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Estudo neuroquímico do núcleo pré-mamilar ventral nos animais submissos durante os encontros agonísticos sociais.; Neurochemic study of the premammillary ventralis nucleus on submissive animals during social agonistic encounters.

Gouveia, Flavia Venetucci
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 14/12/2009 PT
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Os comportamentos agonísticos sociais dispostos por animais dominantes e subordinados podem ser notados no paradigma residente intruso. No hipotálamo há o núcleo pré-mamilar ventral (PMv) ligado a um sistema sexualmente dimórfico e relacionado a reprodução e comportamentos agonísticos. A cópula é fundamental para a modulação do comportamento de dominância e aumenta os níveis de CART (Cocaine and Amphetamine Regulated Transcript) no PMv. Animais knockout de Sintase do Óxido Nítrico (NOS) apresentam agressão acentuada. Através da hibridização in situ estudamos a expressão de CART e de NOS nos animais com experiência sexual prévia ao encontro agonístico e sem experiência sexual (naive). No grupo que copulou foi visto aumento na expressão de CART e comportamento diferente do grupo naive visto que buscam a dominância e não apresentam posturas de submissão. Este aumento não foi observado nos níveis de NOS. Sugere-se que a experiência sexual esteja relacionada ao aumento de CART no PMv e possivelmente perda do comportamento subordinado e aumento da busca da dominância.; Aggressive behavior occurs when the interests of one or more individuals conflict. Territory is one of these interests, and the resident intruder paradigm is widely used to observe the expression of social agonistic behaviors. The dominance behavior has been studied under several views and it was shown that it can be raised by the presence of the female...

Towards sociable virtual humans : multimodal recognition of human input and behavior

Eckes, Christian; Biatov, Konstantin; Hülsken, Frank; Köhler, Joachim; Breuer, Pia; Branco, Pedro; Encarnação, Luis Miguel Eggeling da
Fonte: IPI Press Publicador: IPI Press
Tipo: Artigo de Revista Científica
Publicado em //2007 ENG
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One of the biggest obstacles for constructing effective sociable virtual humans lies in the failure of machines to recognize the desires, feelings and intentions of the human user. Virtual humans lack the ability to fully understand and decode the communication signals human users emit when communicating with each other. This article describes our research in overcoming this problem by developing senses for the virtual humans which enables them to hear and understand human speech, localize the human user in front of the display system, recognize hand postures and to recognize the emotional state of the human user by classifying facial expression. We report on the methods needed to perform these tasks in real-time and conclude with an outlook on promising research issues of the future.

Personangens virtuais no tratamento do controlo de ansiedade

Lopes, Eder Wolsen Henriques
Fonte: Universidade de Lisboa Publicador: Universidade de Lisboa
Tipo: Dissertação de Mestrado
Publicado em //2013 POR
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Trabalho de projecto de mestrado em Informática, apresentado à Universidade de Lisboa, através da Faculdade de Ciências, 2013; A ansiedade social é um transtorno comum que se pode revelar muito debilitante e que, quando não é tratada devidamente, pode evoluir para patologias graves como fobias e até mesmo depressão. Atualmente existem dois métodos cientificamente aceites no tratamento da ansiedade social: a utilização de produtos farmacológicos e a terapia cognitivo-comportamental. A terapia cognitivo-comportamental é orientada para uma redução incremental dos sintomas, abordando três aspetos distintos: a gestão dos pensamentos que provocam a ansiedade, a aquisição de competências sociais e a terapia de exposição. Tradicionalmente a terapia de exposição é efetuada in vivo ou in imagino. Porém, a evolução tecnológica, criou a possibilidade de se aplicar a Realidade Virtual à Terapia de Exposição, surgindo assim a Terapia de Exposição, baseada em Realidade Virtual. Neste documento descreve-se uma aplicação de Realidade Virtual desenvolvida com o objetivo de apoiar no tratamento da ansiedade social relacionada com situações de avaliação perante um júri. A aplicação gera uma simulação com humanos virtuais num cenário que recria um júri. O terapeuta dispõe de uma interface gráfica...

