SIGNIFICANCE OF ANGIOGRAPHIC ABSENCE OF LEFT ANTERIOR DESCENDING CORONARY ARTERY IN A LEFT VENTRICLE WITH INTACT ANTERIOR WALL

Fifteen patients having total occlusion of the proximal left anterior descending coronary artery were studied. All fifteen had normal left ventricular anterior walls. The electrocardiogram was normal in eight patients; old inferior wall infarction was evident in one; anterior ischemia in five; and left anterior hemiblock in one. Collateral circulation was found in twelve patients (80%). These findings suggest that an angiographically non-visualized left anterior descending (LAD) vessel is patent and bypassable in patients where the anterior ventricular wall is intact, thus representing an additional criterion for aortocoronary bypass surgery.     

THE SYNDROME OF PROXIMAL JEJUNAL LOOP OBSTRUCTION FOLLOWING ANTERIOR GASTRIC RESECTION

An occasional complication following subtotal gastric resection of the antiperistaltic, antecolic type is closed loop obstruction high in the intestine. Unless recognized and treated early, it causes death rather quickly. Prompt surgical intervention is life-saving.Symptoms which characterize the complication and distinguish it from other forms of high intestinal obstruction or stomal edema are (1) unrelenting epigastric or left upper quadrant pain and tenderness attended by clinical indication of shock, and (2) rather limited vomiting with absence of bile and small bowel contents in the vomitus.Five cases occurred in a series of some 500 anterior long loop anastomoses. In three cases the complication was not immediately recognized and the patients died. In the other two cases, recovery followed surgical intervention.     

鲤科鱼类前方椎体的形成及其在系统发育上的意义

本文对九种鲤科鱼类与中国胭脂鱼幼体的前方椎体的发育进行了比较。观察结果表明这两个科鱼类的前方椎体发育是近似的,它们的魏氏小骨有共同的来源;魏氏复合骨由前方椎体上方的第二骨化中心形成,这个骨化中心与第三和第四上神经骨相当。另一方面,胭脂鱼幼体的第二椎体副突已与第四椎体的胸肋相接;魏氏复合骨的扩展是骨化中心背脊部均匀地发生的,这些与鲤科有着明显的不同。鲤科幼体的魏氏复合骨发育具有共同的特点,第二骨化中心的前方有一棘状物在早期出现,它代表了第三上神经骨伸出部份。但随后的发育可以区分为两种不同方式:一种为雅罗系鱼类所具有,即第二骨化中心以棘状物的扩展为主,前、后棘存在并有缝合线相连;另一种为鲃系鱼类所有,即第二骨化中心的发育以其背中部伸出的实心嵴突为主,仅有不发达的前棘,此系属于派生性结构。与魏氏复合骨相关的是2—3椎体间的关系也有相应的差别:雅罗系鱼类的幼体其2—3椎体间分离(仅鳑(鱼皮)亚科鱼类例外),而鲃系鱼类的幼体其2—3椎体愈合。由于幼体魏氏复合骨与椎体的特征比成体表现更为明显,它们在系统发育上能提供更为清楚的信息。     

电刺激大鼠扣带前回对血压和心率的影响

电刺激大鼠扣带前回(ACg),血压升高,心率加快,同时缰核(Hb)内20.7％的神经元兴奋,22.4％的神经元抑制,56.9％的神经元无反应。双侧Hb内微量注射盐酸利多卡因,可明显阻断电刺激ACg引起的心血管反应。结果表明,ACg对心血管活动的调节,一部分是通过改变Hb的活动来实现的,Hb是ACg调节心血管活动的下行性通路之一。     

牵拉左心房和夹闭颈总动脉对猫下丘脑前部和后部单位放电的影响

在40只氯醛糖和乌拉坦麻醉的猫,观察了牵拉左心房肺静脉入口处(atrial stretch,AS)和关闭一侧颈总动脉(carotid occlusion,CO)对下丘脑前部(AH)和下丘脑后部(PH)单位放电的影响。共记录了185个自发放电单位。对 AS 有反应的 AH 和 PH 单位分别为46.3%和23.3%,其中均以出现抑制反应者居多。有少数单位仅在 AS 开始和停止时出现短暂的兴奋反应。在上述185个神经元中观察了85个对 AS 和 CO 两种刺激的反应,有15个(17.6%)对两种刺激均反应,其中被 AS 所抑制而为 CO 所兴奋的有11个,占73.3%(11/15)。这些结果表明:(1)AS 可对 AH 神经元活动起抑制作用;(2)AS 也可影响 PH 神经元活动;(3)动脉压力感受性和心房容量感受性刺激可会聚于同一下丘脑神经元。     

PARA-ARTICULAR FUSION OF THE PROXIMAL INTERPHALANGEAL JOINT OF THE HAND

The para-articular procedure for the arthrodesis of an interphalangeal joint is more reliable, rapid and simpler than intra-articular fusion. The position is easily maintained, and therefore one has no difficulty with approximating the flexion and rotational angles. Since a large dead space is not produced in carrying out the procedure, use of a compressing force for adequate surface contact is not necessary. Shortening of the finger is not a hazard. A Kirschner wire is used in the technique described, which gives good protection for the graft and keeps the joint in the desired position without distracting the surfaces during the bony resorption at the joint.     

蜜蜂下行神经元的光谱特性

利用生理细胞外记录方法研究了蜜蜂下行神经元的光谱敏感特性,不同波长的单色光刺激引起的给先反应和撤光反应的相对强度不同．分析了３７例下行神经元的光谱敏感特性,发现下行神经元有的是光谱宽带和多光谱性的,有的是光谱窄带,给光和撤光反应都具有不同的最敏感区。