With a visual memory of where our hands are, their perceived location drifts. We investigated whether the perceived location of one hand or the spacing between two hands drifts in the absence of visual memories or cues. In 30 participants (17 females, mean age 27 years, range 20–45 years), perceived location of the right index finger was assessed when it was 10 cm to the right or left of the midline. Perceived spacing between the index fingers was assessed when they were spaced 20 cm apart, centred on the midline. Testing included two conditions, one with ten measures at 30 s intervals and another where a 3 min delay was introduced after the fifth measure. Participants responded by selecting a point on a ruler or a line from a series of lines of different lengths. Overall, participants mislocalised their hands closer to the midline. However, there was little to no drift in perceived index finger location when measures were taken at regular intervals (ipsilateral slope: 0.073 cm/measure [\(-0.014\) to 0.160], mean [99% CI]; contralateral slope: 0.045 cm/measure [\(-0.033\) to 0.120]), or across a 3 min delay (ipsilateral: (\(-0.47\) cm [\(-1.11\) to 0.17]; contralateral: \(-0.44\) cm [\(-1.12\) to 0.24]). There was a slight drift in perceived spacing when measures were taken at regular intervals (slope: \(-0.15\) cm/measure [\(-0.29\) to \(-0.01\)]), but none across a 3 min delay (0.08 cm [\(-1.08\) to 1.24]). Thus, proprioceptive-based perceptions of where our hands are located or how they are spaced drift minimally or not at all, indicating these perceptions are stable.

通过视觉记忆我们的手，他们的感知位置会漂移。我们调查了在没有视觉记忆或提示的情况下，一只手的感知位置或两只手之间的距离是否漂移。在30名参与者中（17名女性，平均年龄27岁，范围20-45岁），当右食指距中线左右10 cm时，评估了右手食指的感知位置。当食指以中线为中心间隔20 cm时，评估食指之间的感知距离。测试包括两个条件，一个条件以30 s的间隔进行十次测量，另一个条件是在第五个测量后延迟3分钟。参与者通过从一系列不同长度的线中选择标尺或一条线作为响应。总体而言，参与者将手放错了位置，使其更接近中线。然而，\（-0.014 \） 到0.160]，平均值[99％CI]；对侧斜率：0.045厘米/度量[ \（ - 0.033 \） 至0.120]），或跨越3分钟延迟（同侧：（\（ - 0.47 \） 厘米[ \（ - 1.11 \） 0.17];对侧：\ （-0.44 \）  cm [ \（-1.12 \）到0.24]）。以规则的间隔进行测量时，感知到的间距略有漂移（坡度：\（-0.15 \） cm / measure [ \（-0.29 \） 到 \（-0.01 \） ]），但没有经过3分钟的延迟（0.08厘米[ \（-1.08 \）到1.24]），因此，基于本体感受的感知是我们的手位于何处或如何间隔漂移很小或根本没有，表明这些感觉是稳定的。