Dopaminergic modulation of olfactory-evoked motor output in sea lampreys (Petromyzon marinus L.).

ABSTRACT: Detection of chemical cues is important to guide locomotion in association with feeding and sexual behavior. Two neural pathways responsible for odor-evoked locomotion have been characterized in the sea lamprey (Petromyzon marinus L.), a basal vertebrate. There is a medial pathway originating in the medial olfactory bulb (OB) and a lateral pathway originating from the rest of the OB. These olfactomotor pathways are present throughout the life cycle of lampreys, but olfactory-driven behaviors differ according to the developmental stage. Among possible mechanisms, dopaminergic (DA) modulation in the OB might explain the behavioral changes. Here, we examined DA modulation of olfactory transmission in lampreys. Immunofluorescence against DA revealed immunoreactivity in the OB that was denser i

SUBMITTER: Beausejour PA 

PROVIDER: S-EPMC6899967 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature