Popova D I, Churnosov E V
Zh Evol Biokhim Fiziol. 1976 Mar-Apr;12(2):199-201.
In the diurnal activity of the frog R. temporaria, rest and awakefulness stages were investigated. Resting stage was differentiated into daily and nocturnal phases. During daily rest, plastic tone in neck muscles was registered. During this phase, the head might be subjected to unnatural position which is maintained for a certain period. The heart rate was minimal, respiration could not be recorded. During nocturnal rest, in contrast to daily one, the animal changed its positon when touched at the head and kept itself in this positon. Cardiac contractions exhibited evident rhythmicity. Sleep episodes were rare and occasional; they were accompanied by eye closing and relaxation of the body.
在欧洲林蛙的昼夜活动中，对休息和清醒阶段进行了研究。休息阶段分为日间和夜间阶段。在日间休息期间，记录到颈部肌肉的可塑性张力。在此阶段，头部可能会处于非自然位置并保持一段时间。心率最低，无法记录到呼吸。与日间休息相反，在夜间休息时，动物头部被触碰时会改变姿势并保持该姿势。心脏收缩表现出明显的节律性。睡眠发作很少且偶然出现；它们伴随着闭眼和身体放松。
