丘脑网状核在大鼠睡眠-觉醒周期中的调节作用  被引量:6

Effect of nucleus reticularis,thalami on sleep-wakefulness cycle of rat

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作  者:张瑾[1] 李春华 汪凯[2] 王烈成[1] 张景行[1] 夏静[1] 

机构地区:[1]安徽医科大学生理教研室,合肥230032 [2]安徽医科大学第一附属医院神经内科,合肥230032 [3]南京军区空军司令部机关医院保健科

出  处:《中华行为医学与脑科学杂志》2009年第3期229-231,共3页Chinese Journal of Behavioral Medicine and Brain Science

基  金:安徽医科大学校青年科研基金(20052031)

摘  要:目的观察丘脑网状核(Rt)对大鼠睡眠-觉醒周期的影响。方法采用脑立体定位技术确定Sprague—Dawley大鼠双侧Rt插管位置并进行核团埋管,同时安装脑电和肌电电极用于记录大鼠皮层脑电活动和肌电活动。运用多导睡眠描记技术观察Rt内微量注射药物后大鼠睡眠一觉醒指标变化情况。结果Rt内微量注射L-谷氨酸(L—Glu)后与对照组比较觉醒时间增加[分别为(53.3±4.9)%,(40.9±5.3)%,P〈0.01],睡眠时间减少[分别为(46.7±4.9)%,(59.1±5.3)%,P〈0.01];而微量注射γ-氨基丁酸(GABA),环磷酸腺苷(cAMP)引起睡眠时间分别增加14.0%0=3.136,P〈0.01)和12.2%0=3.187,P〈0.01),觉醒时间分别减少20.3%(t=3.136,P〈0.01)和21.7%(t=3.003,P〈0.01)。Rt内微量注射吗啡引起觉醒时间增加[分别为(43.2±7.7)%,(32.6±6.1)%,P〈0.01],睡眠时间减少[分别为(56.8±7.7)%,(67.4±6.1)%,P〈0.01],而微量注射阿片受体阻断剂纳络酮可阻断吗啡的促觉醒作用(t=2.538,P〈0.05)。结论Rt参与大鼠睡眠一觉醒周期的调节,兴奋Rt可促进觉醒,抑制Rt可促进睡眠;并且Rt可能是阿片类物质参与睡眠调节的中枢靶区之一。Objective To observe effect of nucleus reticularis thalami (Rt) on sleep-wakefulness cycle of rat. Methods Two stainless steel cannulae were implanted into Sprague-Dawley rats' bilateral Rt by using brain stereotaxic technique. At the same time, four copper electrodes were screwed into the skull for electroencephalogram (EEG) recoding and two silver wires in the neck muscle for electromyogram (EMG) recording. After drugs were microinjected into Rt,sleep-wakefulness cycle was observed by polysomnography. Results Wakefulness was enhanced [(53.3±4.9) %,(40.9±5.3) %,P〈0.01] and sleep was reduced[(46.7±4.9) %,(59.1 ± 5.3 ) % , P 〈 0.01 ] after L-glutamate (L-Glu) was microinjected into Rt,while microinjection of γ-amino-butyric acid (GABA) and 3'-5'-cyclic adenosine monophosphate (cAMP) into Rt led to the opposite effects:sleep was increased by 14.0 % (t = 3. 136, P〈 0.01 ) , 12.2 % (t = 3. 187, P〈 0.01 ) and wakeful-hess was decreased by 20.3 % (t = 3. 136, P〈 0.01 ) ,21.7 % (t = 3. 003, P〈 0.01 ). Microinjection of morphine into Rt can enhance wakefulness[(43.2±7.7) %,(32.6±6.1) %, P〈0.01]and reduce sleep [ (56.8 ±7.7) %,(67.4± 6.1 ) % , P 〈 0.01 ] , whereas microinjection of naloxone, an opioid receptor antagonist, into Rt, abolished the effect of morphine completely (t = 2. 538, P 〈 0.05 ). Conclusion Rt plays an important role in regulating sleep and wakefulness. Excitement of Rt promotes wakefulness, while, inhibition of Rt causes sleep. Rt may be one of the sleep-regulatory sites of opioid-like substances.

关 键 词:丘脑网状核 大鼠 睡眠 觉醒 多导睡眠描记术 

分 类 号:R741[医药卫生—神经病学与精神病学]

 

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