Suprachiasmatic nuclei influence circannual and circadian rhythms of ground squirrels.
Suprachiasmatic nuclei influence circannual and circadian rhythms of ground squirrels.
复制标题
视交叉上核影响地松鼠的昼夜节律。
DOI：
10.1152/ajpregu.1983.244.4.r472
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
Dark,J
中科院分区：
文献类型：
--
作者：
Zucker,I;Boshes,M;Dark,J
在恒定的光周期和温度条件下，金背地松鼠的视交叉上核（SCN）或内侧基底下丘脑持续病变。SCN的破坏消除或扰乱昼夜活动节律，缩短了年内生殖周期。在几个SCN病变的动物和一只松鼠有3至5个月的体重节奏，消除或中断的Circannual体重周期，然而，大多数SCN病变的松鼠与破坏昼夜活动周期表现出正常的circannual体重节奏。SCN是重要的昼夜节律组织的运动活动，这种昼夜啮齿动物，但产生和表达的昼夜体重和生殖节律可以进行在没有连贯的昼夜节律组织。SCN对昼夜节律周期的产生和表达的重要性低于昼夜节律周期
Golden-mantled ground squirrels, maintained under constant conditions of photoperiod and temperature sustained lesions of the suprachiasmatic nuclei (SCN) or of the medial basal hypothalamus. Destruction of the SCN eliminated or disrupted circadian activity rhythms and shortened the period of the circannual reproductive cycle. Circannual body weight cycles were eliminated or disrupted in several SCN-lesioned animals and one squirrel had a 3- to 5-mo body weight rhythm; however, most SCN-lesioned squirrels with disrupted circadian activity cycles manifested normal circannual body weight rhythms. The SCN are important for circadian organization of locomotor activity of this diurnal rodent, but the generation and expression of circannual body weight and reproductive rhythms can proceed in the absence of coherent circadian organization. The SCN are less essential for the generation and expression of circannual than of circadian cycles