Torsion dystonia genes in two populations confined to a small region on chromosome 9q32-34.

Kwiatkowski, D J; Ozelius, L; Kramer, P L; Perman, S; Schuback, D E; Gusella, J F; Fahn, S; Breakefield, X O
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /08/1991 EN
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Idiopathic torsion dystonia (ITD) is characterized by sustained, involuntary muscle contractions, frequently causing twisting and repetitive movements or abnormal postures. Most familial forms of ITD display autosomal dominant inheritance with reduced penetrance. Linkage analysis has been previously used to localize a dystonia gene to the 9q32-34 region in a large non-Jewish family and in a group of Ashkenazi Jewish families. Utilizing GT repeat polymorphisms from this region, here we demonstrate that the gene causing dystonia in Ashkenazi Jews can be localized to the 11-cM interval between AK1 and D9S10. Linkage analysis in the non-Jewish family is also consistent with occurrence of the gene in this region, although positive lod scores extend over a greater than 20-cM interval in that family. These results set the stage for positional cloning of the dystonia gene. Currently there are no known candidate genes in this region.

The DYT1 Gene on 9q34 Is Responsible for Most Cases of Early Limb-Onset Idiopathic Torsion Dystonia in Non-Jews

Kramer, P. L.; Heiman, G. A.; Gasser, T.; Ozelius, L. J.; de Leon, D.; Brin, M. F.; Burke, R. E.; Hewett, J.; Hunt, A. L.; Moskowitz, C.; Nygaard, T. G.; Wilhelmsen, K. C.; Fahn, S.; Breakefield, X. O.; Risch, N. J.; Bressman, S. B.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /09/1994 EN
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Idiopathic torsion dystonia (ITD) is characterized by involuntary twisting movements and postures. A gene for this disorder, DYT1, was mapped to chromosome 9q34 in 12 Ashkenazi Jewish (AJ) families and one large non-Jewish kindred. In the AJ population, strong linkage disequilibrium exists between DYT1 and adjacent markers within a 2-cM region. The associated haplotype occurs in >90% of early limb-onset AJ cases. We examined seven non-Jewish ITD families of northern European and French Canadian descent to determine the extent to which early-onset ITD in non-Jews maps to DYT1. Results are consistent with linkage to the DYT1 region. Affected individuals in these families are clinically similar to the AJ cases; i.e., the site of onset is predominantly in the limbs and at least one individual in each pedigree had onset before age 12 years. None carries the AJ haplotype; therefore, they probably represent different mutations in the DYT1 gene. The two French Canadian families, however, display the same haplotype. Estimates of penetrance in non-Jewish families range from .40 to .75. We identified disease gene carriers and, with adjustments for age at onset, obtained a direct estimate of penetrance of .46. This is consistent with estimates of 30%–40% in the AJ population. Two other non-Jewish families with atypical ITD (later onset and/or cranial or cervical involvement) are not linked to DYT1...

Cerebellothalamocortical pathway abnormalities in torsinA DYT1 knock-in mice

Uluğ, Aziz M.; Vo, An; Argyelan, Miklos; Tanabe, Lauren; Schiffer, Wynne K.; Dewey, Stephen; Dauer, William T.; Eidelberg, David
Fonte: National Academy of Sciences Publicador: National Academy of Sciences
Tipo: Artigo de Revista Científica
EN
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The factors that determine symptom penetrance in inherited disease are poorly understood. Increasingly, magnetic resonance diffusion tensor imaging (DTI) and PET are used to separate alterations in brain structure and function that are linked to disease symptomatology from those linked to gene carrier status. One example is DYT1 dystonia, a dominantly inherited movement disorder characterized by sustained muscle contractions, postures, and/or involuntary movements. This form of dystonia is caused by a 3-bp deletion (i.e., ΔE) in the TOR1A gene that encodes torsinA. Carriers of the DYT1 dystonia mutation, even if clinically nonpenetrant, exhibit abnormalities in cerebellothalamocortical (CbTC) motor pathways. However, observations in human gene carriers may be confounded by variability in genetic background and age. To address this problem, we implemented a unique multimodal imaging strategy in a congenic line of DYT1 mutant mice that contain the ΔE mutation in the endogenous mouse torsinA allele (i.e., DYT1 knock-in). Heterozygous knock-in mice and littermate controls underwent microPET followed by ex vivo high-field DTI and tractographic analysis. Mutant mice, which do not display abnormal movements, exhibited significant CbTC tract changes as well as abnormalities in brainstem regions linking cerebellar and basal ganglia motor circuits highly similar to those identified in human nonmanifesting gene carriers. Moreover...

