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https://www.readbyqxmd.com/read/28092659/rem-sleep-selectively-prunes-and-maintains-new-synapses-in-development-and-learning
#1
Wei Li, Lei Ma, Guang Yang, Wen-Biao Gan
The functions and underlying mechanisms of rapid eye movement (REM) sleep remain unclear. Here we show that REM sleep prunes newly formed postsynaptic dendritic spines of layer 5 pyramidal neurons in the mouse motor cortex during development and motor learning. This REM sleep-dependent elimination of new spines facilitates subsequent spine formation during development and when a new motor task is learned, indicating a role for REM sleep in pruning to balance the number of new spines formed over time. Moreover, REM sleep also strengthens and maintains newly formed spines, which are critical for neuronal circuit development and behavioral improvement after learning...
January 16, 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/28092088/erratum-to-dihydromyricetin-improves-hypobaric-hypoxia-induced-memory-impairment-via-modulation-of-sirt3-signaling
#2
Peng Liu, Dan Zou, Ka Chen, Qicheng Zhou, Yanxiang Gao, Yujie Huang, Jundong Zhu, Qianyong Zhang, Mantian Mi
No abstract text is available yet for this article.
January 16, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28091572/a-computational-psychiatry-approach-identifies-how-alpha-2a-noradrenergic-agonist-guanfacine-affects-feature-based-reinforcement-learning-in-the-macaque
#3
S A Hassani, M Oemisch, M Balcarras, S Westendorff, S Ardid, M A van der Meer, P Tiesinga, T Womelsdorf
Noradrenaline is believed to support cognitive flexibility through the alpha 2A noradrenergic receptor (a2A-NAR) acting in prefrontal cortex. Enhanced flexibility has been inferred from improved working memory with the a2A-NA agonist Guanfacine. But it has been unclear whether Guanfacine improves specific attention and learning mechanisms beyond working memory, and whether the drug effects can be formalized computationally to allow single subject predictions. We tested and confirmed these suggestions in a case study with a healthy nonhuman primate performing a feature-based reversal learning task evaluating performance using Bayesian and Reinforcement learning models...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28089578/dual-influences-of-early-life-maternal-deprivation-on-histone-deacetylase-activity-and-recognition-memory-in-rats
#4
Manoel Osório Albuquerque Filho, Betânia Souza de Freitas, Rebeca Carvalho Lacerda Garcia, Pedro Castilhos de Freitas Crivelaro, Nadja Schröder, Maria Noêmia Martins de Lima
Exposure to stress early in life may negatively impact nervous system functioning, including increasing the proneness to learning and memory impairments later in life. Maternal deprivation, a model of early-life stress, hinders memory in adult rats and lessens brain-derived neurotrophic factor (BDNF) levels in the hippocampus in a very heterogeneous way among individuals. The main goal of the present study was to investigate the possible epigenetic modulation underlying recognition memory impairment and reduced BDNF levels in the hippocampus of adult maternally deprived rats...
January 9, 2017: Neuroscience
https://www.readbyqxmd.com/read/28088925/a-randomized-controlled-trial-of-kundalini-yoga-in-mild-cognitive-impairment
#5
Harris A Eyre, Prabha Siddarth, Bianca Acevedo, Kathleen Van Dyk, Pattharee Paholpak, Linda Ercoli, Natalie St Cyr, Hongyu Yang, Dharma S Khalsa, Helen Lavretsky
BACKGROUND: Global population aging will result in increasing rates of cognitive decline and dementia. Thus, effective, low-cost, and low side-effect interventions for the treatment and prevention of cognitive decline are urgently needed. Our study is the first to investigate the effects of Kundalini yoga (KY) training on mild cognitive impairment (MCI). METHODS: Older participants (≥55 years of age) with MCI were randomized to either a 12-week KY intervention or memory enhancement training (MET; gold-standard, active control)...
