共查询到17条相似文献,搜索用时 31 毫秒
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论医学目的的层次性与吗啡的使用 总被引:1,自引:0,他引:1
论医学目的的层次性与吗啡的使用浙江医科大学(杭州310031)郭永松胡斯隆张国芳一临床医务人员对吗啡常常有着复杂的心态,一方面,面对患有剧烈疼痛的病人(如癌症晚期的剧痛),使用吗啡可能是最好的办法;另一方面,又要担心由于使用吗啡,可能给病人带来的种种... 相似文献
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药物成瘾是一类精神及行为障碍, 涉及到中枢神经系统的病变。毒蕈碱受体(Muscarinic receptor, M受体)属于胆碱能受体, 分5种亚型。行为学研究表明, 干预M受体能有效影响药物成瘾行为, 但其神经机制还亟待探索。阿片类药物与精神活性药物均能激活中枢多巴胺系统, 而M受体与多巴胺系统在多个脑区产生了交互作用。其中激动M2及M4受体抑制了多巴胺系统功能, 而激动M5受体增强了多巴胺系统功能, 与干预M2、M4、M5受体对药物成瘾行为的影响相对应。以上证据提示, 干预M受体可能通过影响多巴胺系统对药物成瘾起作用。 相似文献
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药物滥用导致的行为敏感化被认为与成瘾过程密切相关。本实验探讨吗啡导致的大鼠行为敏感化与神经递质乙酰胆碱的关系。实验动物分为3组,分别进行生理盐水、吗啡(10.0mg/kg)、吗啡(10.0mg/kg)+胆碱酯酶抑制剂毒扁豆碱(0.2mg/kg)前处理,36小时腹腔注射4次。前处理结束1周所有动物注射小剂量吗啡(4.0mg/kg);使用生理盐水前处理的动物,第2周注射毒扁豆碱(0.2mg/kg);使用吗啡前处理的动物,第2周注射小剂量吗啡+毒扁豆碱(0.2mg/kg),第3周再次注射小剂量吗啡。动物每次接受注射后立即记录其在两小时内的活动量(10分钟为一个记录单元)。结果表明,毒扁豆碱既能够抑制吗啡诱导的行为敏感化,也能够阻断小剂量吗啡对行为敏感化的“点燃”作用。由此推论,吗啡导致的行为敏感化与其抑制乙酰胆碱分泌有关。 相似文献
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随着电子产品和移动互联网应用的进一步普及,青少年投入网络游戏的时间也相应增加,因网络游戏导致的相关问题也日渐凸显,青少年网络游戏成瘾问题也因此受到越来越多的关注。本文从网络游戏成瘾的定义、诊断、相关环境和个体因素及干预方法等方面综述网络游戏成瘾的研究现状,总结了游戏成瘾研究发展的阶段、特点和当前焦点,提出基于强化学习理论的青少年游戏成瘾模型,并展望了青少年游戏成瘾的研究方向。 相似文献
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中国大学生网络成瘾倾向问卷的初步研究 总被引:4,自引:0,他引:4
网络成瘾是一种对互联网络的心理依赖,包括网络关系成瘾、网络娱乐成瘾、信息搜集成瘾三种类型。被试为中国重庆三所高校的大学生675人。对其中随机抽取的390份数据进行探索性因素分析,得出初步的因素结构为:网络关系成瘾倾向包括了问题、依附、认知偏差和失控四种倾向;网络娱乐成瘾倾向和信息搜集成瘾倾向包括问题、依附和失控倾向。得到较好的问卷内部一致性系数、分半信度、内容效度和结构效度。对余下285份数据进行验证性因素分析,得到较好的模型拟合指数。相关关系检验发现三类网络成瘾倾向与使用频率都有显著相关.与使用时间都无显著相关。T检验发现女生在网络关系成瘾倾向的依附倾向得分显著高于男生,男生在网络娱乐成瘾倾向和信息搜集成瘾倾向的问题倾向得分显著高于女生。 相似文献
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大学生因特网成瘾障碍的研究 总被引:11,自引:1,他引:11
本研究根据目前广泛认可的因特网成瘾障碍(Internet Addiction Disorder,IAD)诊断标准自编问卷,调查了上海市6所高校370名大学生的上网情况。结果表明:(1)自编问卷质量的各指标皆良好,问卷具有较好的稳定性和准确性。(2)上海市大学生IAD的发生率大约为8.1%。(3)男生比女生、理科比文科、大二年级比其它年级的学生陷入网络的程度深。(4)上网者每周的上网时间、使用网络工具的数量、上网动机的数量与使用网络的程度相关。(5)IAD者在网络使用的特点上明显不同于非IAD者(N-IAD者)。 相似文献
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The immunotoxin 192-saporin, infused intracerebroventricularly into rats, destroys cholinergic neurons in the basal forebrain nuclei. Doses required for complete cholinergic loss also kill some Purkinje cells. The immunotoxin OX7-saporin, when infused intraventricularly into rats, destroys Purkinje cells in a pattern similar to that produced by 192-saporin, without affecting cholinergic neurons. Thus, we used OX7-saporin to distinguish behavioral effects of 192-saporin due to cerebellar damage versus those due to cholinergic cell loss. Three doses of 192-saporin (1.6, 2.6, and 3.3 micrograms/rat) were chosen along with a dose of OX7-saporin (2.0 micrograms/rat) that produced Purkinje loss equivalent to the two highest doses of 192-saporin. Groups of Fischer-344 rats were trained in the multiple choice reaction time task and retested with more complex tasks after lesioning. They were also tested in the water maze, passive avoidance, acoustic startle, and open field. The OX7-saporin group exhibited changes in many tests suggesting hypermotility and sensory deficits. The 192-saporin groups differed from the OX7-saporin group when they displayed deficits in multiple choice reaction time tasks in which novel challenges were introduced, including sessions with a noise distractor, shortened and lengthened intertrial intervals, and use of nine instead of five sources of light stimulus. The 192-saporin groups showed no impairment in the other tasks. The cholinergic basal forebrain lesion may mask some of the effects of cerebellar damage up to a threshold after which effects of Purkinje cell loss predominate when 192-saporin is administered intraventricularly. 相似文献
