Figure 5.

Behavioral performance altered by LTP. Left: Lowering of detection thresholds after HFS. A) Threshold settings on Control day (no HFS/tetanus) and Experimental day (HFS/tetanus). B) Change in Threshold from Block A to Block B for both conditions. This figure reveals that when subjects were in the Control condition, their threshold settings from Block A and Block B remained the same (p>.05). Whereas when subjects received an HFS their threshold settings in Block B were much lower than from Block A, indicating a change in perceptual performance due to the HFS (p<0.001). Right: Detection performance increases after the administration of an HFS/tetanus. C) Block A Median Reaction Times (RT) in the Control condition, both before and after a 2 minute pause in testing. There was very little difference between the blocks when no HFS is administered. Inset- Accuracy data demonstrating that accuracies were very similar between the two blocks and there was a slight decrease in accuracy in the second block. D) Block B Median Reaction Times in the session when subject’s received an HFS. The reaction times are significantly decreased after the HFS, suggesting that subjects’ visual detection thresholds had lowered and thus they were significantly faster in responding to near threshold stimuli. Inset- Accuracy data revealing that accuracy did not change in the HFS condition between blocks signifying no evidence for a speed accuracy trade-off.