My Bibliography

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Manes JL, Stipancic KL, Westemeyer L, Rohl A, Greenlee JDW, Narayanan N, Uc E, Tjaden K. Perceptual Outcome Measures for Supplementing Transcription Intelligibility in Speakers with Parkinson's Disease and Mild Dysarthria. Folia Phoniatr Logop. 2026 Feb 3;:1-14. doi: 10.1159/000550174. [Epub ahead of print] PubMed PMID: 41632721; PubMed Central PMCID: PMC12871864.

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Matthew A. Weber, Kartik Sivakumar, Alexandra S. Bova, Ervina E. Tabakovic, Mackenzie M. Conlon, Mayu Oya, Rachel C. Cole, Arturo I. Espinoza, Youngcho Kim, Nandakumar S. Narayanan. Ventral tegmental area dopamine controls timing variability. 2025 October. DOI: 10.1101/2025.10.27.684913.

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Simin Jamshidi, Arturo I. Espinoza, Jonathan T. Heinzman, Patrick May, Ergun Y. Uc, Nandakumar S. Narayanan, Soura Dasgupta. Linear predictive coding electroencephalography algorithms predict Parkinson’s disease mortality using out-of-sample tests. 2025 July. DOI: 10.1101/2025.07.07.25331047.

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Matthew A. Weber, Kartik Sivakumar, Braedon Q. Kirkpatrick, Hannah R. Stutt, Ervina E. Tabakovic, Alexandra S. Bova, Young-cho Kim, Nandakumar S. Narayanan. Amphetamine increases timing variability by degrading prefrontal temporal encoding. Neuropharmacology. 2025 September. doi: 10.1016/j.neuropharm.2025.110486.

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Rachel C. Cole, Nadja R. Ging-Jehli, Juan Vivanco Suarez, Jeremy D. Greenlee, Jan R. Wessel, Arturo I. Espinoza, Johnson Zhang, James F. Cavanagh, Nandakumar S. Narayanan. Theta-frequency subthalamic nucleus stimulation increases decision threshold. Brain Stimulation. 2025 July. doi: 10.1016/j.brs.2025.05.105.

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Hunter P Twedt, Brooke E Yeager, Jacob E Simmering, Jordan L Schultz, Nandakumar S Narayanan. Cortical connectivity predicts cognition across time in Parkinson’s disease. 2025 May. DOI: 10.1101/2025.05.13.25327462.

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Robert A Bruce, Matthew Weber, Alexandra Bova, Rachael Volkman, Casey Jacobs, Kartik Sivakumar, Hannah Stutt, Youngcho Kim, Rodica Curtu, Nandakumar S Narayanan. Complementary cognitive roles for D2-MSNs and D1-MSNs during interval timing. eLife. 2025 January. doi: 10.7554/eLife.96287.

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Robert A Bruce, Matthew Weber, Alexandra Bova, Rachael Volkman, Casey Jacobs, Kartik Sivakumar, Hannah Stutt, Youngcho Kim, Rodica Curtu, Nandakumar S Narayanan. Complementary cognitive roles for D2-MSNs and D1-MSNs during interval timing. eLife. 2025 January. doi: 10.7554/eLife.96287.4.

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Nandakumar S. Narayanan, James M. Hyman, Jeremy Seamans, Erin L. Rich. Computational Properties of the Prefrontal Cortex. The Journal of Neuroscience. 2025 September. doi: 10.1523/JNEUROSCI.1093-25.2025.

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Cole RC, Ging-Jehli NR, Vivanco Suarez J, Greenlee JD, Wessel JR, Espinoza AI, Zhang J, Cavanagh JF, Narayanan NS. Theta-frequency subthalamic nucleus stimulation increases decision threshold. Brain Stimul. 2025 Jul-Aug;18(4):1021-1027. doi: 10.1016/j.brs.2025.05.105. Epub 2025 May 13. PubMed PMID: 40374107; PubMed Central PMCID: PMC12392301.

