Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio.
Otol Neurotol. 2023 Oct 1;44(9):949-955. doi: 10.1097/MAO.0000000000003990. Epub 2023 Aug 15.
We hypothesized that the addition of visual feedback during roll tilt perceptual training would yield a significant reduction in vestibular perceptual thresholds relative to a control group.
We previously showed that roll tilt vestibular thresholds could be improved through a perceptual training protocol that used a simple auditory cue. Variability in training outcomes within the treatment group suggested that an auditory cue alone may be suboptimal for improving self-motion perception.
In 10 healthy adults, roll tilt vestibular thresholds, quantifying the smallest motion that can be reliably perceived, were measured before ("pretraining") and after ("posttraining") a training protocol designed to improve roll tilt perception. The protocol included 1,300 trials of 0.5 Hz whole-body roll tilt over 5 days, with participants being given both an auditory cue ("correct' vs. "incorrect') and visual feedback (viewing a stationary visual scene) after indicating their perceived direction of tilt. A control group (N = 10) underwent only the "pretraining" and "posttraining" assessments.
The training group showed an average decrease in roll tilt vestibular thresholds of 1.7% ± 56%, with training outcomes varying widely. Three individuals showed an average increase in roll tilt thresholds of 69.7%, whereas the remaining seven adults showed an average decrease in thresholds of 32.3%.
These data show that visual feedback during roll tilt perceptual training leads to heterogenous outcomes, but in a subset of individuals, it may lead to improvements in perceptual precision. Additional work is needed to define the optimal training parameters, including feedback schema, before investigating potential clinical applications.
我们假设在翻滚倾斜知觉训练中添加视觉反馈会相对于对照组显著降低前庭知觉阈值。
我们之前表明，通过使用简单听觉提示的知觉训练方案，可以改善翻滚倾斜前庭阈值。治疗组内训练结果的可变性表明，仅使用听觉提示可能并不理想，无法改善运动感知。
在 10 名健康成年人中，测量了翻滚倾斜前庭阈值，该阈值量化了可以可靠感知到的最小运动，在设计用于改善翻滚倾斜感知的训练方案之前（“训练前”）和之后（“训练后”）进行测量。该方案包括 5 天内进行的 1300 次 0.5Hz 全身翻滚倾斜，参与者在指示其倾斜方向后，会同时获得听觉提示（“正确”与“错误”）和视觉反馈（观看静止的视觉场景）。对照组（N=10）仅进行“训练前”和“训练后”评估。
训练组的翻滚倾斜前庭阈值平均降低了 1.7%±56%，训练结果差异很大。有 3 人平均倾斜阈值增加了 69.7%，而其余 7 名成年人的平均阈值降低了 32.3%。
这些数据表明，在翻滚倾斜知觉训练中添加视觉反馈会导致结果的异质性，但在一部分个体中，它可能会提高知觉精度。在研究潜在的临床应用之前，需要进一步定义包括反馈方案在内的最佳训练参数。
