Venkatesh D, Ramachandra D L, Baboo N Suresh, Rajan B K
M. V. J. Medical College and Research Hospital, Channasandra, Near Whitefield, Bangalore, 560 067.
Indian J Physiol Pharmacol. 2002 Jul;46(3):333-7.
The measure of visual reaction time has been used to evaluate the processing speed of Central Nervous System and the co-ordination between the sensory and motor systems. As the reaction time is influenced by different factors, the impact of psychological stress, gender effect and the colour of objects in modulating the reaction time have been investigated in this study. 32 male and 38 female medical students in the age group of 18-21 yrs participated as subjects. It was observed that a) the males had a visual reaction time lesser than their female counterparts b) response latency for green colour was lesser than that for red in both the males and the female subjects and c) psychological stress resulted in a significant decline in the reaction time to green colour in males. The longer reaction time in females could be due to the effect of female sex hormones, which reduced the velocity of nerve impulse and increased the synaptic delay. Green colour evoked a faster response due to its stronger stimulation on the visual receptors.
视觉反应时间的测量已被用于评估中枢神经系统的处理速度以及感觉和运动系统之间的协调。由于反应时间受不同因素影响，本研究调查了心理压力、性别效应和物体颜色对调节反应时间的影响。32名年龄在18 - 21岁的男性医学生和38名同龄女性医学生作为受试者参与研究。观察到：a)男性的视觉反应时间比女性短；b)男性和女性受试者对绿色的反应潜伏期均短于对红色的反应潜伏期；c)心理压力导致男性对绿色的反应时间显著下降。女性反应时间较长可能是由于女性性激素的作用，其降低了神经冲动速度并增加了突触延迟。绿色因其对视觉感受器的较强刺激而引起更快的反应。
