Faculty of Health Sciences, University of Ljubljana, Ljubljana, Slovenia.
PLoS One. 2013;8(2):e55360. doi: 10.1371/journal.pone.0055360. Epub 2013 Feb 5.
The purpose of this study was to evaluate the effect of additional light hand contact (F<1 N) in the region of the hypothenar eminence on forward movement of the center of pressure (COP) and dominant hand. Subjects sled their hypothenar eminence on a vertically-oriented pressure sensitive board while reaching forward beyond their arm length. In the two separate experiments forty nine healthy, college-aged volunteers participated in the study. Thirty subjects (mean age of 22.2±2.4 years, 6 male and 24 female) participated in the experiment on level ground and nineteen subjects (22±2.6 years, 5 male and 14 female) in the experiment on an elevated surface. The forward displacement of the COP was significantly larger (p = 0.002) when subjects were allowed to slide with the hand as compared to no contact when the activity occurred on level ground (84±10 mm and 79±11 mm, respectively), and on a one meter elevated surface (71±17 mm and 65±21 mm, respectively). The maximal forward reach of the dominant hand was significantly greater when subjects were allowed to slide with the hypothenar eminence as compared to the no contact condition on the level ground (336±35 mm and 344±38 mm, respectively, p<0.02), and on the one meter elevated surface (298±58 mm and 307±58 mm, respectively, p<0.01). This data indicate that subjects were able to use additional haptic information from the hypothenar region to bring their COP and dominant hand further forward while standing on level ground as well as on a one m elevated surface.
本研究的目的是评估在小鱼际区域额外施加轻触（F<1 N）对手心向前推动中心（COP）和优势手的影响。被试将小鱼际放在垂直的压力感应板上，然后伸展手臂向前。在两个单独的实验中，49 名健康的大学生志愿者参与了研究。30 名被试（平均年龄 22.2±2.4 岁，6 名男性和 24 名女性）在水平地面上进行实验，19 名被试（22±2.6 岁，5 名男性和 14 名女性）在 1 米高的平台上进行实验。与无接触相比，当被试在水平地面上允许手滑动时，COP 的向前位移明显更大（p = 0.002）（分别为 84±10 mm 和 79±11 mm），在 1 米高的平台上时（分别为 71±17 mm 和 65±21 mm）。与无接触相比，当被试在水平地面上允许手滑动时，优势手的最大向前伸展距离明显更大（分别为 336±35 mm 和 344±38 mm，p<0.02），在 1 米高的平台上时（分别为 298±58 mm 和 307±58 mm，p<0.01）。这些数据表明，被试能够利用来自小鱼际区域的额外触觉信息，在站立于水平地面以及 1 米高的平台上时，将其 COP 和优势手进一步向前推动。
