The enhancement of the inhibitory effect couldbe completely abolished by a lesion of the nucleus raphe magnus but not bydecerebration or a lesion in the nucleus raphe dorsalis.

• 去大脑,损毁中缝背核或蓝斑复合核后方的相应区域对此抑制效应没有影响,此后再毁蓝斑复合核,仍可出现上述抑制效应增强的现象; 若损毁延脑中缝大核区,则此增强现象不再出现。