DIFFERENTIAL RATES OF AGING OF THE CEREBRAL HEMISPHERES

越来越多的研究表明， 大脑半球可能比左脑衰老得更快，这一点可以通过一项表现来证明。 任务评估功能右减 半球 这种递减在评估功能的任务中是看不到的 专门用于左半球。 然而，最近， 在直接解决这一问题的研究中， 运用认知心理学和大脑半球的方法 偏侧性 这项提案的科学目的是调查 半老化与分散注意力/双重任务方法。 已经 他提出，每个大脑半球都可以被看作是有一个 独立的能力池。 当两个任务在单个池上绘制时， 如果需求超过容量，则会导致性能下降 一个或两个任务的结果。 为了测试老年人 个体的右脑功能衰退更严重 比在左边，提出了一个实验，其中单一和双重任务 将由年轻和老年受试者进行，包括 左右食指敲击、音节重复和WAIS阻滞 设计解决方案与非轻敲的手。 先前的研究 表明，对于年轻的受试者，这些任务表明， 当右手手指敲击和块设计解决时， 组合（左半球任务），当左手手指敲击和 块设计解决相结合（两个右半球的任务）。 一 对老年受试者的干扰效应显著不成比例， 后一项任务将表明右半球功能更强 下降 这项研究的实际收获包括功能的划分， 完整性和/或减少在两个大脑半球在以后的 生活 这种减少将对日常生活产生重要影响。 老年人的功能。 如前所述，如果 大脑半球确实显示出与年龄相关的衰退， 可能会受到负面影响。 因此，本研究报告提供了信息， 与晚年生活中的能力和福祉问题有关。

Converging sources of research indicate that the right cerebral hemisphere may age sooner than the left, as evidenced by a performance decrement on tasks assessing functions specialized to the right hemisphere. Such a decrement is not seen for tasks assessing functions specialized to the left hemisphere. Recently, however, mixed results have been obtained in studies which address this issue directly by employing methods based in cognitive psychology and hemispheric laterality. The scientific purpose of this proposal is to investigate right hemiaging with divided attention/dual task methods. It has been proposed that each cerebral hemisphere might be viewed as having an independent pool of capacity. When two tasks drawing on a single pool are combined and demand exceeds capacity, a performance decrement results on one or both tasks. In order to test whether older individuals have a greater functional decrement in the right hemisphere than in the left, an experiment is proposed where single and dual tasks will be performed by both younger and older subjects, consisting of right and left index finger tapping, syllable repetition, and WAIS block design solution with the non-tapping hand. Previous research has indicated that for younger subjects these tasks demonstrate performance decrements when right finger tapping and block dsign solving are combined (both left hemisphere tasks), and when left finger tapping and block design solving are combined (both right hemisphere tasks). A significantly disproportionate interference effect for older subjects on the latter task will indicate greater right hemisphere functional decline. Practical gains to this research include the delineation of functional integrity and/or decrement in the two cerebral hemispheres in later life. Such a decrement will have important implications for the daily functioning of older adults. If, as previously suggested, the right hemisphere does show an age-related decline, manipulospatial activities may be negatively affected. The present study thus provides information relevant to issues of competence and well-being in later life.