Rostral pontine and caudal mesencephalic control of arterial pressure and iliac, celiac and renal vascular resistance. I. Anatomic regions.
The rostral pons and caudal mesencephalon in 26 cats were electrically stimulated (greater than 2400 sites) while measuring arterial pressure and iliac, celiac and renal vascular resistance. Areas active in control of arterial pressure and iliac vasoconstriction were located in the marginal nucleus of the brachium conjunctivum (BCM) and in parts of the central tegmental fields (FTC) of the mesencephalon. Areas active in control of celiac and renal vasoconstriction were confined to the BCM. Areas active in control of iliac and celiac vasodilation were generally found ventral to the constrictor areas in the FTC of the mesencephalon. Stimulation of the caudal periaqueductal grey, locus caeruleus and underlying reticular formation elicited no change in any parameter measured. These findings suggest that multiple pathways for control of arterial pressure and vasoconstriction pass through or synapse in a discrete region of the dorsal rostral pons that is limited to the BCM.
D000324:Adrenocorticotropic Hormone / Q000378:metabolism; D000818:Animals; D001794:Blood Pressure; D002415:Cats; D002445:Celiac Artery / Q000502:physiology*; D004558:Electric Stimulation; D005260:Female; D007083:Iliac Artery / Q000502:physiology*; D008297:Male; D008636:Mesencephalon / Q000033:anatomy & histology / Q000502:physiology*; D009474:Neurons / Q000502:physiology; D011149:Pons / Q000033:anatomy & histology / Q000502:physiology*; D012077:Renal Artery / Q000502:physiology*; D012079:Renal Circulation; D013238:Stereotaxic Techniques; D014655:Vascular Resistance
D000324:Adrenocorticotropic Hormone