Behavioral detection of subcortical stimuli: comparison of somatosensory and "motor" circuits.
Behavioral detection of subcortical stimuli: comparison of somatosensory and "motor" circuits.
复制标题
皮层下刺激的行为检测：体感和“运动”电路的比较。
DOI：
10.1037/h0077920
复制
发表时间：
1982
期刊：
影响因子：
--
通讯作者：
Swett,JE
中科院分区：
文献类型：
--
作者：
Bourassa,CM;Swett,JE
五只猫被训练在丘脑腹侧核(VL)和小脑深部核受到刺激后，按下杠杆以获得食物强化。通过测量与十字前皮质最小幅度诱发反应的出现相关的刺激强度，可以测量行为检测阈值并将行为与大脑皮层活动相关联。当刺激率为25赫兹或更高时，VL是产生检测的最低有效刺激点。当刺激频率低于25赫兹时，刺激外侧核或错位核在诱发行为方面的效果甚至更差，但当刺激频率为25赫兹或更高时，检测阈值降低到低于VL刺激的水平；小脑刺激产生的检测与其他实验中刺激腹基底核复合体一样容易。研究结果表明，小脑可能会调节感觉体验，而大脑皮层的某些部分，如十字周围和丘上区域，似乎并不直接参与调节感觉检测。据推测，神经检测回路更有可能在皮质下结构中找到，而不是在大脑皮质结构中。(参考文献55)(心理信息数据库记录(C)2016 APA，保留所有权利)
Five cats were trained to press a lever for food reinforcement in response to stimulation of the ventral lateral (VL) nucleus of the thalamus and the deep cerebellar nuclei. By scaling stimulus intensities relative to the appearance of a minimal amplitude evoked response in precruciate cortex, it was possible to measure behavioral detection thresholds and correlate behavior with electrocortical activity. With stimulus rates of 25 Hz or greater, VL was the least effective stimulus site for producing detection. At stimulus rates less than 25 Hz, stimulation of the lateral or interpositus nuclei was even less effective in eliciting behavior, but at rates of 25 Hz or more, detection thresholds decreased below those for VL stimulation; cerebellar stimulation produced detection as readily as had stimulation of the ventrobasal complex in other experiments. Findings suggest that the cerebellum may modulate sensory experiences and that some portions of cerebral cortex, the pericruciate and suprasylvian regions, do not appear to be directly involved in mediating sensory detection. It is postulated that the neural detection circuits are more likely to be found in subcortical than in cerebrocortical structures.(55 ref)(PsycINFO Database Record (c) 2016 APA, all rights reserved)