da Silva Rogeria Cristina Rangel, de Carvalho Raquel Luíza Santos, Dourado Marcia Cristina Nascimento
Center for Alzheimer's Disease, Institute of Psychiatry, Universidade Federal do Rio de Janeiro - Rio de Janeiro, RJ, Brazil.
Universidade Grande Rio - Rio de Janeiro, RJ, Brazil.
Dement Neuropsychol. 2021 Jul-Sep;15(3):314-330. doi: 10.1590/1980-57642021dn15-030003.
Emotional processing involves the ability of the individual to infer emotional information. There is no consensus about how Alzheimer's disease (AD) affects emotional processing. Objective: Our aim is to systematically review the impact of AD on emotion processing.
We conducted a search based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). The literature search was performed using the electronic databases MEDLINE (PubMed) and Science Citation Index (Institute for Scientific Information [ISI]). The following descriptors were used in the review process: emotion or emotional processing, cognition or cognitive functions, and Alzheimer disease or Alzheimer's disease. This systematic review was recorded in the International Prospective Register of Systematic Reviews (PROSPERO) under the number CRD42018115891.
We identified 425 articles, 19 of which met our criteria. Visual emotional stimuli were the most used among studies. Most studies used tasks of emotional naming, discrimination, identification, and correspondence. The results were contradictory. Many studies reported that individuals with AD were impaired on emotional perception tasks, while other results reported preserved skills. The relationship between emotional processing and cognition is also unclear. Some studies suggested that general cognitive performance affects performance in emotional perception tasks among people with AD, but other studies have shown deficits in recognizing emotion, regardless of cognitive performance.
Studies are scarce, present contradictory results, and report impairment in emotional processing in relation to cognition. Moreover, the analyses of the correlation between emotion processing and cognitive functioning failed to reveal clear relationships.
情绪加工涉及个体推断情绪信息的能力。关于阿尔茨海默病（AD）如何影响情绪加工尚无共识。目的：我们的目的是系统评价AD对情绪加工的影响。
我们根据系统评价和Meta分析的首选报告项目（PRISMA）进行检索。文献检索使用电子数据库MEDLINE（PubMed）和科学引文索引（科学信息研究所[ISI]）。在检索过程中使用了以下描述词：情绪或情绪加工、认知或认知功能、阿尔茨海默病或阿尔茨海默氏病。该系统评价在国际前瞻性系统评价注册库（PROSPERO）中记录，编号为CRD42018115891。
我们识别出425篇文章，其中19篇符合我们的标准。视觉情绪刺激是研究中使用最多的。大多数研究使用情绪命名、辨别、识别和匹配任务。结果相互矛盾。许多研究报告称AD患者在情绪感知任务上受损，而其他结果报告技能保留。情绪加工与认知之间的关系也不清楚。一些研究表明，一般认知表现会影响AD患者在情绪感知任务中的表现，但其他研究表明，无论认知表现如何，在识别情绪方面都存在缺陷。
研究较少，结果相互矛盾，且报告了与认知相关的情绪加工受损情况。此外，对情绪加工与认知功能之间相关性的分析未能揭示明确的关系。
