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https://www.readbyqxmd.com/read/28938405/short-term-high-fat-diet-increases-leptin-activation-of-cart-neurons-and-advances-puberty-in-female-mice
#1
Jade Cabestre Venancio, Lisandra Oliveira Margatho, Rodrigo C Rorato, Roberta Ribeiro Costa Rosales, Lucas Kniess Debarba, Ricardo Coletti, Jose Antunes-Rodrigues, Carol F Elias, Lucila Leico K Elias
Leptin is a permissive factor for puberty initiation, participating as a metabolic cue in the activation of the kisspeptin (Kiss1)-gonadotropin-releasing hormone neuronal circuitry however, it has no direct effect on Kiss1 neurons. Leptin acts on hypothalamic CART neurons, participating in the regulation of energy homeostasis. We investigated the influence of a short-term high-fat diet (HFD) on the effect of leptin on puberty timing. Kiss1-hrGFP female mice received a HFD or regular diet (RD) after weaning at postnatal day 21 (PN21) and were studied at PN28 and PN32...
September 4, 2017: Endocrinology
https://www.readbyqxmd.com/read/28938227/do-prereaders-auditory-processing-and-speech-perception-predict-later-literacy
#2
Sophie Vanvooren, Hanne Poelmans, Astrid De Vos, Pol Ghesquière, Jan Wouters
Developmental dyslexia has frequently been linked to deficits in auditory processing and speech perception. However, the presence and precise nature of these deficits and the direction of their relation with reading, remains debated. In this longitudinal study, 87 five-year-olds at high and low family risk for dyslexia were followed before and during different stages of reading acquisition. The processing of different auditory cues was investigated, together with performance on speech perception and phonology and reading...
September 19, 2017: Research in Developmental Disabilities
https://www.readbyqxmd.com/read/28937301/attentional-modulation-and-individual-differences-in-explaining-the-changing-role-of-fundamental-frequency-in-korean-laryngeal-stop-perception
#3
Eun Jong Kong, Hyunjung Lee
Previous research has shown differential degrees of attention in processing hierarchical linguistic information where higher order cues require greater attention in speech processing. The current study investigated the influence of attentional resources on acoustic cue weightings in speech perception by examining Korean listeners' identifications of the three-way laryngeal stops (tense vs. lax vs. aspirated). Using a dual-task paradigm, we presented 28 adult Korean listeners with identification tasks blocked by no-distractor versus distractor conditions where arithmetic calculations distracted the listeners' speech processing...
September 1, 2017: Language and Speech
https://www.readbyqxmd.com/read/28937300/infants-processing-of-prosodic-cues-electrophysiological-evidence-for-boundary-perception-beyond-pause-detection
#4
Julia Holzgrefe-Lang, Caroline Wellmann, Barbara Höhle, Isabell Wartenburger
Infants as young as six months are sensitive to prosodic phrase boundaries marked by three acoustic cues: pitch change, final lengthening, and pause. Behavioral studies suggest that a language-specific weighting of these cues develops during the first year of life; recent work on German revealed that eight-month-olds, unlike six-month-olds, are capable of perceiving a prosodic boundary on the basis of pitch change and final lengthening only. The present study uses Event-Related Potentials (ERPs) to investigate the neuro-cognitive development of prosodic cue perception in German-learning infants...
September 1, 2017: Language and Speech
https://www.readbyqxmd.com/read/28936978/advances-on-polyphenism-in-insects
#5
Xian-Ci Xue, Li Yu
Polyphenism denotes that one genome produces two or more distinct phenotypes due to environmental inductions. Many cases have been reported in insects, for example, metamorphosis, seasonal polyphenism, the caste of eusocial insects and so on. Polyphenism is one of the most important reasons for insects to survive and thrive, because insects can adapt and use the environmental cues around them in order to avoid predators and reproduce by changing their phenotypes. Polyphenism has received growing attentions, ranging from the earlier description of this phenomenon to the exploration of possible inducing factors...
September 20, 2017: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/28936643/climate-variability-affects-the-germination-strategies-exhibited-by-arid-land-plants
#6
Sarah Barga, Thomas E Dilts, Elizabeth A Leger
Spatial and temporal environmental variability can lead to variation in selection pressures across a landscape. Strategies for coping with environmental heterogeneity range from specialized phenotypic responses to a narrow range of conditions to generalist strategies that function under a range of conditions. Here, we ask how mean climate and climate variation at individual sites and across a species' range affect the specialist-generalist spectrum of germination strategies exhibited by 10 arid land forbs. We investigated these relationships using climate data for the western United States, occurrence records from herbaria, and germination trials with field-collected seeds, and predicted that generalist strategies would be most common in species that experience a high degree of climate variation or occur over a wide range of conditions...
