Abstract
EEG frequency analysed changes caused by dorsal periaqueductal central gray (dorsal PAG) stimulation in rabbits were compared to EEG frequency analysed changes by acupuncture stimulation to confirm the nature of dorsal PAG as an acupuncture afferent pathway.
After the latent period, θ element was decreased and, later, δ element was increased by dorsal PAG stimulation. Such changes persisted for a while after termination of PAG stimulation (after-effect) . These EEG changes were quite similar to those caused by acupuncture stimulation.
The tendencies towards a reduced latent period and an increaed after-effect were increased by increasing stimulus intensity.
Stimulation of regions other than the acupuncture afferent pathway caused no EEG changes.
These data indicate that the dorsal PAG is an acupuncture afferent pathway region.