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Weber MA, Sivakumar K, Kirkpatrick BQ, Stutt HR, Tabakovic EE, Bova AS, Kim YC, Narayanan NS. Amphetamine increases timing variability by degrading prefrontal temporal encoding. Neuropharmacology. 2025 Sep 1;275:110486. doi: 10.1016/j.neuropharm.2025.110486. Epub 2025 May 3. PubMed PMID: 40324651; PubMed Central PMCID: PMC12261982.

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Weber MA, Kerr G, Thangavel R, Conlon MM, Gumusoglu SB, Gupta K, Abdelmotilib HA, Halhouli O, Zhang Q, Geerling JC, Narayanan NS, Aldridge GM. Alpha-Synuclein Pre-Formed Fibrils Injected into Prefrontal Cortex Primarily Spread to Cortical and Subcortical Structures. J Parkinsons Dis. 2024;14(1):81-94. doi: 10.3233/JPD-230129. PubMed PMID: 38189765; PubMed Central PMCID: PMC10836574.

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Matthew A. Weber, Kartik Sivakumar, Braedon Q. Kirkpatrick, Hannah R. Stutt, Ervina E. Tabakovic, Alexandra S Bova, Young-cho Kim, Nandakumar S. Narayanan. Amphetamine increases timing variability by degrading prefrontal ramping activity. 2024 September. DOI: 10.1101/2024.09.26.615252.

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Brooke E. Yeager, Hunter P. Twedt, Joel Bruss, Jordan Schultz, Nandakumar S. Narayanan. Cortical and subcortical functional connectivity and cognitive impairment in Parkinson’s disease. NeuroImage: Clinical. 2024. doi: 10.1016/j.nicl.2024.103610.

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Md Fahim Anjum, Arturo I. Espinoza, Rachel C. Cole, Arun Singh, Patrick May, Ergun Y. Uc, Soura Dasgupta, Nandakumar S. Narayanan. Resting-state EEG measures cognitive impairment in Parkinson’s disease. npj Parkinson's Disease. 2024 January. doi: 10.1038/s41531-023-00602-0.

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Cameron Keomanivong, Josephine Schamp, Ervina Tabakovic, Ramasamy Thangavel, Georgina Aldridge, Andrew A. Pieper, Nandakumar S. Narayanan. Mice Expressing A53T/A30P Mutant Alpha-Synuclein in Dopamine Neurons Do Not Display Behavioral Deficits. eneuro. 2024 February. doi: 10.1523/ENEURO.0170-23.2023.

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Yuhang Wang, Joyce Z. Gao, Taylor Sakaguchi, Thorsten Maretzky, Prajwal Gurung, Nandakumar S. Narayanan, Sarah Short, Yiqin Xiong, Zizhen Kang. LRRK2 G2019S Promotes Colon Cancer Potentially via LRRK2–GSDMD Axis-Mediated Gut Inflammation. Cells. 2024 March. doi: 10.3390/cells13070565.

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R. Austin Bruce, Matthew A. Weber, Alexandra S. Bova, Rachael A. Volkman, Casey E. Jacobs, Kartik Sivakumar, Hannah R Stutt, Young-cho Kim, Rodica Curtu, Nandakumar S. Narayanan. Complementary cognitive roles for D2-MSNs and D1-MSNs in interval timing. 2024 March. DOI: 10.7554/eLife.96287.1.

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Yuhang Wang, Joyce Z. Gao, Taylor Sakaguchi, Thorsten Maretzky, Prajwal Gurung, Nandakumar S. Narayanan, Sarah Short, Yiqin Xiong, Zizhen Kang. LRRK2 G2019S Promotes Colon Cancer Potentially via LRRK2–GSDMD Axis-Mediated Gut Inflammation. Cells. 2024 March. doi: 10.3390/cells13070565.

