temporal effect

时间效应
  • 文章类型: Journal Article
    总的来说,从2021年10月至2022年9月,在瓜德罗普岛和马提尼克岛附近采样了109种鱼类(24,996个个体),以根据潜在的空间估计每种鱼类的总长度和重量之间的形态关系(长度重量关系:LWR)。时间和性别差异。在这些物种中,这是首次在大西洋中估计LWR为16种。所有测试物种的长度和重量之间都存在显着关系。对于83个测试物种,对LWR的性别效应在24个物种中表现出明显的性二态性。此外,对68个物种的时间效应和繁殖期之间的联系进行了测试,其中35个与抽样的年度季度有显著差异。最后,地理效应(即,瓜德罗普岛周围的样本与马提尼克岛的样本之间的差异)对于60种物种而言是显着的。这种岛屿效应对25个物种来说是显著的。
    In total, 109 fish species (24,996 individuals) were sampled around Guadeloupe and Martinique Islands from October 2021 to September 2022 to estimate the morphometric relationships between total length and weight (Length Weight Relationship: LWR) of each fish species according to potential spatial, temporal and sex differences. Of these species, this is the first time that the LWR was estimated in the Atlantic Ocean for 16 species. There is a significant relationship between length and weight for all tested species. For 83 tested species, the sex effect on the LWR showed significant sexual dimorphism for 24 species. Additionally, a link between the temporal effect and the reproduction period was tested for 68 species, of which 35 presented significant differences relative to the annual quarter of sampling. Finally, the geographical effect (i.e., the difference between samples from around Guadeloupe Island and those from Martinique Island) was significant for 60 species. This island effect was significant for 25 species.
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  • 文章类型: Journal Article
    不确定性已经被证明会影响对有害刺激的感知,但对长期不确定环境对疼痛和非疼痛刺激感知的影响知之甚少。为了解决这个知识差距,本研究利用了基于线索的NPU威胁任务,其中不确定和某些试验被分成不同的块。目的是研究疼痛和非疼痛刺激处理过程中不确定环境对脑电图(EEG)活动时间动态的影响。结果表明,不确定环境对神经反应的影响超出了疼痛试验,在非疼痛试验中也很明显。在不确定的情况下,已经观察到,疼痛刺激在500-700ms左右引起更大的P2振幅和晚期β带(13-30Hz)事件相关的去同步化(ERD)。然而,在某些情况下,疼痛刺激在600-700ms左右引起更强的后期伽马带(50-70Hz)事件相关同步(ERS)。对于非痛苦的试验,在不确定的环境中,与某些非疼痛刺激相比,观察到晚期正电位(LPP)分量和δ-θ带(2-7Hz)ERS的幅度明显更高。这些发现表明,不确定的环境对疼痛和非疼痛刺激的处理产生重大影响,这种影响是由不同的神经机制介导的。
    Uncertainty has been demonstrated to influence the perception of noxious stimuli, but little is known about the effects of prolonged uncertain contexts on the perception of painful and non-painful stimuli. To address this knowledge gap, the present study utilized a cue-based NPU-threat task, where uncertain and certain trials were separated into distinct blocks. The objective was to investigate the impact of uncertain contexts on the temporal dynamics of electroencephalogram (EEG) activity during the processing of painful and non-painful stimuli. The results revealed that the influence of uncertain contexts on neural responses extends beyond painful trials and is also evident in non-painful trials. In uncertain contexts, it has been observed that painful stimuli elicit larger P2 amplitudes and late beta band (13-30 Hz) event-related desynchronization (ERD) around 500-700 ms. However, in certain contexts, painful stimuli evoke stronger late gamma band (50-70 Hz) event-related synchronization (ERS) around 600-700 ms. For non-painful trials, in uncertain contexts, significantly higher amplitudes of the late positive potential (LPP) component and delta-theta band (2-7 Hz) ERS were observed compared to certain non-painful stimuli. These findings demonstrate that uncertain contexts exert a significant impact on the processing of both painful and non-painful stimuli, and this influence is mediated by distinct neural mechanisms.