September 21, 2017: Oecologia
https://www.readbyqxmd.com/read/28936186/assessing-the-formation-of-experience-based-gender-expectations-in-an-implicit-learning-scenario
#7
Anton Öttl, Dawn M Behne
The present study investigates the formation of new word-referent associations in an implicit learning scenario, using a gender-coded artificial language with spoken words and visual referents. Previous research has shown that when participants are explicitly instructed about the gender-coding system underlying an artificial lexicon, they monitor the frequency of exposure to male vs. female referents within this lexicon, and subsequently use this probabilistic information to predict the gender of an upcoming referent...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28936159/neural-coding-for-action-execution-and-action-observation-in-the-prefrontal-cortex-and-its-role-in-the-organization-of-socially-driven-behavior
#8
REVIEW
Stefano Rozzi, Leonardo Fogassi
The lateral prefrontal cortex (LPF) plays a fundamental role in planning, organizing, and optimizing behavioral performance. Neuroanatomical and neurophysiological studies have suggested that in this cortical sector, information processing becomes more abstract when moving from caudal to rostral and that such processing involves parietal and premotor areas. We review studies that have shown that the LPF, in addition to its involvement in implementing rules and setting behavioral goals, activates during the execution of forelimb movements even in the absence of a learned relationship between an instruction and its associated motor output...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28935857/sensorimotor-computation-underlying-phototaxis-in-zebrafish
#9
Sébastien Wolf, Alexis M Dubreuil, Tommaso Bertoni, Urs Lucas Böhm, Volker Bormuth, Raphaël Candelier, Sophia Karpenko, David G C Hildebrand, Isaac H Bianco, Rémi Monasson, Georges Debrégeas
Animals continuously gather sensory cues to move towards favourable environments. Efficient goal-directed navigation requires sensory perception and motor commands to be intertwined in a feedback loop, yet the neural substrate underlying this sensorimotor task in the vertebrate brain remains elusive. Here, we combine virtual-reality behavioural assays, volumetric calcium imaging, optogenetic stimulation and circuit modelling to reveal the neural mechanisms through which a zebrafish performs phototaxis, i.e...
September 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28935806/infants-make-more-attempts-to-achieve-a-goal-when-they-see-adults-persist
#10
Julia A Leonard, Yuna Lee, Laura E Schulz
Persistence, above and beyond IQ, is associated with long-term academic outcomes. To look at the effect of adult models on infants' persistence, we conducted an experiment in which 15-month-olds were assigned to one of three conditions: an Effort condition in which they saw an adult try repeatedly, using various methods, to achieve each of two different goals; a No Effort condition in which the adult achieved the goals effortlessly; or a Baseline condition. Infants were then given a difficult, novel task. Across an initial study and two preregistered experiments (N = 262), infants in the Effort condition made more attempts to achieve the goal than did infants in the other conditions...
September 22, 2017: Science
https://www.readbyqxmd.com/read/28935604/molecular-features-and-physiological-roles-of-k-cl-cotransporter-4-kcc4
#11
REVIEW
A A Marcoux, A P Garneau, R Frenette-Cotton, S Slimani, F Mac-Way, P Isenring
A K(+)-Cl(-) cotransport system was documented for the first time during the mid-seventies in sheep and goat red blood cells. It was then described as a Na(+)-independent and ouabain-insensitive ion carrier that could be stimulated by cell swelling and N-ethylmaleimide (NEM), a thiol-reacting agent. Twenty years later, this system was found to be dispensed by four different isoforms in animal cells. The first one was identified in the expressed sequence tag (EST) database by Gillen et al. based on the assumption that it would be homologous to the Na(+)-dependent K(+)-Cl(-) cotransport system for which the molecular identity had already been uncovered...
September 18, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28935423/a-comparison-between-the-neural-correlates-of-laser-and-electric-pain-stimulation-and-their-modulation-by-expectation
#12
E J Hird, A K P Jones, D Talmi, W El-Deredy
BACKGROUND: Pain is modulated by expectation. Event-related potential (ERP) studies of the influence of expectation on pain typically utilise laser heat stimulation to provide a controllable nociceptive-specific stimulus. Painful electric stimulation has a number of practical advantages, but is less nociceptive-specific. We compared the modulation of electric versus laser-evoked pain by expectation, and their corresponding pain-evoked and anticipatory ERPs. NEW METHOD: We developed understanding of recognised methods of laser and electric stimulation...
September 18, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28934880/three-dimensional-bioprinting-and-its-potential-in-the-field-of-articular-cartilage-regeneration
#13
Vivian H M Mouser, Riccardo Levato, Lawrence J Bonassar, Darryl D D'Lima, Daniel A Grande, Travis J Klein, Daniel B F Saris, Marcy Zenobi-Wong, Debby Gawlitta, Jos Malda
Three-dimensional (3D) bioprinting techniques can be used for the fabrication of personalized, regenerative constructs for tissue repair. The current article provides insight into the potential and opportunities of 3D bioprinting for the fabrication of cartilage regenerative constructs. Although 3D printing is already used in the orthopedic clinic, the shift toward 3D bioprinting has not yet occurred. We believe that this shift will provide an important step forward in the field of cartilage regeneration. Three-dimensional bioprinting techniques allow incorporation of cells and biological cues during the manufacturing process, to generate biologically active implants...
