Neurônios espelho são ativados tanto durante a execução de uma ação como durante a observação desta mesma ação desempenhada por outra pessoa. Como parecem integrar observação e ação, os neurônios espelho têm sido foco de estudos sobre como o ser humano entende o próximo e em que extensão é capaz de compartilhar experiências. Esta integração inclui uma \"representação interna\" que envolve as mesmas estruturas nervosas envolvidas na execução da ação observada e tem sido sugerida como parte fundamental da facilitação do aprendizado por imitação. Este trabalho teve como objetivo, além de investigar o papel do sistema de neurônios-espelho no comportamento imitativo, investigar como ações motoras desconhecidas passam a ser reconhecidas e incorporadas ao repertório motor no contexto atual de neurônios espelho. Para isso, 20 voluntários foram treinados a executar acordes musicais em tarefas envolvendo imitação. Nossos resultados mostram que o sistema de neurônios-espelho possui um crítico papel durante a observação de uma ação com o intuito de imitá-la. Além disso, a ativação do sistema de neurônios-espelho pode ser alterada dependendo do contexto em que a ação está inserida / Mirror neurons are activated both during action execution and during observation of this same action performed by another person. As they seem to integrate observation and action, mirror neurons have been the focus of studies on how humans understand the other and to what extent is able to share experiences. This integration includes an \"internal representation\" that involves the same neural structures involved in the execution of an observed action and has been suggested as a fundamental part of the facilitation of learning by imitation. This study aimed, besides investigating the role of the mirror neuron system in imitative behavior, investigating how unknown motor actions are recognized and incorporated into the repertoire after practice in the current context of motor mirror neurons. For this, 20 volunteers were trained to perform tasks involving musical chords in imitation context. Our results show that the mirror neuron system has a critical role during the observation of an action in order to imitate it. Moreover, activation of mirror neuron system may be altered depending on the context in which the action is inserted

1 Abstract Title: EEG analysis of gait on an unstable surface Objectives: The aim of the thesis was comparison of changes of electrical activity of intercerebral brain structures using the programme sLORETA between 1) the state of rest and walk on slackline, 2) the state of rest and walk on groundline and 3) between the state of rest and projection of first-person virtual reality of walking on slackline; to find out which intracerebral areas are activated during these activities. Methods: 10 healthy participants took part in the test, 6 males and 4 females, between 18 and 30 years of age, 24 years of age on average. The experiment consisted of EEG gauging at rest with open/closed eyes (5 minutes each) and three other consequent parts in random order: 1. walk on slackline (2 minutes), 2. walk on groundline imitating walk on slackline (2 minutes), 3. watching a video with the first-person virtual reality projection of walking on slackline in basic position (2 minutes). During the whole experiment the brain activity was monitored and recorded by Wireless EEG Nicolet, EEG hat Waveguard Connect with 19 electrodes was used for collecting data by scalp EEG. The record was consequently assessed by sLORETA programme which created projection of active brain parts in 3D Talairach atlas. Results: Statistically...

This thesis investigates two source memory errors: observation inflation, where observed actions are misremembered as being performed; and self-action inflation in which self-performed actions are misremembered as having been performed by somebody else. It has been proposed that these inflations occur because of overlapping brain activity during observation and performance. This has been attributed to mirror neurone activity. To test this, observation and self-action inflations are investigated for different types of actions (meaningful, meaningless and communicative) known to evoke different mirror neurone activity. Different age groups (young adult, and elderly) were studied as were the effects of relative ethnicity between observer and performer. The Remember-Know-Guess paradigm was used. This showed that people make inflations with high qualitative details and confidence. As anticipated, elderly participants made significantly more observation inflations than young adults. Across both age groups, significantly more inflations occurred for communicative and meaningful actions than for meaningless actions supporting the idea that mirror neurones may be involved in formation of inflations. However when the effects of relative ethnicity were included in the paradigm it was found that significantly more observation inflations were formed after observing different ethnicity actors. It has been hypothesised that if mirror neurone involvement is involved in observation inflations then the highest number of inflations are expected for the same ethnicity condition because of the overlap between participant and performer. This thesis therefore suggests a less simplistic explanation of the underlying mechanisms responsible for these types of memory error.

