11 research outputs found

    Dolor crónico y modificaciones de la conciencia corporal

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    This review article addresses the relationship between chronic pain and body awareness. Chronic pain refers to an ensemble of pain conditions whose common characteristic is the fact that peripheral lesions cannot explain the duration and intensity of the pain. The lack of explanation in terms of peripheral damage has led researchers to assume that the central nervous system plays a crucial role in these conditions. In particular, one suggestion about how such central factors might operate is by influencing patients? body awareness. In the first part of this article I present evidence showing a bidirectional relationship between chronic pain and what might be called "exteroceptive" body awareness, as well as the related hypothesis that pain results from a disruption in the mechanisms underlying exteroceptive body awareness. Next, I discuss some issues that this hypothesis fails to explain, and I consider the relationship between chronic pain and the autonomic nervous system. Finally, I relate this latter relationship to the notion of "interoceptive" body awareness, and explore the idea that understanding the mechanisms that relate exteroceptive and interoceptive aspects of body awareness might shed light on the nature and development of chronic pain.Este art√≠culo aborda la relaci√≥n entre el dolor cr√≥nico y la conciencia corporal. El dolor cr√≥nico se refiere a un conjunto de patolog√≠as que se caracterizan por la presencia constante de dolor, cuya intensidad y duraci√≥n no pueden ser explicadas en t√©rminos de lesiones del sistema nervioso perif√©rico. La falta de explicaci√≥n en t√©rminos de da√Īo perif√©rico ha llevado a los investigadores a suponer que el sistema nervioso central desempe√Īa un papel crucial en estos s√≠ndromes. En particular, se ha propuesto que la cronicidad del dolor causada posiblemente por una perturbaci√≥n de los mecanismos involucrados en lo que podr√≠a llamar-se la conciencia corporal 'exteroceptiva'. En la primera parte de este art√≠culo presento estudios que muestran una relaci√≥n bi-direccional entre el dolor cr√≥nico y la conciencia corporal exteroceptiva, as√≠ como la hip√≥tesis que el este dolor resulta de la perturbaci√≥n de los mecanismos subyacentes a este tipo de conciencia corporal. A continuaci√≥n, presento algunos problemas que esta hip√≥tesis no logra explicar, y considero la relaci√≥n entre el dolor cr√≥nico y el sistema nervioso aut√≥nomo. Por √ļltimo, considero esta √ļltima relaci√≥n a la luz de la noci√≥n de conciencia corporal 'interoceptiva', y sugiero que la comprensi√≥n de los mecanismos que relacionan los aspectos exteroceptivos e interoceptivos de la conciencia corporal, podr√≠an contribuir a la comprensi√≥n de la natura-leza y el desarrollo de dolor cr√≥nico

    Discovering the structures of lived experience : towards a micro-phenomenological analysis method

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    International audienceThis paper describes a method for analyzing a corpus of descriptions collected through micro-phenomenological interviews. This analysis aims at identifying the structure of the singular experiences which have been described, and in particular their diachronic structure, while unfolding generic experiential structures through an iterative approach. After summarizing the principles of the micro-phenomenological interview, and then describing the process of preparation of the verbatim, the article presents on the one hand, the principles and conceptual devices of the analysis method and on the other hand several dimensions of the analysis process: the modes of structural unfolding of generic structures, the mutual guidance of the processes of structural and experiential unfolding, the tracking of analysis processes, and finally the validation of analysis results

    La relation entre la douleur et la conscience du corps (une recherche utilisant des méthodes expérimentales et expérentielles)

