辅助生殖技术引发的案例伦理分析

辅助生殖技术虽然给无数个不育夫妇带来了福音,但同时也给人类传统的伦理观念带来了冲击和挑战,同时它的滥用还可能给人类造成灾难。通过对由辅助生殖技术引发的7个典型案例的伦理分析和研究,来进一步探讨辅助生殖技术中伦理问题及其对策。     

Common pathways in mental imagery and pain perception: an fMRI study of a subject with an amputated arm

The present paper reviews data from two previous studies in our laboratory, as well as some additional new data, on the neuronal representation of movement and pain imagery in a subject with an amputated right arm. The subject imagined painful and non-painful finger movements in the amputated stump while being in a MRI scanner, acquiring EPI-images for fMRI analysis. In Study I (Ersland et al., 1996) the Subject alternated tapping with his intact left hand fingers and imagining "tapping" with the fingers of his amputated right arm. The results showed increased neuronal activation in the right motor cortex (precentral gyrus) when tapping with the fingers of the left hand, and a corresponding activation in the left motor cortex when imagining tapping with the fingers of the amputated right arm. Finger tappings of the intact left hand fingers also resulted in a larger activated precentral area than imagery "finger tapping" of the amputated right arm fingers. In Study II (Rosen et al., 2001 in press) the same subject imagining painful and pleasurable finger movements, and still positions of the fingers of the amputated arm. The results showed larger activations over the motor cortex for movement imagining versus imagining the hand being in a still position, and larger activations over the sensory cortex when imagining painful experiences. It can therefore be concluded that not only does imagery activate the same motor areas as real finger movements, but also that adding instructions of pain together with imaging moving the fingers intensified the activation compared with adding instructions about non-painful experiences. From these studies, it is clear that areas activated during actual motor execution to a large extent also are activated during mental imagery of the same motor commands. In this respect the present studies add to studies of visual imagery that have shown a similar correspondence in activation between actual object perception and imagery of the same object.     

右美托咪定对甲亢患者术中血流动力学的比较研究

研究右美托咪定辅助甲亢患者麻醉诱导时血流动力学的改变。40例甲亢患者,随机分为两组：右美托咪定组（ n＝20）与对照组（n＝20）。记录术前与麻醉诱导后的血压、心率、心率收缩压乘积,抽取静脉血进行儿茶酚胺检测。结果右美托咪定组诱导后、插管后即刻、1分钟、2分钟、3分钟,血压、心率、心率收缩压乘积低于对照组,差异有统计学意义（P＜0．05）。右美托咪定组儿茶酚胺在插管后1分钟、插管后2分钟、插管后3分钟低于对照组差异有统计学意义（P＜0．05）。右美托咪定有利于维持甲亢患者麻醉诱导中血流动力学的稳定。     

推理判断中双重加工过程的协作与转换机制

推理判断中双重加工理论的发展经历了不同发展阶段, 早期主要对两个加工过程的定义及特征的关注, 当前转向对两者间的协作及转换机制的研究。本研究梳理了双重加工过程协作及转换机制的代表性模型及其相关实验支持证据, 综合归纳为以下三类模型：序列加工模型(Serial processing model)、平行竞争模型(Parallel competitive model)以及混合模型(Hybrid model), 并比较和论述了三类模型在两个加工过程的转换和协作机制、冲突探查的加工机制、偏差反应的解释机制上的异同, 以及三类模型各自面临的问题。     

Religio‐Spiritual Participation in Two American Indian Populations

Following a previous investigation of religio‐spiritual beliefs in American Indians, this article examined prevalence and correlates of religio‐spiritual participation in two tribes in the Southwest and Northern Plains (N = 3,084). Analysis suggested a “religious profile” characterized by strong participation across three traditions: aboriginal, Christian, and Native American Church. However, sociodemographic variables that have reliably predicted participation in the general American population, notably gender and age, frequently failed to achieve significance in multivariate analyses for each tradition. Religio‐spiritual participation was strongly and significantly related to belief salience for all traditions. Findings suggest that correlates of religious participation may be unique among American Indians, consistent with their distinctive religious profile. Results promise to inform researchers’ efforts to understand and theorize about religio‐spiritual behavior. They also provide tribal communities with practical information that might assist them in harnessing social networks to confront collective challenges through community‐based participatory research collaborations.