Limb Segment Load Inhibits the Recovery of Soleus H-Reflex After Segmental Vibration in Humans

We investigated the effects of vertical vibration and compressive load on soleus H-reflex amplitude and postactivation depression. We hypothesized that, in the presence of a compressive load, limb vibration induces a longer suppression of soleus H-reflex. Eleven healthy adults received vibratory stimulation at a fixed frequency (30 Hz) over two loading conditions (0% and 50% of individual's body weight). H-reflex amplitude was depressed ～88% in both conditions during vibration. Cyclic application of compression after cessation of the vibration caused a persistent reduction in H-reflex excitability and postactivation depression for > 2.5 min. A combination of limb segment vibration and compression may offer a nonpharmacologic method to modulate spinal reflex excitability in people after CNS injury.     

Crisis Support and Coping as Mediators of Well-Being in Persons with Spinal Cord Lesion

This study aims to investigate whether crisis support and coping mediate symptoms of posttraumatic stress disorder (PTSD) in individuals with spinal cord lesions (SCL). PTSD, crisis support, and coping were assessed an average of 83 days after the injury (T1), at discharge from the rehabilitation center (T2), and an average of 121 days following discharge (T3). Sixty-nine newly injured paraplegics and tetraplegics completed the questionnaire at T1, 40 (58%) at T2, and 38 (55%) at T3. Individuals with PTSD experienced significantly lower levels of social support, and used more emotional coping than did those without PTSD. On the basis of logistic regression analyses, emotional coping and the interaction between negative response and emotional coping predicted PTSD. Emotional coping is a strong predictor of PTSD in persons with new SCL.     

骨质疏松症对腰椎形态及其大体活动范围的影响

了解不同程度骨质疏松患者椎骨、椎间盘形态及腰椎矢状面大体活动度。选取34位在我院查体的老年人,并按骨密度值分组(9正常,11骨量缺少,14骨质疏松症),拍摄腰椎侧位片及磁共振图像,并测量活动度。骨质疏松组与其他两组相比,腰椎椎体前部高度增加,骨质疏松与椎间盘中部膨胀和相应椎体的塌陷有关,而与椎间盘性质无关,其腰椎大体活动范围无明显变化。骨质疏松不仅影响骨矿含量,也影响骨周围软组织,且与椎体终板变化继发椎间盘膨胀相关。     

生育获得脐血行干细胞移植治疗重大遗传性疾病的风险和对策

通过生育获得脐带血行干细胞移植是治疗重大疾病的一条可行之路,但在治疗遗传性疾病时,当事家庭、检测机构和医疗机构三方都存在着极大的风险,特别是当事家庭很有可能要承受精神和经济上的更大打击,而且客观上造成患病或者携带者人群的进一步扩大,成为一个不可忽视的社会问题。有必要进行充分的伦理思考后提出尽可能周全的办法,以降低各方面的风险。     

Stories that move? Peer athlete mentors' responses to mentee disability and sport narratives

BackgroundHow people respond to the stories people tell matters. Past research demonstrates that there are varied responses to the narratives individuals with spinal cord injury (SCI) use. Yet, no research has explored how peer athlete mentors with SCI respond to their mentees' stories about sport participation that are framed in different disability narratives.PurposeTo explore how peer athlete mentors respond to four mentees' vignettes representing various attitudes towards adapted sport.MethodsThirteen peer athlete mentors discussed these vignettes in hour-long interviews; their responses were analysed using a dual narrative analysis.ResultsPeer athlete mentors tailored their responses to each individual vignette. Specifically, responses to the most open vignettes were tailored to the mentees' disability narratives and provided a variety of resources and sport information. This type of response to mentees' stories can support and validate these mentees' experiences and increase the likelihood that mentees will try sport. In contrast, peer athlete mentors' responses to the heavily resistant vignettes contained limited information about sport. These responses also challenged the mentees' disability narratives. These types of responses may be counter-productive as they invalidate the mentees' experiences with sport and SCI and may further deter sport participation.ConclusionWhile peer athlete mentors tailored the information they would provide to mentees who use different disability narratives, they expressed difficulties responding to the heavily resistant narrative. Future peer athlete mentor training should address this difficulty by providing practice around how to communicate with individuals expressing resistant narratives.     

When good pain turns bad

Classically, pain is viewed as being mediated solely by neurons. However, recent research has shown that activated glial cells (astrocytes and microglia) within the spinal cord amplify pain. These nonneuronal cells play a major role in the creation and maintenance of pathological pain. Glia become activated by immune challenges (viral or bacterial infection) and by substances released by neurons within the pain pathway. Activated glia amplify pain by releasing proinflammatory cytokines. Taken together, research findings suggest a novel approach to human pain control that targets glia. In addition, it is likely that such glial-neuronal interactions are not unique to pain, but rather reflect a general rule of sensory processing.     

Problematic donation procedures vs. futuristic research and treatment applications: A dichotomous social representation of stem cells in Italy

IntroductionCurrently, stem cells (SC) are one of the most studied issues of medical research as well as a widespread, complex, socially and ethically relevant issue.ObjectiveThe general aim of the present study is to explore how social representations (SR) of SC is different for people more or less willing to donate SC, also comparing bone marrow SC (BMSC) donation and umbilical cord blood SC (UCBSC) donation.MethodA paper-and-pencil survey was administrated to 78 Italian respondents. A structural analysis of SC-SRs (prototypical and co-occurrence analysis) was conducted comparing people with a high/low intention to donate UCBSC/BMSC.ResultsSimilarly to other bioethically relevant issues, SR of SC seems to be ambivalent and dichotomously organized, with the donation procedure been a barrier.ConclusionThese results are in line with studies finding two sets of dichotomies: on the one hand, a gift-of-life/replacement-of-body-parts dichotomy coexisting within people's SR of organ donation; on the other hand, a help/pain and needle dichotomy within blood donation's SR. Directions for future research are suggested.