Vasileios Christopoulos

Title(s)Assistant Professor of Biomedical Engineering
SchoolViterbi School of Engineering, Bme
Address1042 Downey Way
University Park Campus
Los Angeles CA 90089
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    Altmetrics Details PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Chronic subthreshold rTMS transiently disrupts learning but enhances memory and flexibility in healthy rats. J Neural Eng. 2026 Sep 25; 23(5). Jiang W, Choi W, Hsu C, Lau I, McHugh M, Sun C, Li VZ, Messay M, Lin J, Wu M, Lee A, Lu Z, Jin Z, Isenhart R, Lee DJ, Tashli M, Lohr W, Hadimani RL, Liu CY, Song D. PMID: 42710530.
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    2. Duration-modulated neural population dynamics in humans during BMI controls. Commun Biol. 2026 Jun 26. Yin F, Guan C, Aflalo T, Gamez J, Pejsa K, Rosario E, Liu C, Bari A, Andersen RA. PMID: 42362714.
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    3. Neuromodulatory strategies overcome multiple inevitable impairments of cerebral palsy. J Neurophysiol. 2026 Aug 01; 136(2):445-458. Hastings SD, Zhong H, Kijima K, Gonnella C, Gonnella J, Lee DJ, Liu C, Gerasimenko YP, Edgerton VR, Johnson CA. PMID: 42333782.
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    4. Spooky action at a distance: neuromodulation, physiologic distress signals, and limb preservation. Burns Trauma. 2026; 14:tkag017. Raihane AS, Deusch GM, Liu C, Najafi B, Deng W, Dark NG, Armstrong DG. PMID: 42441071; PMCID: PMC13335646.
      View in: PubMed   Mentions:
    5. Intraspinal Microstimulation of Dorsolateral Funiculus for Coordinated Bladder Control. IEEE Trans Neural Syst Rehabil Eng. 2026; 34:1650-1657. Zhong S, Watkins E, Maggi A, Zhong H, Lo YT, Kreydin E, Lee D, Liu C, Christopoulos V. PMID: 41855055.
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    6. Charge density of multi-channel intra-cortical micro-stimulation modulates intensity and naturalness of evoked somatosensations. J Neural Eng. 2025 12 12; 22(6). Bjånes DA, Bashford L, Pejsa K, Lee B, Liu CY, Andersen RA. PMID: 41191971.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    7. Hierarchical and Context-Dependent Encoding of Actions in Human Posterior Parietal and Motor Cortex. bioRxiv. 2025 Nov 13. Bougou V, Gamez J, Rosario ER, Liu C, Pejsa K, Bari A, Andersen RA. PMID: 41293018; PMCID: PMC12642601.
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    8. Cerebral Perfusion and Blood-Brain Barrier Changes After Cranioplasty: A Diffusion-Prepared Arterial Spin Labeling Study. J Neuroimaging. 2025 Nov-Dec; 35(6):e70106. Ojogho B, Abedi A, Lee DJ, Shao X, Russin J, Jann K, Liu CY, Wang DJJ. PMID: 41239816; PMCID: PMC12619081.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    9. Assessing human scalp and brain blood flow sensitivities via superficial temporal artery occlusion using speckle contrast optical spectroscopy. APL Bioeng. 2025 Dec; 9(4):046106. Huang YX, Mahler S, Dickson M, Abedi A, Lo YT, Lyden PD, Russin J, Liu C, Yang C. PMID: 41132907; PMCID: PMC12543367.
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    10. Visual context affects the perceived timing of tactile sensations elicited through intracortical microstimulation: a case study of two participants. J Neurophysiol. 2025 Nov 01; 134(5):1785-1803. Rosenthal IA, Bashford L, Bjånes D, Pejsa K, Lee B, Liu C, Andersen RA. PMID: 41060788; PMCID: PMC12676579.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    11. Functional ultrasound neuroimaging reveals mesoscopic organization of saccades in the lateral intraparietal area. Nat Commun. 2025 Oct 01; 16(1):8752. Griggs WS, Norman SL, Tanter M, Liu C, Christopoulos V, Shapiro MG, Andersen RA. PMID: 41034219; PMCID: PMC12488887.
