Meyers D E, Snow P J
J Physiol. 1984 Feb;347:59-73. doi: 10.1113/jphysiol.1984.sp015053.
In the L7 segment of cats anaesthetized with alpha-chloralose, single hair follicle afferent (h.f.a.) fibres were injected intra-axonally with horseradish peroxidase (HRP). In the same animal light tactile stimuli were used to plot the receptive fields of laminae III and IV dorsal horn neurons (d.h.n.s) at various rostrocaudal levels below the stained segment of axon. The results showed that eight of the ten injected axons gave rise to collaterals in somatotopically inappropriate regions of the dorsal horn, i.e. those regions in which the receptive fields of d.h.n.s did not encompass the receptive field of the stained h.f.a. Over-all the stained h.f.a.s gave rise to fifty-three collaterals, twenty-two (42%) of which projected to somatotopically inappropriate regions of the dorsal horn. Collateral arborizations in the somatotopically inappropriate region were always located in the same mediolateral region of the dorsal horn as those arborizations in the appropriate region. Collateral arborizations more than 600 microns from the somatotopically appropriate region had few branches and gave rise to very few boutons compared with those within the appropriate region.
在用α-氯醛糖麻醉的猫的L7节段，将辣根过氧化物酶（HRP）轴突内注入单个毛囊传入（h.f.a.）纤维。在同一动物中，使用轻触觉刺激来绘制轴突染色节段下方不同头尾水平的脊髓背角III层和IV层神经元（d.h.n.s）的感受野。结果显示，十条注入轴突中的八条在背角的躯体感觉定位不适当区域产生了侧支，即d.h.n.s的感受野不包含染色h.f.a.的感受野的那些区域。总体而言，染色的h.f.a.产生了53条侧支，其中22条（42%）投射到背角的躯体感觉定位不适当区域。躯体感觉定位不适当区域的侧支分支总是位于背角与适当区域的分支相同的内外侧区域。与适当区域内的侧支相比，距离躯体感觉定位适当区域超过600微米的侧支分支很少，产生的终扣也很少。
