| VNS | vagal nerve stimulation |
| NTS | nucleus tractus solitarius |
| DMV | dorsal motor nucleus of the vagus |
| BN | Barrington’s nucleus |
| ENS | enteric nervous system |
| ChAT | choline acetyltransferase (cholinergic marker) |
| nNOS | neuronal nitric oxide synthase (nitrergic marker) |
| L-NAME | NO synthase inhibitor |