大核

Objective To investigate the technique in stereotactic median preoptic nucleus of rats.

目的探讨大鼠正中视前核立体定位的技术关键。

The choleratoxin B labelled cells distributed in the lateral hypothalamic area,the lateral preoptic area and the arcuate nucleus.

免疫组织化学染色显示，在大鼠下丘脑外侧区、外侧视前区和弓状核都可见CTb标记免疫阳性神经元。

The result indicates that the decrease of potassium channel function in aged rat cochlear nucleus may be related to presbycusis.

移植的老年大鼠耳蜗核钾离子通道功能的下降可能与老年性聋的发病有关。

The small granulocytes, with an average diameter of 12 .82±1.54 μm and appearance of short pseudopodia, have a large number of small and homogeneous basophilic cytoplasmic granules.

m，胞质中仅含有少量颗粒，细胞核对台盼蓝呈阳性反应，核质比较大；小颗粒细胞约占血细胞总数的50.7%，平均直径为12.82±1.54？

The observation with histomorphology and phase contrast microscope: osteoclasts were large in size, multinucleus, foam-like cytoplasm with vacuole and pseudopodia, and movable. Acid Phosphatase reaction is positive.

经组织形态学、光镜和相差显微镜观察，破骨细胞具有胞体大，多核，胞浆泡沫状间有空泡，胞浆有伪足样突起，并可移动，酸性磷酸酶反应阳性。

While the tissue spaces surrounding a few blood vessels wasAl and Fg positive,no Al or Fg positive cells were observed.In antemortem injurygroup,diffuse subarachnoid hemorrhage,cerebral edema,swelling or pyknotic neu-rons could be observed.The axons showed irregular swelling and disconnection at1～3h,marked swelling and disconnection at 6h,and retraction ball at 15h whichwas more remarkable at 24h after injury.The space between myelin sheaths andaxons was increased at 3～6h after injury.Tortuous and wavelike myelin sheathswhich adhered on axons incompletely,or even peeled off could be found from 15hto 24h after injury.Perinuclear lysis of Nissl bodies began at 24h after injury.Thenumber of GFAP positive cells in cerebrum and brain-stem increased significantlyfollowed by decrease,and then increased again,but the time courses of the changesin different areas of brain were not same.Al and Fg positive neural cells,mainlysurrounded blood vessels,with diffuse or peripherally distributed positive matter incytoplasm could be observed at 0.5h after injury.The number of Al or Fg positivecells and the intensity of immunoreaction increased with the time of injury.The areaof SYN positivity in medulla oblongata and pons decreased notably 3～6h afterinjury,then return to normal levels and continued to 24h after injury.

生前损伤组，可见广泛蛛网膜下腔出血，脑组织水肿，神经细胞肿胀，晚期神经元固缩；伤后1～3h见部分神经轴突不规则增粗、断裂，伤后6h断端膨大，伤后15h可见收缩球，至伤后24h更为明显；伤后3～6h可见部分神经髓鞘与轴突之间的间隙增宽，伤后15h髓鞘明显曲折，不完全附着在轴突两侧，甚至剥脱，持续到伤后24h；核周尼氏体减少在伤后24h才开始出现；同一部位的GFAP阳性细胞数目随损伤时间发生改变，先增多（最早在伤后0.5h），达到高峰后减少，其后又有增多趋势，但不同部位的GFAP阳性细胞数目增减的时间过程不尽相同，同时，大脑中的GFAP阳性细胞数目也有改变；伤后0.5h，可在脑干组织中见到Al和Fg阳性神经细胞，主要位于血管周围，阳性物在胞浆中呈弥散性分布，但部分细胞的阳性物仅分布于靠近胞膜的胞浆中而呈环状，随损伤时间延长，阳性细胞数目增多，反应强度增加；伤后3～6h，延髓及桥脑中的SYN阳性物面积减少，其后恢复到正常水平，并持续到伤后24h。

The organization structure of experimental group was disorganized, cracked and the bone trabecula was rarefactive and non-intact and there was a great number of empty lacuna in bone trabecula. While there was the reverse situation in the control group .

结果实验组组织结构紊乱，破碎，骨小梁稀疏、不完整，有量的空骨陷窝，而对照组骨小梁相对较完整、排列整齐，骨小梁中的骨细胞清晰可见，核大，位于中央。

ResultThe organization structure of experimental group was disorganized, cracked and the bone trabecula was rarefactive and non-intact and there was a great number of empty lacuna in bone trabecula. While there was the reverse situation in the control group .

结果实验组组织结构紊乱，破碎，骨小梁稀疏、不完整，有大量的空骨陷窝，而对照组骨小梁相对较完整、排列整齐，骨小梁中的骨细胞清晰可见，核大，位于中央。

Resultthe organization structure of experimental group was disorganized, cracked and the bone trabecula was rarefactive and non-intact and there was a great number of empty lacuna in bone trabecula.

结果实验组组织结构紊乱，破碎，骨小梁稀疏、不完整，有大量的空骨陷窝，而对照组骨小梁相对较完整、排列整齐，骨小梁中的骨细胞清晰可见，核大，位于中央。

Resumptively, the levels of c-Fos expression increased during the beginning time of RWIS and reached a maximum at 60min of stress.

总体来说，应激60 min时大鼠脑干和脊髓中Fos表达达到顶峰，但具体到每个核团，又稍有差别。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失