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dc.contributor.authorScully, Erin N.
dc.contributor.authorMoses, Hannah E.
dc.contributor.authorAcerbo, Martin J.
dc.descriptionOlga F. Lazareva (Mentor)en_US
dc.description.abstractOur earlier research has shown that nucleus rotundus (Rt), a thalamic nucleus processing visual information in pigeons, together with its inhibitory complex, nucleus subpretectalis/interstitio-pretectosubpretectalis (SP/IPS), had significantly higher activity than control after figure-ground discrimination (Acerbo et al., 2012). In a follow-up study, we also found that bilateral lesion of SP selectively 28 impairs figure-ground discrimination. Here, we conducted bilateral microinjections of GABAergic receptor antagonist (bicuculline), GABAergic receptor agonist (muscimol), and glutamatergic receptor antagonists (CNQX) to further clarify a role of SP in figure-ground discrimination. Preliminary results showed that both bicuculline and muscimol had a detrimental, dose-dependent effect on accuracy on background trials while leaving figure trials relatively intact. It is therefore possible that inhibitory projections from SP might be suppressing activity of neurons in nucleus rotundus responding to features belonging to background regions. In contrast, the injections of CNQX mostly affected figure trials, suggesting that the excitatory input from the optic tectum may be critical for accurate performance on figure trials but not on background trials.en_US
dc.description.sponsorshipDrake University, Department of Psychology, College of Arts & Sciencesen_US
dc.relation.ispartofseriesDUCURS 2013;Poster 27
dc.subjectFigure-ground perceptionen_US
dc.subjectVisual discriminationen_US
dc.titleEffect Of Pharmacological Manipulation Of Nucleus Subpretectalis On Figure-Ground Discrimination In Pigeonsen_US

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    Poster sessions and presentation from the Drake University Conference on Undergraduate Research in the Sciences held each April at Olmsted Center on the Drake campus.

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