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    Des √©tudes montrent l existence d une relation bidirectionnelle entre la douleur et diff√©rentes formes de perturbations de la conscience du corps. Ces perturbations ont d√©j√† √©t√© signal√©es dans les syndromes douloureux chroniques comme le syndrome de douleur r√©gionale complexe, la douleur du membre fant√īme et la douleur chronique au bas du dos. D autres √©tudes d√©montrent aussi que les modifications cr√©√©es dans la conscience du corps par l'utilisation de diff√©rents appareils, tels que la bo√ģte √† miroir, les prismes et, plus r√©cemment, la r√©alit√© virtuelle, modulent la perception douloureuse. Cette th√®se a explor√© cette relation en deux parties. Dans la premi√®re, j'ai explor√© l'effet d'une modification du sentiment d appartenance du corps, un des aspects de la conscience du corps, sur la perception de la douleur. Pour ce faire, en utilisant une illusion visio-tactile appel√© l'illusion de la main en caoutchouc , j'ai modifi√© le sentiment d appartenance du corps chez des participants sains. J'ai combin√© le paradigme exp√©rimental classique de cette illusion avec une m√©thode pour induire de la douleur par des stimulations thermiques. La deuxi√®me partie de la th√®se est une √©tude qualitative qui vise √† √©valuer l'impact de la douleur chronique g√©n√©ralis√©e sur l'exp√©rience corporelle de patients atteints de fibromyalgie. Gr√Ęce √† une technique d'entretien appel√© entretien d'explicitation inspir√©e par des approches ph√©nom√©nologiques, j'ai cherch√© √† recueillir des descriptions faites par les patients de leurs perceptions du corps dans des moments de douleur intense. Les r√©sultats de ces deux parties de la th√®se sugg√®rent que la connaissance implicite de la topographie de notre corps (ou sch√©ma corporelle) sous-tend l'aspect ext√©roceptive du sentiment de propri√©t√© du corps ainsi que de l'exp√©rience de la douleur, ouvrant la question de savoir si ces exp√©riences partagent les m√™mes m√©canismes sous-jacentsPARIS-BIUSJ-Biologie recherche (751052107) / SudocSudocFranceF

    Exploring the subjective experience of the "rubber hand" illusion

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    International audienceDespite the fact that the rubber hand illusion (RHI) is an experimental paradigm that has been widely used in the last 14 years to investigate different aspects of the sense of bodily self, very few studies have sought to investigate the subjective nature of the experience that the RHI evokes. The present study investigates the phenomenology of the RHI through a specific elicitation method. More particularly, this study aims at assessing whether the conditions usually used as control in the RHI have an impact in the sense of body ownership and at determining whether there are different stages in the emergence of the illusion. The results indicate that far from being "all or nothing," the illusion induced by the RHI protocol involves nuances in the type of perceptual changes that it creates. These perceptual changes affect not only the participants' perception of the rubber hand but also the perception of their real hand. In addition, perceptual effects may vary greatly between participants and, importantly, they evolve over time

    Body, space, and pain

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    Body, space and pain

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    There is growing interest in understanding how the perception of pain (and touch) is influenced by the way we represent our body and the space surrounding it. Recent views argue that pain can only be understood in a larger framework of body perception and action. This attention is driven by accumulating research in experimental and clinical domains, indicating that pain perception depends largely on cognitive factors and multisensory integration. The interest is also boosted by studies on chronic pain conditions suggesting a tight link between body perception and the maintenance of pain. Many aspects remain yet to be elucidated. We welcomed submissions from researchers in cognitive neuroscience and pain to increase our understanding of the interplay among body, space, pain, touch and movement. We aimed to gather insights from different theoretical frameworks and encouraged investigators using a broad range of methods including (but not limited to) behavioural and neuropsychological approaches, imaging techniques, electrophysiology, psychophysiology and TMS to present their results in this Research Topic. In the attempt to go from bench- to bedside we also strongly encouraged submissions from clinicians and physiotherapist whose contribution may help rising some future key questions. Qualitative and phenomenological approaches were also welcome

    Bilateral Alternating Auditory Stimulations Facilitate Fear Extinction and Retrieval

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    International audienceDisruption of fear conditioning, its extinction and its retrieval are at the core of posttraumatic stress disorder (PTSD). Such deficits, especially fear extinction delay, disappear after alternating bilateral stimulations (BLS) during eye movement desensitization and reprocessing (EMDR) therapy. An animal model of fear recovery, based on auditory cued fear conditioning and extinction learning, recently showed that BLS facilitate fear extinction and fear extinction retrieval. Our goal was to determine if these previous results found in animals can be reproduced in humans. Twenty-two healthy participants took part in a classical fear conditioning, extinction, and extinction recall paradigm. Behavioral responses (fear expectations) as well as psychophysiological measures (skin conductance responses, SCRs) were recorded. The results showed a significant fear expectation decrease during fear extinction with BLS. Additionally, SCR for fear extinction retrieval were significantly lower with BLS. Our results demonstrate the importance of BLS to reduce negative emotions, and provide a successful model to further explore the neural mechanisms underlying the sole BLS effect in the EMDR
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