The Detection of Novelty Relies on Dopaminergic Signaling: Evidence from Apomorphine's Impact on the Novelty N2
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{"title"=>"The Detection of Novelty Relies on Dopaminergic Signaling: Evidence from Apomorphine's Impact on the Novelty N2", "type"=>"journal", "authors"=>[{"first_name"=>"Mauricio", "last_name"=>"Rangel-Gomez", "scopus_author_id"=>"55771373300"}, {"first_name"=>"Clayton", "last_name"=>"Hickey", "scopus_author_id"=>"13608525200"}, {"first_name"=>"Therese", "last_name"=>"van Amelsvoort", "scopus_author_id"=>"6701774874"}, {"first_name"=>"Pierre", "last_name"=>"Bet", "scopus_author_id"=>"6603379399"}, {"first_name"=>"Martijn", "last_name"=>"Meeter", "scopus_author_id"=>"8588045400"}], "year"=>2013, "source"=>"PLoS ONE", "identifiers"=>{"isbn"=>"1932-6203 (Electronic)\\r1932-6203 (Linking)", "sgr"=>"84879258124", "doi"=>"10.1371/journal.pone.0066469", "pui"=>"369157913", "scopus"=>"2-s2.0-84879258124", "issn"=>"19326203", "pmid"=>"23840482"}, "id"=>"fa981d0c-b24c-303c-9d9d-5ab281fda462", "abstract"=>"Despite much research, it remains unclear if dopamine is directly involved in novelty detection or plays a role in orchestrating the subsequent cognitive response. This ambiguity stems in part from a reliance on experimental designs where novelty is manipulated and dopaminergic activity is subsequently observed. Here we adopt the alternative approach: we manipulate dopamine activity using apomorphine (D1/D2 agonist) and measure the change in neurological indices of novelty processing. In separate drug and placebo sessions, participants completed a von Restorff task. Apomorphine speeded and potentiated the novelty-elicited N2, an Event-Related Potential (ERP) component thought to index early aspects of novelty detection, and caused novel-font words to be better recalled. Apomorphine also decreased the amplitude of the novelty-P3a. An increase in D1/D2 receptor activation thus appears to potentiate neural sensitivity to novel stimuli, causing this content to be better encoded.", "link"=>"http://www.mendeley.com/research/detection-novelty-relies-dopaminergic-signaling-evidence-apomorphines-impact-novelty-n2", "reader_count"=>25, "reader_count_by_academic_status"=>{"Unspecified"=>1, "Professor > Associate Professor"=>2, "Student > Doctoral Student"=>2, "Researcher"=>3, "Student > Ph. D. Student"=>8, "Student > Postgraduate"=>2, "Student > Master"=>5, "Student > Bachelor"=>2}, "reader_count_by_user_role"=>{"Unspecified"=>1, "Professor > Associate Professor"=>2, "Student > Doctoral Student"=>2, "Researcher"=>3, "Student > Ph. D. Student"=>8, "Student > Postgraduate"=>2, "Student > Master"=>5, "Student > Bachelor"=>2}, "reader_count_by_subject_area"=>{"Unspecified"=>2, "Agricultural and Biological Sciences"=>8, "Neuroscience"=>4, "Psychology"=>10, "Economics, Econometrics and Finance"=>1}, "reader_count_by_subdiscipline"=>{"Neuroscience"=>{"Neuroscience"=>4}, "Psychology"=>{"Psychology"=>10}, "Economics, Econometrics and Finance"=>{"Economics, Econometrics and Finance"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>8}, "Unspecified"=>{"Unspecified"=>2}}, "reader_count_by_country"=>{"Canada"=>1, "Belgium"=>1, "Japan"=>1, "United Kingdom"=>1, "South Africa"=>1}, "group_count"=>2}

