Excitatory amino acid immunoreactivity in vestibulo-ocular neurons in gerbils

Retrogradely labeled vestibulo-ocular neurons (VOR) that also stain with antibodies for the excitatory amino acid neurotransmitters glutamate (GLU-LI) or aspartate (ASP-LI) were studied. VOR neurons that contained GLU-LI or ASP-LI label were identified in the medial (MVN) and superior (SVN) vestibular nuclei, and cell group Y. More than half of the VOR cells in MVN were also GLU-LI positive, but less than half of the VOR cells in SVN were double labeled.