Cansino Selene, Torres-Trejo Frine, Estrada-Manilla Cinthya, Ramírez-Barajas Liuba, Pérez-Loyda Miguel, Nava-Chaparro Aidé, Hernández-Ladrón-deGuevara Mariana, Ruiz-Velasco Silvia
Laboratory of NeuroCognition, Faculty of Psychology, National Autonomous University of Mexico, Mexico City, Mexico.
Applied Mathematics and Systems Research Institute, National Autonomous University of Mexico, Mexico City, Mexico.
Front Aging Neurosci. 2019 Feb 5;11:17. doi: 10.3389/fnagi.2019.00017. eCollection 2019.
Source memory decline has been identified as one of the types of memory most seriously affected during older age. It refers to our capacity to recollect the contextual information in which our experiences take place. Although most elderly adults will be affected by progressive source memory decline, a subset of individuals will not follow this average pattern; instead, their source memory capabilities will remain functional. Likewise, a minority of individuals will manifest an extreme decay of their source memory abilities. The objective of the present study was to identify among 120 potential predictors that significantly contributed to these two extreme source memory outcomes. Spatial source memory was measured in a sample of 519 healthy individuals between 61 and 80 years old. Individuals who performed below the 20th and above the 80th percentiles in the source memory task were defined as individuals whose episodic memory failed and succeeded, respectively. Logistic models identified five and six significant predictors of source memory success and failure in older age, respectively. High source memory performance was mainly predicted by healthy cardiovascular markers and psychological traits, whereas low source memory performance was primarily predicted by consumption habits and by less engagement in mental activities. The models identified relevant biological and life experiences that underlie these unusual source memory outcomes in older age.
源记忆衰退已被确定为老年时期受影响最严重的记忆类型之一。它指的是我们回忆自身经历发生背景信息的能力。尽管大多数老年人会受到渐进性源记忆衰退的影响，但有一部分人不会遵循这种一般模式；相反，他们的源记忆能力仍能保持正常。同样，少数人会表现出源记忆能力的极度衰退。本研究的目的是在120个潜在预测因素中找出对这两种极端源记忆结果有显著影响的因素。对519名年龄在61岁至80岁之间的健康个体进行了空间源记忆测试。在源记忆任务中表现低于第20百分位数和高于第80百分位数的个体分别被定义为情景记忆失败和成功的个体。逻辑模型分别确定了老年源记忆成功和失败的五个和六个显著预测因素。源记忆表现良好主要由健康的心血管指标和心理特质预测，而源记忆表现较差主要由消费习惯和较少参与心理活动预测。这些模型确定了导致老年人这些异常源记忆结果的相关生物学和生活经历。
