[Studies on the descending projections from the pontine pneumotaxic region to the nucleus raphe magnus in cats].
Experiments were done on 23 pentobarbital anesthetized adult cats. 67 units recorded from the parabrachial and Kölliker-Fuse nuclear complex (NPBM-KF) could be antidromically activated by electrical stimulation of nucleus raphe magnus (NRM). Of the 67 units, 7 were respiratory related units (6 inspiratory, 1 expiratory). These comprise 8% of the 87 respiratory units examined. The antidromic latencies ranged from 0.4 to 2.5 ms. After injection of WGA-HRP (wheat germ agglutinin-conjugated horseradish peroxidase) into the NRM, many retrogradely labelled neurons were observed in the NPBM-KF. These results showed that neurons in the NPBM-KF sent axonal projections to the NRM, which may be involved in the control of respiration as well as nociception.
Song
G
G
Department of Physiology, Shandong Medical University, Jinan.
Liu
L
L
D000818:Animals; D001369:Axons; D002415:Cats; D004558:Electric Stimulation; D004594:Electrophysiology; D006735:Horseradish Peroxidase; D009474:Neurons / Q000502:physiology; D011149:Pons / Q000502:physiology*; D011903:Raphe Nuclei / Q000502:physiology*; D012119:Respiration / Q000502:physiology*
D006735:Horseradish Peroxidase