After 12 weeks, the anteriorroot fiber expression turned down obviously, however the posterior root fiber expression backed up slightly compared with that of the 8 weeks.
至术后12周时，前根纤维表达强度明显减低，而后根纤维却较术后8周时略有回升。
2
Microsurgical observation proved that dorsal root could be divided into 10-18 small tracts and anteriorroot 6-11 tracts; the diameter of small tracts was similar and the number was constant.