■患有轻度认知障碍(MCI)综合征的人经常报告导航困难,伴随着自我中心和非中心空间记忆的损害。然而,研究表明,无论是身体(例如,电机指令,本体感受,前庭信息)和视觉认知(例如,地图,方向箭头,注意标记)提示可以支持MCI中的空间记忆。
■我们旨在评估衰老中创新空间训练的导航线索。
■本研究招募了15名MCI患者。通过使用五种不同的虚拟现实(VR)辅助编码导航程序(身体,只有视觉,交互式分配中心地图,减少执行负载,没有提示的自由导航)。身体条件包括沉浸式VR设置,以参与自我运动提示,仅视觉条件包括无交互的被动导航,在交互式非中心地图中,患者可以使用鸟瞰地图,在执行负荷降低的情况下,采用了方向提示和注意标记,在自由航行期间,没有实施任何援助。
■与仅视觉和无提示的自由导航相比,身体状况改善了空间记忆。此外,交互式非中心地图优于没有提示的自由导航。令人惊讶的是,减少的执行负荷与仅在vison条件下相当。此外,在所有测试试验中,观察到自由导航对非中心记忆的不利影响.
■这些发现挑战了衰老中空间模型表示的概念,这表明空间地图可能会受到环境最初编码的模态的影响。
UNASSIGNED: Individuals with mild cognitive impairment (MCI) syndrome often report navigation difficulties, accompanied by impairments in egocentric and allocentric spatial memory. However, studies have shown that both bodily (e.g., motor commands, proprioception, vestibular information) and visual-cognitive (e.g., maps, directional arrows, attentional markers) cues can support spatial memory in MCI.
UNASSIGNED: We aimed to assess navigation cues for innovative spatial training in aging.
UNASSIGNED: Fifteen MCI patients were recruited for this study. Their egocentric and allocentric memory recall performances were tested through a navigation task with five different virtual reality (VR) assistive encoding navigation procedures (bodily, vision only, interactive allocentric map, reduced executive load, free navigation without cues). Bodily condition consisted of an immersive VR setup to engage self-motion cues, vision only condition consisted of passive navigation without interaction, in the interactive allocentric map condition patients could use a bird-view map, in the reduced executive load condition directional cues and attentional markers were employed, and during free navigation no aid was implemented.
UNASSIGNED: Bodily condition improved spatial memory compared to vision only and free navigation without cues. In addition, the interactive allocentric map was superior to the free navigation without cues. Surprisingly, the reduced executive load was comparable to vison only condition. Moreover, a detrimental impact of free navigation was observed on allocentric memory across testing trials.
UNASSIGNED: These findings challenge the notion of an amodal representation of space in aging, suggesting that spatial maps can be influenced by the modality in which the environment was originally encoded.