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1.
BMC Med Educ ; 24(1): 763, 2024 Jul 16.
Artigo em Inglês | MEDLINE | ID: mdl-39014394

RESUMO

BACKGROUND: Given the changes in the current learning environment health professionals are facing major challenges to keep up with current and updated information with the rapidly growing clinical and scientific knowledge base. Being able to identify relevant, high-quality articles, adapt or adopt to new learning strategies with an already intense workload are just a few of the main challenges. Self-directed learning is a key skill of competent health professionals and describes the process by which individuals evaluate their learning needs, goals and the resources needed for learning, however the emerging problems for professionals practicing SDL are manifold. DESIGN: A qualitative, exploratory approach based on four research questions was used to understand how skilled neurosurgeons maintain and update their professional knowledge. Twenty-six neurosurgeons within the University Hospital of Bern completed a semi-structured interview. RESULTS: One of the main findings concerns the differences between neurosurgeons regarding the SDL strategies they employ, which is compounded by their level of experience. All participants recognized that new or alternative learning approaches are necessary to manage the learning landscape, and for many this concerned their use of learning digital tools. Many, however, were unsure how to change their current behavior. CONCLUSION: The results highlight that positive factors influencing SDL in the workplace include learning leadership and support in identifying new or alternative strategies, an internal culture committed to learning as well as digital learning tools and networks. All are vital in managing the continuously evolving learning environment.


Assuntos
Neurocirurgiões , Pesquisa Qualitativa , Humanos , Neurocirurgiões/educação , Competência Clínica , Masculino , Feminino , Autoaprendizagem como Assunto , Adulto , Pessoa de Meia-Idade
2.
Palliat Support Care ; : 1-10, 2023 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-37927127

RESUMO

OBJECTIVES: Although caring for dying patients and their family caregivers (FC) is integral to patient care, training in communication about approaching death is almost inexistent in medical and nursing curricula. Consequently, many health professionals have insufficient knowledge about conducting these conversations. In order to gain a broader insight into essential aspects of this communication from different perspectives, we conducted focus groups with key stakeholders. METHODS: Medical specialists, nurses, medical students, bereaved FC and patient representatives participated in five focus groups (n = 30). Following a focus group schedule, we elicited relevant aspects of communication about approaching death, associated emotions, and appropriate communication frameworks. We analyzed data thematically. RESULTS: Four main themes were central to conversations about approaching death: (1) embracing care within medical expertise, (2) preparing the conversation while remaining open to the unexpected, (3) recognizing and reflecting on own emotions and reactions, and (4) establishing a meaningful connection with others. SIGNIFICANCE OF RESULTS: Communicating about approaching death with dying patients and their FC can be complex and challenging at a professional and personal level. With the recognition of the dying phase, a process is initiated for which health professionals need solid clinical knowledge about but also effective communication skills, constant self-reflection and self-care strategies. Comprehensive training and supervision while dealing with the challenges of communicating approaching death to dying patients and their FC are key, particularly for trainees, less experienced physicians and nurses. The essential components identified in this study can help health professionals to master these conversations.

