{"id":{"repo_id":"u-pacific","oai_identifier":"oai:scholarlycommons.pacific.edu:uop_etds-2758"},"canonical_url":"https://search.dev.ndltd.org/etd/u-pacific/oai:scholarlycommons.pacific.edu:uop_etds-2758","repository":{"repo_id":"u-pacific","name":"University of the Pacific","base_url":"https://scholarlycommons.pacific.edu/do/oai/"},"display":{"title":"The effects of two types of frontal lesions on reversal learning and activity level in rats","abstract":"The purpose of this experiment was to compare traditional frontal pole lesions (FP) with lesions of the median dorsal nucleus projection (MDNP) described by Leonard. First, a comparison was made on the retention of spatial discrimination learning and the new learning of spatial discrimination reversals between these two groups of frontally lesioned rats. It was hypothesized that the most severe deficits in spatial reversal learning would be shown in rats receiving MDNP lesions since this area of the rat cortex appears to be homologous to the frontal cortex of higher species according to Leonard’s results. Second, activity was measured on two post-operative occasions, before and after the reversal learning tasks, in both a familiar and an unfamiliar environment.","abstract_html":"The purpose of this experiment was to compare traditional frontal pole lesions (FP) with lesions of the median dorsal nucleus projection (MDNP) described by Leonard. First, a comparison was made on the retention of spatial discrimination learning and the new learning of spatial discrimination reversals between these two groups of frontally lesioned rats. It was hypothesized that the most severe deficits in spatial reversal learning would be shown in rats receiving MDNP lesions since this area of the rat cortex appears to be homologous to the frontal cortex of higher species according to Leonard’s results. Second, activity was measured on two post-operative occasions, before and after the reversal learning tasks, in both a familiar and an unfamiliar environment.","abstract_has_math":false,"creators":["Davison, Meredith Ann"],"institution":null,"degree_name":"Master of Arts (M.A.)","degree_level":"Thesis","degree_discipline":"Psychology","degree_department":null,"school":null,"contributors":["Roseann Hannon"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1972,"date_issued":"1972-01-01T08:00:00Z","date_published":"1972-01-01T08:00:00Z","updated_at":"2026-07-24T05:37:42Z","subjects":["Frontal lobes","Rats Psychology","Learning in animals","Psychophysiology","Psychology"],"languages":[],"rights":[],"rights_urls":["http://rightsstatements.org/vocab/NKC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"https://scholarlycommons.pacific.edu/uop_etds/1759","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Roseann Hannon"]},{"key":"dc:creator","label":"Author","values":["Davison, Meredith Ann"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["1972-01-01T08:00:00Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Psychology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Arts (M.A.)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Frontal lobes","Rats Psychology","Learning in animals","Psychophysiology","Psychology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["http://rightsstatements.org/vocab/NKC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarlycommons.pacific.edu/uop_etds/1759"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The purpose of this experiment was to compare traditional frontal pole lesions (FP) with lesions of the median dorsal nucleus projection (MDNP) described by Leonard. First, a comparison was made on the retention of spatial discrimination learning and the new learning of spatial discrimination reversals between these two groups of frontally lesioned rats. It was hypothesized that the most severe deficits in spatial reversal learning would be shown in rats receiving MDNP lesions since this area of the rat cortex appears to be homologous to the frontal cortex of higher species according to Leonard’s results. Second, activity was measured on two post-operative occasions, before and after the reversal learning tasks, in both a familiar and an unfamiliar environment."]},{"key":"dc:source","label":"Dc Source","values":["37"]},{"key":"dc:title","label":"Title","values":["The effects of two types of frontal lesions on reversal learning and activity level in rats"]}]}],"canonical_facts":{"dc:contributor":["Roseann Hannon"],"dc:creator":["Davison, Meredith Ann"],"dc:date.available":["1972-01-01T08:00:00Z"],"dc:description.abstract":["The purpose of this experiment was to compare traditional frontal pole lesions (FP) with lesions of the median dorsal nucleus projection (MDNP) described by Leonard. First, a comparison was made on the retention of spatial discrimination learning and the new learning of spatial discrimination reversals between these two groups of frontally lesioned rats. It was hypothesized that the most severe deficits in spatial reversal learning would be shown in rats receiving MDNP lesions since this area of the rat cortex appears to be homologous to the frontal cortex of higher species according to Leonard’s results. Second, activity was measured on two post-operative occasions, before and after the reversal learning tasks, in both a familiar and an unfamiliar environment."],"dc:identifier":["https://scholarlycommons.pacific.edu/uop_etds/1759"],"dc:rights":["http://rightsstatements.org/vocab/NKC/1.0/"],"dc:source":["37"],"dc:subject":["Frontal lobes","Rats Psychology","Learning in animals","Psychophysiology","Psychology"],"dc:title":["The effects of two types of frontal lesions on reversal learning and activity level in rats"],"thesis:degree_discipline":["Psychology"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Arts (M.A.)"]},"updated_at":"2026-07-24T05:37:42Z"}