Neurophysiological evidence for rapid processing of verbal and gestural information in understanding communicative actions

During everyday social interaction, gestures are a fundamental part of human communication. The communicative pragmatic role of hand gestures and their interaction with spoken language has been documented at the earliest stage of language development, in which two types of indexical gestures are most prominent: the pointing gesture for directing attention to objects and the give-me gesture for making requests. Here we study, in adult human participants, the neurophysiological signatures of gestural-linguistic acts of communicating the pragmatic intentions of naming and requesting by simultaneously presenting written words and gestures. Already at ~150 ms, brain responses diverged between naming and request actions expressed by word-gesture combination, whereas the same gestures presented in isolation elicited their earliest neurophysiological dissociations significantly later (at ~210 ms). There was an early enhancement of request-evoked brain activity as compared with naming, which was due to sources in the frontocentral cortex, consistent with access to action knowledge in request understanding. In addition, an enhanced N400-like response indicated late semantic integration of gesture-language interaction. The present study demonstrates that word-gesture combinations used to express communicative pragmatic intentions speed up the brain correlates of comprehension processes – compared with gesture-only understanding – thereby calling into question current serial linguistic models viewing pragmatic function decoding at the end of a language comprehension cascade. Instead, information about the social-interactive role of communicative acts is processed instantaneously

High-latitude dust in the Earth system

Natural dust is often associated with hot, subtropical deserts, but significant dust events have been reported from cold, high latitudes. This review synthesizes current understanding of high-latitude (≥50°N and ≥40°S) dust source geography and dynamics and provides a prospectus for future research on the topic. Although the fundamental processes controlling aeolian dust emissions in high latitudes are essentially the same as in temperate regions, there are additional processes specific to or enhanced in cold regions. These include low temperatures, humidity, strong winds, permafrost and niveo-aeolian processes all of which can affect the efficiency of dust emission and distribution of sediments. Dust deposition at high latitudes can provide nutrients to the marine system, specifically by contributing iron to high-nutrient, low-chlorophyll oceans; it also affects ice albedo and melt rates. There have been no attempts to quantify systematically the expanse, characteristics, or dynamics of high-latitude dust sources. To address this, we identify and compare the main sources and drivers of dust emissions in the Northern (Alaska, Canada, Greenland, and Iceland) and Southern (Antarctica, New Zealand, and Patagonia) Hemispheres. The scarcity of year-round observations and limitations of satellite remote sensing data at high latitudes are discussed. It is estimated that under contemporary conditions high-latitude sources cover >500,000 km2 and contribute at least 80–100 Tg yr−1 of dust to the Earth system (~5% of the global dust budget); both are projected to increase under future climate change scenarios

Physical and cognitive impact following SARS-CoV-2 infection in a large population-based case-control study

© 2023. The Author(s).BACKGROUND: Persistent symptoms are common after SARS-CoV-2 infection but correlation with objective measures is unclear. METHODS: We invited all 3098 adults who tested SARS-CoV-2 positive in Iceland before October 2020 to the deCODE Health Study. We compared multiple symptoms and physical measures between 1706 Icelanders with confirmed prior infection (cases) who participated, and 619 contemporary and 13,779 historical controls. Cases participated in the study 5-18 months after infection. RESULTS: Here we report that 41 of 88 symptoms are associated with prior infection, most significantly disturbed smell and taste, memory disturbance, and dyspnea. Measured objectively, cases had poorer smell and taste results, less grip strength, and poorer memory recall. Differences in grip strength and memory recall were small. No other objective measure associated with prior infection including heart rate, blood pressure, postural orthostatic tachycardia, oxygen saturation, exercise tolerance, hearing, and traditional inflammatory, cardiac, liver, and kidney blood biomarkers. There was no evidence of more anxiety or depression among cases. We estimate the prevalence of long Covid to be 7% at a median of 8 months after infection. CONCLUSIONS: We confirm that diverse symptoms are common months after SARS-CoV-2 infection but find few differences between cases and controls in objective parameters measured. These discrepancies between symptoms and physical measures suggest a more complicated contribution to symptoms related to prior infection than is captured with conventional tests. Traditional clinical assessment is not expected to be particularly informative in relating symptoms to a past SARS-CoV-2 infection.Peer reviewe

The effectiveness of therapeutic conversation intervention for caregivers of adolescents with ADHD: a quasi-experimental design.

