Kramer A P, Goldman J R, Stent G S
J Neurosci. 1985 Mar;5(3):759-67. doi: 10.1523/JNEUROSCI.05-03-00759.1985.
The overall sizes, contours, and positions of the receptive fields maintained by different individual cells of the T, P, and N types of mechanosensory neurons in the segmental skin of the leech Haementeria ghilianii are not subject to wide variation. However, the locations and contours of the boundaries which separate the various compartments of the sensory field, namely, the major and minor fields, as well as their component subfields, do vary significantly. These variations are reflected in differences in the detailed pattern of arborization of the mechanosensory axon branches that innervate different parts of the receptive field. The appreciable variation in the kinetics of embryonic outgrowth of sensory axon branches, in conjunction with a mechanism of neuronal self-avoidance, is a probable source of this variability in adult receptive field structure. Thus, establishment of these sensory field components would seem to entail a first-come-first-served territorial exclusion between different axon branches extended by the same neuron.
在美洲蛭Haementeria ghilianii节段性皮肤中，T、P和N型机械感觉神经元的不同单个细胞所维持的感受野的整体大小、轮廓和位置不会有很大变化。然而，分隔感觉野各个分区（即主要和次要区域及其组成子区域）的边界的位置和轮廓确实有显著差异。这些差异反映在支配感受野不同部分的机械感觉轴突分支的详细分支模式的差异上。感觉轴突分支胚胎期生长动力学的明显变化，结合神经元自我回避机制，可能是成年感受野结构这种变异性的一个来源。因此，这些感觉野成分的建立似乎需要同一神经元延伸出的不同轴突分支之间遵循先到先得的领地排斥原则。
