Nakamura T, Bronstein A M
Medical Research Council Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, UK.
Neuroreport. 1993 Mar;4(3):237-9. doi: 10.1097/00001756-199303000-00002.
A new technique for the assessment of cervical afferent function is described. It is based on the perception of trunk rotation around the earth-fixed head and assessed by the accuracy of eye saccades in the direction of trunk displacement. It was found that normal subjects were able to locate trunk position accurately (mean error 15%), independently of trunk displacement amplitude (10-40 degrees) or velocity (5-40 degrees s-1). It is concluded that normal man has accurate perception of trunk rotation and that neck-spinal afferents carry a tonic signal with efficient access to the ocular motor system. A patient with absent vestibular function showed identical results to those of normal subjects; this suggests that the enhancement of the cervico-ocular reflex observed in such patients is not mediated by an increase in neck-spinal afferent sensitivity.
本文描述了一种评估颈传入功能的新技术。该技术基于对绕固定于地球的头部的躯干旋转的感知，并通过眼扫视在躯干位移方向上的准确性进行评估。研究发现，正常受试者能够准确确定躯干位置（平均误差15%），与躯干位移幅度（10 - 40度）或速度（5 - 40度/秒）无关。结论是，正常人对躯干旋转有准确的感知，并且颈脊髓传入神经携带一种能有效接入眼动系统的紧张性信号。一名前庭功能缺失的患者表现出与正常受试者相同的结果；这表明在这类患者中观察到的颈眼反射增强并非由颈脊髓传入神经敏感性增加介导。