      View in: PubMed   Mentions: 2     Fields:    Translation:Animals
    12. Functional ultrasound imaging combined with machine learning for whole-brain analysis of drug-induced hemodynamic changes. Imaging Neurosci (Camb). 2025; 3. Deighton J, Zhong S, Agyeman K, Choi W, Y Liu C, J Lee D, Maroulas V, N Christopoulos V. . PMID: 40948602; PMCID: PMC12423641.
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    13. Directional hand movement can be classified from insular cortex SEEG signals using recurrent neural networks and high-gamma band features. Sci Rep. 2025 Aug 16; 15(1):29993. Shao X, Chung RS, Cavaleri JM, Del Campo-Vera RM, Parra M, Sundaram S, Zhang S, Surabhi A, McGinn RJ, Liu CY, Kellis SS, Lee B. PMID: 40819020; PMCID: PMC12357955.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    14. Significant seizure frequency reduction in a patient with refractory bitemporal epilepsy following transition from high-frequency to low-frequency responsive neurostimulation. Epilepsy Behav Rep. 2025 Dec; 32:100822. Kim S, Benny C, Salim A, Liu C, Lee B, Kunhi Veedu HP. PMID: 40894394; PMCID: PMC12392759.
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    15. Human spinal cord activation during filling and emptying of the bladder. Nat Commun. 2025 Jul 15; 16(1):6506. Agyeman KA, Lee DJ, Abedi A, Sakellaridi S, Kreydin EI, Russin J, Lo YT, Wu K, Choi W, Iyer S, Edgerton VR, Liu CY, Christopoulos VN. PMID: 40664673; PMCID: PMC12264007.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    16. Beta-band desynchronization in the human hippocampus during movement preparation in a delayed reach task. Exp Brain Res. 2025 Jun 23; 243(7):180. Shao X, Chung RS, Sundaram S, Martin Del Campo-Vera R, Cavaleri J, Zhang S, Swarup A, Kammen A, Parra M, Mason X, Heck C, Liu CY, Kellis SS, Lee B. PMID: 40549177; PMCID: PMC12185599.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    17. Comparative evaluation of image registration techniques in functional ultrasound imaging. Imaging Neurosci (Camb). 2025; 3. Zhong S, Agyeman K, Syed S, Tobing R, Choi W, Liu C, Lee D, Christopoulos V. PMID: 40800915; PMCID: PMC12319969.
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    18. Functional ultrasound imaging and prewhitening analysis reveal MK-801-induced disruption of brain network connectivity. Front Pharmacol. 2025; 16:1562102. Hakopian E, Stepanian AE, Zhong S, Agyeman KA, Zepeda N, Wu K, Liu C, Lee DJ, Christopoulos V. PMID: 40529501; PMCID: PMC12170528.
      View in: PubMed   Mentions: 2  
    19. The challenges in establishing and Upholding an adult Level III epilepsy center in an underserved area in the United states. Epilepsy Behav Rep. 2025 Sep; 31:100779. Dao KT, Chacko C, Braich S, Liu L, Zalmay N, Nguyen C, Radhakrishnan K, Liu CY, Kunhi-Veedu HP. PMID: 40491868; PMCID: PMC12146518.
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    20. Beta-band power modulation in the human amygdala during a Direct Reach arm reaching task. Neurosci Res. 2025 Jul; 216:104906. Cavaleri J, Sundaram S, Del Campo-Vera RM, Shao X, Chung RS, Parra M, Swarup A, Zhang S, Kammen A, Gogia A, Mason X, McGinn R, Heck C, Liu CY, Kellis SS, Lee B. PMID: 40360082; PMCID: PMC12288141.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    21. Long-Term Outcomes of Vagus Nerve Stimulation Paired With Upper Extremity Rehabilitation After Stroke. Stroke. 2025 Aug; 56(8):2255-2265. Kimberley TJ, Cramer SC, Wolf SL, Liu C, Gochyyev P, Dawson J, VNS-REHAB Trial Group. PMID: 40329913.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    22. Neural Mechanisms of Poststroke Urinary Incontinence: Results From an fMRI Study. Stroke. 2025 Jun; 56(6):1516-1527. Kreydin EI, Abedi A, Morales L, Montero S, Kohli P, Ha N, Chapman D, Abedi A, Ginsberg D, Jann K, Harvey RL, Liu CY. PMID: 40207355.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    23. Repair, Regeneration, and Replacement, Revisited (Redux). J Diabetes Sci Technol. 2025 May; 19(3):605-610. Armstrong DG, Najafi B, Gao W, Klonoff DC, Liu C. PMID: 40088132; PMCID: PMC11910732.
