Hippocampal CA3 activation alleviates fMRI-BOLD responses in the rat prefrontal cortex induced by electrical VTA stimulation
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{"title"=>"Hippocampal CA3 activation alleviates fMRI-BOLD responses in the rat prefrontal cortex induced by electrical VTA stimulation", "type"=>"journal", "authors"=>[{"first_name"=>"Thomas", "last_name"=>"Scherf", "scopus_author_id"=>"35183964800"}, {"first_name"=>"Frank", "last_name"=>"Angenstein", "scopus_author_id"=>"6603395575"}], "year"=>2017, "source"=>"PLoS ONE", "identifiers"=>{"doi"=>"10.1371/journal.pone.0172926", "sgr"=>"85014041008", "isbn"=>"1111111111", "pmid"=>"28241047", "issn"=>"19326203", "scopus"=>"2-s2.0-85014041008", "pui"=>"614571038"}, "id"=>"3f376671-e62e-3aca-8122-8391917d79f2", "abstract"=>"Functional magnetic resonance imaging (fMRI) was used to identify brain-wide networks that are activated by electrical stimulation of either the ventral tegmental area (VTA) or hip-pocampal CA3 region. Stimulation of either one of these regions caused significant BOLD responses in common structures, such as the septum and left and right hippocampus, but also in unique structures, such as the medial prefrontal cortex region/anterior cingulum region (mPFC/ACC) and striatum, which were only activated during VTA stimulation. Con-current stimulations of the two structures resulted in no additive BOLD responses but sig-nificantly reduced BOLD responses in the mPFC/ACC when compared with sole VTA stimulation. This reduction is caused by costimulation of the hippocampal CA3 region, which was itself not sufficient to modify BOLD signal intensities in the mPFC/ACC. Under this experimental condition, functional connectivity between VTA and mPFC/ACC in terms of neurophysiological interactions was causative, driven by direct electrical stimulation of VTA projecting neurons, the resulting functional connectivity in terms of correlated BOLD time series becoming masked as soon as hippocampal projections concurrently coactivated mPFC neurons. This result warns against misinterpretation of the absence of functional con-nectivity in fMRI data sets, because strong existing neurophysiological interactions can be obscured by unrelated network activities.", "link"=>"http://www.mendeley.com/research/hippocampal-ca3-activation-alleviates-fmribold-responses-rat-prefrontal-cortex-induced-electrical-vt", "reader_count"=>10, "reader_count_by_academic_status"=>{"Unspecified"=>3, "Professor > Associate Professor"=>1, "Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>3, "Student > Bachelor"=>1, "Professor"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>3, "Professor > Associate Professor"=>1, "Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>3, "Student > Bachelor"=>1, "Professor"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>3, "Agricultural and Biological Sciences"=>3, "Neuroscience"=>3, "Psychology"=>1}, "reader_count_by_subdiscipline"=>{"Neuroscience"=>{"Neuroscience"=>3}, "Psychology"=>{"Psychology"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>3}, "Unspecified"=>{"Unspecified"=>3}}, "group_count"=>0}

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