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A, Mean ± SEM short-latency (0-100 msec) CS-evoked single-unit activity for the EXT (filled circles) and HAB (open circles) rats. B, Scatter plot showing the normalized post-CS onset (0-100 msec) firing rate for INCON (y-axis) and CON (x-axis) tests for every neuron recorded in the EXT (filled circles) and HAB (open circles) groups. Dashed line indicates a 45° line.
