General anesthesia does not have persistent effects on attention in rodents

Background: Studies in animals have shown that general anesthesia can cause persistent spatial memory impairment, but the influence of anesthetics on other cognitive functions is unclear. This study tested whether exposure to general anesthesia without surgery caused a persistent deficit in attention in rodents.Methods: To evaluate whether anesthesia has persistent effects on attention, rats were randomized to three groups. Group A was exposed for 2 h to isoflurane anesthesia, and tested the following seven days for attentional deficits. Group B was used as a control and received room air before attentional testing. Since there is some evidence that a subanesthetic dose of ketamine can improve cognition and reduce disorders of attention after surgery, rats in group C were exposed to isoflurane anesthesia in combination with a ketamine injection before cognitive assessment. Attention was measured in rats using the 5-Choice Serial Reaction Time Task, for which animals were trained to respond with a nose poke on a touchscreen to a brief, unpredictable visual stimulus in one of five possible grid locations to receive a food reward. Attention was analyzed as % accuracy, % omission, and premature responses.Results: Evaluating acute attention by comparing baseline values with data from the day after intervention did not reveal any differences in attentional measurements. No significant differences were seen in % accuracy, % omission, and premature responses for the three groups tested for 7 consecutive days.Conclusion: These data in healthy rodents suggest that general anesthesia without surgery has no persistent effect on attention and the addition of ketamine does not alter the outcome

Faunal Analysis of the Early Modern Bishop\u27s Farm at Skalholt, Arnessysla Iceland

This dissertation presents the analysis of faunal material recovered from middens outside the main complex of the Bishop of Southern Iceland\u27s Cathedral farm at Skáholt, Arnessysla, Iceland. Issues of diet, deposition patterns, as well as participation in larger trade and intellectual networks addressed. All of these issues are examined in order to investigate larger issues centered around the early modern Atlantic world. The Skáholt material is also compared with the larger body of existing early modern Icelandic archaeofaunal data in order to investigate issues of adaptation and resilience in the face of harsh climatic as well as social and economic conditions

Three Decades in the Cold and Wet: A Career in Northern Archaeology

Thomas H. McGovern has been a pioneering researcher in the North Atlantic region for most of the past 40 years. He has taken his specialty in zooarchaeology beyond counting bones to actually addressing questions about human environment interactions and human response to extreme environmental events. A prolific writer and researcher with a multitude of publications and an impressive funding record, McGovern has always been a proponent of multidisciplinarity and international collaboration. His vision resulted in the creation of the North Atlantic Biocultural Organization (NABO) that currently has more than 400 scientific partners and has been leading projects throughout the Circum Atlantic for over 25 years. The interconnectivity of regions and global events has always been the key to his research, and as of last year, with support from the National Science Foundation Office of Polar Programs, it resulted in the creation of the Global Human Ecodynamics Alliance (GHEA) that is now taking interdisciplinarity and international collaboration to a global perspective

Abraham Lincoln, his spirit lives : an appreciation

This edition is limited to 300 copies. Includes port. of Lincoln engraved by H. Gugler after a painting by J.H. Littlefield. The cover includes a small shadow illustration of Lincoln standing in front of a chair with his name above the chair.https://scholarsjunction.msstate.edu/fvw-pamphlets/2071/thumbnail.jp

Historical Ecology and Longitudinal Research Strategies around Lake Mývatn Iceland

Historical Ecology has proven to be a very influential tool kit for thinking about complex human interactions with changing landscapes, climate, and other humans. It has also provided concrete and practical frameworks for carrying out sustained long- term place-based research projects that break through traditional periodization to look at the dialectical interaction of human economies and local and regional ecosystems through time. The “longitudinal perspective” pioneered by Carole Crumley’s work in Burgundy has proved to be a very effective tool for carrying out sustained multi-year, multi-investigator, and multi- generational investigations in landscapes around the globe. This paper presents an overview of the application of a longitudinal historical ecology research agenda to the Mývatn high altitude lake basin in Northern Iceland and the often-unexpected outcomes resulting from decades long investigation of millennial scale processes in the same research area by expanding teams of researchers that include the local residents

The Caves of Barbuda’s Eastern Coast: Long Term Occupation, Ethnohistory and Ritual

Barbuda is the sister island to Antigua, located in the Lesser Antilles, West Indies. This island belongs to the Miocene arch of the Lesser Antilles, along with Grande Terre of Guadeloupe, Marie Galante, and Anguilla. Barbuda, notwithstanding its small size and low elevation, has an exceptionally rich past. Recent investigations by a Brooklyn College, City University of New York led team, has discovered evidence of human activity in and around these caves from the Archaic Period down to the present day. The range of activity at these caves begins with scatters of Archaic lithics, through artifacts and faunal material possibly produced by Obeah rituals to the contemporary celebrations and feasting activities that take place within and around these caves to this day. These contemporary cave based activities are central to the Barbudan people’s relationship to their land and follow in the footsteps of the many waves of peoples that have called this island home for thousands of years. The idea of living from the land is celebrated many times a year through gatherings at the caves in which the food served has both African and Amerindian origins. Barbudans continue a long-term tradition of cave usage as shelter and feasting places where the food is cooked and shared and the only food consumed is what can be hunted and/or gathered from the wild. This tradition has been kept alive in the face of westernization and the threat of modernization. The caves of Barbuda offer a powerful example of changing human activities in one specific place through a truly longitudinal perspective