3.
BMC Med Educ ; 22(1): 556, 2022 Jul 19.
Artigo em Inglês | MEDLINE | ID: mdl-35850770

RESUMO

BACKGROUND: Precision Medicine offers tailored prevention, diagnosis, treatment and management to patients that considers genomics, lifestyle and environmental factors. If implementation of Precision Medicine is to advance, effective, focused upskilling of frontline healthcare professionals through quality continuing professional development is needed. This study reports on an evidence-based approach to needs assessment to investigate the current level of knowledge of Precision Medicine, acceptable content for training, the perceived potential of a more precision approach to patient care and motivation to participate in a training programme among pharmacists, advanced practice nurses and general practitioners. Investigating perceived needs can avoid a top-down approach and support a design that is fit for purpose to targeted professions. METHODS: This study reports on 2 focus groups (n = 12) delivered in French and German with equal professional participation of the targeted professions. The research objectives were investigated in two phases. During the first phase, a literature review and expert consultations were conducted to develop a definition of PM, patient cases and content for training. In a second phase, these investigations were further explored using focus groups to investigate acceptable learning objectives, the potential of PM to relevant professions and motivation of participants. Quantitative investigations using rating scales and visual analogues were incorporated. The focus groups were audio recorded, transcribed by intelligent verbatim and translated to English. NVivo was used for data analysis and interpretation following a hybrid approach using the Framework Method and thematic analysis. The analytical framework, Implementation Science, was applied to organise and present research data. RESULTS: Precision Medicine is considered a new topic area, largely unfamiliar to frontline healthcare professionals.. There was acceptance of a more precision approach to care among all participants with perceived positive implications for patients. Valuable insight was gathered on acceptable content and form for training. All participants expressed concerns on readiness within their professions which included an insufficient system infrastructure, a lack of time to attend needed training, a lack of clarity for use in practice and the time needed to build a support network. CONCLUSIONS: A precision approach to patient care is on the horizon for health care professionals not only in hospital settings but also at the community level. Our results conclude that an adaptable and flexible training programme in PM is timely, contextually relevant and conducive to the needs of targeted health professions for successful implementation. A training programme in PM will require support across sectors and stakeholders, supporting insurance models, educated patients and integrated care supported by innovative technology. Implementation Science outcomes are a useful strategy towards design of an effective training programme that can have measurable impact in practice.


Assuntos
Pessoal de Saúde , Medicina de Precisão , Grupos Focais , Pessoal de Saúde/educação , Humanos , Aprendizagem , Avaliação das Necessidades
4.
Swiss Med Wkly ; 154: 3436, 2024 Jul 24.
Artigo em Inglês | MEDLINE | ID: mdl-39137379

RESUMO

AIMS OF THE STUDY: This research aimed to investigate the self-directed learning (SDL) habits of Swiss general practitioners from the German-speaking part of Switzerland, understanding how they acquire new knowledge, exploring the impact of the COVID-19 pandemic on these habits and identifying optimisation strategies for their future self-directed learning. METHODS: We employed a qualitative study design, conducting semi-structured interviews with 16 general practitioners from 30 May 2022 to 06 July 2022. Thematic analysis based on a mixed deductive/inductive approach was used to gain insight into the learning activities and self-directed learning practices of the practitioners. RESULTS: The interviewed general practitioners demonstrated a versatile approach to self-directed learning, where peer communication emerged as the most predominant learning method. It is noteworthy that the younger generation in particular showed a strong inclination for peer learning and is well prepared for the integration of advanced digital solutions for peer communication. Furthermore, a significant shift was observed in media-based self-directed learning, especially since the COVID-19 pandemic. Digital platforms and repositories for practical learning were mentioned as educational mainstays by many interviewees, reflecting a profound technological shift observed over the past 25 years and especially since the pandemic. The primary motivation for pursuing new knowledge remains patient care, although personal development and staying up-to-date with medical and technological advancements are also key motivators. Although the pandemic has undeniably accelerated the transition towards digital learning, it has also brought with it challenges such as information overload and technical difficulties. There was an evident decline in formal learning venues and physical presence during the pandemic, yet the reported value of in-person interactions remains high. Suggestions for optimising self-directed learning included enhancing digital offerings, fostering stronger peer networks and integrating more practical content. CONCLUSIONS: The COVID-19 pandemic has catalysed a transformation in the self-directed learning practices of general practitioners in the German-speaking part of Switzerland, underlining the importance of a balanced approach between digital and traditional learning methods. As the digital realm of self-directed learning grows, it is essential to address existing challenges and capitalise on potential advantages. Both individual networking efforts like general practitioner quality circles and initiatives from official authorities like informal self-test opportunities can play pivotal roles in refining self-directed learning practices. The findings from this study offer valuable insights for enhancing learning resources and environments that align with general practitioners' needs and preferences. Future research should investigate the ongoing impact of advanced digital technologies on self-directed learning to understand the evolving landscape in a post-pandemic world.


