Stanford L R, Hartline P H
Brain Res. 1980 Mar 3;185(1):115-23. doi: 10.1016/0006-8993(80)90676-9.
Neural responses in the nucleus of the lateral descending tract of the trigeminal nerve (LTTD) of the rattlesnake Crotalus viridis were recorded. Neurons in the LTTD respond phasically to infrared stimulation of the pit organ, in contrast to the tonic responses that have been reported for the primary afferents. The receptive field dimensions of LTTD neurons are smaller than those of the primary afferents; some LTTD neurons have inhibitory regions within their receptive fields. The smaller receptive fields of neurons in the LTTD, as well as the phasic responses of these cells, might be a result of this inhibition. This is an instance of spatial sharpening and possibly enhancement of responses to time-changing stimuli due to excitatory and inhibitory neural interactions in a primary trigeminal nucleus.
记录了绿曼巴蛇（Crotalus viridis）三叉神经外侧下行束核（LTTD）中的神经反应。与初级传入神经的紧张性反应不同，LTTD中的神经元对颊窝器官的红外刺激产生相位反应。LTTD神经元的感受野尺寸小于初级传入神经的感受野尺寸；一些LTTD神经元在其感受野内有抑制区域。LTTD中神经元较小的感受野以及这些细胞的相位反应可能是这种抑制的结果。这是由于初级三叉神经核中兴奋性和抑制性神经相互作用导致空间锐化以及对随时间变化的刺激反应可能增强的一个实例。
