巴甫洛夫把外在動因与有機體對其回答性活動之間的固定聯系叫做非條件反射,而把它們之間的暫時聯系叫做條件反射,他認為皮層下神經節是最重要的非條件反射或本能的中樞——食物反射、防禦反射、性反射等的中樞;而條件反射則是高級神經活動,它代表着大腦兩半球以及位於其下的皮層下神經節的活動。同時他叉認為,從皮層与皮層下相互作用的觀点來看,高級神經活動雖不僅是皮層的活動,但是以大腦皮層的活動為其主要組成。貝科夫曾寫道:“在實驗條件下對所有器官都能形成暫時性聯 Pavlov called the external motivation and the organism’s fixed connection between the sexual activity is called non-conditional reflex, and the temporary contact between them called conditional reflex, he considered that the subcortical ganglion is the most important non-conditional reflex Or instinct hubs - food reflexes, defensive reflexes, reflexes and other central; and conditioned reflex is a high level of neural activity, which represents the activities of the cerebral hemispheres and the underlying subcortical ganglion. At the same time, he believes that from the perspective of the interaction between the cortex and the cortex, although the high level of neural activity is not only cortical activity, but the main component of the activity of the cerebral cortex. Beike Fu wrote: "under experimental conditions for all organs can form a temporary joint