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. Author manuscript; available in PMC: 2011 Jun 10.
Published in final edited form as: Neuron. 2010 Jun 10;66(5):796–807. doi: 10.1016/j.neuron.2010.05.005

Figure 2. Behavior & Single Neuron Example.

Figure 2

A & B: Performance of both monkeys on the delayed match to category task with multiple, independent category distinctions across all recording sessions. Monkeys were able to categorize both Animals and Cars exceptionally well, and displayed a hallmark step function in behavior at the category boundary. Error bars represent standard error of the mean. C: A single PFC neurons showed distinct firing for stimuli of one category (e.g., Sedans) vs. the other category (e.g., Sports Cars). Note how all morph percentages on either side of the category boundary (50%) grouped together (e.g., blue vs. red lines), despite the fact that sample images near the boundary line (60%/40%, dark lines) were closer in physical similarity. Thus, this neuron responded to the category membership of the stimuli rather than their visual properties. This individual PFC neuron multitasked, categorizing both Animals (Cats vs. Dogs) and Cars (Sedans vs. Sports Cars) during the late delay interval.