Andersson G, Persson K, Melin L, Larsen H C
Department of Psychology, University Hospital, Uppsala, Sweden. Gerhard.
Acta Otolaryngol. 1998 Jul;118(4):461-5. doi: 10.1080/00016489850154568.
A group of patients with balance complaints (n = 16) was compared with a group of normal subjects (n = 17) by means of posturography, subjective assessments of balance, anxiety and unsteadiness when standing on a force platform with eyes closed. Postural instability was induced by vibratory stimulation of the calf muscles (20, 40, 60, 80 and 100 Hz). As a control condition, the arm (biceps) was stimulated at similar frequencies. In order to control for arousal, blood pressure and heart beat were assessed. Furthermore, questionnaire responses on psychological measures were collected. Results showed clear differences between the groups in terms of imbalance and self-reports. However, the 2 groups displayed similar increases of imbalance during calf stimulation and no increase during arm stimulation. Patients generally rated less increase of unsteadiness when the calf was stimulated than did the controls. No differences in arousal were found between the groups or within conditions. Results are discussed in terms of the proposed desynchrony between symptoms and complaints.
通过姿势描记法，对一组有平衡障碍主诉的患者（n = 16）和一组正常受试者（n = 17）进行了比较，在闭眼站立于测力平台时，对平衡、焦虑和不稳定程度进行主观评估。通过对小腿肌肉进行振动刺激（20、40、60、80和100赫兹）来诱发姿势不稳。作为对照条件，以相似频率刺激手臂（肱二头肌）。为了控制觉醒状态，评估了血压和心跳。此外，收集了关于心理测量的问卷回复。结果显示两组在失衡和自我报告方面存在明显差异。然而，两组在小腿刺激期间失衡增加相似，而在手臂刺激期间无增加。与对照组相比，患者在小腿受到刺激时通常评定不稳定程度增加较少。两组之间或在不同条件下未发现觉醒状态有差异。根据所提出的症状与主诉之间的不同步来讨论结果。
