Balogun J A
Department of Physical Therapy, Russell Sage College, Troy, NY 12180.
J Sports Med Phys Fitness. 1991 Dec;31(4):521-6.
This investigation examined the effects of ramp time on the current intensity needed to elicit sensory, motor and pain tolerance response. Forty-seven healthy subjects were randomly divided into three groups. Subjects in group one (no. 17), group two (no. 15), and group three (no. 15) had the onset (ramp time) knob present at 1.0, 3.5 and 5.0 seconds, respectively. Subsequently, the wrist and finger flexors of the dominant hand were stimulated following standardized instructions. For each subject, the current intensity needed to elicit: (1) the sensory response, (2) minimum perceptible contraction, and (3) the maximum tolerance level of painful stimulation was determined. Significant F ratio was found for the current intensity at different perceptual level (p less than 0.5) but not for ramp time (p greater than .05). The findings suggest that with the stimulator used in this study, ramp time has no effect on the three basic excitatory responses, i.e., thresholds of sensory, motor and painful stimulation.
本研究探讨了斜坡时间对引发感觉、运动和疼痛耐受反应所需电流强度的影响。47名健康受试者被随机分为三组。第一组（17人）、第二组（15人）和第三组（15人）的起始（斜坡时间）旋钮分别设置为1.0秒、3.5秒和5.0秒。随后，按照标准化指导对优势手的腕部和手指屈肌进行刺激。对于每名受试者，确定引发以下反应所需的电流强度：（1）感觉反应，（2）最小可感知收缩，以及（3）疼痛刺激的最大耐受水平。在不同感知水平下，电流强度存在显著的F比率（p小于0.5），但斜坡时间不存在显著差异（p大于0.05）。研究结果表明，使用本研究中的刺激器时，斜坡时间对三种基本兴奋反应，即感觉、运动和疼痛刺激阈值没有影响。
