Fig. 2

Gold chloride staining. a) The outer third of the menisci demonstrated abundant nerve fibers per low power field. And they were pilotaxitic, furcal and curly. b) Nerve fibers in the middle third were decreased in the number. And they became dendritic and furcal. c) At the central third, nerve tissues were absent. d) In the anterior horn, there were more abundant nerves fibers (black arrow) surrounding corresponding minutes blood vessels (white arrow). e) In the posterior horn,there were abundant nerves fibers as well