Caudal Ventrolateral Medulla (CVLM) Neurons constitute the primary sympathetic inhibitory center in the brainstem. Located in the caudal ventrolateral medulla oblongata, these neurons play a critical role in cardiovascular regulation by providing tonic inhibition to sympathetic premotor neurons in the rostral ventrolateral medulla (RVLM), thereby controlling blood pressure and heart rate through the baroreceptor reflex.
| Property | Value | [1]
|----------|-------| [2]
| Category | Brainstem Autonomic | [3]
| Location | Caudal ventrolateral medulla (obex to -5 mm) | [4]
| Cell Types | GABAergic premotor neurons, C1 adrenergic neurons |
| Primary Neurotransmitter | GABA (inhibitory), Glutamate (excitatory) |
| Key Markers | GAD67, GAD65, Tyrosine Hydroxylase (C1), VGLUT2 |
The CVLM is situated in the ventrolateral medulla:
The CVLM contains distinct neuronal populations:
GABAergic Neurons
C1 Adrenergic Neurons
Baroreceptor Reflex
Tonic Sympathetic Inhibition
Cardiac Control
GABA (Primary)
Glutamate
Essential Hypertension
Neurogenic Hypertension
Electrophysiology: In vivo extracellular and intracellular recordings
Optogenetics: GABAergic neuron-specific manipulation
Chemogenetics: DREADD manipulation of CVLM activity
Tracing: Anterograde and retrograde tract tracing
Blood Pressure Measurement: Telemetry and tail-cuff methods
Baroreflex Assessment: pharmacological and mechanical methods
Rostral Ventrolateral Medulla Sympathetic Neurons
Nucleus Tractus Solitarius Neurons
Baroreceptor Reflex
Autonomic Nervous Systementities/autonomic-nervous-system)
Cardiovascular Regulation
The study of Caudal Ventrolateral Medulla Neurons has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Dampney RA. Functional organization of central pathways regulating the cardiovascular system. Physiol Rev. 1994;74(2):323-364. 1994. ↩︎
Guyenet PG. The sympathetic control of blood pressure. Nat Rev Neurosci. 2006;7(5):335-346. 2006. ↩︎
Abboud FM et al. The baroreceptor reflex. Clin Auton Res. 2006;16(2):92-97. 2006. ↩︎
Thrasher TN. Unloading arterial baroreceptors causes neurogenic hypertension. Hypertension. 2002;40(5):612-617. 2002. ↩︎