The sympathoregulatory region of the mouse rostral brainstem relies on both GABA and glycine to generate inhibitory currents.

Presympathetic neurons in the ventrolateral and ventromedial medulla (VLM/VMM) control sympathetic tone, and GABA and glycine were identified as inhibitory neurotransmitters. Although glycinergic inhibition of presympathetic neurons in the VLM/VMM has been shown, the sources of glycinergic inputs and the mechanism of glycine release are ill-defined. Here, we tested whether presympathetic neurons in the VLM/VMM receive glycinergic inputs. Glycine is recycled by glycine transporter 2 (GlyT