No difference could be detected in the demyelination between painless lingual nerve and painful inferior alveolar nerve ( P >0 05)Vessel wall of artery were seen thickened and cavity became smaller.
无痛的舌神经与疼痛的下牙槽神经末梢支脱髓鞘程度无显著性差异（ P>0 .0 5 ）。
2
In the smoking group, the number of neurons in CA1, CA3 and dentate gyrus were significantly decreased, the nerve fibers were thickened, swelling and deep stained.