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Alexander Hart, Georgina Aldridge, Qiang Zhang, Nandakumar S. Narayanan, Jacob E. Simmering. Association of Terazosin, Doxazosin, or Alfuzosin Use and Risk of Dementia With Lewy Bodies in Men. Neurology. 2024 July. doi: 10.1212/WNL.0000000000209570.

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R Austin Bruce, Matthew A Weber, Alexandra S Bova, Rachael A Volkman, Casey E Jacobs, Kartik Sivakumar, Hannah R Stutt, Young-cho Kim, Rodica Curtu, Nandakumar S Narayanan. Complementary opposing D2-MSNs and D1-MSNs dynamics during interval timing. 2024 August. DOI: 10.7554/eLife.96287.2.

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Nandakumar S. Narayanan, Zahra Jourahmad, Rachel C. Cole, James F. Cavanagh. Cognition falters at ~4 Hz in Parkinson’s disease. Trends in Cognitive Sciences. 2024 September. doi: 10.1016/j.tics.2024.06.002.

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Aimee Bertolli, Oday Halhouli, Yiming Liu-Martínez, Brianna Blaine, Ramasamy Thangavel, Qiang Zhang, Eric Emmons, Nandakumar S. Narayanan, Serena B Gumusoglu, Joel C. Geerling, Georgina M Aldridge. Renovating the Barnes maze for mouse models of Dementia with STARR FIELD: A 4-day protocol that probes learning rate, retention and cognitive flexibility. 2024 December. DOI: 10.1101/2024.11.30.625516.

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Jason Radley, Ryan Lingg, Shane Johnson, Dalton Hinz, Timothy Skog, Manuela Lizarazu, Sara Romig-Martin, Ryan LaLumiere, Nandakumar Narayanan. Prefrontal projections to the bed nuclei of the stria terminalis modulate the specificity of aversive memories. 2024 October. DOI: 10.21203/rs.3.rs-4241372/v1.

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R Austin Bruce, Matthew A Weber, Alexandra S Bova, Rachael A Volkman, Casey E Jacobs, Kartik Sivakumar, Hannah R Stutt, Young-cho Kim, Rodica Curtu, Nandakumar S Narayanan. Complementary cognitive roles for D2-MSNs and D1-MSNs during interval timing. 2024 November. DOI: 10.7554/eLife.96287.3.

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Oppman AM, Paradee WJ, Narayanan NS, Kim YC. Generation and validation of a D1 dopamine receptor Flpo knock-in mouse. J Neurosci Methods. 2025 Mar;415:110345. doi: 10.1016/j.jneumeth.2024.110345. Epub 2024 Dec 17. PubMed PMID: 39701542; PubMed Central PMCID: PMC11878109.

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Bruce R, Weber MA, Bova A, Volkman R, Jacobs C, Sivakumar K, Kim Y, Curtu R, Narayanan N. Complementary cognitive roles for D2-MSNs and D1-MSNs during interval timing. bioRxiv. 2024 Sep 6;. doi: 10.1101/2023.07.25.550569. PubMed PMID: 37546735; PubMed Central PMCID: PMC10402049.

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Narayanan NS, Jourahmad Z, Cole RC, Cavanagh JF. Cognition falters at ~4 Hz in Parkinson's disease. Trends Cogn Sci. 2024 Sep;28(9):789-791. doi: 10.1016/j.tics.2024.06.002. Epub 2024 Jul 12. PubMed PMID: 39003229; PubMed Central PMCID: PMC11458154.

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Weber MA, Narayanan NS. Sustained behaviour: Encoding of cumulative experience in the anterior cingulate. Curr Biol. 2024 Jul 8;34(13):R616-R618. doi: 10.1016/j.cub.2024.05.070. PubMed PMID: 38981423.

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Hart A, Aldridge G, Zhang Q, Narayanan NS, Simmering JE. Association of Terazosin, Doxazosin, or Alfuzosin Use and Risk of Dementia With Lewy Bodies in Men. Neurology. 2024 Jul 23;103(2):e209570. doi: 10.1212/WNL.0000000000209570. Epub 2024 Jun 19. PubMed PMID: 38896813; PubMed Central PMCID: PMC11226317.

