Universidade de São Paulo, Faculdade de Medicina, Departamento de Otorrinolaringologia, São Paulo, SP, Brazil.
Universidade Estadual de Campinas (UNICAMP), Departamento de Otorrinolaringologia, Campinas, SP, Brazil.
Braz J Otorhinolaryngol. 2022 Nov-Dec;88 Suppl 1(Suppl 1):S91-S96. doi: 10.1016/j.bjorl.2021.04.006. Epub 2021 May 7.
Vestibular recruitment is a sign of hyperexcitability of central vestibular neurons and may be characteristic of peripheral vestibular damage.
To define the post-caloric recruitment index and its ability to predict the stage of vestibular compensation and peripheral lesion.
First of all, we demonstrated that larger values in the cold post-caloric stimulation compared to warm stimulation were equivalent to vestibular recruitment observed during the sinusoidal harmonic acceleration test. In the next step, patients with vestibular complaints and asymptomatic controls were submitted to the caloric test. We calculated post-caloric recruitment index for the control group. Among the study group, we analyzed the relation between post-caloric recruitment and unilateral weakness as well as the types of vestibular diagnoses.
Mean post-caloric recruitment was 17.06% and 33.37% among the control and study group, respectively. The ratio between post-caloric recruitment and unilateral weakness was 1.3 in the study group. Among recruiting subjects, no significant difference of unilateral weakness from the lesioned or healthy side was observed. We found no differences in vestibular diagnoses between recruiting and non-recruiting subjects.
Post-caloric recruitment index identified asymmetric vestibular tonus and central compensation. The normal value was established at 17.06%.
前庭募集是中枢前庭神经元过度兴奋的标志，可能是外周前庭损伤的特征。
定义冷后热刺激的募集指数及其预测前庭代偿和外周病变阶段的能力。
首先，我们证明与热刺激相比，冷后热刺激中较大的值相当于在正弦谐波加速测试中观察到的前庭募集。在下一步中，有前庭主诉的患者和无症状对照者接受了冷热测试。我们为对照组计算了冷后募集指数。在研究组中，我们分析了冷后募集与单侧无力以及前庭诊断类型之间的关系。
对照组和研究组的平均冷后募集分别为 17.06%和 33.37%。研究组冷后募集与单侧无力的比值为 1.3。在募集组中，未观察到患侧与健侧单侧无力的显著差异。我们没有发现募集组和非募集组在前庭诊断方面有差异。
冷后募集指数可识别不对称的前庭张力和中枢代偿。正常值设定为 17.06%。
