TAUC L, HUGHES G M
J Gen Physiol. 1963 Jan;46(3):533-49. doi: 10.1085/jgp.46.3.533.
A study has been made of Aplysia nerve cells, mainly in the pleural ganglia, in which the main axon divides into at least two branches in the neighbourhood of the soma. Conduction between these branches was investigated by intracellular recordings from the soma following antidromic stimulation via the nerves containing the axonal branches. It has been shown that transmission between separate branches need not involve discharge of the soma but only of the axonal region between the soma and the origin of the branches. In some cells, the spike may fail to invade the other axonal branch, whereas transmission in the opposite direction is readily achieved. Often spikes in none of the branches are transmitted to the others, unless facilitated. Indications about the geometry of the neuron in the vicinity of the soma may be obtained from the study of the relative size of the A spikes originated in different branches. These observations, together with the presence of different sizes of A spikes, produced by orthodromic stimulation, provide evidence that spikes initiated at separate axonal "trigger zones" of Aplysia neurons may be conducted selectively to the effectors or other neurons innervated by the particular branch.
对海兔神经细胞进行了一项研究，主要是在胸膜神经节中，其主要轴突在胞体附近至少分成两个分支。通过在含有轴突分支的神经进行逆向刺激后，从胞体进行细胞内记录，研究了这些分支之间的传导。结果表明，不同分支之间的传递不一定涉及胞体放电，而仅涉及胞体与分支起始点之间的轴突区域放电。在一些细胞中，峰电位可能无法侵入其他轴突分支，而相反方向的传递则很容易实现。通常，除非受到促进，否则任何一个分支中的峰电位都不会传递到其他分支。通过研究起源于不同分支的A峰电位的相对大小，可以获得有关胞体附近神经元几何形状的线索。这些观察结果，以及由顺向刺激产生的不同大小的A峰电位，提供了证据表明，在海兔神经元的不同轴突“触发区”起始的峰电位可能会被选择性地传导到效应器或由特定分支支配的其他神经元。
