CEREBRAL LOCALIZATION FUNCTION FROM THE INPUT OF SINGLE MECHANORECEPTIVE UNITS IN MAN
CEREBRAL LOCALIZATION FUNCTION FROM THE INPUT OF SINGLE MECHANORECEPTIVE UNITS IN MAN
复制标题
DOI：
10.1111/j.1748-1716.1983.tb07338.x
复制
发表时间：
1983-01-01
期刊：
影响因子：
--
通讯作者：
OCHOA, JL
中科院分区：
文献类型：
--
作者：
SCHADY, WJL;TOREBJORK, HE;OCHOA, JL
本文用显微神经造影术和神经内微刺激（INMS）方法，在人的手和前臂上研究了单个机械感受性单位输入的脑定位功能的准确性。由INMS在阈振幅下诱发的感觉的投射场与激活单位的感受野之间的平均距离（场间距离或IFD）从指尖SA I单位的2.6 mm到前臂SA I单位的23.4 mm不等。一个不太明显的proximodistal IFD梯度被发现为更快的适应单位。每个皮肤区域的IFD值与通过直接在皮肤上进行点定位测试获得的IFD值相当。功能梯度存在于单一的机械感受性单位的输入，和刺激定位几乎没有改善时，许多单位共激活。
The accuracy of the cerebral localization function from the input of single mechanoreceptive units was studied in the hand and forearm of human subjects by means of microneurography and intraneural microstimulation (INMS). The mean distance separating the projected field of a sensation evoked by INMS at liminal amplitude from the receptive field of the activated unit (interfield distance, or IFD) varied from 2.6 mm for SA I units in the fingertips to 23.4 mm for SA I units in the forearm. A less pronounced proximodistal IFD gradient was found for quicker adapting units. IFD values for each skin region were comparable with those obtained by a point localization test directly on the skin. Functional gradients exist for inputs from single mechanoreceptive units, and stimulus localization hardly improves when numerous units are coactivated.