1. low blood pressure detected in physiological receptors
2. visceral sensory fibers project to solitary nucleus
3. neurons in the solitary nucleus project to the cardiac acceleratory center
4. neurons from the cardiac acceleratory center project to the spinal cord and synapse on sympathetic preganglionic neurons in the IMLCC
5. preganglionic axons synapse in paravertebral ganglia
6. postganglionic axons project to the heart and cause an increase in heart rate and blood pressure