Figure 5From: Morphine modulation of pain processing in medial and lateral pain pathways Comparison of percentage of neurons responding to noxious stimulation before (solid lines) and after (dashed lines) morphine or NS delivery. Chi-square tests were used to detect the percentage differences between different sessions over time. Consistent with the result of neuronal response magnitude, the number of responding neurons in all recorded areas was also decreased after injection of morphine. By contrast, NS treatment did not affect the nociceptive related responses.Back to article page