In both form and content, Wim Wenders's films create a cinema of wandering, tracing a route of intersections between the modern and postmodern visual landscape. The space of the world, its deserted horizons and populated streets, are a kind of visual architecture through which the mobile vision of the film wanders, just as Wenders's peripatetic characters wander through space and time towards encounters with others. This wandering invites a phenomenological understanding of embodied spectator experience and perception, for as much as Wenders's films are about the representative image, they are also about the dynamic relationship of the embodied spectator to the visible world. A first avenue of inquiry leads through the deserts and cities that shape the visual terrain of Wenders's cinema. These locations are always sites (places) and sights (images) of recuperation that offer critique, analysis, and resistance to the hyperreal and the reductive visual practices of postmodernity. A second route follows the journeys of both Wenders's characters and films. The insistence in existential phenomenology that meaning and intentionality inhere in the body's motility provides a starting point for elucidating the relationship of cinematic technology to embodied vision. The film and the spectator share a way of being in the world, and the wandering vision and audition that shape the journeys of Wenders's films are always expressions of the modern experience of space and time. Finally, this dissertation undertakes a third course, applying naturalized phenomenology to a reading of the encounters of Wenders's wandering subjects. This methodology allows for a clearer understanding of the socially mediated subject, and of the relationship of spectator to film. The dynamic mirroring that constitutes cinematic experience as it occurs neurologically and phenomenologically shapes cinematic encounters. Film is a mirror, but more significantly, the spectator is a mirror. For the spectator, as for Wenders's characters, wandering is a way of engaging the contingencies of the other and confronting the truths and lies behind cinematic illusion. / English

The aim of the study: The aim of this work is to find out the possibilities to influence the clinical state of the patients suffering with incomplete spinal cord lesion syndrome with the help of a therapeutic video played through a virtual reality helmet. Methods: The research was conducted with 22 probands (15 males and 7 females) aged between 27 and 76 years (the average age of 55±14 years) from the client of Rehabilitation Centre Kladruby. The probands were divided into two homogenised groups with the same number of members. The control group received a standard rehabilitation programme set by the Rehabilitation Centre. The research group followed the same plan but in addition to this, they were given helmets, and a video with virtual reality was played daily on the total of 30 occasions. The clinical state before conducting the research and after was evaluated using the standard test ASIA impairment scale where the observed transformation was the total of motoric points for the lower limbs. Initial and final examination was conducted by professional and highly trained staff at Kladruby, always doctors. The variance between the initial and the final examination results and the length of stay at the centre were used to set the relative transformation of the clinical state in comparison with the...

Title: Brain activity assessment using sLORETA during modulated and physical activity. Objectives: The aim of this thesis was to compare changes in the electrical activity of cortical and deep brain structures using sLORETA program between the resting state, active movement and passive observation of identical motion performed by the author of this thesis and the same one shown in the video. Methods: In this research participated 12 university students (8 women, 4 men). Age of subjects was between 23 and 25 years. The whole experiment consisted of five parts: 1. electroencephalography in supinated lying position with opened eyes, 2. watching a video, where the selected movement was performed by a woman, 3. watching a video, where this movement was performed by a man, 4. watching the author performing the same movement, 5. performing this movement by subjects themselves. Each of this parts lasted two minutes. The tested movement was 1. diagonal (flexion and extension pattern) of PNF method for right upper extremity. During the whole experiment was registered electric activity of the brain using a scalp EEG. Obtained EEG signal was afterwards exported to sLORETA program, which enabled us to see the collected data in 3D Talairach system and also to make a statistical assessment using a Student's...

The human face has a fascinating capability to express emotions. The facial feedback hypothesis suggests that the human face not only expresses emotions but is also able to send feedback to the brain and modulate the ongoing emotional experience. It has furthermore been suggested that this feedback from the facial muscles could be involved in empathic reactions. This thesis explores the concept of emotional empathy and relates it to two aspects concerning activity in the facial muscles. First, do people high versus low in emotional empathy differ in regard to in what degree they spontaneously mimic emotional facial expressions? Second, is there any difference between people with high as compared to low emotional empathy in respect to how sensitive they are to feedback from their own facial muscles? Regarding the first question, people with high emotional empathy were found to spontaneously mimic pictures of emotional facial expressions while people with low emotional empathy were lacking this mimicking reaction. The answer to the second question is a bit more complicated. People with low emotional empathy were found to rate humorous films as funnier in a manipulated sulky facial expression than in a manipulated happy facial expression, whereas people with high emotional empathy did not react significantly. On the other hand, when the facial manipulations were a smile and a frown, people with low as well as high emotional empathy reacted in line with the facial feedback hypothesis. In conclusion, the experiments in the present thesis indicate that mimicking and feedback from the facial muscles may be involved in emotional contagion and thereby influence emotional empathic reactions. Thus, differences in emotional empathy may in part be accounted for by different degree of mimicking reactions and different emotional effects of feedback from the facial muscles.