Assuntos
COVID-19 , Clínicos Gerais , Pandemias , Pesquisa Qualitativa , SARS-CoV-2 , Humanos , Suíça , COVID-19/epidemiologia , Clínicos Gerais/psicologia , Masculino , Feminino , Adulto , Entrevistas como Assunto , Autoaprendizagem como Assunto , Pessoa de Meia-Idade , Betacoronavirus , Infecções por Coronavirus/epidemiologia , Pneumonia Viral/epidemiologia
5.
PEC Innov ; 5: 100309, 2024 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-39027227

RESUMO

Objective: To help healthcare professionals (HCP) act with more confidence when communicating about approaching death, we sought to develop a communication model for HCP to facilitate conversations with dying patients and family caregivers (FC) in nonemergency situations. Methods: We used a four-phase integrative approach: (1) creation of a preliminary model based on a systematic literature review and expert knowledge, (2) review of the model draft by international palliative care experts, (3) review by key stakeholders, and (4) final appraisal by communication experts. Results: After the clinical recognition of dying, the communication model provides a structure and practical communication aids for navigating the conversation based on three phases. It describes the content and relational level as core dimensions of effective conversations about approaching death and highlights the importance of HCP self-awareness and self-care when caring for the dying. Conclusion: Based on systematic involvement of key stakeholders, the model supports clinicians navigating challenging conversations about approaching death with dying patients and their FC successfully and with more confidence. Innovation: This study expands the theoretical basis for communication about approaching death and offers a pragmatic model for educational interventions and clinical use.

6.
Sci Data ; 10(1): 612, 2023 09 11.
Artigo em Inglês | MEDLINE | ID: mdl-37696807

RESUMO

EuroCrops contains geo-referenced polygons of agricultural croplands from 16 countries of the European Union (EU) as well as information on the respective crop species grown there. These semantic annotations are derived from self-declarations by farmers receiving subsidies under the common agricultural policy (CAP) of the European Commission (EC). Over the last 1.5 years, the individual national crop datasets have been manually collected, the crop classes have been translated into the English language and transferred into the newly developed hierarchical crop and agriculture taxonomy (HCAT). EuroCrops is publicly available under continuous improvement through an active user community.

7.
BMC Psychol ; 11(1): 153, 2023 May 10.
Artigo em Inglês | MEDLINE | ID: mdl-37165406

RESUMO

BACKGROUND: Breaking bad news (BBN; e.g., delivering a cancer diagnosis) is perceived as one of the most demanding communication tasks in the medical field and associated with high levels of stress. Physicians' increased stress in BBN encounters can negatively impact their communication performance, and in the long term, patient-related health outcomes. Although a growing body of literature acknowledges the stressful nature of BBN, little has been done to address this issue. Therefore, there is a need for appropriate tools to help physicians cope with their stress response, so that they can perform BBN at their best. In the present study, we implement the biopsychosocial model of challenge and threat as theoretical framework. According to this model, the balance between perceived situational demands and perceived coping resources determines whether a stressful performance situation, such as BBN, is experienced as challenge (resources > demands) or threat (resources < demands). Using two interventions, we aim to support medical students in shifting towards challenge-oriented stress responses and improved communication performance: (1) stress arousal reappraisal (SAR), which guides individuals to reinterpret their stress arousal as an adaptive and beneficial response for task performance; (2) worked examples (WE), which demonstrate how to BBN in a step-by-step manner, offering structure and promoting skill acquisition. METHODS: In a randomized controlled trial with a 2 (SAR vs. control) x 2 (WE vs. control) between-subjects design, we will determine the effects of both interventions on stress response and BBN skills performance in N = 200 third-year medical students during a simulated BBN encounter. To identify students' stress responses, we will assess their perceived coping resources and task demands, record their cardiovascular activity, and measure salivary parameters before, during, and after BBN encounters. Three trained raters will independently score students' BBN skills performances. DISCUSSION: Findings will provide unique insights into the psychophysiology of medical students who are tasked with BBN. Parameters can be understood more comprehensively from the challenge and threat perspective and linked to performance outcomes. If proven effective, the evaluated interventions could be incorporated into the curriculum of medical students and facilitate BBN skills acquisition. TRIAL REGISTRATION: ClinicalTrials.gov (NCT05037318), September 8, 2021.


