Boyko V P, Bures J
Physiol Bohemoslov. 1975;24(2):117-25.
Electrophysiological correlates of pecking were studied in 50 freely moving pigeons. With the backward averaging technique average motor potentials (AMPs) were found in all subdivisions of the striatum. The AMPs appeared significantly earlier (40 msec before pecking) in the Wulst than in the neostriatum, ectostriatum, and archistriatum (18 to 28 msec before pecking). Their amplitude could be reduced by monocular occlusion. Average visual responses (AVRs) in the optic tectum were decreased at brief peck-flash intervals, reached maximum with 100 to 200 msec peck-flash delays and then again decreased at intervals corresponding to the occurrence of the next peck (300 msec). A head-mounted microdive system and a miniature FET probe were employed to record unit activity with glass microelectrodes. Out of 280 examined neurones, 83% were activated and 6% inhibited by pecking. The pre- and post-pecking histograms indicated that hyperstriatal neurones are activated earlier and for a longer time than the neostriatal units. It is concluded that rostral parts of striatum play an important role in the functional organisation of pecking.
在50只自由活动的鸽子身上研究了啄食的电生理相关因素。采用反向平均技术，在纹状体的所有亚区均发现了平均运动电位（AMP）。与新纹状体、外纹状体和古纹状体（啄食前18至28毫秒）相比，视叶的AMP出现得明显更早（啄食前40毫秒）。单眼遮挡可降低其振幅。在短暂的啄食 - 闪光间隔时，视顶盖中的平均视觉反应（AVR）降低，在啄食 - 闪光延迟100至200毫秒时达到最大值，然后在与下一次啄食发生对应的间隔（300毫秒）时再次降低。使用头戴式微电极系统和微型场效应晶体管探头，用玻璃微电极记录单位活动。在280个被检查的神经元中，83%被啄食激活，6%被啄食抑制。啄食前后的直方图表明，上纹状体神经元比新纹状体单位激活得更早且持续时间更长。得出的结论是，纹状体的前部在啄食的功能组织中起重要作用。
