Payne J K, Horn G
Brain Res. 1982 Jan 28;232(1):191-3. doi: 10.1016/0006-8993(82)90624-2.
Young chicks were placed in running wheels and exposed for a total of 3 h to an imprinting stimulus: a rotating flashing red light. Revolutions made towards the stimulus minus revolutions made away from it were totalled and are referred to as approach counts. After exposure, chicks were anaesthetized and two vertical electrode penetrations were made, one through the visual projection area, hyperstriatum accessorium (HA), and one through the intermediate and medial part of hyperstriatum ventrale (IMHV), a region which has been implicated in the imprinting process. 'Spontaneous' impulse activity was recorded from neurones in these areas. In some of the chicks, after penetrating through HA, discharges evoked by diffuse retinal illumination were monitored and the zona hyperstriatum intercalatus/hyperstriatum dorsale (HI/HD) below HA was classified as being a visually responsive lamina (VRL) if responses were obtained to greater than or equal to 20 consecutive light flashes. In HA there was a positive correlation between spontaneous activity and approach counts in those chicks with a VRL; there was no significant correlation in those chicks without a VRL. In contrast, for IMHV the correlation between spontaneous activity and approach counts was negative and appeared to be independent of the presence or absence of a VRL.
将幼雏放置在跑步轮中，使其总共暴露于一种印记刺激下3小时：一个旋转闪烁的红灯。朝向刺激物的转动次数减去远离刺激物的转动次数，将其总和称为趋近计数。暴露后，对幼雏进行麻醉，并进行两次垂直电极穿刺，一次穿过视觉投射区域，即副纹状体（HA），另一次穿过腹侧纹状体中间和内侧部分（IMHV），该区域与印记过程有关。记录这些区域神经元的“自发”冲动活动。在一些幼雏中，在穿过HA后，监测由弥漫性视网膜光照诱发的放电，如果对连续20次或更多次闪光有反应，则将HA下方的间纹状体/背侧纹状体（HI/HD）分类为视觉反应层（VRL）。在具有VRL的幼雏中，HA中的自发活动与趋近计数之间存在正相关；在没有VRL的幼雏中，没有显著相关性。相比之下，对于IMHV，自发活动与趋近计数之间的相关性为负，并且似乎与VRL的存在与否无关。
