摘要
用透射电镜研究了大鼠中脑导水管周围灰质(PAG)腹外侧区的正常亚显微结构。中脑导水管周围灰质腹外侧区神经元的胞体多为中型梭形,胞核呈椭圆形,常见核膜内陷,核仁清晰。胞浆内可见各种细胞器,有部分高尔基体呈环状或半环状。轴-体突触占此区突触总数的6％,以对称型为主(82％);轴-树突触占94％,其中对称型(66％)多于非对称型(34％)。也可见轴-树棘突触、平行突触和树突中心型突触球等特殊类型的轴-树突触。上述突触的前成分主要含透明圆形小泡,个别者以扁平形小泡为主,但多数含透明圆形小泡的轴突终末内混有扁平形小泡和颗粒囊泡。
The transmission electron microscopic technique was used in the present study to observe the normal ultrastructure of the ventrolateral subdivision (VLS) of the rat midbrain periaqueductal gray (PAG). Most of the neurons in the VLS of PAG had medium-sized fusiform neuronal cell body, ellipsoid nucleus and irregular nuclear membrane with deep invaginations or infoldings. The nucleolus was electron dense, large and spheroidal. There were many kinds of organelles in the cytoplasm and the Golgi apparatus in some cells were circular or semicircular. The percentage of axo-somatic synapse in total synapses in VLS was 6% and most of them was of symmetric type (82%). Axo-dendritic synapses counted 94%, of these 66% were symmetric type, 34% were asymmetric. Some special types of axo-dendritic synapse were observed. e. g., axo-spine synapse, parallel synapse, and central dendritic synaptic glomerulus. The synaptic vesicles in the presynaptic bags of the synapses mentioned above were mainly clear spherical in type, and most of the clear spherical vesicle-filled bags contained a few flattened vesicles and granular vesicles. Only a few bags were mainly filled with flattened vesicles.
出处
《解剖学报》
CAS
CSCD
北大核心
1992年第3期260-263,共4页
Acta Anatomica Sinica
关键词
腹外侧区
亚显微结构
大鼠
PAG
Midbrain periaqueductal gray
Ventrolateral subdivision
Submicroscopic structure
Rat