January 16, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28088728/the-association-between-insomnia-related-sleep-disruptions-and-cognitive-dysfunction-during-the-inter-episode-phase-of-bipolar-disorder
#6
Jennifer C Kanady, Adriane M Soehner, Alexandra B Klein, Allison G Harvey
Sleep disturbance and cognitive dysfunction are two domains of impairment during inter-episode bipolar disorder. Despite evidence demonstrating the importance of sleep for cognition in healthy and sleep-disordered samples, this link has been minimally examined in bipolar disorder. The present study tested the association between insomnia-related sleep disruptions and cognitive dysfunction during inter-episode bipolar disorder. Forty-seven participants with bipolar disorder and a comorbid insomnia diagnosis (BD-Insomnia) and 19 participants with bipolar disorder without sleep disturbance in the last six months (BD-Control) participated in the study...
January 5, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28088683/effects-of-protease-activated-receptor-1-inhibition-on-anxiety-and-fear-following-status-epilepticus
#7
Mihail Fedoriuk, Dmytro Isaev, Oleg Krishtal, Gregory L Holmes, Elena Isaeva
Protease-activated receptor 1 (PAR1) is an important contributor to the pathogenesis of a variety of brain disorders associated with a risk of epilepsy development. Using the lithium-pilocarpine model of temporal lobe epilepsy (TLE), we recently showed that inhibition of this receptor during the first ten days after pilocarpine-induced status epilepticus (SE) results in substantial anti-epileptogenic and neuroprotective effects. As PAR1 is expressed in the central nervous system regions of importance for processing emotional reactions, including amygdala and hippocampus, and TLE is frequently associated with a chronic alteration of the functions of these regions, we tested the hypothesis that PAR1 inhibition could modulate emotionally driven behavioral responses of rats experiencing SE...
January 12, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28088681/maintenance-effects-of-working-memory-intervention-cogmed-in-children-with-symptomatic-epilepsy
#8
Amanda Fuentes, Elizabeth N Kerr
PURPOSE: To extend previous research documenting the benefits of working memory (WM) intervention (Cogmed) immediately post-intervention in children with epilepsy by assessing the 3-month maintenance effects. METHODS: Participants involved in a previous randomized clinical trial (RCT) were invited to participate if they completed Cogmed within the last 3months (n=15) and additional participants (n=13) were prospectively recruited. Standardized assessments of near-transfer effects (i...
January 12, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28088064/improved-cognition-while-cycling-in-parkinson-s-disease-patients-and-healthy-adults
#9
Audrey A Hazamy, Lori J P Altmann, Elizabeth Stegemöller, Dawn Bowers, Hyo Keun Lee, Jonathan Wilson, Michael S Okun, Chris J Hass
Persons with Parkinson's disease (PD) are typically more susceptible than healthy adults to impaired performance when two tasks (dual task interference) are performed simultaneously. This limitation has by many experts been attributed to limitations in cognitive resources. Nearly all studies of dual task performance in PD employ walking or balance-based motor tasks, which are commonly impaired in PD. These tasks can be performed using a combination of one or two executive function tasks. The current study examined whether persons with PD would demonstrate greater dual task effects (DTEs) on cognition compared to healthy older adults (HOAs) during a concurrent cycling task...
January 11, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28087694/iso-%C3%AE-acids-bitter-components-of-beer-prevent-inflammation-and-cognitive-decline-induced-in-a-mouse-model-of-alzheimer-s-disease
#10
Yasuhisa Ano, Atsushi Dhata, Yoshimasa Taniguchi, Ayaka Hoshi, Kazuyuki Uchida, Akihiko Takashima, Hiroyuki Nakayama
Alongside the rapid growth in aging populations worldwide, prevention and therapy for age-related memory decline and dementia are in great demand to maintain a long healthy life. Here we found that iso-α-acids, hop-derived bitter compounds in beer, enhance microglial phagocytosis and suppress inflammation via activation of the peroxisome proliferator-activated receptor (PPAR-γ). In normal mice, oral administration of iso-α-acids led to a significant increase both in CD11b and CD206 double-positive anti-inflammatory type microglia (P<0...
