Pannese E, Gioia M, Carandente O, Ventura R
J Comp Neurol. 1983 Mar 1;214(3):239-50. doi: 10.1002/cne.902140302.
With a quantitative method and serial sections a study was carried out under the electron microscope of the perikaryal projections of the neurons in the thoracic spinal ganglia of cat and rabbit. These projections usually appear as finger-shaped evaginations which run roughly parallel to the surface of the nerve cell body. Their length ranges between 0.3 and 3.25 microns, and they show a nearly circular cross section with a rather uniform transverse diameter having an average value of about 0.2 microns. Both in cat and rabbit a very high correlation was found between the surface area of perikaryal projections and both the volume and smoothed surface area of the corresponding nerve cell body. Perikaryal projections increase the surface area of the nerve cell body by 43% in cat and 39.5% in rabbit. These findings support the idea that perikaryal projections in sensory ganglion neurons are normal formations, which maintain the surface-to-volume ratio above the critical level for metabolic exchanges.
采用定量方法和连续切片，在电子显微镜下对猫和兔胸段脊髓神经节中神经元的胞周突起进行了研究。这些突起通常呈指状，大致平行于神经细胞体表面延伸。其长度在0.3至3.25微米之间，横切面近乎圆形，横向直径相当均匀，平均值约为0.2微米。在猫和兔中均发现，胞周突起的表面积与相应神经细胞体的体积和平滑表面积之间存在高度相关性。胞周突起使猫神经细胞体的表面积增加了43%，使兔神经细胞体的表面积增加了39.5%。这些发现支持了这样一种观点，即感觉神经节神经元中的胞周突起是正常结构，可使表面与体积之比维持在代谢交换的临界水平之上。
