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Summary: JOURNALOF NEUROPHYSIOLOGY
Vol. 50, No. 5, November 1983. Printed
Dorsolateral Pontine Inhibition of Dorsal Horn
Cell Responses to Cutaneous Stimulation: Lack of
Dependence on Catecholaminergic Systems in Cat
CHARLES J. HODGE, JR., A. VANIA APKARIAN, RICHARD T. STEVENS,
GLENN D. VOGELSANG, OLIVER BROWN, AND JOEL I. FRANCK
DepartmentsofNeurosurgeryandPharmacology,State Universityof New York
UpstateMedical Center,Syracuse,New York 13210
SUMMARY AND CONCLUSIONS
1. The effect of stimulating the dorsolat-
era1 pons (DLP) in the region of locus ceru-
leus (LC) on lumbar dorsal horn cell re-
sponses to innocuous and noxious cutaneous
stimuli was assessed and the dependence of
these effects on intact pontospinal catechol-
amine& systems was tested in chloralose-
anesthetized cats.
2. DLP stimulation inhibited the respon-
sesof dorsal horn cells to both noxious and
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