<p>Plastic Recognition traces a critical genealogy of the human face in cinema and its afterlives. By rethinking the history of film theory through its various investments in the face, it seeks to intervene not only in the discipline of film studies but more broadly within contemporary political and scientific discourse. This dissertation contends that the face is a privileged site for thinking through the question of recognition, a concept that cuts across a range of aesthetic, political, philosophical, and scientific thought. Plastic Recognition examines this intimate link between the face and recognition through a return to "classical" film theory, and specifically to the first generation of European and Soviet film theorists' preoccupation with the face in silent cinema. In the process, it recasts the canonical debate over cinematic specificity between Béla Balázs and Sergei Eisenstein as an antagonism between two opposing conceptions of the face in film: transparent universalism versus plastic typicality. Of these two conceptions, this project contends that the "Balázsian" idea of a transparently expressive face assumes cultural dominance in the latter half of the 20th century by virtue of its essential commensurability with the political and social ideal of mutual recognition that has come to prevail in the United States and Western Europe in the context of neoliberalism. Alongside and against this dominant tendency, the "Eisensteinian" insistence upon the plasticity of aesthetic form provides a radical alternative to the idealist metaphysics of immediacy underlying both the "Balázsian" notion of the cinematic face and the ideal of mutual recognition it exemplifies. That insistence forces into view the ways that recognition itself is always contingent upon aesthetic and technological practices, even (or especially) when it is brokered by that seemingly most immediate of images--the human face. By adopting this approach as its basic critical orientation, this dissertation attempts to restage the problem of recognition as fundamentally about the historicity of plastic form. The project concludes by turning to a scientific scene of recognition in which the "Balázsian" conception of the face makes an uncanny reappearance. The final chapter examines several studies in contemporary neuroscience that use representations of the human face as experimental stimuli in an effort to establish a neurophysiological basis for the mutual recognition of empathy.</p> / Dissertation

Donat el nivell d'incidència i impacte de l'ictus, hi ha la necessitat de trobar mètodes de rehabilitació més automatitzats que els actuals. Un candidat prometedor és la Realitat Virtual, on múltiples sistemes ja han estat proposats. Malauradament, encara no és coneixen exactament quins són els beneficis d'aquests sistemes en comparació amb mètodes de rehabilitació convencionals. Aquí presentem el raonament, disseny, desenvolupament i resultats en l'impacte clínic d'un d'aquests sistemes, el Rehabilitation Gaming System (RGS). El RGS combina conceptes d'execució i observació d'accions amb una avaluació psicomètrica per proporcionar un entrenament personalitzat i automatitzat al pacient d'ictus. El RGS s'adapta al usuari d'una manera efectiva, i així permet l'aplicació de protocols de rehabilitació personalitzats amb una supervisió mínima. Els nostres resultats mostren que la rehabilitació amb el RGS facilita la recuperació funcional de les extremitats superiors en les fases aguda i crònica de l'ictus, i que per aquest motiu, el RGS és una eina valuosa per a la rehabilitació.Given the high incidence and impact of stroke, the need has arisen to find more automated and self-managed rehabilitation approaches. A promising candidate is the use of Virtual Reality, and a number of systems have been proposed. Thus far, however, it is not clear what the benefits of these systems are when compared to conventional methods. Here we present the rationale, development and results on the clinical impact of one such system, the Rehabilitation Gaming System (RGS). RGS combines concepts of action execution and observation with a psychometric evaluation to provide a personalized and automated training. The RGS effectively adjusts to the individual features of the user, allowing for a minimally supervised deployment of individualized rehabilitation protocols. Our results show that rehabilitation with the RGS facilitates the functional recovery of the upper extremities in the acute and chronic stages of stroke, and that this system is therefore a valuable tool for rehabilitation.

Thesis (Ph. D.)--University of California, San Diego, 2008. / Title from first page of PDF file (viewed September 24, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 133-135).