Potency of food deprivation intensity cues as discriminative stimuli.

Rats were trained to use stimuli arising from 0 and 24 hr without food as discriminative signals for shock. In Experiment 1, one group was shocked under 0-hr food deprivation and not shocked under 24-hr food deprivation. Another group received the reverse contingency. The groups received only 3 training trials under each deprivation level. Learning was revealed in a test phase when greater extinction of freezing was observed under the nonshocked than under the shocked deprivation level for both groups. A similar pattern of results was obtained in Experiment 2 when auditory cues were also relevant throughout training. Furthermore, prior training with food deprivation cues seemed to reduce learning about auditory cues subsequently trained in compound with deprivation stimuli. The results indicate that food deprivation intensity cues can be potent discriminative stimuli. The idea that deprivation cues function as conditioned modulatory stimuli cues is also discussed.     

同性恋的社会伦理评价

按照WHO的健康定义与Engel疾病模式,同性恋仍然是一种疾病;也仍然是一种性偏离或性变异。同性恋如同其他性行为或性变异一样,必须受到社会控制和道德控制。而男同性恋对艾滋病传播的负面影响绝不能忽视。     

现代医学的有限与无奈

在充分肯定现代医学在取得巨大进步的同时,分别从疾病病因、发病机制、早期诊断、疗效和预后等8个方向阐述了现代医学在防治人类疾病中的局限性,并简要分析了产生这种局限性的原因。     

A comparison of the effects of fimbria-fornix, hippocampal, or entorhinal cortex lesions on spatial reference and working memory in rats: short versus long postsurgical recovery period.

Using a radial maze task and different postoperative recovery periods, this experiment assessed and compared the reference and working memory performances of adult Long-Evans male rats subjected to entorhinal cortex, fimbria-fornix, and hippocampus lesions. Sham-operated rats were used as controls. In order to see whether the duration of the postsurgical recovery period would influence acquisition of the complex radial maze task, training began 1 month following surgery (Delay 1) for half the rats in each group, while for the other half training was started 6.5 months following surgery (Delay 2). The results indicated that at both recovery periods the entorhinal cortex lesions failed to affect either working or reference memory in the spatial task. Conversely, both fimbria-fornix and hippocampus lesions impaired both reference and working memory. While the reference memory deficit was generally similar in both fimbria-fornix and hippocampal lesion groups, analysis of the results for working memory indicated that at the longer delay rats with fimbria-fornix lesions were still impaired but in animals that had the hippocampus removed, working memory did not differ from that of controls. These results suggest that there was some recovery in those rats with hippocampal lesions (e.g., on the working memory task) but both hippocampal and fimbria-fornix animals were still impaired compared to controls when training was delayed 6.5 months following the operations.     

意识:大脑整体运动态

简要叙述有关意识问题的不同理论观点,同时从一个全新的角度提出对意识内涵的理解:意识是大脑整体运动态,是能够与环境相互作用形成心理现象的大脑"运动态".意识是大脑运动的固有属性,大脑运动的本质功能就是产生意识.意识随着大脑的进化而进化,同时又是大脑进化的动因.     

脐血干细胞移植中的伦理思考

现代干细胞移植技术飞速发展。脐血干细胞移植在伦理学上具有胚胎干细胞和骨髓干细胞移植治疗不可比拟的优势,但是其伦理学上的可接受性并不等于伦理问题的消失。在脐血干细胞移植研究过程中,应该遵循伦理道德观和科学理性的原则,健康发展,造福人类。     

哮喘防控模式的几点思考

简单介绍了在支气管哮喘患者教育和管理工作中的若干体会。结果表明,我们所采取的哮喘教育管理体系(包括哮喘患者门诊、哮喘患者协会和哮喘宣教中心)是一种先进的医疗服务模式,不仅可以有效地改善医患关系,还可以显著提高哮喘患者对哮喘认知水平和防治疾病的依从性,提高哮喘控制水平、生命质量,减少非预约门诊、急诊、住院次数,降低医疗费用。     

幼儿的情绪表现规则知识发展及其与家庭情绪表露、社会行为的相关研究

通过幼儿情绪表现规则知识的访谈、家庭情绪表露问卷和幼儿社会行为评估问卷调查,考察了112名3～6岁幼儿情绪表现规则知识的发展及其与家庭情绪表露、社会行为的关系。结果表明:(1)幼儿的表情调节知识存在显著的年龄差异,大班幼儿比小班幼儿具有更高的表情调节知识、更倾向于掩饰消极情绪;(2)幼儿的表情调节知识与情绪表达的人际支持、工具支持的结果期望存在显著正相关,即幼儿掩饰消极情绪是因为预期情绪表达不会得到他人理解和帮助;(3)幼儿报告面对父母同伴教师不同在场者时具有不同的情绪体验,且幼儿的人际支持结果预期存在年龄和在场者的交互作用;(4)家庭情绪表露与幼儿的人际支持的结果预期存在显著正相关、与工具支持的结果预期存在显著负相关;(5)倾向于掩饰消极情绪的幼儿表现出更多的亲社会行为,认为表达消极情绪会带来不良结果的幼儿表现出更多的害羞退缩行为。     

乳房手术治疗中的伦理要求

乳腺外科手术诊疗工作有着不同于一般手术的医学伦理要求.通过对乳房手术前、中、后三个时间段的不同伦理要求进行分析可见,只要乳腺外科医生能以医务人员的职业道德规范严格要求自己,在不断学习专业技术的同时,加强自身对医学伦理学的学习,给予患者充分的理解、尊重和心理支持,一定能使每位乳腺病患者的手术治疗全过程符合医学伦理要求.     

哮喘防控模式的几点思考

简单介绍了在支气管哮喘患者教育和管理工作中的若干体会.结果表明,我们所采取的哮喘教育管理体系(包括哮喘患者门诊、哮喘患者协会和哮喘宣教中心)是一种先进的医疗服务模式,不仅可以有效地改善医患关系,还可以显著提高哮喘患者对哮喘认知水平和防治疾病的依从性,提高哮喘控制水平、生命质量,减少非预约门诊、急诊、住院次数,降低医疗费用.