Stone Throwing as a Sexual Display in Wild Female Bearded Capuchin Monkeys, Sapajus libidinosus

Falótico, Tiago; Ottoni, Eduardo B.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 21/11/2013 EN
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Capuchin monkeys (Sapajus spp.) in captive settings frequently manipulate and throw objects. In the wild, they may push or drop stones and sticks toward targets during inter- or intraspecific threat displays. In addition, female capuchin monkeys exhibit a broad repertoire of behaviors during their proceptive period, including facial expressions, vocalizations, stereotyped body postures, and touch-and-run behavior. This study reports stone throwing as a newly-described communicative behavior during the proceptive display of females in a group of bearded capuchin monkeys (S. libidinosus) in Serra da Capivara National Park, Brazil. During a two-year study, three females from one group were seen throwing stones at males during their proceptive phase. After this period, three other females in the same group exhibited the same behavior. Although it may be possible that this pattern is the result of several independent innovations by each female, the apparent absence of this behavior in other groups leads us to suggest that we have documented the diffusion of a new behavioral trait or tradition within this capuchin social group.

Pain Assessment and Treatment Decisions for Virtual Human Patients

Wandner, Laura D.; George, Steven Z.; Lok, Benjamin C.; Torres, Calia A.; Chuah, Joon Hao; Robinson, Michael E.
Fonte: Mary Ann Liebert, Inc. Publicador: Mary Ann Liebert, Inc.
Tipo: Artigo de Revista Científica
Publicado em 01/12/2013 EN
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Laypeople and healthcare professionals use demographic cues when making pain management decisions. These decisions can negatively affect patient outcomes. This study examined whether laypeople base their pain management decisions in part on pain-related postures and demographic cues. Virtual human (VH) technology was used to research whether sex and race, as well as body posture, influenced pain management decisions. Ninety-seven laypersons examined VH patients exhibiting low back pain related body postures whose demographic cues varied by VH sex and VH race. T tests validated that participants were able to distinguish between high pain related body postures and low pain related body postures. The participants assessed male VH patients to be experiencing more pain than female VH patients. This study suggests that participants use sex as a cue when assessing pain. Participants may perceive VH male patients as experiencing high pain intensity if the participants are willing to counter male stereotypes and acknowledge that the male VH patients display pain behaviors.

Comportamento social e territorialidade alimentar na garça-azul, Egretta caerulea (L) = Feeding territoriality in the little blue heron, Egretta caerulea (L)

Silva, Emmanuel Moralez da
Fonte: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Psicobiologia; Estudos de Comportamento; Psicologia Fisiológica Publicador: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Psicobiologia; Estudos de Comportamento; Psicologia Fisiológica
Tipo: Dissertação Formato: application/pdf
POR
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The use of habitat is an important part of a species biology. One resource of great importance for the survivor and reproduction of an individual is the food resource. Thus, the social interactions an animal has during the feeding activities are of extremely importance within its behavioral aspects, which represents the part of an organism trough which it interacts with the environment, adapting to changes and variations. Herons are known to form feeding aggregations of even more than thousands of individuals, in which social components of foraging have been identified and studied for several species. More profound studies of these aspects are yet to poor for the Little Blue Heron, Egretta caerulea. Therefore, the aim of this study was to describe the social behavior (display postures, vocalizations and co-specific interactions) and the territoriality of the specie during the feeding period in an area of mud bank in the estuarine system of Cananéia, south coast of São Paulo state, Brazil. The defense of a fixed and exclusive area, closest to the mangrove, trough expulsion was observed; some thing that have not yet been registered with concrete data for the specie. Higher capture and success rates, and lower investment rates (steps/min and stabs/min) were registered for individuals foraging in areas corresponding to the defended territory. This could be one of possible reasons for the establishment of territories in the area. Four display postures were registered for the specie...