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Spicer MM, Weber MA, Luo Z, Yang J, Narayanan NS, Fisher RA. Regulator of G protein signaling 6 (RGS6) in dopamine neurons promotes EtOH seeking, behavioral reward, and susceptibility to relapse. Psychopharmacology (Berl). 2024 Nov;241(11):2255-2269. doi: 10.1007/s00213-024-06631-8. Epub 2024 Jun 10. PubMed PMID: 38856764; PubMed Central PMCID: PMC11518640.

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Yeager BE, Twedt HP, Bruss J, Schultz J, Narayanan NS. Cortical and subcortical functional connectivity and cognitive impairment in Parkinson's disease. Neuroimage Clin. 2024;42:103610. doi: 10.1016/j.nicl.2024.103610. Epub 2024 Apr 25. PubMed PMID: 38677099; PubMed Central PMCID: PMC11066685.

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Stutt HR, Weber MA, Cole RC, Bova AS, Ding X, McMurrin MS, Narayanan NS. Sex similarities and dopaminergic differences in interval timing. Behav Neurosci. 2024 Apr;138(2):85-93. doi: 10.1037/bne0000577. PubMed PMID: 38661668; PubMed Central PMCID: PMC11512544.

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Wang Y, Gao JZ, Sakaguchi T, Maretzky T, Gurung P, Narayanan NS, Short S, Xiong Y, Kang Z. LRRK2 G2019S Promotes Colon Cancer Potentially via LRRK2-GSDMD Axis-Mediated Gut Inflammation. Cells. 2024 Mar 23;13(7). doi: 10.3390/cells13070565. PubMed PMID: 38607004; PubMed Central PMCID: PMC11011703.

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Hart AA, Swenson A, Narayanan NS, Simmering JE. Rurality modifies the association between symptoms and the diagnosis of amyotrophic lateral sclerosis. Amyotroph Lateral Scler Frontotemporal Degener. 2024 Aug;25(5-6):517-527. doi: 10.1080/21678421.2024.2315185. Epub 2024 Feb 14. PubMed PMID: 38353166; PubMed Central PMCID: PMC11840969.

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Keomanivong C, Schamp J, Tabakovic E, Thangavel R, Aldridge G, Pieper AA, Narayanan NS. Mice Expressing A53T/A30P Mutant Alpha-Synuclein in Dopamine Neurons Do Not Display Behavioral Deficits. eNeuro. 2024 Feb;11(2). doi: 10.1523/ENEURO.0170-23.2023. Print 2024 Feb. PubMed PMID: 38351057; PubMed Central PMCID: PMC10866330.

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Anjum MF, Espinoza AI, Cole RC, Singh A, May P, Uc EY, Dasgupta S, Narayanan NS. Resting-state EEG measures cognitive impairment in Parkinson's disease. NPJ Parkinsons Dis. 2024 Jan 3;10(1):6. doi: 10.1038/s41531-023-00602-0. PubMed PMID: 38172519; PubMed Central PMCID: PMC10764756.

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Alexander Hart, Georgina Aldridge, Qiang Zhang, Nandakumar S. Narayanan, Jacob E. Simmering. Lower risk of dementia with Lewy bodies among users of glycolysis enhancing drugs in a new user, active comparator design. 2023 December. DOI: 10.1101/2023.12.05.23299455.

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Arun Singh, Rachel C Cole, Arturo I Espinoza, Jan R Wessel, James F Cavanagh, Nandakumar S Narayanan. Evoked mid-frontal activity predicts cognitive dysfunction in Parkinson’s disease. Journal of Neurology, Neurosurgery & Psychiatry. 2023 November. doi: 10.1136/jnnp-2022-330154.