Neðst á síðunni er hægt að nálgast greinina í heild sinni með því að smella á hlekkinn View/OpenTo access publisher's full text version of this article click on the hyperlink at the bottom of the pageWHAT IS KNOWN ON THE SUBJECT?: Caregivers of adolescents with ADHD experience major difficulties as care providers and are in need of guidance and support. Adolescents with ADHD may develop oppositional and criminal behaviour. More than 50 % have the symptoms in adulthood, and up to one-fourth with severe emotional or antisocial difficulties. There is a lack of evidence of caregivers' supporting intervention although caregiver groups have been found to contribute to better coping, decreased stress and improvements in ADHD symptoms. WHAT DOES THIS PAPER ADD TO EXISTING KNOWLEDGE?: Primary caregivers of adolescents with ADHD experienced better quality of life after the Therapeutic Conversation Intervention. The intervention contributed to better social functioning among secondary caregivers. WHAT ARE THE IMPLICATIONS FOR PRACTICE?: The content of the Therapeutic Conversation Intervention is significant and highlights the utility of a combination of group and private sessions for caregivers of people with ADHD. The intervention can influence how services for families are organized, such that a Therapeutic Conversation Intervention could be offered on a regular basis.Introduction Caregivers of adolescents with Attention Deficit Hyperactivity Disorder are burdened with tasks and many suffer from distress. Adolescents with ADHD may develop antisocial behaviour and caregiver's group can empower caregiver's supporting role. Aim/Question To evaluate the effectiveness of a Therapeutic Conversation Intervention on caregivers of adolescents with ADHD regarding strengthening the supportive role. Method The study utilized a quasi-experimental design. The participants (n = 60) were caregivers of adolescents (13-17 years old) with ADHD. The intervention consisted in-group and parent sessions. The Calgary Family Model and the Family Illness Beliefs Model were used as theoretical frameworks. Results The study revealed significant differences in the improvement of quality of life; regarding primary caregiver (PC) worry, daily activities, family relationships and collaboration post-intervention, as well emotional functioning at both post-intervention and follow-up. Secondary caregiver (SC) social functioning was significantly improved at follow-up. Discussion The intervention proved to be beneficial to the caregivers and is filling a gap in much needed intervention. Implication for practice The results will expand health care professionals' knowledge of how to increase PC quality of life when supporting their adolescent with ADHD. This treatment information should improve service at health care centres/hospitals where adolescents with ADHD receive care.Birtan at BUGL (Child and Adolescent Psychiatric unit) Landspitali University Hospital Icelandic Nurses Association Ingibjorg R. Magnusdottir's Research Fund Faculty of Nursing at the University of Icelan

Educational and support intervention to help families assist in the recovery of relatives with eating disorders

To access publisher full text version of this article. Please click on the hyperlink in Additional Links fieldThe aim of this study was to develop and test an educational and support nursing intervention in Iceland to help families assist with the recovery of relatives with eating disorders. Studies indicate that if families receive adequate help in the recovery process of a relative with an eating disorder, the prognosis is better. The study is a pre-post design. The intervention was based on the Calgary Family Intervention Model. An educational and support intervention, which lasted for 3 weeks, was provided for 21 family members of individuals with eating disorders. The patients had been diagnosed with anorexia nervosa, bulimia nervosa or an eating disorder not otherwise specified. Participants were divided into three groups. The main findings revealed a significant improvement according to the scales used for measuring understanding in the level of expressed emotion questionnaire and for measuring eating behaviour, concern with weight and food, and denial of the problem in the anorectic behaviour observation scale. The participants' responses to the research questions about their satisfaction with the educational and support intervention were positive. The study indicates that an educational and support intervention can prove beneficial for families and patients with eating disorders

Development and Psychometric Testing of the Iceland-Family Illness Beliefs Questionnaire

To access publisher's full text version of this article click on the hyperlink at the bottom of the pageIllness beliefs affect how individuals and families deal with illness. A valid and reliable instrument has not yet been developed to measure "illness beliefs" in family nursing research and clinical practice. This article describes the purpose, reliability, validity, and the potential clinical and research applications of a new instrument, the Iceland-Family Illness Beliefs Questionnaire (ICE-FIBQ). The ICE-FIBQ is a short, self-report measure of an individual's beliefs about illness. Drawing from an advanced nursing practice model called the Illness Beliefs Model, the instrument was developed to measure illness beliefs about (a) cause of illness, that is, etiology; (b) control of illness on family and control of family on illness; (c) effect of illness on the individual and family; (d) illness suffering; and (e) support received from health care professionals during illness. The instrument was tested on 139 family caregivers of adolescents/youth with an illness or a disorder. Exploratory factor analysis reduced the original questionnaire from eight to seven items with a one-factor solution (Cronbach's α = .780). Confirmatory factor analysis supported the one-factor solution (Cronbach's α = .789). Further research is needed to determine concurrent validity with other illness belief/illness perception scales and if the instrument is sensitive to capture change in illness beliefs following family nursing intervention.Birtan, a fund for children, and adolescents with mental health problems at BUGL (2011; child and adolescent psychiatric unit); The Icelandic Nurse’s Association (2012, 2013); the Landspitali University Hospital (2013); and from the Ingibjorg R. Magnusdottir, Research Fund, Faculty of Nursing at the University of Iceland

Six planes at Birdsville airfield, Queensland, Easter 1966 [transparency] /

Caption from slide mount.; Mould spots. Colour loss right side.; Part of The Reverend Andrew Leslie McKay collection of photographs relating to Inland Australia, 1950-1976.; VH-DOL on one aeroplane, and Silver City Air VH-POB on another.; Also available in an electronic version via the internet at: http://nla.gov.au/nla.pic-vn4181384; Collection donated by Mrs Lyn McKay, widow of Reverend Les McKay, through their daughter Dr. Judith McKay

Man beside whale carcass, Albany Whaling Station, Western Australia, 1963 [transparency] /

Title devised by cataloguer based on acquisition documentation.; Part of collection: Collection of photographs of Whaling Station at Albany, Western Australia,1963.; Inscriptions: "5, 27.8.63, Albany Whaling Station"--In pen on upper mount of slide.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.pic-vn3801204; Donated by Richard Gibbons, 2006

Si precipitation during weathering in different Icelandic Andosols

Basaltic weathering from volcanic islands plays a critical role in the climate feedback loop. Geochemical and climate models require information on the rate of secondary mineral formation. We provide direct evidence for precipitation of amorphous Si in organic rich and acidic Histic Andosols compared to preferential allophane formation in organic poor and less acidic Haplic Andosols. Similar results have been obtained from the pioneering work by Opfergelt et al(1) using Si isotope composition. Additionally, enhanced allophane precipitation in Haplic Andosols, independent of long-term soil property changes, highlight the potential role of land use and management on secondary mineral formation. (C) 2014 The Authors. Published by Elsevier B.V