Assuntos
Médicos , Estudantes de Medicina , Humanos , Revelação da Verdade , Estudantes de Medicina/psicologia , Médicos/psicologia , Comunicação , Nível de Alerta , Ensaios Clínicos Controlados Aleatórios como Assunto
8.
GMS J Med Educ ; 39(2): Doc24, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35692359

RESUMO

Background: Only a few studies with small sample sizes have compared electronic Objective Structured Clinical Examination (OSCE) rating checklists with traditional paper-based OSCE rating checklists. In this study, the examiner-perceived usability and preference for type of OSCE checklist (electronic vs. paper based) were compared, and the influence of OSCE checklist type on missed ratings was determined, for the Swiss Federal Licensing Examination in clinical skills for human medicine. Methods: All examiners in the Swiss Federal Licensing Examination in clinical skills for human medicine were invited over two subsequent years to evaluate the OSCE checklist type they had worked with during the examination. This was based on a questionnaire with 14 closed questions (i.e., demographic, checklist-type experience, perceived usability, checklist type preference). Furthermore, the numbers of missed ratings for the paper-based checklist were recorded. Results: The data from these examiners (n=377) with experience of both OSCE checklist types were analyzed. The electronic OSCE checklist was rated significantly higher on all usability aspects (i.e., ease of use, candidate rating and error correction, clarity, distraction using the checklist, overall satisfaction), except for the speed of registering comments (no significant difference). The majority of the examiners in both years (2014: 54.5%, n=60, 2015: 89.8%, n=230) reported preference for working with the electronic OSCE checklist in the future. Missed ratings were seen for 14.2% of the paper-based OSCE checklists, which were prevented with the electronic OSCE checklists. Conclusions: Electronic OSCE checklists were rated significantly more user-friendly and were preferred over paper-based OSCE checklists by a broad national sample of examiners, supporting previous results from faculty-level examinations. Furthermore, missed ratings were prevented with the electronic OSCE checklists. Overall, the use of electronic OSCE checklists is therefore advisable.


Assuntos
Lista de Checagem , Exame Físico , Competência Clínica , Eletrônica , Humanos , Suíça
9.
Swiss Med Wkly ; 150: w20382, 2020 Nov 30.
Artigo em Inglês | MEDLINE | ID: mdl-33306811

RESUMO

Medical education has a long tradition of using various patient representations in teaching and assessment. With this literature review we aim, first, to provide an overview of the most important patient representations used to teach and assess clinical skills, considering in particular “summative exams” that have a pass or fail outcome; second, to provide arguments for choosing certain patient representations; and third, to show the advantages and limitations of different patient representations, especially simulated patients (SPs) and real patients (RPs). Typical patient representations include case narratives, anatomical models, simulators and mannequins, as well as SPs and RPs. The literature indicates that there are multiple ways of using various patient representations in teaching and that the intended didactical purpose informs the choice of representation. Early in the educational programme, even low-fidelity patient representations can be a good fit for assessment purposes if chosen to match the educational level. The use of RPs in summative, high-stakes assessments (exams with particularly important consequences for the examinee) is limited for methodological and ethical reasons. The methodological implementation of summative exams also entails specific challenges, such as ensuring measurement reliability and fairness towards the examinees. Carefully prepared, SPs can perform their roles with a sufficient degree of authenticity, making summative exams more manageable, and imposing no strain or risk on RPs. The ongoing debate concerning the use of SPs and RPs in summative assessment highlights perceived limitations of SPs in relation to RPs that are often not supported by research. Evidence shows that SPs, in combination with additional simulation modalities as needed, represent the first choice for summative clinical assessment. We also consider the strengths and limitations of this review and reflect on the applicability of our findings. We conclude that in order to select the right patient representations in clinical teaching and/or assessment, a number of perspectives must be considered: (i) the learning goals, aligned with the stage of study, (ii) the corresponding requirements of the clinical task itself (e.g., performing a phlebotomy or a communication task), (iii) the level of authenticity required and (iv) the resources needed, taking patient safety and feasibility into consideration.


