PMID- 9315383 OWN - NLM STAT- MEDLINE DCOM- 19971119 LR - 20190826 IS - 0305-1870 (Print) IS - 0305-1870 (Linking) VI - 24 IP - 9-10 DP - 1997 Sep-Oct TI - Supramedullary modulation of sympathetic vasomotor function. PG - 748-54 AB - 1. Supramedullary structures including the ventral medial prefrontal cortex (MPFC) and the midbrain cuneiform nucleus (CnF) project directly and indirectly to premotor sympatho-excitatory neurons of the rostral ventrolateral medulla (RVLM) that are critically involved in the generation of sympathetic vasomotor tone. 2. Electrophysiological studies have demonstrated that activation of depressor sites within the MPFC is associated with splanchnic sympathetic vasomotor inhibition and inhibition of the activity of RVLM sympathoexcitatory neurons. 3. Antidromic mapping and anatomical studies support the notion that a relay in the nucleus tractus solitarius is involved in the cardiovascular response to MPFC stimulation. 4. The midbrain CnF, which lies adjacent to the midbrain periaqueductal grey, is a sympathoexcitatory region of the midbrain reticular formation. Sympathoexcitatory responses evoked from the CnF are associated with short-latency excitation of RVLM neurons. 5. Cuneiform nucleus stimulation induces the expression of mRNA for the immediate early genes c-fos and NGFI-A in mid-brain, pontine and hypothalamic structures. 6. The MPFC and CnF are supramedullary structures with opposing modulatory influences on sympathetic vasomotor drive, whose roles in cardiovascular control mechanisms warrant further investigation. FAU - Verberne, A J AU - Verberne AJ AD - University of Melbourne, Department of Medicine, Victoria, Australia. tonyv@austin.unimelb.edu.au FAU - Lam, W AU - Lam W FAU - Owens, N C AU - Owens NC FAU - Sartor, D AU - Sartor D LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - Australia TA - Clin Exp Pharmacol Physiol JT - Clinical and experimental pharmacology & physiology JID - 0425076 RN - 0 (Neurotransmitter Agents) SB - IM MH - Animals MH - Autonomic Pathways/physiology MH - Humans MH - Medulla Oblongata/*physiology MH - Muscle, Smooth, Vascular/innervation/*physiology MH - Neurotransmitter Agents/*physiology MH - Sympathetic Nervous System/*physiology RF - 80 EDAT- 1997/10/07 00:00 MHDA- 1997/10/07 00:01 CRDT- 1997/10/07 00:00 PHST- 1997/10/07 00:00 [pubmed] PHST- 1997/10/07 00:01 [medline] PHST- 1997/10/07 00:00 [entrez] AID - 10.1111/j.1440-1681.1997.tb02126.x [doi] PST - ppublish SO - Clin Exp Pharmacol Physiol. 1997 Sep-Oct;24(9-10):748-54. doi: 10.1111/j.1440-1681.1997.tb02126.x.