Abstract
The nucleus of the solitary tract, the site of esophageal premotor neurons (PMN), is tonically inhibited by GABAergic neurons via the GABAA receptor. We investigated the expression of GABAA α1 subunit mRNA within esophageal PMNs of the NTS utilizing transynaptic tracing with pseudorabies virus and nonisotropic in-situ hybridization. Double-labeling studies revealed that the majority of PRV-immunoreactive cells also expressed GABAA α1 mRNA. The expression of GABAA subunits supports a role for GABA in the brainstem circuit controlling esophageal peristalsis.
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