Assuntos
Educação Médica , Competência Clínica , Comunicação , Avaliação Educacional , Humanos , Aprendizagem , Reprodutibilidade dos Testes
10.
Patient Educ Couns ; 103(9): 1850-1855, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32303364

RESUMO

OBJECTIVES: Video-based worked examples enable medical students to successfully prepare for breaking-bad-news (BBN) encounters with simulated patients (SPs). This is especially true when examples include hints that signal important content. This paper investigates whether the beneficial effect of hints only applies to video-based worked examples or also text-based examples. METHODS: One-hundred-and-forty-seven fourth-year medical students attending a BBN training participated in either of two equally scaffolded, randomised field trials. Prior to encountering SPs, the students worked through an e-learning module introducing the SPIKES protocol for delivering bad news; it contained the same worked example presented to either of four groups as text or video, with or without additional hints denoting the SPIKES steps being implemented. RESULTS: Only a main effect of 'hints' was revealed, implying that students in the hints groups delivered the news to an SP significantly more appropriately than those in the without-hints groups. CONCLUSIONS: Independent of their presentation format, worked examples with hints best foster students' BBN skills learning. PRACTICE IMPLICATIONS: In addition to video, text-based worked examples can effectively prepare students for BBN simulations if hints are included. This offers an affordable alternative to video examples, as text examples can be generated with less effort.


Assuntos
Competência Clínica/normas , Comunicação , Educação de Graduação em Medicina/métodos , Simulação de Paciente , Estudantes de Medicina/psicologia , Revelação da Verdade , Adulto , Avaliação Educacional , Feminino , Humanos , Aprendizagem , Masculino , Relações Médico-Paciente , Médicos , Competência Profissional , Estudantes de Medicina/estatística & dados numéricos , Inquéritos e Questionários , Gravação em Vídeo
11.
Int J Med Educ ; 9: 293-301, 2018 Nov 19.
Artigo em Inglês | MEDLINE | ID: mdl-30457974

RESUMO

OBJECTIVES: The present study aimed to examine whether medical students benefit from an open-book online formative assessment as a preparation for a practical course. METHODS: A between-subjects experimental design was used: participants - a whole cohort of second-year medical students (N=232) - were randomly assigned to either a formative assessment that covered the topic of a subsequent practical course (treatment condition) or a formative assessment that did not cover the topic of the subsequent course (control condition). Course-script-knowledge, as well as additional in-depth-knowledge, was assessed. RESULTS: Students in the treatment condition had better course-script knowledge, both at the beginning, t(212) = 4.96, p < .01, d = 0.72., and in the end of the practical course , t(208) = 4.80, p < .01, d = 0.68. Analyses of covariance show that this effect is stronger for those students who understood the feedback that was presented within the formative assessment, F(1, 213)=10.17, p<.01. Additionally, the gain of in-depth-knowledge was significantly higher for students in the treatment condition compared to students in the control condition, t(208) = 3.68., p < .05, d = 0.72 (0.51). CONCLUSIONS: Students benefit from a formative assessment that is related to and takes place before a subsequent practical course. They have a better understanding of the topic and gain more in-depth-knowledge that goes beyond the content of the script. Moreover, the study points out the importance of feedback pages in formative assessments.


