以角膜伤害性刺激和丘脑腹后内侧核(VPM)的逆行刺激技术,在三叉神经尾侧脊髓束核内记录到二类反应型式的伤害性神经原和二种潜伏期的逆行反应。电针影响伤害性神经原的活动,同时也抑制中间神经原的活动。因此,可以把三叉神经尾侧脊髓束核看做为头面部针刺镇痛的初级整合中枢之一。 Two types of reactive nociceptors and two types of retrograde responses were recorded in the caudal spinal cord of the trigeminal ganglion with corneal noxious stimulation and retrograde stimulation of the ventral ventromedial nucleus (VPM) of the thalamus. Electroacupuncture affects the activity of nociceptors, but also inhibits the activity of interneurons. Therefore, the caudal spinal cord nucleus of the trigeminal nerve can be regarded as one of the primary integrated centers for acupuncture analgesia of the head and face.