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  • 文章类型: Journal Article
    背景:随着时间的推移,在高密度的亚洲城市中,个人水平和社区水平的药物中毒死亡模式的变化被低估了,尽管它们为基于社区的监测和干预提供了必要的信息。
    方法:仅病例分析,16岁,全港,我们采用香港基于人群的登记处对2001年至2010年与2011年至2016年的药物中毒死亡病例进行了比较.药物中毒死亡,从海洛因死亡和其他阿片类药物(可待因或吗啡)死亡被提取(ICD编码:T36-T50,T40.1,T40.2).二项回归用于估计死亡率模式的变化。
    结果:在3069例药物中毒死亡中,尽管香港的死亡率呈下降趋势,但发现死亡率模式发生了显著变化.总的来说,药物中毒死亡转向中年人/年轻人,丧偶/离婚,经济活跃,白领和非本地出生。自2011年以来,更多死于海洛因的人是老年人和非本地出生的,但更少的人从未结婚,在经济上不活跃。其他阿片类药物导致的死亡更多是中年人,年纪轻轻,离婚了。特别是,大多数死者转向年轻人,尤其是死于其他阿片类药物。与2001-2010年期间的死亡相比,自2021年以来,年龄≥60岁的人因海洛因死亡和因其他阿片类药物死亡的人数分别增加了3.72倍和6.50倍(OR:3.72[2.37,5.86],6.50[3.97,10.65]),分别。此外,药物中毒死亡转移到社区贫困较少的地区(更多的高等教育个人和私人/公共住房居民的混合),尤其是死于其他阿片类药物。
    结论:滥用注册药物(例如阿片类止痛药)可能是香港除非法使用毒品(海洛因)以外的脆弱人群中的上升趋势。卫生官员应在药物信息方面提供更多建议和支持。具体来说,应向中/高收入和当地出生的个人提供改善的卫生系统,并进行有关适当使用注册药物进行医疗的教育。
    The shifts in individual-level and neighborhood-level patterns of drug poisoning deaths in a high-density Asian city over time have been underestimated, although they provide essential information for community-based surveillance and interventions.
    A case-only analysis with a 16-y, territory-wide, population-based registry in Hong Kong was applied to compare drug poisoning deaths from 2001 to 2010 with 2011 to 2016. Drug poisoning deaths, deaths from heroin and deaths from other opioids (codeine or morphine) were extracted (ICD codes: T36-T50, T40.1, T40.2). Binomial regressions were used to estimate the shifts in mortality patterns.
    Among 3069 drug poisoning deaths, a significant shift in mortality patterns was found despite a decreasing mortality trend in Hong Kong. Overall, drug poisoning deaths shifted towards middle-aged/young-old, widowed/divorced, economically active, white collar and non-local born. Since 2011, more deaths from heroin were in older ages and non-local born, but less were never married and economically inactive. More deaths from other opioids were middle-aged, young-old and divorced. In particular, most decedents shifted towards young-old, especially deaths from other opioids. Compared with deaths during 2001-2010, there were 3.72- and 6.50-fold more deaths from heroin and deaths from other opioids in those aged ≥60 y since 2021 (ORs: 3.72 [2.37, 5.86], 6.50 [3.97, 10.65]), respectively. Additionally, drug poisoning deaths shifted towards areas with less neighborhood deprivation (more high-education individuals and a mix of private/public housing residents), especially deaths from other opioids.
    Misuse of registered drugs (e.g. opioid pain relievers) could be a rising trend among vulnerable subpopulations in Hong Kong other than illegal drug use (heroin). Health officials should provide more advice and support on drug information. Specifically, an improved health system with education regarding the appropriate use of registered drugs for medical treatments should be provided to mid-/high-income and local-born individuals.