January 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28086758/toxoplasmosis-associated-iris-involving-the-cns-a-case-report-with-longitudinal-analysis-of-t-cell-subsets
#11
Rita Rb-Silva, Claudia Nobrega, Eugénia Reiriz, Soraia Almeida, Rui Sarmento-Castro, Margarida Correia-Neves, Ana Horta
BACKGROUND: HIV-infected patients may present an unforeseen clinical worsening after initiating antiretroviral therapy known as immune reconstitution inflammatory syndrome (IRIS). This syndrome is characterized by a heightened inflammatory response toward infectious or non-infectious triggers, and it may affect different organs. Diagnosis of IRIS involving the central nervous system (CNS-IRIS) is challenging due to heterogeneous manifestations, absence of biomarkers to identify this condition, risk of long-term sequelae and high mortality...
January 13, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28081177/first-behavioural-characterisation-of-a-knockout-mouse-model-for-the-transforming-growth-factor-tgf-%C3%AE-superfamily-cytokine-mic-1-gdf15
#12
Jac Kee Low, Ananthan Ambikairajah, Kani Shang, David A Brown, Vicky W W Tsai, Samuel N Breit, Tim Karl
Macrophage inhibitory cytokine-1 (MIC-1), also known as growth differentiation factor 15 (GDF15), is a stress response cytokine. MIC-1/GDF15 is secreted into the cerebrospinal fluid and increased levels of MIC-1/GDF15 are associated with a variety of diseases including cognitive decline. Furthermore, Mic-1/Gdf15 knockout mice (Mic-1 KO) weigh more, have increased adiposity, associated with increased spontaneous food intake, and exhibit reduced basal energy expenditure and physical activity. The current study was designed to comprehensively determine the role of MIC-1/GDF15 on behavioural domains of male and female knockout mice including locomotion, exploration, anxiety, cognition, social behaviours, and sensorimotor gating...
2017: PloS One
https://www.readbyqxmd.com/read/28079769/posttraumatic-stress-disorder-relapse-and-clitoral-reconstruction-after-female-genital-mutilation
#13
Jasmine Abdulcadir, Francesco Bianchi Demicheli, Alexia Willame, Nathalie Recordon, Patrick Petignat
BACKGROUND: Evidence on clitoral reconstruction after female genital mutilation is lacking. CASE: A woman with female genital mutilation experiencing clitoral pain during sex consulted to undergo clitoral reconstruction. The surgery was complicated by a wound infection responsible for severe postoperative pain. Such genital pain made our patient recall the traumatic experience of genital mutilation and experience a relapse of posttraumatic stress disorder symptoms...
January 9, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28079611/it-is-just-attention-deficit-hyperactivity-disorder%C3%A2-or-is-it
#14
Dana C Won, Christian Guilleminault, Peter J Koltai, Stacey D Quo, Martin T Stein, Irene M Loe
Carly is a 5-year-old girl who presents for an interdisciplinary evaluation due to behaviors at school and home suggestive of attention-deficit hyperactivity disorder (ADHD). Parent report of preschool teacher concerns was consistent with ADHD. Psychological testing showed verbal, visual-spatial, and fluid reasoning IQ scores in the average range; processing speed and working memory were below average. Carly's behavior improved when her mother left the room, and she was attentive during testing with a psychologist...
January 10, 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28079443/breastfeeding-in-women-having-experienced-childhood-sexual-abuse
#15
Constanze Elfgen, Niels Hagenbuch, Gisela Görres, Emina Block, Brigitte Leeners
BACKGROUND: Childhood sexual abuse (CSA) can have a serious effect on general and obstetric health. Breastfeeding includes several triggers for memories of abuse experiences, which will likely influence decisions about breastfeeding and its implementation in daily life. This is important since breastfeeding improves maternal well-being and bonding with the child. Research aim: As breastfeeding strongly influences the long-term health of children, we investigated experiences with breastfeeding in women with a history of CSA...