A moda antes dos shoppings em Goiânia: a butique caseira e o glamour da galeria; Fashion before shoppings in Goiânia: the domestic boutique and the galery s glamour

PRUDENTE, Renata Ferreira dos Santos
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Cultura Visual; Processos e Sistemas Visuais, Educação e Visualidade Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Cultura Visual; Processos e Sistemas Visuais, Educação e Visualidade
Tipo: Dissertação Formato: application/pdf
POR
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The investigation called Fashion before shoppings in Goiânia: the domestic boutique and the galery s glamour aim the location of points of fashion consumption (shops, boutiques and galleries in Goiânia in the 70 s decade, phase that already have no shoppings centers. The study, that rescue a feel of breath air in capital of Goiás in a time of deep transformations, identify forms and spaces of cloth consumption almost forgotten and any anothers tha maybe can be considered seeds for actual models. By portraying an age of human relations more close, we show that, in 70 s decade, suppliers of a clothing with tag inserted in daily life of people, not only like dictators of behavior and tendencies, but also like a kind of bridge for one social transit and a reinvention of everyday. The inquiry prove that this reality of Goiânia in growing up of 70 s decade was too experienced in a similar way at post-capitalist cities and in development, like the Paris of the beginning of century. Both of urbs were invade of breeze of the incessant search of new, that is the fertile ground (ou land) beside urban life, for the establishment of fashion like symbolic good, that comes over the function of cover the body. In Goiânia, such impulse course to the new not culminate in a development of the fashion industry like in others metropolis. However...

The variation of median nerve functionality with wrist postures typical of computer use and a novel ultrasound technique for the diagnosis of carpal tunnel syndrome

Donoghue, Maurice F
Fonte: University of Limerick Publicador: University of Limerick
Tipo: info:eu-repo/semantics/doctoralThesis; all_ul_research; ul_published_reviewed; ul_theses_dissertations
ENG
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peer-reviewed; Carpal tunnel syndrome (CTS) is an affliction that affects numerous people in an occupational and recreational environment. One area commonly linked to the development of this condition is computer use. This is due to the repetitive movements that occur while undertaking this task. However, a direct link between computer use and CTS development has not been established. Determining the cause and development of CTS will result in a greater understanding of the condition and its influence on the patient. This is necessary for adequate treatment and diagnosis of the condition. Knowing the physical responses or anatomical changes that occur will lead to identification of CTS at an earlier stage and a level of severity to be accurately determined. Establishing a connection between CTS and computer use, involves breaking down computer activities into its individual components. One of these components is wrist posture. Deviation of the wrist from a neutral position has been shown to increase pressure within the carpal tunnel, leading to a reduction in nerve functionality. If this pressure is great enough, it will induce the development of CTS. However, investigations into the wrist postures frequented during computer use or the impact of these postures on the median nerve have been limited. During a computer activity wrist movements occur in extension/flexion and a radial/ulnar direction. However...