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Nonsuicidal self‐injury (NSSI) may be characterized as a process addiction for some individuals who self‐injure. The authors review findings on the addictive features of NSSI, including compulsivity, loss of control, continued use despite negative consequences, and tolerance. 相似文献
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Sex addiction prevalence is estimated between 3% and 10%. There are multiple pathways to its development including biological predispositions, trauma and attachment issues, comorbid conditions, among others. Although controversy still surrounds sex addiction's conceptualization, diagnosis, and treatment, some approaches to treatment have shown promise, including cognitive behavioral therapy (CBT), acceptance and commitment therapy (ACT), and use of selective serotonin reuptake inhibitors (SSRIs). Empirical support, clinical implications, and future directions are discussed. 相似文献
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André Luiz Monezi Andrade Adriana Scatena André Bedendo Sonia Regina Fiorim Enumo Letícia Lovato Dellazzana-Zanon Helena Bazanelli Prebianchi Wagner de Lara Machado Denise de Micheli 《International journal of psychology》2020,55(6):941-950
This study evaluated the prevalence of Internet addiction (IA) and its association with negative psychological symptoms in Brazilian adults. A network analysis was conducted to estimate specific variables and their expected influence on IA. In this cross-sectional study, 15,476 adults (Mage = 37.5, SD = 9.59) completed an open web-based survey. Three questionnaires were used: the Internet Addiction Test (IAT), Depression Anxiety and Stress Scale (DASS-21) and Satisfaction With Life Scale (SWLS). Based on IAT scores, participants were classified as No-Risk user (NRU), Low-Risk user (LRU) or High-Risk user (HRU). We observed that 4.8% of the participants were classified in the HRU group. In addition, their risk for severe symptoms of depression was 10 times higher and, for anxiety, seven times higher than that in the NRU group (p < .001). Time spent using smartphones was also significantly higher in the HRU group (Mhours = 5.1, p < .001). The main factors associated with IA were depression, gender and anxiety, but the variable “having children” was the most influential in the IA network. These findings suggest that psychiatric symptoms are the main factors associated with IA among the adult population. 相似文献
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Ten years post–Hurricane Katrina, the authors reflected on the aftermath through the eyes of addiction treatment professionals to become better prepared for future tragedies. The lessons learned, the authors' personal reflections, and implications for clinical practice and counselor education are provided. 相似文献