Maxwell D J, Bannatyne B A, Fyffe R E, Brown A G
Q J Exp Physiol. 1984 Apr;69(2):381-92. doi: 10.1113/expphysiol.1984.sp002813.
Two Pacinian corpuscle afferents and two rapidly adapting afferents from Krause corpuscles were intra-axonally labelled with horseradish peroxidase in the lumbosacral enlargement of the cat's spinal cord. Tissue was prepared for combined light and electron microscopical analysis. Boutons from both classes of afferent had similar ultrastructural appearances. They both formed from one to three synaptic junctions with dendritic shafts and spines and received axo-axonic synapses. In addition, both categories of bouton were seen to be presynaptic to structures interpreted as vesicle-containing dendrites. It is concluded that both types of afferent fibre are subject to presynaptic control and that they synapse with dorsal horn neurones which are possibly interneurones involved in primary afferent depolarization and post-synaptic dorsal column neurones.
在猫脊髓腰骶膨大处，用辣根过氧化物酶对两条环层小体传入纤维和两条来自克劳斯小体的快速适应传入纤维进行轴突内标记。制备组织用于光镜和电镜联合分析。两类传入纤维的终扣具有相似的超微结构外观。它们都与树突干和树突棘形成一到三个突触连接，并接受轴-轴突触。此外，两类终扣都被观察到是被解释为含囊泡树突结构的突触前成分。结论是，两种类型的传入纤维都受到突触前控制，并且它们与背角神经元形成突触，这些背角神经元可能是参与初级传入去极化的中间神经元和突触后背柱神经元。
