Bagnoli B, Francesconi W, Magni F
Brain Behav Evol. 1977;14(3):217-37. doi: 10.1159/000125662.
The influence of the visual wulst on the optic tectum of Columba livia were studied. Analysis of the surface field potential evoked by optic nerve stimulation showed that it is composed of two presynaptic waves (pr1 and pr2) a negative monosynaptic wave (N) and a late, positive component (P) due to activation of deeply located neurons. Single shock visual wulst stimulation elicited a surface-positive field potential the depth profile of which showed that it is due to the activation of neurons of the deep tectal layers, probably different from those responsible for the P wave. Visual wulst stimulation depresses the positive component of the field potential elicited by optic nerve stimulation. It is suggested that this effect is mediated by intratectal inhibitory interneurons.
研究了家鸽视叶对中脑视顶盖的影响。对视神经刺激诱发的表面场电位分析表明，它由两个突触前波（pr1和pr2）、一个负向单突触波（N）和一个因深部神经元激活产生的晚期正向成分（P）组成。单次电击视叶刺激引发表面正向场电位，其深度分布表明这是由视顶盖深层神经元的激活引起的，可能与产生P波的神经元不同。视叶刺激抑制了视神经刺激诱发的场电位的正向成分。提示这种效应是由视顶盖内抑制性中间神经元介导的。