Assuntos
Instrução por Computador , Educação de Graduação em Medicina/métodos , Aprendizagem , Estudantes de Medicina , Avaliação Educacional , Retroalimentação , Feminino , Humanos , Internet , Masculino , Adulto Jovem
13.
Patient Educ Couns ; 101(8): 1439-1451, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-29501215

RESUMO

OBJECTIVES: Effective instructional approaches are needed to enable undergraduates to optimally prepare for the limited training time they receive with simulated patients (SPs). This study examines the learning effects of different presentation formats of a worked example on student SP communication. METHODS: Sixty-seven fourth-year medical students attending a mandatory communication course participated in this randomized field trial. Prior to the course, they worked through an e-learning module that introduced the SPIKES protocol for delivering bad news to patients. In this module, a single worked example was presented to one group of students in a text version, to a second group in a video version, and to a third group in a video version enriched with text hints denoting the SPIKES steps. RESULTS: The video-with-hints group broke bad news to SPs significantly more appropriately than either of the other groups. Although no further condition-related effects were revealed, students who learned from the text version most frequently (although non-significantly) ignored unpleasant emotions (standardised emotional cues and concerns) expressed by the SPs. CONCLUSIONS: The learning effect was strongest when the video-based worked example was accompanied by hints. PRACTICE IMPLICATIONS: Video-related learning approaches that embed attention-guiding hints can effectively prepare undergraduates for SP encounters.


Assuntos
Educação de Graduação em Medicina/métodos , Aprendizagem , Estudantes de Medicina/psicologia , Revelação da Verdade , Competência Clínica , Emoções , Feminino , Humanos , Masculino , Simulação de Paciente , Gravação em Vídeo , Adulto Jovem
14.
Patient Educ Couns ; 100(6): 1203-1212, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-28179074

RESUMO

OBJECTIVE: Appropriate training strategies are required to equip undergraduate healthcare students to benefit from communication training with simulated patients. This study examines the learning effects of different formats of video-based worked examples on initial communication skills. METHODS: First-year nursing students (N=36) were randomly assigned to one of two experimental groups (correct v. erroneous examples) or to the control group (no examples). All the groups were provided an identical introduction to learning materials on breaking bad news; the experimental groups also received a set of video-based worked examples. Each example was accompanied by a self-explanation prompt (considering the example's correctness) and elaborated feedback (the true explanation). RESULTS: Participants presented with erroneous examples broke bad news to a simulated patient significantly more appropriately than students in the control group. Additionally, they tended to outperform participants who had correct examples, while participants presented with correct examples tended to outperform the control group. CONCLUSION: The worked example effect was successfully adapted for learning in the provider-patient communication domain. PRACTICE IMPLICATIONS: Implementing video-based worked examples with self-explanation prompts and feedback can be an effective strategy to prepare students for their training with simulated patients, especially when examples are erroneous.


Assuntos
Comunicação , Aprendizagem , Relações Médico-Paciente , Aprendizagem Baseada em Problemas/métodos , Estudantes/psicologia , Competência Clínica , Método Duplo-Cego , Humanos , Masculino , Simulação de Paciente , Gravação de Videoteipe
15.
GMS J Med Educ ; 33(4): Doc57, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27579357

