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目的 :研究松果体内神经纤维终末同松果体细胞间的联系方式。方法 :取 1 2只成年雄性SD大鼠浅松果体 ,作常规电镜包埋 ,电镜下等距随机选点观察拍照并作形态定量测试。结果 :(1 )松果体细胞体积约占松果体体积的75 .9%± 3 .8( X±S x) ,松果体细胞间隙和血管周围间隙体积占整个松果体体积的 2 2 .0 %± 3 .5 ;在血管周围间隙中松果体细胞游离面表面积占松果体细胞整个界面面积的 46% ;(2 )松果体细胞的球状突起轮廓数共计数 1 5 5个 ,其中 1 0 1个游离在血管周围间隙内 ;(3 )共计数各种类型的神经纤维终末轮廓数 2 48个 ,其中 2 2 1个游离在血管周围间隙内 ,2 3个与松果体细胞胞体相贴 ,1个与细胞突起相贴 ,3个与松果体细胞形成突触。结论 :提示进入松果体的交感神经纤维终末对松果体细胞活动的调控主要是通过神经体液途径。
Objective: To study the relationship between pineal body terminals and pineal cells. Methods: Twenty pineal bodies of adult male Sprague-Dawley rats were randomly divided into two groups: control group, normal electron microscope and electron microscope. Results: (1) The volume of pineal cells accounted for about 75.9% ± 3.8 (X ± S x) of the volume of pineal gland, the volume of pineal cells and perivascular space accounted for 2 2 .0% ± 3. 5; In the perivascular space, the surface area of free surface of pinealocyte accounted for 46% of the total interface area of pinealocyte; (2) The number of globular projections of pineal cells was 15 5 , Of which 1 0 1 free space in the perivascular; (3) total number of nerve fibers of various types of terminal contours of 2 48, of which 2 2 1 free in the perivascular space, 23 and pineal Somatic cell body paste, a stick with the cell protrusions, and three pineal cells to form synapses. CONCLUSIONS: It is suggested that the regulation of the activity of pineal gland cells by the terminals of sympathetic nerve fibers into the pineal gland is mainly through the neurohumoral fluid pathway.