与图像识别相关的认知过程对视觉-前庭相互作用的影响

文献信息

中文摘要

文献中越来越多的文章强调扫视再调制在代偿机制中的重要性，并且前庭损伤后SHIMP扫视的重新出现与患者在DHI上报告的症状改善强烈相关。为了评估注意过程和工作记忆对视觉-前庭相互作用的影响，我们设计了三个独立但相互关联的实验。在前两个实验中，完全健康的受试者（第一个实验）和有单侧或双侧前庭缺陷病史的患者（第二个实验）接受了SHIMP模式的vHIT和功能性头脉冲试验。这两项测试在同一场次中进行，最初分别进行（“分离方案”），随后同时进行（“联合方案”）。分析了SHIMP扫视的平均潜伏期及其聚集程度，最后分析了Landolt C的识别率。随后，评估了这些参数在“分离方案”和“联合方案”之间的任何变化，并且在第二个实验中，将“分离方案”和“联合方案”之间的差异与DHI测量的症状严重程度进行相关性分析。目的是验证在“联合方案”中，两项任务近乎同时进行（两者均由共享的顶叶皮层底物介导）是否会改变任何参数。在第三个实验中，我们使用了HIMP模式的vHIT和fHIT，以分离和联合方案进行。目的是验证扫视功能与识别相关认知负荷的结合是否会有利地影响恢复性扫视的潜伏期和聚集。结论：结果提示视觉识别影响视觉-前庭相互作用，支持用于生态平衡评估和解决临床差异的整合双任务方案，尽管需要更大规模的多中心研究来确认这些初步发现。

英文摘要

An increasing number of articles in the literature highlight the importance of saccadic remodulation in compensatory mechanisms, and the reappearance of SHIMP saccades following a vestibular insult correlates strongly with an improvement in symptoms reported by patients on the DHI. To assess the influence of attentional processes and working memory on visuo-vestibular interaction, we designed three independent yet interrelated experiments.In the first two experiments, perfectly healthy subjects (first experiment) and patients with a history of unilateral or bilateral vestibular deficits (second experiment) underwent vHIT in SHIMP mode and the Functional Head Impulse Test. The two tests were performed in the same session, initially separately ("separate protocol") and subsequently simultaneously ("combined protocol"). The mean latency of SHIMP saccades and their degree of clustering were analyzed, and finally, the recognition rate of the Landolt C. Subsequently, any variations in these parameters between the "disjoint protocol" and the "joint protocol" were assessed, and, in the second experiment, the differences between the "disjoint protocol" and the "joint protocol" were correlated with the severity of symptoms measured by the DHI. The aim was to verify whether, during the "joint protocol," the near-simultaneity of the two tasks, both mediated by shared parietal cortical substrates, altered any parameters. In the third experiment, we used vHIT in HIMP mode and fHIT, performed in disjointed and joint protocols. The objective was to verify whether the conjunction of saccadic function and cognitive load related to recognition could influence the latency and clustering of recovery saccades favorably.Conclusions: Results suggest visual recognition impacts visuo-vestibular interaction, supporting integrated dual-task protocols for ecological balance assessment and resolving clinical discrepancies, though larger multicenter studies are needed to confirm these preliminary findings.