RESUMO

INTRODUCTION: Various different learning methods are available for planning tuition regarding the introduction to surgical hand disinfection. These learning methods should help to organise and deal with this topic. The use of a video film is an alternative to conventional tuition due to the real presentation possibilities of practical demonstration. OBJECTIVE: This study examines by way of comparison which form of communication is more effective for learning and applying surgical hand disinfection for medical students in their first year of studies: video-based instruction or conventional tuition. METHODOLOGY: A total of 50 first-year medical students were randomly allocated either to the "Conventional Instruction" (CI) study group or to the "Video-based Instruction" (VI) study group. The conventional instruction was carried out by an experienced nurse preceptor/nurse educator for the operating theatre who taught the preparatory measures and the actual procedure in a two-minute lesson. The second group watched a two-minute video sequence with identical content. Afterwards, both groups demonstrated practically the knowledge they had acquired at an individual practical test station. The quality (a) of the preparation and (b) of the procedure as well as (c) the quality of the results was assessed by 6 blind experts using a check list. The acceptability of the respective teaching method was also asked about using a questionnaire. RESULTS: The group performance did not differ either in the preparation (t=-78, p<0.44) or in the quality (t=-99, p<0.34). With respect to performance, it was possible to demonstrate a strong treatment effect. In the practical (t=-3.33, p<0.002, d=0.943) and in the total score (t=-2.65, p<0.011, d=0.751), the group with video-based instruction achieved a significantly better result. In response to the question as to which of the two learning methods they would prefer, the significant majority (60.4%) of students stated video instruction. CONCLUSION: In this study, the use of the video-based instruction emerged as the more effective teaching method for learning surgical hand disinfection for medical students and is preferable to conventional instruction. The video instruction is associated with a higher learning effectiveness, efficiency and acceptability.


Assuntos
Desinfecção das Mãos , Estudantes de Medicina , Gravação em Vídeo , Adulto , Avaliação Educacional , Feminino , Humanos , Aprendizagem , Masculino , Inquéritos e Questionários
16.
Nat Med ; 22(2): 138-45, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26779815

RESUMO

Electrical neuromodulation of lumbar segments improves motor control after spinal cord injury in animal models and humans. However, the physiological principles underlying the effect of this intervention remain poorly understood, which has limited the therapeutic approach to continuous stimulation applied to restricted spinal cord locations. Here we developed stimulation protocols that reproduce the natural dynamics of motoneuron activation during locomotion. For this, we computed the spatiotemporal activation pattern of muscle synergies during locomotion in healthy rats. Computer simulations identified optimal electrode locations to target each synergy through the recruitment of proprioceptive feedback circuits. This framework steered the design of spatially selective spinal implants and real-time control software that modulate extensor and flexor synergies with precise temporal resolution. Spatiotemporal neuromodulation therapies improved gait quality, weight-bearing capacity, endurance and skilled locomotion in several rodent models of spinal cord injury. These new concepts are directly translatable to strategies to improve motor control in humans.


Assuntos
Potencial Evocado Motor/fisiologia , Retroalimentação Sensorial/fisiologia , Membro Posterior/fisiopatologia , Locomoção/fisiologia , Neurônios Motores/fisiologia , Músculo Esquelético/fisiopatologia , Traumatismos da Medula Espinal/fisiopatologia , Estimulação da Medula Espinal , Raízes Nervosas Espinhais/fisiopatologia , Animais , Fenômenos Biomecânicos , Simulação por Computador , Feminino , Membro Posterior/inervação , Cinética , Músculo Esquelético/inervação , Ratos , Ratos Endogâmicos Lew , Medula Espinal/fisiologia , Traumatismos da Medula Espinal/patologia , Traumatismos da Medula Espinal/reabilitação , Fatores de Tempo , Microtomografia por Raio-X
17.
Appl Opt ; 45(22): 5590-6, 2006 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-16855655

RESUMO

Cavities have been laser ablated in the ends of single-mode optical fibers and sealed by aluminized polycarbonate diaphragms to produce Fabry-Perot pressure sensors. Both conventional fibers and novel, multicore fibers were used, demonstrating the possibility of producing compact arrays of sensors and multiple sensors on an individual fiber 125 microm in diameter. This high spatial resolution can be combined with high temporal resolution by simultaneously interrogating the sensors by using separate laser sources at three wavelengths. Shock tube tests showed a sensor response time of 3 micros to a step increase in pressure.

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