Schmidt E, McCaleb M, Merrill H K
J Exp Anal Behav. 1977 Jan;27(1):161-70. doi: 10.1901/jeab.1977.27-161.
Attenuation of conditioned suppression during intracranial stimulation was compared with that during food reinforcement. Response rates controlled by food and by brain stimulation were equalized on a multiple schedule by adjusting the stimulating current. When foot shock was delivered during timeout periods separating response components, responding for food was significantly more suppressed than responding for brain stimulation. When components were shortened from 10 to 2 minutes, responding maintained by either food or brain stimulation showed a similar temporal pattern of suppression preceding each shock, but responding in the component involving food remained significantly more suppressed. Explanations for the attenuated suppression during brain stimulation based on neural disruption, stimulus blocking, and analgesic properties were questioned. The increased responding during brain stimulation seemed to reflect greater response strength relative to food reinforced responding.
将颅内刺激期间条件性抑制的减弱与食物强化期间的进行了比较。通过调整刺激电流，在多重时间表上使由食物和脑刺激控制的反应率相等。当在分隔反应成分的超时期间给予足部电击时，对食物的反应比对脑刺激的反应受到更显著的抑制。当成分从10分钟缩短到2分钟时，由食物或脑刺激维持的反应在每次电击之前呈现出相似的抑制时间模式，但涉及食物的成分中的反应仍然受到更显著的抑制。基于神经干扰、刺激阻断和镇痛特性对脑刺激期间抑制减弱的解释受到质疑。脑刺激期间反应增加似乎反映了相对于食物强化反应而言更强的反应强度。