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Figshare

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  • {"files"=>["https://ndownloader.figshare.com/files/1095450"], "description"=>"<p>Description of a control experiment, designed to test the effect of size on the expression of the ERP components presented in this document.</p>", "links"=>[], "tags"=>["Biochemistry", "Neurochemistry", "Neurochemicals", "dopamine", "neuroscience", "Mental health", "psychology", "Cognitive psychology", "Experimental psychology", "learning", "memory", "neuropsychology", "designed", "erp", "components", "presented"], "article_id"=>727004, "categories"=>["Medicine", "Biological Sciences", "Sociology"], "users"=>["Mauricio Rangel-Gomez", "Clayton Hickey", "Therese van Amelsvoort", "Pierre Bet", "Martijn Meeter"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0066469.t001", "stats"=>{"downloads"=>3, "page_views"=>2, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Description_of_a_control_experiment_designed_to_test_the_effect_of_size_on_the_expression_of_the_ERP_components_presented_in_this_document_/727004", "title"=>"Description of a control experiment, designed to test the effect of size on the expression of the ERP components presented in this document.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-06-20 01:56:44"}
  • {"files"=>["https://ndownloader.figshare.com/files/1095445"], "description"=>"<p>Error bars represent the standard error of the mean of the individual means.</p>", "links"=>[], "tags"=>["Biochemistry", "Neurochemistry", "Neurochemicals", "dopamine", "neuroscience", "Mental health", "psychology", "Cognitive psychology", "Experimental psychology", "learning", "memory", "neuropsychology", "presented", "bars", "plotted", "apomorphine"], "article_id"=>727001, "categories"=>["Medicine", "Biological Sciences", "Sociology"], "users"=>["Mauricio Rangel-Gomez", "Clayton Hickey", "Therese van Amelsvoort", "Pierre Bet", "Martijn Meeter"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0066469.g001", "stats"=>{"downloads"=>0, "page_views"=>4, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Behavioral_data_Accuracy_is_presented_in_the_y_axis_and_bars_are_plotted_for_novel_and_standard_stimuli_both_under_apomorphine_and_placebo_/727001", "title"=>"Behavioral data. Accuracy (%) is presented in the y-axis, and bars are plotted for novel and standard stimuli, both under apomorphine and placebo.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-06-20 01:56:41"}
  • {"files"=>["https://ndownloader.figshare.com/files/1095447"], "description"=>"<p>Time is indexed on the x-axis in milliseconds; zero indicates stimulus onset. ERP magnitude is indexed on the y-axis in microvolts (µV). For all the ERP plots, the continuous line corresponds to the Apomorphine condition and the dotted line to placebo. A. ERPs to novel stimuli at Fz electrode. Additionally the topography of the difference between apomorphine and placebo conditions is presented, as calculated from 140 ms to 220 ms. B. ERPs to standard stimuli at Fz electrode. C. ERPs to novel stimuli at Cz electrode. Additionally the topography of the difference between apomorphine and placebo conditions is presented, as calculated from 350 ms to 450 ms. D. ERPs to standard stimuli at Cz electrode.</p>", "links"=>[], "tags"=>["Biochemistry", "Neurochemistry", "Neurochemicals", "dopamine", "neuroscience", "Mental health", "psychology", "Cognitive psychology", "Experimental psychology", "learning", "memory", "neuropsychology", "elicited", "stimuli", "apomorphine", "electrodes", "fz"], "article_id"=>727002, "categories"=>["Medicine", "Biological Sciences", "Sociology"], "users"=>["Mauricio Rangel-Gomez", "Clayton Hickey", "Therese van Amelsvoort", "Pierre Bet", "Martijn Meeter"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0066469.g002", "stats"=>{"downloads"=>0, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_ERPs_elicited_by_novel_and_standard_stimuli_after_administration_of_apomorphine_and_placebo_at_electrodes_Fz_and_Cz_/727002", "title"=>"ERPs elicited by novel and standard stimuli after administration of apomorphine and placebo, at electrodes Fz and Cz.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-06-20 01:56:42"}

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