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  • 文章类型: Journal Article
    UNASSIGNED:通过增加信号与掩蔽器之间的延迟,收听者更容易检测到在较长的掩蔽噪声中呈现的短暂音调信号。这种现象(过冲)受到耳蜗放大减少的影响,迄今为止,没有客观的工具来调查它。因此,听觉脑干反应(ABR)的另一范例被用于测量听觉过冲.假设增加信号和掩蔽器之间的延迟开始时间(DOT)可以减少波I和III的延迟。
    未经证实:测试了16只正常的年轻雄性豚鼠。音调脉冲刺激(信号:16kHz,持续时间为5ms)和宽带噪声(掩蔽:0.1-8.0kHz,100ms的持续时间)在三个DOT使用。为了减少噪音对波浪的影响,从单独的突发噪声中减去波形。波I和III的绝对潜伏期,波I-III的峰间潜伏期,对于0、30和100msDOT和五个信噪比,比较了波III/I的振幅比。
    UNASSIGNED:的延迟从0增加到30msDOT,然后从30减少到100msDOT(p<0.001)。与0msDOT相比,在100msDOT的潜伏期波中没有观察到显著变化(p>0.005)。此外,三种DOT之间的波峰间潜伏期和波幅比没有显着差异(p<0.005)。
    UNASSIGNED:研究结果表明,使用ABR会产生类似过冲的电生理效应。因此,使用客观测试来研究听觉耳蜗增益。
    UNASSIGNED: It is easier for a listener to detect a brief tonal signal presented in a longer masking noise by increasing the delay between the signal and the masker. This phenomenon (overshoot) is influenced by a reduction in cochlear amplification and to date, there is no objective tool to investigate it. Therefore, a different paradigm of the auditory brainstem response (ABR) was utilized to measure auditory overshoot. It was assumed that increasing the delay onset time (DOT) between a signal and a masker reduces the latencies of waves I and III.
    UNASSIGNED: Sixteen normal young male guinea pigs were tested. A tone burst stimulus (signal: 16 kHz, 5ms in duration) and wide-band noise (masker: 0.1-8.0 kHz, 100ms in duration) at three DOTs were used. To diminish the effect of the noise on waves, waveforms were subtracted from those derived from the noise burst alone. The absolute latency of the waves I and III, inter-peak latency of the waves I-III, and amplitude ratio of the waves III/I were compared for the 0, 30, and 100ms DOTs and five signal-to-noise ratios.
    UNASSIGNED: The latencies of increased from the 0 to 30ms DOT and then decreased from the 30 to 100ms DOT (p < 0.001). No significant changes were observed in the latency waves at the 100ms DOT compared to the 0ms DOT (p > 0.005). Moreover, there were no significant differences between the three DOTs regarding the inter-peak latency and amplitude ratio of the waves (p <0.005).
    UNASSIGNED: The study results showed an overshoot-like electrophysiological effect using ABR. Therefore, an objective test was used to investigate auditory cochlear gain.
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  • 文章类型: Journal Article
    Understanding the temporal effects of thinning on the composition and growth of regene-rated broadleaved woody species in coniferous plantations can provide profound references for promoting the conversion of monoculture plantations into mixed conifer-broadleaved forests, which could solve the problem that the production and ecological functions of monoculture plantations cannot be balanced. We compared the composition of regenerated woody plant species in Larix kaempferi plantation with short-term (1-3 years), medium-term (4-9 years) and long-term (>9 years) after thinning. Furthermore, we selected three regenerated tree species with higher importance value and reciprocal symbiosis with L. kaempferi, which differed in shade tolerance, including shade-intolerant species Quercus mongolica, intermediate shade-tolerant species Acer mono, and shade-tolerant species Tilia mandschurica. We analyzed the relationships between light conditions (i.e., canopy density) and the growth (i.e., base diameter and height) of those species in L. kaempferi plantation with different terms after thinning. The results showed that 46 species of regene-rated broadleaved woody plants were recorded in thinned plantations. The common and dominant tree in different terms after thinning was A. mono, and the shrub species were Lonicera japonica and Euonymus alatus. With the increasing time after thinning, species richness of regenerated trees decreased, but the ratio of tree to shrub species increased and the intermediate shade-tolerant tree species took the dominant position. The temporal effect of thinning on the growth of three tree species was affected by shade tolerance ability. Basal diameter and height of T. mandschurica were higher than those of Q. mongolica and A. mono. With the increases of time after thinning, basal diameter of T. mandschurica and height of A. mono were more sensitive to light, indicating that there were respectively \"a shade tolerance strategy\" and \"a shade avoidance strategy\" to adapt to the post-thinning environment. The effects of thinning on the composition and growth of regenerated broadleaved woody species in L. kaempferi plantations were significantly time-sensitive. When deve-loping thinning measures to promote the regeneration of broadleaved trees in plantations, we should consider to extend the thinning interval appropriately to ensure the growth of broadleaved tree seedlings (e.g., T. mandschurica and A. mono) and accelerate their migration into the canopy layer. This would promote the formation of mixed conifer-broadleaved forests and eventually realize the sustainable development of plantations.
