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第二节抑制性活动什么是抑制性的活动? 上节已述过,由於内外界的刺激作用於机体后可唤起与这些刺激相适应的反应;如对食物刺激唤起唾液分泌,便是兴奋性的活动。但并非一切刺激作用於机体后都能唤起积极的活动。由於刺激的强度和条件的不同,刺激往往亦可以使机体的活动终止。例如在实验正在进行着的阳性条件反射,可因一突然外界刺激而中止;又如在刺激蛙腿时可引起屈曲反射以逃避刺激,但如果用食盐的结晶放在蛙的中脑,再刺激其下腿时,就不出现任何反应;又如在进行中的条件反射,如反覆给条件刺激并不给食物强化时,唾液便渐渐停止了分泌,以致动物陷入睡眠状态。在人类也往往看到在听乏味讲话时往往
The second section of inhibitory activity What is inhibitory activity? As mentioned in the previous section, due to internal and external stimuli on the body can evoke the response to adapt to these stimuli; such as stimulating saliva secretion of food stimulation is excitability activity. However, not all stimuli act on the body to evoke positive activity. Due to the different stimulus intensity and conditions, stimulation often can also make the body’s activity stop. For example, positive ophthalmic reflexes undergoing an experiment may be stopped by a sudden external stimulus. Another example is the stimulation of the frog legs to induce buckling reflexes to avoid stimuli. However, if salt crystals are placed on the frog’s midbrain and then stimulated The lower leg, there is no reaction; Another example is the ongoing conditioning, such as repeated conditions to stimulate the food does not strengthen, the saliva will gradually stop the secretion, so that animals fall asleep. Often, humans often see hearing boring speech