The coding of roughness
The coding of roughness
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DOI：
10.1037/cjep2007020
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发表时间：
2007-09-01
影响因子：
1.3
通讯作者：
Bensmaiea, Sliman J.
中科院分区：
文献类型：
--
作者：
Hollins, Mark;Bensmaiea, Sliman J.
这篇评论探讨了纹理的信息被捕获，编码和处理的体感系统产生的粗糙/光滑的感觉。空间周期超过约200 μ m的纹理在空间上被编码，因此粗糙度几乎与它们在皮肤上移动的速度和方向无关。这些信息由缓慢适应（SA 1）机械感受器之间活动的空间变化组成，似乎是由专门的皮层神经元提取的。感知更精细表面的粗糙度是由检测介导的，主要是由Pacinian传入，当纹理在皮肤上移动时产生的皮肤振动。运动是感知这些纹理所必需的，振动触觉适应干扰了它。代码是一个密集的代码（即，Pacinian传入神经的活动量）。
This review examines the way information about textures is captured, encoded, and processed by the somatosensory system to produce sensations of roughness/smoothness. Textures with spatial periods exceeding about 200 pm are encoded spatially, so roughness is nearly independent of the speed and direction of their movement across the skin. The information consists of spatial variations in activity among slowly adapting (SA1) mechanoreceptors, and appears to be extracted by specialized cortical neurons. Perception of the roughness of finer surfaces is mediated by detection, primarily by Pacinian afferents, of cutaneous vibrations generated when textures move across the skin. Movement is necessary to the perception of these textures, and vibrotactile adaptation interferes with it. The code is an intensitive one (i.e., the amount of activity in Pacinian afferents).