猫的第7腰神经和第1骶神经前根中的感觉纤维。

Receptive fields were determined for ninety-eight unmyelinated and 132 myelinated axons in the L7 and S1 cat ventral roots.2. Seventy of the ninety-eight unmyelinated axons had their receptive fields in somatic structures, the skin and deep tissues.3. Of the seventy unmyelinated axons with somatic receptive fields, thirty-five were mechanical nociceptors, fifteen were mechanical and thermal nociceptors, eleven were deep nociceptors, six were thermal receptors, and three were low threshold mechanoceptors.4. Twenty-four of the ninety-eight unmyelinated axons had their receptive fields in visceral structures: the intestine, bladder and vagina.5. We confirm the work of others that myelinated fibres attached to peripheral receptive fields can be found in ventral roots and that the receptive fields and functional qualities of these fibres are as one would expect of dorsal root fibres for the same segments.6. A previous study demonstrated that approximately 30% of the axons in the L7 and S1 cat ventral roots are unmyelinated and arise from dorsal root ganglion cells. The present study confirms that these axons are sensory and that the axons are predominantly cutaneous nociceptors and visceral afferents. Thus it is concluded that the L7 and S1 cat ventral roots have a major sensory component.

在猫的L7和S1腹根中，确定了98条无髓鞘轴突和132条有髓鞘轴突的感受野。
98条无髓鞘轴突中的70条在躯体结构（皮肤和深部组织）中有其感受野。
在70条有躯体感受野的无髓鞘轴突中，35条是机械性伤害感受器，15条是机械性和热性伤害感受器，11条是深部伤害感受器，6条是热感受器，3条是低阈值机械感受器。
98条无髓鞘轴突中的24条在内脏结构（肠、膀胱和阴道）中有其感受野。
我们证实了其他人的研究成果，即附着于外周感受野的有髓鞘纤维可在腹根中找到，并且这些纤维的感受野和功能特性与同一节段背根纤维的预期情况相同。
先前的一项研究表明，猫L7和S1腹根中约30%的轴突是无髓鞘的，且起源于背根神经节细胞。本研究证实这些轴突是感觉性的，并且这些轴突主要是皮肤伤害感受器和内脏传入纤维。因此得出结论，猫的L7和S1腹根有一个主要的感觉成分。

Sensory fibres in ventral roots L7 and Si in the cat.