gained a lot of interest recently, especially that the conversion rate to Alzheimer Disease (AD) in the amnestic subtype (aMCI) is higher than in the non-amnestic subtype (naMCI). We aimed to determine whether and how diffusion-weighted MRI (DWI) using the diffusion tensor model (DTI) can differentiate MCI subtypes from healthy subjects. High resolution 3D T1W and DWI images of patients (aMCI, n = 18; naMCI, n = 20; according to Petersen criteria) and controls (n = 27) were acquired at 3T and processed using ExploreDTI and SPM...
October 31, 2017: Psychiatry Research
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