Clark F J, Burgess R C, Chapin J W
Brain. 1986 Dec;109 ( Pt 6):1195-208. doi: 10.1093/brain/109.6.1195.
Proprioceptive ability with the proximal interphalangeal (PIP) and metacarpophalangeal (MCP) joints of the index finger in human subjects was examined using a method that could assess static-position sense independently of movement sense (Clark et al., 1985). The similarity in location and function of these joints would suggest similar proprioceptive mechanisms, but proprioceptive ability was found to be quite different for the two joints. The method of distinguishing a static-position sense from a movement sense was based on whether a subject's ability to detect a small change in joint position was impaired when the rate of rotation was progressively reduced. An awareness of static-position should not depend on the rate at which a joint is placed into position. However, if subjects use movement signals to detect changes in joint position, slowing the rate of displacement should reduce the intensity of these signals and make the displacements more difficult to detect. This method indicated a static-position sense with the MCP joint but only a movement sense with the PIP joint. It was confirmed that sensory input from regions of skin not stretched or deformed by rotation of the joint can influence proprioceptive sensibility with the fingers. Anaesthesia of the tip of the index finger or of the thumb blunted subject's perceptions of movement of the PIP joint of the index finger. However, anaesthesia of the PIP joint itself had no observable effect on the ability to sense movement of the joint.
采用一种能够独立于运动觉评估静态位置觉的方法，对人体受试者食指近端指间关节（PIP）和掌指关节（MCP）的本体感觉能力进行了检测（Clark等人，1985年）。这些关节在位置和功能上的相似性表明可能存在相似的本体感觉机制，但研究发现这两个关节的本体感觉能力有很大差异。区分静态位置觉和运动觉的方法是基于当旋转速度逐渐降低时，受试者检测关节位置微小变化的能力是否受损。对静态位置的感知不应取决于关节进入某个位置的速度。然而，如果受试者利用运动信号来检测关节位置的变化，减慢位移速度会降低这些信号的强度，使位移更难被检测到。该方法表明MCP关节存在静态位置觉，而PIP关节仅存在运动觉。研究证实，来自未因关节旋转而拉伸或变形的皮肤区域的感觉输入会影响手指的本体感觉灵敏度。食指指尖或拇指麻醉会减弱受试者对食指PIP关节运动的感知。然而，PIP关节本身麻醉对关节运动感觉能力没有明显影响。
