C-tactile (CT) afferents are low-threshold mechanoreceptors present in the skin of humans and are thought to convey positive and pleasant aspects of touch, due to their optimal firing during gentle, caress-like contact. This review explores their role and function through the evidence produced in microneurography studies, where it is possible to record from single CTs in awake, healthy humans. CTs send a relatively delayed signal to the brain, due to their unmyelinated, slowly conducting axon, and are highly sensitive to small displacements of the skin, especially from dynamic, moving touch. CTs are primarily mechanoreceptors, but show some thermal sensitivity, where neutral touch (at skin temperature ∼32°C) is optimal, warm touch (∼42°C) activates them less, and cool touch (∼18°C) produces complex responses.

C 触觉 (CT) 传入是存在于人类皮肤中的低阈值机械感受器，由于它们在轻柔的、类似爱抚的接触中最佳激发，因此被认为可以传达积极和愉快的触摸方面。本综述通过显微神经影像学研究中产生的证据探讨了它们的作用和功能，在这些研究中，可以从清醒、健康的人的单次 CT 中进行记录。CT 向大脑发送相对延迟的信号，这是由于其无髓鞘、缓慢传导的轴突，并且对皮肤的小位移高度敏感，尤其是来自动态、移动触摸的位移。CT 主要是机械感受器，但表现出一些热敏感性，其中中性触摸（皮肤温度 ~32°C）是最佳的，温暖的触摸（~42°C）激活它们较少，冷触摸（~18°C）产生复杂的反应.