PDF(Pubmed)
Abstract：
UNASSIGNED: Hand postural physiological tremor increases during arithmetic computation. The present work aims at investigating whether this could be attributed to a raise in stress for having to provide a correct answer within a constrained period of time, or to voice vibration for having to speak to report the answer.
UNASSIGNED: In 16 participants tremor was recorded by using a 3-axial accelerometer during 5 min of a hand postural task performed simultaneously while: 1) subtracting 13 from a 3-digit number within 4 s and with mistakes correction (intervention: math stress task), 2) same as for the \"intervention task\" but without time limit and mistakes correction (intervention: math nonstress task), 3) adding 1 to a 3-digit number (intervention: voice vibration task), and 4) only postural task while keeping quiet (control task). Electromyographic (EMG) activity from the extensor carpi radialis was measured during the hand postural task.
UNASSIGNED: Compared to control, tremor increased during both math interventions (+30.9 % p = 0.002, math stress; +15.0 % p = 0.01, math nonstress), but not during the voice vibration task (+12.2 % p = 0.239). During the math stress trial tremor was greater compared to both the voice vibration trial (+21.0 % p = 0.021), and the math nonstress trial (+13.5 % p = 0.01). EMG activity was not affected.
UNASSIGNED: The results suggest that during arithmetic computation the \"stress component\" contributes only partially to the observed increase in hand postural tremor, and that this increase cannot be attributed to voice vibrations.
UNASSIGNED: In 16 participants tremor was recorded by using a 3-axial accelerometer during 5 min of a hand postural task performed simultaneously while: 1) subtracting 13 from a 3-digit number within 4 s and with mistakes correction (intervention: math stress task), 2) same as for the \"intervention task\" but without time limit and mistakes correction (intervention: math nonstress task), 3) adding 1 to a 3-digit number (intervention: voice vibration task), and 4) only postural task while keeping quiet (control task). Electromyographic (EMG) activity from the extensor carpi radialis was measured during the hand postural task.
UNASSIGNED: Compared to control, tremor increased during both math interventions (+30.9 % p = 0.002, math stress; +15.0 % p = 0.01, math nonstress), but not during the voice vibration task (+12.2 % p = 0.239). During the math stress trial tremor was greater compared to both the voice vibration trial (+21.0 % p = 0.021), and the math nonstress trial (+13.5 % p = 0.01). EMG activity was not affected.
UNASSIGNED: The results suggest that during arithmetic computation the \"stress component\" contributes only partially to the observed increase in hand postural tremor, and that this increase cannot be attributed to voice vibrations.
摘要：
■手姿势生理震颤在算术计算期间增加。目前的工作旨在调查这是否可以归因于压力的增加，因为必须在有限的时间内提供正确的答案，或因不得不说话来报告答案而发出的声音振动。
■在16名参与者中，在同时执行手部姿势任务的5分钟内使用3轴加速度计记录了震颤，同时：1）从4秒内的3位数数字中减去13并进行错误纠正（干预：数学压力任务），2）与“干预任务”相同，但没有时间限制和错误纠正（干预：数学无压力任务），3）将1添加到3位数字（干预：语音振动任务），和4）只有姿势任务，同时保持安静（控制任务）。在手姿势任务中测量了radi伸肌的肌电图（EMG）活动。
■与对照相比，在两种数学干预期间，震颤都有所增加（+30.9%p=0.002，数学压力；+15.0%p=0.01，数学非压力），但不是在语音振动任务（+12.2%p=0.239）。在数学压力试验中，与语音振动试验相比，震颤更大（+21.0%p=0.021），和数学无压力试验(+13.5%p=0.01)。EMG活动未受影响。
■结果表明，在算术计算过程中，“应力分量”仅对观察到的手部姿势性震颤的增加有部分贡献，这种增加不能归因于声音振动。
■在16名参与者中，在同时执行手部姿势任务的5分钟内使用3轴加速度计记录了震颤，同时：1）从4秒内的3位数数字中减去13并进行错误纠正（干预：数学压力任务），2）与“干预任务”相同，但没有时间限制和错误纠正（干预：数学无压力任务），3）将1添加到3位数字（干预：语音振动任务），和4）只有姿势任务，同时保持安静（控制任务）。在手姿势任务中测量了radi伸肌的肌电图（EMG）活动。
■与对照相比，在两种数学干预期间，震颤都有所增加（+30.9%p=0.002，数学压力；+15.0%p=0.01，数学非压力），但不是在语音振动任务（+12.2%p=0.239）。在数学压力试验中，与语音振动试验相比，震颤更大（+21.0%p=0.021），和数学无压力试验(+13.5%p=0.01)。EMG活动未受影响。
■结果表明，在算术计算过程中，“应力分量”仅对观察到的手部姿势性震颤的增加有部分贡献，这种增加不能归因于声音振动。
