[Neuroanatomical studies on pontine urine storage facilitatory areas in the cat brain. Part II. Output neuronal structures from the nucleus locus subcoeruleus and the nucleus reticularis pontis oralis].

Output neuronal structures from the nucleus locus subcoeruleus (SLC) and the nucleus reticularis ponts roalis (PoO) were investigated by the wheat germ agglutinin-horseradish peroxidase (WGA-HRP) study in cats. Under halothane anesthesia, a double-barreled electrode was inserted into the LSC, PoO. After identification of these regions, the WGA-HRP was injected ionphoretically into the LSC or PoO. WGA-HRP labeled fibers were observed from the hypothalamus to the sacral spinal cord. Fiber connection was assumed between the WGA-HRP injection sites and areas where WGA-HRP labeled cells were located. There were input and output relationships between the LSC, the PoO and the nucleus locus coeruleus alpha which is the pontine micturition center. By injecting the WGA-HRP into the LSC, two major rostral pathways and four major caudal pathways from the LSC were recognized. Two short caudal pathways projected into the cerebellum and the nucleus raphe magnus. Two long caudal pathways passed through the ipsilateral ventral and contralateral funiculi, and projected into the sacral intermediate gray and the Onuf's nucleus. By injecting the WGA-HRP into the PoO, two major rostral pathways and four major caudal pathways from the PoO were recognized. Three short caudal pathways projected into the cerebellum, contralateral reticular formation of the brain stem and the ipsilateral nucleus reticularis gigantocellularis. One long caudal pathway passed through the ipsilateral ventral funiculus and projected into the sacral intermediate gray and the Onuf's nucleus. From these results, the LSC and the PoO seem to send and receive outputs and inputs each other and to integrate the informations.(ABSTRACT TRUNCATED AT 250 WORDS)