Vibrotactile thresholds at the fingertip, volar forearm, large toe, and heel
Vibrotactile thresholds at the fingertip, volar forearm, large toe, and heel
复制标题
指尖、前臂掌侧、大脚趾和脚跟处的振动触觉阈值
DOI：
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发表时间：
2008
影响因子：
0.9
通讯作者：
M. Griffin
中科院分区：
文献类型：
--
作者：
M. Morioka;D. J. Whitehouse;M. Griffin
由于有毛和无毛皮肤中触觉通道的组织以及受体密度的变化，感知振动的阈值随身体上的位置而变化。本研究确定了振动阈值在四个位置上的身体与两个不同的接触器，以帮助识别的触觉通道确定在每个位置的阈值。用两个接触器在食指的远节指骨、掌侧前臂、大脚趾和脚跟上测量8至250 Hz六个频率下的振动触觉阈值：（i）直径为1 mm的圆形探针，其与固定的圆形环绕物（即，7.1-mm 2激发面积），和（ii）与固定的圆形环绕物具有2-mm间隙的6-mm直径的圆形探针（即，79-mm 2激发面积）。在所有频率和两种接触器下，指尖上的阈值均低于前臂掌侧、大脚趾和脚跟上的阈值，这与指尖处机械感受器的更大密度一致。在高频（63、125和250 Hz）下，较大接触器的阈值低于指尖、大脚趾（250 Hz除外）、脚跟（所有频率）和掌侧接触器的阈值。前臂250 Hz。它的结论是，至少有两个触觉通道（Pacinian从63到250 Hz，和非Pacinian从8到31.5 Hz）确定在指尖的振动触觉阈值，而非Pacinian通道有一个占主导地位的影响，在手掌前臂的振动触觉阈值。环层通道和非环层通道的作用在大脚趾或足跟处无法确认，尽管有一些空间总和的证据。
Thresholds for the perception of vibration vary with location on the body due to the organization of tactile channels in hairy and non-hairy skin, and variations in receptor density. This study determined vibration thresholds at four locations on the body with two different contactors so as to assist the identification of the tactile channel determining the threshold at each location. Vibrotactile thresholds at six frequencies from 8 to 250 Hz were measured on the distal phalanx of the index finger, the volar forearm, the large toe, and the heel with two contactors: (i) a 1-mm diameter circular probe with a 1-mm gap to a fixed circular surround (i.e., 7.1-mm2 excitation area), and (ii) a 6-mm diameter circular probe with a 2-mm gap to a fixed circular surround (i.e., 79-mm2 excitation area). At all frequencies and with both contactors, thresholds on the fingertip were lower than thresholds on the volar forearm, the large toe, and the heel, consistent with a greater density of mechanoreceptors at the fingertip. Thresholds with the larger contactor were lower than thresholds with the smaller contactor on the fingertip at high frequencies (63, 125, and 250 Hz), on the large toe (except at 250 Hz), on the heel (at all frequencies), and on the volar forearm at 250 Hz. It is concluded that at least two tactile channels (Pacinian from 63 to 250 Hz, and non-Pacinian from 8 to 31.5 Hz) determined vibrotactile thresholds at the fingertip, whereas non-Pacinian channels had a dominant influence on vibrotactile thresholds at the volar forearm. The role of Pacinian and non-Pacinian channels could not be confirmed at the large toe or the heel despite some evidence of spatial summation.
影响因子：
2.5
作者：
BOLANOWSKI, SJ;VERRILLO, RT
通讯作者：
VERRILLO, RT
影响因子：
2.4
作者：
BOLANOWSKI, SJ;GESCHEIDER, GA;CHECKOSKY, CM
通讯作者：
CHECKOSKY, CM
影响因子：
2.5
作者：
EDIN, BB;ABBS, JH
通讯作者：
ABBS, JH