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Mackenzie M. Spicer, Matthew A. Weber, Zili Luo, Jianqi Yang, Nandakumar S. Narayanan, Rory A. Fisher. Regulator of G protein signaling 6 (RGS6) in ventral tegmental area (VTA) dopamine neurons promotes EtOH seeking, behavioral reward and susceptibility to relapse. 2023 October. DOI: 10.1101/2023.10.24.563844.

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Juan Vivanco-Suarez, Timothy Woodiwiss, Kimberly L. Fiock, Marco M. Hefti, Nandakumar S. Narayanan, Jeremy D. W. Greenlee. Neurohistopathological Findings of the Brain Parenchyma After Long-Term Deep Brain Stimulation: Case Series and Systematic Literature Review. 2023 November. DOI: 10.1101/2023.11.23.23298888.

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Matthew A. Weber, Kartik Sivakumar, Ervina E. Tabakovic, Mayu Oya, Georgina M. Aldridge, Qiang Zhang, Jacob E. Simmering, Nandakumar S. Narayanan. Glycolysis-enhancing α1-adrenergic antagonists modify cognitive symptoms related to Parkinson’s disease. npj Parkinson's Disease. 2023 March. doi: 10.1038/s41531-023-00477-1.

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Md Fahim Anjum, Arturo Espinoza, Rachel Cole, Arun Singh, Patrick May, Ergun Uc, Soura Dasgupta, Nandakumar Narayanan. Resting-state EEG measures cognitive impairment in Parkinson’s disease. 2023 March. DOI: 10.21203/rs.3.rs-2666578/v1.

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Shana Harris, Nandakumar S. Narayanan, Daniel Tranel. Does Black vs. White race affect practitioners’ appraisal of Parkinson’s disease?. npj Parkinson's Disease. 2023 July. doi: 10.1038/s41531-023-00549-2.

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Hannah R. Stutt, Matthew A. Weber, Rachael C. Cole, Alexandra S. Bova, Xin Ding, Madison S. McMurrin, Nandakumar S. Narayanan. Sex similarities and dopaminergic differences in interval timing. 2023 May. DOI: 10.1101/2023.05.05.539584.

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Matthew A. Weber, Gemma Kerr, Ramasamy Thangavel, Mackenzie M. Conlon, Hisham A. Abdelmotilib, Oday Halhouli, Qiang Zhang, Joel C. Geerling, Nandakumar S. Narayanan, Georgina M. Aldridge. Alpha-synuclein pre-formed fibrils injected into prefrontal cortex primarily spread to cortical and subcortical structures and lead to isolated behavioral symptoms. 2023 February. DOI: 10.1101/2023.01.31.526365.

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Cameron Keomanivong, Josephine Schamp, Ervina Tabakovic, Ramasamy Thangavel, Georgina Aldridge, Andrew A. Pieper, Nandakumar S. Narayanan. Mice expressing A53T / A30P mutant alpha-synuclein in dopamine neurons do not display behavioral deficits. 2023 May. DOI: 10.1101/2023.05.25.542172.

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Brooke E Yeager, Hunter P Twedt, Joel Bruss, Jordan Schultz, Nandakumar S Narayanan. Salience network and cognitive impairment in Parkinson’s disease. 2023 October. DOI: 10.1101/2023.10.13.23296825.

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Alexander A Hart, Andrea Swenson, Nandakumar S. Narayanan, Jacob E. Simmering. Rurality Modifies the Association Between Symptoms and the Diagnosis of Amyotrophic Lateral Sclerosis. 2023 October. DOI: 10.1101/2023.10.13.23297024.

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R. Austin Bruce, Matthew A. Weber, Alexandra S. Bova, Rachael A. Volkman, Casey E. Jacobs, Kartik Sivakumar, Hannah R Stutt, Young-cho Kim, Rodica Curtu, Nandakumar S. Narayanan. Complementary cognitive roles for D2-MSNs and D1-MSNs during interval timing. 2023 July. DOI: 10.1101/2023.07.25.550569.