Roos A.; Rydenhag, B.; Andersson, S.PAIN: May 1983 doi: 10.1016/0304-3959(83)90086-6 Research report: PDF Only Buy Abstract Article MetricsMetrics Abstract AbstractThe cortical projection of tooth pulp afferents has been investigated by extracellular recordings in lightly chloralose anaesthetized cats. The results indicate two different projection systems from the tooth pulp afferents terminating on the cortical cells. One system appears to be specific with topographical distribution and activates cells mainly in lamina IV in a restricted region of the coronal gyrus. The cells in this area receive excitation also from restricted cutaneous fields. At stimulation of the tooth pulps with single electrical pulses cells are activated with high discharge probability and with a stable latency. The other system projects mainly to cells in the superficial cortical laminae in a much larger area. These cells receive input from large bilateral cutaneous fields but show less discharge probability and require often temporal summation to discharge at tooth pulp stimulation. (Received 22 April 1982, accepted 7 September 1982) © Lippincott-Raven Publishers.