Medieval Iceland, Greenland, and the New Human Condition: A case study in integrated environmental humanities

This paper contributes to recent studies exploring the longue durée of human impacts on island landscapes, the impacts of climate and other environmental changes on human communities, and the interaction of human societies and their environments at different spatial and temporal scales. In particular, the paper addresses Iceland during the medieval period (with a secondary, comparative focus on Norse Greenland) and discusses episodes where environmental and climatic changes have appeared to cross key thresholds for agricultural productivity. The paper draws upon international, interdisciplinary research in the North Atlantic region led by the North Atlantic Biocultural Organization (NABO) and the Nordic Network for Interdisciplinary Environmental Studies (NIES) in the Circumpolar Networks program of the Integrated History and Future of People on Earth (IHOPE). By interlinking analyses of historically grounded literature with archaeological studies and environmental science, valuable new perspectives can emerge on how these past societies may have understood and coped with such impacts. As climate and other environmental changes do not operate in isolation, vulnerabilities created by socioeconomic factors also beg consideration. The paper illustrates the benefits of an integrated environmental-studies approach that draws on data, methodologies and analytical tools of environmental humanities, social sciences, and geosciences to better understand long-term human ecodynamics and changing human-landscape-environment interactions through time. One key goal is to apply previously unused data and concerted expertise to illuminate human responses to past changes; a secondary aim is to consider how lessons derived from these cases may be applicable to environmental threats and socioecological risks in the future, especially as understood in light of the New Human Condition, the concept transposed from Hannah Arendt's influential framing of the human condition that is foregrounded in the present special issue. This conception admits human agency's role in altering the conditions for life on earth, in large measure negatively, while acknowledging the potential of this self-same agency, if effectively harnessed and properly directed, to sustain essential planetary conditions through a salutary transformation of human perception, understanding and remedial action. The paper concludes that more long-term historical analyses of cultures and environments need to be undertaken at various scales. Past cases do not offer perfect analogues for the future, but they can contribute to a better understanding of how resilience and vulnerability occur, as well as how they may be compromised or mitigated

International Approaches to Climate Change and Cultural Heritage

Anthropogenic climate change is increasingly threatening cultural heritage; cultural resource managers, communities, and archaeologists are confronting this reality. Yet the phenomenon is happening over such a wide range of physical and sociocultural contexts that it is a problem that is too big for any one organization or discipline to tackle. Therefore the sharing of best practices and examples between the communities dealing with this problem is essential. This article presents examples from communities, cultural resource managers, and archaeologists who are engaging with climate change based threats to cultural heritage. Our presentation of these international activities follows the US National Park Service (NPS) four-pillar approach to climate change threats to cultural heritage, which is that there are four primary components to climate change response: science, mitigation, adaptation, and communication. We discuss this approach and then present a number of cases in which communities or institutions are attempting to manage cultural heritage threatened by climate change through these four pillars. This article restricts itself to examples that are taking place outside of the USA and concludes with some general recommendations for both archaeologists and funding entities

Continuity in the face of a slowly unfolding catastrophe : the persistence of Icelandic settlement despite large-scale soil erosion

The National Science Foundation of America provided financial support for this research through grants 1202692 ‘Comparative Island Ecodynamics in the North Atlantic’, and 1249313 ‘Tephra layers and early warning signals for critical transitions’.Soil erosion in Iceland since people first settled the island about 1,100 years ago has fundamentally changed some 15-30% of the island’s total surface area. This provides a unique case to evaluate the consequences of a slowly unfolding environmental catastrophe that has affected, and is continuing to affect a primary means of subsistence for a whole society. Buffered by the sufferings of regions of Iceland, individual farms and particular social groups, Icelandic society as a whole has endured through subsistence flexibility, social inequalities, and the ability to tap into larger provisioning and economic networks. This demonstrates how an adaptable people can confront challenges through social organisation and by diversifying their impacts ecosystems. In the medium term—multi-century timescales—this can be an effective, if costly, strategy, in terms of both the environment and society. Soil conservation is now a national priority, woodland is returning, and climate warming is opening up more potentials for Icelandic arable agriculture. However, the slow catastrophe of Icelandic soil erosion is still unfolding, with the perspective of the longue durée it is evident that decisions made in the Viking Age and medieval period still resonate, constraining future options for resilience and adaptive flexibility.Postprin

Zooarchaeology of the Scandinavian settlements in Iceland and Greenland: diverging pathways

The Scandinavian Viking Age and Medieval settlements of Iceland and Greenland have been subject to zooarchaeological research for over a century, and have come to represent two classic cases of survival and collapse in the literature of long-term human ecodynamics. The work of the past two decades by multiple projects coordinated through the North Atlantic Biocultural Organization (NABO) cooperative and by collaborating scholars has dramatically increased the available zooarchaeological evidence for economic organization of these two communities, their initial adaptation to different natural and social contexts, and their reaction to Late Medieval economic and climate change. This summary paper provides an overview of ongoing comparative research as well as references for data sets and more detailed discussion of archaeofauna from these two island communities. Keywords: North Atlantic, zooarchaeology, Greenland, Iceland, climate change, human ecodynamic