October 2017: Cartilage
https://www.readbyqxmd.com/read/28934559/psychological-perspectives-on-interrogation
#14
Aldert Vrij, Christian A Meissner, Ronald P Fisher, Saul M Kassin, Charles A Morgan, Steven M Kleinman
Proponents of "enhanced interrogation techniques" in the United States have claimed that such methods are necessary for obtaining information from uncooperative terrorism subjects. In the present article, we offer an informed, academic perspective on such claims. Psychological theory and research shows that harsh interrogation methods are ineffective. First, they are likely to increase resistance by the subject rather than facilitate cooperation. Second, the threatening and adversarial nature of harsh interrogation is often inimical to the goal of facilitating the retrieval of information from memory and therefore reduces the likelihood that a subject will provide reports that are extensive, detailed, and accurate...
September 1, 2017: Perspectives on Psychological Science: a Journal of the Association for Psychological Science
https://www.readbyqxmd.com/read/28934526/mechanisms-of-memory-retrieval-in-slow-wave-sleep
#15
Scott A Cairney, Justyna M Sobczak, Shane Lindsay, M Gareth Gaskell
Study Objectives: Memories are strengthened during sleep. The benefits of sleep for memory can be enhanced by re-exposing the sleeping brain to auditory cues; a technique known as targeted memory reactivation (TMR). Prior studies have not assessed the nature of the retrieval mechanisms underpinning TMR: the matching process between auditory stimuli encountered during sleep and previously encoded memories. We carried out two experiments to address this issue. Methods: In Experiment 1, participants associated words with verbal and nonverbal auditory stimuli before an overnight interval in which subsets of these stimuli were replayed in slow-wave sleep...
September 1, 2017: Sleep
https://www.readbyqxmd.com/read/28934302/predicting-couple-therapy-outcomes-based-on-speech-acoustic-features
#16
Md Nasir, Brian Robert Baucom, Panayiotis Georgiou, Shrikanth Narayanan
Automated assessment and prediction of marital outcome in couples therapy is a challenging task but promises to be a potentially useful tool for clinical psychologists. Computational approaches for inferring therapy outcomes using observable behavioral information obtained from conversations between spouses offer objective means for understanding relationship dynamics. In this work, we explore whether the acoustics of the spoken interactions of clinically distressed spouses provide information towards assessment of therapy outcomes...
2017: PloS One
https://www.readbyqxmd.com/read/28934203/development-of-rat-female-genital-cortex-and-control-of-female-puberty-by-sexual-touch
#17
Constanze Lenschow, Johanna Sigl-Glöckner, Michael Brecht
Rat somatosensory cortex contains a large sexually monomorphic genital representation. Genital cortex undergoes an unusual 2-fold expansion during puberty. Here, we investigate genital cortex development and female rat sexual maturation. Ovariectomies and estradiol injections suggested sex hormones cause the pubertal genital cortex expansion but not its maintenance at adult size. Genital cortex expanded by thalamic afferents invading surrounding dysgranular cortex. Genital touch was a dominant factor driving female sexual maturation...
September 2017: PLoS Biology
https://www.readbyqxmd.com/read/28934069/to-defend-or-to-affiliate-the-effects-of-categorical-similarity-cues-after-social-exclusion
#18
Jia-Sin Hong, Chien-Ru Sun
This article proposed that after social exclusion, individuals may react in a hostile or amiable manner, which depends on the type of categorical similarity cues that new groups possess. For excluded individuals, groups that resemble their excluder would provoke a defensive attitude. They also exhibit hospitality to groups that resemble themselves to gain inclusion. In experiment 1, social exclusion was manipulated by providing a scenario story regarding an individual who was excluded and subsequently wanted to join in new groups...
September 21, 2017: Journal of Social Psychology
https://www.readbyqxmd.com/read/28933904/sequential-whole-report-accesses-different-states-in-visual-working-memory
#19
Benjamin Peters, Benjamin Rahm, Stefan Czoschke, Catherine Barnes, Jochen Kaiser, Christoph Bledowski
Working memory (WM) enables a rapid access to a limited number of items that are no longer physically present. WM studies usually involve the encoding and retention of multiple items, while probing a single item only. Hence, little is known about how well multiple items can be reported from WM. Here we asked participants to successively report each of up to 8 encoded Gabor patches from WM. Recall order was externally cued, and stimulus orientations had to be reproduced on a continuous dimension. Participants were able to sequentially report items from WM with an above-chance precision even at high set sizes...
September 21, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/28933897/guessing-versus-misremembering-in-recognition-a-comparison-of-continuous-two-high-threshold-and-low-threshold-models
#20
Jeffrey J Starns, Qiuli Ma
The two-high-threshold (2HT) model of recognition memory assumes that people make memory errors because they fail to retrieve information from memory and make a guess, whereas the continuous unequal-variance (UV) model and the low-threshold (LT) model assume that people make memory errors because they retrieve misleading information from memory. We explored the nature of memory errors by comparing guessing and memory performance. In 2 experiments, participants studied lists of words followed by a test in which each trial was preceded by a cue indicating the probability that the trial would have a studied word...
September 21, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
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