January 1, 2017: Journal of Human Lactation: Official Journal of International Lactation Consultant Association
https://www.readbyqxmd.com/read/28079056/endurance-and-cycle-to-cycle-uniformity-improvement-in-tri-layered-ceo2-ti-ceo2-resistive-switching-devices-by-changing-top-electrode-material
#16
Anwar Manzoor Rana, Tahira Akbar, Muhammad Ismail, Ejaz Ahmad, Fayyaz Hussain, Ijaz Talib, Muhammad Imran, Khalid Mehmood, Khalid Iqbal, M Younus Nadeem
Resistance switching characteristics of CeO2/Ti/CeO2 tri-layered films sandwiched between Pt bottom electrode and two different top electrodes (Ti and TaN) with different work functions have been investigated. RRAM memory cells composed of TaN/CeO2/Ti/CeO2/Pt reveal better resistive switching performance instead of Ti/CeO2/Ti/CeO2/Pt memory stacks. As compared to the Ti/CeO2 interface, much better ability of TaN/CeO2 interface to store and exchange plays a key role in the RS performance improvement, including lower forming/SET voltages, large memory window (~10(2)) and no significant data degradation during endurance test of >10(4) switching cycles...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078966/visual-and-cross-modal-cues-increase-the-identification-of-overlapping-visual-stimuli-in-balint-s-syndrome
#17
Daniela D'Imperio, Michele Scandola, Valeria Gobbetto, Cristina Bulgarelli, Matteo Salgarello, Renato Avesani, Valentina Moro
INTRODUCTION: Cross-modal interactions improve the processing of external stimuli, particularly when an isolated sensory modality is impaired. When information from different modalities is integrated, object recognition is facilitated probably as a result of bottom-up and top-down processes. The aim of this study was to investigate the potential effects of cross-modal stimulation in a case of simultanagnosia. METHOD: We report a detailed analysis of clinical symptoms and an (18)F-fluorodeoxyglucose (FDG) brain positron emission tomography/computed tomography (PET/CT) study of a patient affected by Balint's syndrome, a rare and invasive visual-spatial disorder following bilateral parieto-occipital lesions...
January 12, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/28078612/ameliorative-effect-of-ginsenoside-rg1-on-lipopolysaccharide-induced-cognitive-impairment-role-of-cholinergic-system
#18
Yang Jin, Jian Peng, Xiaona Wang, Dong Zhang, Tianyin Wang
Bacterial endotoxin lipopolysaccharide (LPS) can induce systemic inflammation, and therefore disrupt learning and memory processes. Ginsenoside Rg1, a major bioactive component of ginseng, is shown to greatly improve cognitive function. The present study was designed to further investigate whether administration of ginsenoside Rg1 can ameliorate LPS-induced cognitive impairment in the Y-maze and Morris water maze (MWM) task, and to explore the underlying mechanisms. Results showed that exposure to LPS (500 μg/kg) significantly impaired working and spatial memory and that repeated treatment with ginsenoside Rg1 (200 mg/kg/day, for 30 days) could effectively alleviate the LPS-induced cognitive decline as indicated by increased working and spatial memory in the Y-maze and MWM tests...
January 11, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28078117/effect-of-gender-on-psychosocial-adjustment-of-colorectal-cancer-survivors-with-ostomy
#19
Sital Gautam, Anju Poudel
BACKGROUND: Stoma can pose extensive challenges for colorectal cancer survivors. Identifying the psychological and social adjustment among them and how it differs by gender will aid in identifying those particularly at risk of having poor adjustment and in planning programs to improve their adjustment. The purpose of this study was to determine the effect of gender on psychosocial adjustment of colorectal cancer survivors with ostomy. METHODS: A descriptive cross sectional study was carried out in the stoma clinic of B...
December 2016: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28077418/a-novel-humanized-mouse-model-with-significant-improvement-of-class-switched-antigen-specific-antibody-production
#20
Hua Yu, Chiara Borsotti, Jean-Nicolas Schickel, Shu Zhu, Till Strowig, Elizabeth E Eynon, Davor Frleta, Cagan Gurer, Andrew J Murphy, George D Yancopoulos, Eric Meffre, Markus G Manz, Richard A Flavell
Humanized mice are a powerful tool for the study of human hematopoiesis and immune function in vivo. However, the existing models cannot support robust adaptive immune responses, especially the generation of class-switched, antigen-specific antibody responses. Here we describe a new mouse strain, in which human IL6 gene encoding the cytokine that is important for B and T cell differentiation was knocked into its respective mouse locus. The provision of human IL6 not only enhanced thymopoiesis and periphery T-cell engraftment, but also significantly increased class switched memory B cells and serum IgG...
January 11, 2017: Blood
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