Figure 4.

Effect of bulbar NMDA receptor blockade on neural adaptation. A. Average responses of mitral cells during pre-adaptation and post-adaptation odor tests in rats infused with MK-801, expressed as percentages of the average pre-adaptation test response. In these rats, responses to odorants post-habituation were not significantly different from those recorded pre-adaptation. B. Percentages of cells responding significantly to odor presentations in pre- adaptation and post- adaptation tests under control and MK-801 conditions. Asterisks indicate a significant decrease in response magnitude as compared to the first trial or pre- adaptation response (p < 0.05).