Antipredator mechanisms of Australian frogs

Williams, C.; Brodie Jr, E.; Tyler, M.; Walker, S.
Fonte: Soc Study Amphibians Reptiles Publicador: Soc Study Amphibians Reptiles
Tipo: Artigo de Revista Científica
Publicado em //2000 EN
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We examined the antipredator mechanisms of 19 Australian hylid species (two genera) and 23 myobatrachid species (nine genera). Frogs of 39 of the 42 species exhibited one or more defensive mechanisms (other than escape), including postures, bright coloration, adhesive skin secretions, and/or calls. Defensive posturing occurred in individuals of 38 species, and varied in relationship to morphology and localization of skin glands. Bright colors, when present, typically were displayed during defensive postures. We documented dramatic geographic variation in the antipredator display of one species, Limnodynates tasmaniensis. Defensive postures were accompanied by secretions from dorsal skin glands. These secretions were sometimes associated with a distinctive odor. Adhesive skin secretions were present in burrowing frogs of three genera. Defensive calls were emitted by most hylids but none of the myobatrachids. We offer a hypothesis of mimicry to explain the behavior pattern of exposing the bold black and white ventral surface in Pseudophryne and Crinia species.; Craig R. Williams, Edmund D. Brodie, Jr., Michael J. Tyler, and Steven J. Walker

On ratings of comfort and exertion by visual display unit users and ratings of workplace layout and working posture by expert egronomists

Hutchinson, T.
Fonte: Elsevier Sci Ltd Publicador: Elsevier Sci Ltd
Tipo: Artigo de Revista Científica
Publicado em //2008 EN
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Data sets comparing ratings of comfort and perceived exertion by visual display unit (VDU) users with ratings of workplace layout and working posture by expert ergonomists were published by Lindega˚ rd et al. [2005. Concordance between VDU-users’ ratings of comfort and perceived exertion with experts’ observations of workplace layout and working postures. Appl. Ergon. 36, 319–325]. The present paper corrects the conclusions that were drawn. Users’ and experts’ ratings were very largely independent of each other. It is also noted that polychoric correlation is often an appropriate statistic for summarising the association in ordered tables of frequencies; http://www.elsevier.com/wps/find/journaldescription.cws_home/30389/description#description; T.P Hutchinson; Copyright © 2007 Elsevier Ltd All rights reserved.

Automated Instantaneous Performance Assessment for Marine-Squad Urban-Terrain Training / 14th ICCRTS: C2 and Agility

Rowe, Neil C.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Conference Paper
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14th International Command and Control Research and Technology Symposium (ICCRTS), June 15-17, 2009, Washington DC.; Proceedings of the 14th International Command and Control Research and Technology Symposium, Washington, DC, June 2009; Urban operations (MOUT) are a key component of U.S. Marine training, yet assessment of performance during the later and more integrative training exercises is difficult because events happen quickly and walls impede full view. We are building a performance assessment system called BASE-IT that will collect data on positions, orientations, postures, and activities of Marines during training using a network of cameras. BASE-IT will automatically summarize performance over exercises and flag problematic behaviors for after-action review by commanders. It will then provide a virtual-reality display showing not only what happened but alternative courses of action using capabilities similar to those of video games. The work reported here focuses on measures of performance assessment for each instant of time ("instantaneous measures"). From reading of Marine documents and discussions with subject-matter experts, we identified 30 potential instantaneous performance measures for a group of Marines, and selected thirteen for implementation: dispersion between Marines...

Hora do recreio! : processos de pertencimentos identitários juvenis nos tempos e espaços escolares

Linck, Rosane Speggiorin
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Dissertação Formato: application/pdf
POR
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16%
O objetivo desta Dissertação é analisar como determinadas práticas culturais, ocorridas no recreio escolar, atuam na produção e no tensionamento de processos de pertencimentos identitários juvenis. Foram observados jovens alunos de turmas de sexta, sétima e de oitava séries em sua rotina escolar no ano letivo de 2007, em uma escola municipal de ensino fundamental do município de São Leopoldo/RS. Foram consideradas suas diferentes maneiras de estar no recreio escolar, sejam através das múltiplas, simultâneas e às vezes descartáveis formas de sociabilidade, ou mesmo do fortalecimento de amizades. Os caminhos teórico-metodológicos para o estudo partiram de referenciais teóricos inscritos no campo dos Estudos Culturais e na etnografia pós-moderna, tendo nos diários de campo, na transcrição das conversas realizadas, bem como nos registros fotográficos, a base para a construção dos dados. Observou-se que, durante o momento do recreio escolar, esses jovens percorriam diferentes espaços da escola destinados a tal prática, transbordando conversas, respingando inconstâncias, contornando obstáculos, inundando espaços, compondo temporariamente lugares, como se fossem vitrinas dinâmicas que se dissolviam ao término do período destinado para se recrear. Os jovens observados constituíam grupos...