    明确间伐对针叶人工林林下更新阔叶木本植物组成和生长影响的时间效应,可为促进人工纯林向针阔混交林转化、进而解决纯林生产与生态功能无法兼顾的问题提供参考。本研究以我国北方重要针叶人工林——日本落叶松人工林为例,比较间伐后短期(1~3年)、中期(4~9年)和长期(>9年)人工林林下更新木本植物组成的差异;并选择具有较高重要值且与落叶松互惠共生的3种更新树种蒙古栎、色木槭、糠椴,分析不同间伐时期人工林内光照(郁闭度)与更新木本植物生长的关系。结果表明: 在间伐样地内更新的阔叶木本植物达46种,不同间伐时期样地内共有且占据优势的乔木树种为色木槭,灌木树种为忍冬和卫矛。随间伐后时间的推移,更新物种数逐渐减少,但乔灌比呈增大的趋势;中性树种占据优势地位。间伐对更新树种生长影响的时间效应受树种耐荫性的影响,糠椴的基径和树高均高于蒙古栎和色木槭。随间伐后时间的延长,糠椴的基径、色木槭的树高对光照响应较敏感,分别倾向于采用“耐荫策略”和“避荫策略”以适应间伐后变化的环境。间伐对日本落叶松人工林林下更新阔叶木本植物组成和生长的影响具有明显的时间效应;在制定以促进人工林林下树种更新为目标的间伐措施时,应该考虑适当延长间伐间隔,从而保证糠椴和色木槭等阔叶树幼苗的生长,使其进入林冠层,促进形成针阔混交林,实现人工林的可持续发展。.
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  • 文章类型: Journal Article
    Post-traumatic stress disorder (PTSD) is a psychiatric disease which leads to a series of anxiety-like behaviors. In this study, we investigated the temporal effects of electroacupuncture (EA) at acupoint ST36 on anxiety-like behaviors and the expression of c-Fos in the anterior cingulate cortex (ACC) in a rat model of PTSD. PTSD was induced by a single prolonged stress procedure comprising three stages: restraint for 2 h, forced swim for 20 min, and pentobarbital sodium anesthesia. EA at acupoint ST36 was performed from 7:00-9:00 once a day for 7 consecutive days. Open field test (OFT) and elevated plus maze (EPM) test were used to assess the success of the model and evaluate anxiety-like behaviors. Immunohistochemistry was used to detect Fos-positive nuclei in the ACC. We observed that EA performed from 7:00-9:00 was associated with significantly more time spent in the center area during the OFT and in the open arm during the EPM, as well as lower corticosterone response compared with that of regular EA (P < 0.05). PTSD rats expressed significantly less c-Fos in the ACC. Timed EA significantly increased c-Fos expression in the ACC. The effect of timed EA acting on PTSD rats was linked to altered neuronal activation in the ACC. Compared to regular EA, timed EA exhibited superior therapeutic effects by attenuating anxiety-like behaviors in PTSD rats. These results emphasize the association between temporal parameters of EA manipulation and acupuncture effects. Timed acupuncture therapy may be a novel therapeutic application in the treatment of PTSD.
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  • 文章类型: Journal Article
    The current recommendation is to use daily doses of vitamin C to prevent the occurrence of the complex regional pain syndrome (CRPS) following a distal radius fracture. The study is a synthesis of the four primary studies that examine this issue. These studies have been previously examined in the meta-analysis literature. The incidence of CRPS is lower in patients treated with the vitamin C protocol compared with the control. The significance of the difference varies from P = .02 to P = .13. Our analysis points to the fact that the relative efficacy of vitamin C has decreased over the past 15 years (P < .001). In 2014, the incidence of CRPS in the vitamin C cohort is not statistically different from the incidence in the control group (P = .76). Vitamin C has lost its relative efficacy.
