Jahoda C A, Oliver R F
J Anat. 1984 Sep;139 ( Pt 2)(Pt 2):333-9.
The present study has demonstrated an anatomical relationship between the position of the growing and non-growing hairs of the rat vibrissa follicle and the point where the follicular nerve supply penetrates the follicle capsule circumference. This finding may be significant in relation to the sensory function of the follicle, as physiological data have shown that the degree of stimulation of brain cells following mechanical displacement of the whisker is direction dependent. The observed relationship between the nerve entry point and the hairs, therefore, may reflect an uneven distribution of nerve endings around the upper follicle circumference. In relation to hair growth, the above observation requires that the non-growing club hair must consistently move up one side of the follicle at the end of each growth cycle. A possible clue as to the mechanism by which club hair movement is directed can be derived from observation of asymmetry, both at the base of the club hair, and in the epidermal matrix near the end of the growth cycle.
本研究已证明大鼠触须毛囊中生长毛发和非生长毛发的位置与毛囊神经供应穿透毛囊囊周缘的点之间存在解剖学关系。这一发现可能与毛囊的感觉功能有关，因为生理学数据表明，触须机械移位后脑细胞的刺激程度取决于方向。因此，观察到的神经进入点与毛发之间的关系可能反映了毛囊上半周缘神经末梢分布不均。关于毛发生长，上述观察结果表明，在每个生长周期结束时，不生长的球毛必须始终沿着毛囊的一侧向上移动。关于球毛移动的导向机制的一个可能线索可以从球毛基部以及生长周期末期表皮基质中的不对称现象观察中得出。