Product conceptualization through a 3D natural interface considering in real-time spatial and ergonomic restrictions

Arroyave Tob??n, Santiago
Fonte: Universidad EAFIT; Maestr??a en Ingenier??a; Escuela de Ingenier??a Publicador: Universidad EAFIT; Maestr??a en Ingenier??a; Escuela de Ingenier??a
Tipo: masterThesis; Tesis de Maestr??a; acceptedVersion
SPA
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Currently, the conceptualization of products whose shape and configuration depends on the context is a highly time-consuming process since it has to be achieved asynchronously between the real environment of the product???s usage and the design office -- In general, the designer manually maps the context in order to create a 3D model of it and then to start the product design process -- The literature presents some proposals to digitalize the context without the need of a manual mapping -- However, these approaches are mainly computer-centric tools where the designer is desk-bound and (s)he does not have a clear spatial perception since the interactions with the 3D models are usually based on 2D interfaces -- On this research we aimed to prove that conceptualization of context-dependent products directly over its real environment through gesture-based modeling tools, allows the designer to consider spatial and ergonomic restrictions that the context imposes to the product, through the real-time analysis of the interaction user-context -- In order to prove that, we developed a tool called ??ir-Modeling, in which the designer is able to create virtual conceptual products quickly and efficiently, taking advantage of hand gestures meanwhile (s)he is interacting directly with the real scenario in an Augmented Reality (AR) environment -- Air-Modeling also allows a continuous evaluation of the user postures involved in the product usage and assembly in order to analyze ergonomic risks...

The Middle Miocene Ape Pierolapithecus catalaunicus Exhibits Extant Great Ape-Like Morphometric Affinities on Its Patella: Inferences on Knee Function and Evolution

Pina, Marta; Almécija, Sergio; Alba, David M.; O'Neill, Matthew C.; Moyà-Solà, Salvador
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 17/03/2014 EN
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The mosaic nature of the Miocene ape postcranium hinders the reconstruction of the positional behavior and locomotion of these taxa based on isolated elements only. The fossil great ape Pierolapithecus catalaunicus (IPS 21350 skeleton; 11.9 Ma) exhibits a relatively wide and shallow thorax with moderate hand length and phalangeal curvature, dorsally-oriented metacarpophalangeal joints, and loss of ulnocarpal articulation. This evidence reveals enhanced orthograde postures without modern ape-like below-branch suspensory adaptations. Therefore, it has been proposed that natural selection enhanced vertical climbing (and not suspension per se) in Pierolapithecus catalaunicus. Although limb long bones are not available for this species, its patella (IPS 21350.37) can potentially provide insights into its knee function and thus on the complexity of its total morphological pattern. Here we provide a detailed description and morphometric analyses of IPS 21350.37, which are based on four external dimensions intended to capture the overall patellar shape. Our results reveal that the patella of Pierolapithecus is similar to that of extant great apes: proximodistally short, mediolaterally broad and anteroposteriorly thin. Previous biomechanical studies of the anthropoid knee based on the same measurements proposed that the modern great ape patella reflects a mobile knee joint while the long...

Animal Violence Demystified

Natarajan, Deepa; Caramaschi, Doretta
Fonte: Frontiers Research Foundation Publicador: Frontiers Research Foundation
Tipo: Artigo de Revista Científica
Publicado em 05/04/2010 EN
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Violence has been observed in humans and animals alike, indicating its evolutionary/biological significance. However, violence in animals has often been confounded with functional forms of aggressive behavior. Currently, violence in animals is identified primarily as either a quantitative behavior (an escalated, pathological and abnormal form of aggression characterized primarily by short attack latencies, and prolonged and frequent harm-oriented conflict behaviors) or a qualitative one (characterized by attack bites aimed at vulnerable parts of the opponent's body and context independent attacks regardless of the environment or the sex and type of the opponent). Identification of an operational definition for violence thus not only helps in understanding its potential differences from adaptive forms of aggression but also in the selection of appropriate animal models for both. We address this issue theoretically by drawing parallels from research on aggression and appeasement in humans and other animals. We also provide empirical evidences for violence in mice selected for high aggression by comparing our findings with other currently available potentially violent rodent models. The following violence-specific features namely (1) Display of low levels of pre-escalatory/ritualistic behaviors. (2) Immediate and escalated offense durations with low withdrawal rates despite the opponent's submissive supine and crouching/defeat postures. (3) Context independent indiscriminate attacks aimed at familiar/unfamiliar females...

