这种显像技术显示一些神经元能够被给予糖水或是条件刺激激活，而另一些神经元能够被注射氯化锂或非条件刺激物激活。
The imaging technique showed that some neurons were activated by the saccharine, or the conditioned stimulus, and others were activated by the lithium chloride or the unconditioned stimulus.
伯恩斯坦博士和她的同事还提出一种模型，即当给予非条件刺激物后给予条件刺激，联想性学习就会发生，即触发了会聚神经元。
Bernstein and her colleagues also proposed a model that associative learning takes place when a conditioned stimulus is followed by an unconditioned stimulus, triggering convergent neurons.
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