      View in: PubMed   Mentions:    Fields:    
    24. Quantifying physical degradation alongside recording and stimulation performance of 980 intracortical microelectrodes chronically implanted in three humans for 956-2130 days. Acta Biomater. 2025 05 15; 198:188-206. Bjånes DA, Kellis S, Nickl R, Baker B, Aflalo T, Bashford L, Chivukula S, Fifer MS, Osborn LE, Christie B, Wester BA, Celnik PA, Kramer D, Pejsa K, Crone NE, Anderson WS, Pouratian N, Lee B, Liu CY, Tenore FV, Rieth L, Andersen RA. PMID: 40037510; PMCID: PMC12282554.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    25. Beta-band power modulation in the human amygdala during a delayed reach task. J Clin Neurosci. 2025 May; 135:111151. Sundaram S, Shao X, Chung RS, Martin Del Campo Vera R, Cavaleri J, Parra M, Zhang S, Swarup A, Kammen A, Heck C, Liu CY, Kellis SS, Lee B. PMID: 40020562.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    26. Cervical spinal cord stimulation for treatment of upper limb paralysis: a narrative review. J Hand Surg Eur Vol. 2025 06; 50(6):781-795. Lo YT, Lam JL, Jiang L, Lam WL, Edgerton VR, Liu CY. PMID: 39932700.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    27. Computational mechanism underlying switching of motor actions. PLoS Comput Biol. 2025 02; 21(2):e1012811. Zhong S, Pouratian N, Christopoulos V. PMID: 39928670; PMCID: PMC11875378.
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    28. Portable six-channel laser speckle system for simultaneous measurement of cerebral blood flow and volume with potential applications in characterization of brain injury. Neurophotonics. 2025 Jan; 12(1):015003. Mahler S, Huang YX, Ismagilov M, Álvarez-Chou D, Abedi A, Tyszka JM, Lo YT, Russin J, Pantera RL, Liu C, Yang C. PMID: 39867132; PMCID: PMC11758243.
      View in: PubMed   Mentions: 1  
    29. Exploring the Feasibility of Bidirectional Spinal Cord Machine Interface Through Sensing and Stimulation of Axonal Bundles. IEEE Trans Neural Syst Rehabil Eng. 2025; 33:2004-2012. Lo YT, Maggi A, Wu K, Zhong H, Choi W, Nguyen TD, Abedi A, Agyeman K, Sakellaridi S, Reggie Edgerton V, Kreydin E, Lee D, Sideris C, Liu CY, Christopoulos VN. PMID: 40372852.
      View in: PubMed   Mentions:    Fields:    Translation:AnimalsCells
    30. Using Functional Magnetic Resonance Imaging to Detect Differences in Micturition-Related Brain Activity Between Volitional and Involuntary Detrusor Contractions. Neurourol Urodyn. 2025 Feb; 44(2):374-381. Ha NT, Abedi A, Ojeda LAM, Montero S, Kohli P, Chapman D, Abedi A, Gaburak P, Ginsberg D, Harvey RL, Liu CY, Jann K, Kreydin E. PMID: 39737577.
      View in: PubMed   Mentions: Translation:Humans
    31. Association that Neuroimaging and Clinical Measures Have with Change in Arm Impairment in a Phase 3 Stroke Recovery Trial. Ann Neurol. 2025 04; 97(4):709-719. Schwarz A, Feldman M, Le V, Dawson J, Liu CY, Francisco GE, Wolf SL, Dixit A, Alexander J, Ali R, Brown BL, Feng W, DeMark L, Hochberg LR, Kautz SA, Majid A, O'Dell MW, Redgrave J, Turner DL, Kimberley TJ, Cramer SC. PMID: 39676623.
      View in: PubMed   Mentions: 1     Fields:    Translation:HumansCTClinical Trials
    32. Correlating stroke risk with non-invasive cerebrovascular perfusion dynamics using a portable speckle contrast optical spectroscopy laser device. Biomed Opt Express. 2024 Oct 01; 15(10):6083-6097. Huang YX, Mahler S, Abedi A, Tyszka JM, Lo YT, Lyden PD, Russin J, Liu C, Yang C. PMID: 39421763; PMCID: PMC11482158.
