Department of Rehabilitation Medicine, Nishiyamato Rehabilitation Hospital, Nara, Japan; Graduate School of Health Science, Kio University, Nara, Japan.
Department of Otolaryngology-Head and Neck Surgery, Nara Medical University, Nara, Japan.
Neurosci Lett. 2020 Jan 1;714:134598. doi: 10.1016/j.neulet.2019.134598. Epub 2019 Oct 31.
The body's subjective postural vertical (SPV) has been thought to be affected by somatosensory information. How the SPV is perceived based on what types of somatosensory information has not been determined experimentally by manipulating somatosensory conditions. We investigated the effects of disturbing the somatosensory information from a seat pad and/or vestibular sensory information on the SPV in 15 healthy adults. Their SPV values were measured under four conditions (control, somatosensory, vestibular, and somatosensory + vestibular) in random order. The average and absolute SPV values were measured. In the somatosensory condition, a foam rubber pad was placed on the seating surface and the subject's SPV was measured. In the vestibular condition, the SPV was measured during galvanic vestibular stimulation (GVS). The somatosensory + vestibular condition was used to measure the SPV during combined somatosensory and vestibular stimulation. The mean SPV value was significantly increased in the somatosensory + vestibular condition compared to the other three conditions. The absolute value of SPV was significantly increased in the somatosensory and somatosensory + vestibular conditions compared to the control and vestibular conditions. There was no significant difference in the average or absolute SPV values in the vestibular condition compared to the other conditions. There was no significant difference between SPV errors when somatosensory information was disturbed or when somatosensory + vestibular information was disturbed. When the somatosensory information from the seat was disturbed, the SPV error increased, and it also shifted under the influence of the vestibular sensory information modulation. These results indicate that somatosensory information from the seat plays an important role in SPV in healthy adults.
人体的主观姿势垂直（SPV）被认为受到躯体感觉信息的影响。但是，通过操纵躯体感觉条件，尚未从实验上确定 SPV 是基于哪种类型的躯体感觉信息来感知的。我们调查了在 15 名健康成年人中，干扰座椅垫和/或前庭感觉信息对 SPV 的影响。他们的 SPV 值在四种条件（对照、躯体感觉、前庭和躯体感觉+前庭）下以随机顺序测量。测量了平均和绝对 SPV 值。在躯体感觉条件下，在座椅表面放置泡沫橡胶垫并测量受试者的 SPV。在前庭条件下，在电前庭刺激（GVS）期间测量 SPV。在躯体感觉+前庭条件下，用于测量在躯体感觉和前庭刺激联合时的 SPV。与其他三种条件相比，躯体感觉+前庭条件下的平均 SPV 值显着增加。与对照和前庭条件相比，躯体感觉和躯体感觉+前庭条件下的 SPV 绝对值显着增加。与其他条件相比，前庭条件下的平均或绝对 SPV 值没有显着差异。当干扰躯体感觉信息或干扰躯体感觉+前庭信息时，SPV 误差没有显着差异。当干扰座椅的躯体感觉信息时，SPV 误差增加，并且在前庭感觉信息调制的影响下也会发生移位。这些结果表明，健康成年人的座椅躯体感觉信息在 SPV 中起重要作用。
