高等动物成年有机体的神经细胞是高度分化的细胞,但在创伤的条件下可以出现神经细胞的有丝分裂,如摘除部分皮质后给予机械刺激(浸入生理盐水的纱布复盖于皮质表面)或滴入异体创伤脑的提取液,都能略微增加神经细胞有丝分裂的数量和延长有丝分裂象出现的时间(徐静1962)。对促进神经细胞分裂的条件的探讨这一项工作还只是刚刚开始。曾有人提出氦氖激光的波长6328埃可穿透组织1.5厘米的深度。激光对切断 Higher animal adult organ cells are highly differentiated nerve cells, but under the conditions of trauma can occur in mitotic neurons, such as removal of part of the cortex after given mechanical stimulation (immersed in saline saline gauze covering the cortical surface) or dripped foreign body Traumatic brain extract can slightly increase the number of mitotic neurons and extend the appearance of mitotic figures (Xu Jing 1962). The discussion of the conditions that promote the division of nerve cells is just the beginning. It has been proposed HeNe laser wavelength 6328 Angstroms can penetrate the depth of 1.5 cm tissue. Laser cut off