A wireless lingual feedback device to reduce overpressures in seated posture: a feasibility study

Chenu, Olivier; Vuillerme, Nicolas; Demongeot, Jacques; Payan, Yohan
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 19/11/2009
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BACKGROUND: Pressure sores are localized injuries to the skin and underlying tissues and are mainly resulting from overpressure. Paraplegic peoples are particularly subjects to pressure sores because of long-time seated postures and sensory deprivation at the lower limbs. METHODOLOGY/PRINCIPAL FINDINGS: Here we report outcomes of a feasibility trial involving a biofeedback system aimed at reducing buttock overpressure whilst an individual is seated. The system consists of (1) pressure sensors, (2) a laptop coupling sensors and actuator (3) a wireless Tongue Display Unit (TDU) consisting of a circuit embedded in a dental retainer with electrodes put in contact with the tongue. The principle consists in (1) detecting overpressures in people who are seated over long periods of time, (2) estimating a postural change that could reduce these overpressures and (3) communicating this change through directional information transmitted by the TDU. Twenty-four healthy subjects voluntarily participated in this study. CONCLUSIONS/SIGNIFICANCE: The findings suggest that, in this trial, subjects were able to use a tongue tactile feedback system to reduce buttock overpressure while seated. Further evaluation of this system on paraplegic subjects remains to be done.

Actividad electromiográfica y co-contracción de los músculos del tronco durante ejercicios con barra oscilante: análisis del efecto de diferentes posturas; Atividade eletromiográfica e cocontração dos músculos do tronco durante exercícios realizados com haste oscilatória: uma análise do efeito de diferentes posturas; Electromyographic activity and cocontraction of trunk muscles during exercises performed with an oscillatory pole: an analysis of the effect of different postures

Martins, Luis Renato Garcia Martinez; Marques, Nise Ribeiro; Ruzene, Juliana Rodrigues Soares; Morita, Ângela Kazue; Navega, Marcelo Tavella
Fonte: Universidade de São Paulo. Faculdade de Medicina Publicador: Universidade de São Paulo. Faculdade de Medicina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf; application/pdf
Publicado em 01/06/2015 POR; ENG
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Este estudio tuvo por objetivo analizar la actividad electromiográfica (EMG) y la co-contracción de los músculos del tronco durante el ejercicio con barra oscilante en dos posturas distintas, la pelvis neutral y la en retroversión. Participaron veinte mujeres entre los 18 hasta los 28 años de edad, sin dolor lumbar, reclutadas en una universidad. La recolección de datos se realizó por un ejercicio con barra oscilante, que colocada verticalmente al suelo, podría ser agarrada por ambas manos de las participantes y, así, oscilar en el plan sagital. Las señales EMG se recogieron de forma bilateral en los músculos oblicuo interno (OI), recto abdominal (RA), iliocostal lumbar (IL) y multifidus (MU). El análisis de la varianza (ANOVA) de las medidas repetidas mostró interacción entre músculos y posturas (F=5,18, p=0,003), siendo que la activación del músculo IL en la postura neutral fue un 7,93% mayor que en la postura en retroversión (p=0,055) y la activación del músculo OI fue un 13,62% mayor en la postura en retroversión que durante el ejercicio en la postural neutral (p=0,002). Con respecto a los resultados, el ejercicio realizado con la postura en retroversión de la pelvis aumentó la activación del músculo OI...