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  • 文章类型: Comparative Study
    The detection of amplitude modulation (AM) in quiet or in noise improves when the AM carrier is preceded by noise, an effect that has been attributed to the medial olivocochlear reflex (MOCR). We investigate whether this improvement can occur without the MOCR by measuring AM sensitivity for cochlear implant (CI) users, whose MOCR effects are circumvented as a result of the electrical stimulation provided by the CI. AM detection thresholds were measured monaurally for short (50 ms) AM probes presented at the onset (early condition) or delayed by 300 ms (late condition) from the onset of a broadband noise. The noise was presented ipsilaterally, contralaterally and bilaterally to the test ear. Stimuli were processed through an experimental, time-invariant sound processing strategy. On average, thresholds were 4 dB better in the late than in the early condition and the size of the improvement was similar for the three noise lateralities. The pattern and magnitude of the improvement was broadly consistent with that for normal hearing listeners [Marrufo-Pérez et al., 2018, J Assoc Res Otolaryngol 19:147-161]. Because the electrical stimulation provided by CIs is independent from the middle-ear muscle reflex (MEMR) or the MOCR, this shows that mechanisms other than the MEMR or the MOCR can facilitate AM detection in noisy backgrounds.
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  • 文章类型: Journal Article
    The amount of meat consumed is having a negative impact on both health and the environment. This study investigated the probability of eating meat and the amount eaten at a meal within different social, temporal and situational contexts. Dietary intake data from 4-day diet diaries of adults (19 years and above) taken from the UK National Diet and Nutrition Survey (2008/9-2013/14) were used for the analysis. Individual eating occasions were identified and the effects of where the food was eaten, with whom, day of the week, age and gender on the probability of eating meat and amount of meat eaten were modelled using general linear mixed models. Each factor showed distinctive effects on the probability of eating meat and the amount consumed. The amount of meat eaten was greater when eating with family members compared to when alone or with other companions. Both the probability and amount of meat eaten in a single eating occasion were higher on Sundays compared to the rest of the week. Eating out (e.g. restaurants/cafes) increased the probability of consuming meat and the amount compared to other situations (e.g. home, work). When considering the factors influencing meat consumption, attention must be paid to the effects of social, temporal, and situational factors as they all work to shape consumption behaviour. This information should be used in the design of interventions and development of policies for the most effective way to reduce meat consumption.
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  • 文章类型: Journal Article
    现代心理物理研究的需求需要精确的刺激传递和灵活的实验控制平台。这里,我们描述了PsyAcoustX,一个新的,在MATLAB(®)环境中编写的可免费获得的软件工具套件,用于在标准PC上进行心理声学研究。PsyAcoustX提供了一个灵活的平台来实时生成和呈现听觉刺激,并记录用户的行为反应。数据按刺激条件自动记录,并汇总在导出的电子表格中进行分析。可以在基本和复杂的听觉掩蔽任务和其他范例下自适应地测量检测阈值(例如,振幅调制检测)在几分钟内。模块的灵活性为实验者提供了对几乎所有可能的刺激参数组合的访问(例如,探针-掩蔽关系)。突出显示了示例行为应用,包括测听阈值的测量,基本同时和非同时(即,向前和向后)掩蔽范例,间隙检测,和幅度调制检测。提供了这些测量的示例,包括时间过冲的心理声学现象,心理物理调谐曲线,和时间调制传递函数。重要的是,PsyAcoustX的核心设计很容易修改,允许用户调整其基本结构并创建用于测量其他听觉属性的辨别/检测阈值的附加模块(例如,螺距,强度,等。)或双耳范式。
    The demands of modern psychophysical studies require precise stimulus delivery and flexible platforms for experimental control. Here, we describe PsyAcoustX, a new, freely available suite of software tools written in the MATLAB(®) environment to conduct psychoacoustics research on a standard PC. PsyAcoustX provides a flexible platform to generate and present auditory stimuli in real time and record users\' behavioral responses. Data are automatically logged by stimulus condition and aggregated in an exported spreadsheet for offline analysis. Detection thresholds can be measured adaptively under basic and complex auditory masking tasks and other paradigms (e.g., amplitude modulation detection) within minutes. The flexibility of the module offers experimenters access to nearly every conceivable combination of stimulus parameters (e.g., probe-masker relations). Example behavioral applications are highlighted including the measurement of audiometric thresholds, basic simultaneous and non-simultaneous (i.e., forward and backward) masking paradigms, gap detection, and amplitude modulation detection. Examples of these measurements are provided including the psychoacoustic phenomena of temporal overshoot, psychophysical tuning curves, and temporal modulation transfer functions. Importantly, the core design of PsyAcoustX is easily modifiable, allowing users the ability to adapt its basic structure and create additional modules for measuring discrimination/detection thresholds for other auditory attributes (e.g., pitch, intensity, etc.) or binaural paradigms.
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