SENSORIMOTOR MECHANISMS IN WEIGHT DISCRIMINATION
SENSORIMOTOR MECHANISMS IN WEIGHT DISCRIMINATION
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DOI：
10.3758/bf03207502
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发表时间：
1984-01-01
期刊：
影响因子：
--
通讯作者：
ROSS, HE
中科院分区：
文献类型：
--
作者：
BRODIE, EE;ROSS, HE
利用二头肌的紧张性振动反射收缩来研究传入和传出信号在体重辨别中的作用。获得了2种提举状态(正常和反射)和2种静态状态(有无肌张力)的辨别阈值。正常提举比反射式提举有更好的辨别能力(实验1)。正常提举效果也优于两种静态状态(实验2)。在静态条件下，肌肉紧张剂的加入使人的辨别力更好。反射提举的阈值与肌张力静持的阈值相似，介于正常主动提举和静压的阈值之间。反射提升和压力感应阈值比以前的文献显示的要好得多。讨论了传出和传入对权重辨别的相对贡献。
The role of efferent and afferent signals in weight discrimination was investigated by using the tonic vibratory reflex contraction of the biceps muscle. Differential thresholds were obtained for 2 lifting conditions (normal and reflex) and 2 static conditions (with and without muscular tonus). Normal lifting gave finer discrimination than reflex lifting (experiment 1). Normal lifting was also superior to the 2 static conditions (experiment 2). Within the static conditions, the addition of muscular tonus gave finer discrimination. The reflex lifting condition gave thresholds similar to those for static holding with muscular tonus, lying between those for normal active lifting and those for static pressure. The reflex lifting and pressure-sensing thresholds were very much finer than the previous literature suggests. The relative contributions of efference and afference to weight discrimination are discussed.