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Current Neuropharmacology


ISSN (Print): 1570-159X
ISSN (Online): 1875-6190

Research Article

Neuroanatomical Correlates of the Late Positive Potential in Youth with Pediatric Bipolar Disorder

Author(s): Alessio Simonetti, Marijn Lijffijt*, Sherin Kurian, Johanna Saxena, Delfina Janiri, Marianna Mazza, Giulio Carriero, Lorenzo Moccia, Benson Mwangi, Alan C. Swann and Jair C. Soares

Volume 21, Issue 7, 2023

Published on: 14 April, 2023

Page: [1617 - 1630] Pages: 14

DOI: 10.2174/1570159X21666230413104536

Price: $65


Background: The late positive potential (LPP) could be a marker of emotion dysregulation in youth with pediatric bipolar disorder (PBD). However, the neuroanatomical correlates of the LPP are still not clarified.

Objective: To provide cortical and deep gray matter correlates of the LPP in youth, specifically, youth with PBD.

Methods: Twenty-four 7 to 17 years-old children with PBD and 28 healthy controls (HC) underwent cortical thickness and deep gray matter volumes measurements through magnetic resonance imaging and LPP measurement elicited by passively viewing emotional faces through electroencephalography. T-tests compared group differences in LPP, cortical thickness, and deep gray matter volumes. Linear regressions tested the relationship between LPP amplitude and cortical thickness/deep gray matter volumes.

Results: PBD had a more pronounced LPP amplitude for happy faces and a thinner cortex in prefrontal areas than HC. While considering both groups, a higher LPP amplitude was associated with a thicker cortex across occipital and frontal lobes, and with a smaller right globus pallidus volume. In addition, a higher LPP amplitude for happy faces was associated with smaller left caudate and left globus pallidus volumes across both groups. Finally, the LPP amplitude correlated negatively with right precentral gyrus thickness across youth with PBD, but positively across HC.

Conclusion: Neural correlates of LPP in youth included fronto-occipital areas that have been associated also with emotion processing and control. The opposite relationship between BPD and HC of LPP amplitude and right precentral gyrus thickness might explain the inefficacy of the emotional control system in PBD.

Keywords: Pediatric bipolar disorder, event-related potentials, late positive potential, magnetic resonance imaging, cortical thickness, subcortical volumes.

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