      View in: PubMed   Mentions: 6  
    33. Beta-band power modulation in the human amygdala differentiates between go/no-go responses in an arm-reaching task. J Neural Eng. 2024 07 16; 21(4). Chung RS, Martin Del Campo Vera R, Sundaram S, Cavaleri J, Gilbert ZD, Leonor A, Shao X, Zhang S, Kammen A, Mason X, Heck C, Liu CY, Kellis SS, Lee B. PMID: 38959877; PMCID: PMC11369913.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    34. Beta-band power classification of go/no-go arm-reaching responses in the human hippocampus. J Neural Eng. 2024 07 15; 21(4). Martin Del Campo Vera R, Sundaram S, Lee R, Lee Y, Leonor A, Chung RS, Shao A, Cavaleri J, Gilbert ZD, Zhang S, Kammen A, Mason X, Heck C, Liu CY, Kellis S, Lee B. PMID: 38914073; PMCID: PMC11247508.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    35. Functional ultrasound neuroimaging reveals mesoscopic organization of saccades in the lateral intraparietal area of posterior parietal cortex. bioRxiv. 2024 Jul 02. Griggs WS, Norman SL, Tanter M, Liu C, Christopoulos V, Shapiro MG, Andersen RA. PMID: 39005362; PMCID: PMC11244887.
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    36. Early feasibility of an embedded bi-directional brain-computer interface for ambulation. Annu Int Conf IEEE Eng Med Biol Soc. 2024 Jul; 2024:1-5. Lim J, Wang PT, Joon Sohn W, Serrano-Amenos C, Ibrahim M, Lin D, Thaploo S, Shaw SJ, Armacost M, Gong H, Lee B, Lee D, Andersen RA, Heydari P, Liu CY, Nenadic Z, Do AH. PMID: 40039379.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    37. Compact and cost-effective laser-powered speckle contrast optical spectroscopy fiber-free device for measuring cerebral blood flow. J Biomed Opt. 2024 06; 29(6):067001. Huang YX, Mahler S, Dickson M, Abedi A, Tyszka JM, Lo YT, Russin J, Liu C, Yang C. PMID: 38826808; PMCID: PMC11140771.
      View in: PubMed   Mentions: 9     Fields:    Translation:Humans
    38. Functional ultrasound imaging of human brain activity through an acoustically transparent cranial window. Sci Transl Med. 2024 05 29; 16(749):eadj3143. Rabut C, Norman SL, Griggs WS, Russin JJ, Jann K, Christopoulos V, Liu C, Andersen RA, Shapiro MG. PMID: 38809965.
      View in: PubMed   Mentions: 17     Fields:    Translation:HumansAnimals
    39. Representation of internal speech by single neurons in human supramarginal gyrus. Nat Hum Behav. 2024 Jun; 8(6):1136-1149. Wandelt SK, Bjånes DA, Pejsa K, Lee B, Liu C, Andersen RA. PMID: 38740984; PMCID: PMC11199147.
      View in: PubMed   Mentions: 20     Fields:    Translation:HumansCells
    40. Understanding the human conflict processing network: A review of the literature on direct neural recordings during performance of a modified stroop task. Neurosci Res. 2024 Sep; 206:1-19. Chung RS, Cavaleri J, Sundaram S, Gilbert ZD, Del Campo-Vera RM, Leonor A, Tang AM, Chen KH, Sebastian R, Shao A, Kammen A, Tabarsi E, Gogia AS, Mason X, Heck C, Liu CY, Kellis SS, Lee B. PMID: 38582242.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    41. Theta-frequency medial septal nucleus deep brain stimulation increases neurovascular activity in MK-801-treated mice. Front Neurosci. 2024; 18:1372315. Crown LM, Agyeman KA, Choi W, Zepeda N, Iseri E, Pahlavan P, Siegel SJ, Liu C, Christopoulos V, Lee DJ. PMID: 38560047; PMCID: PMC10978728.
      View in: PubMed   Mentions: 4  
    42. Functional ultrasound imaging of the human spinal cord. Neuron. 2024 05 15; 112(10):1710-1722.e3. Agyeman KA, Lee DJ, Russin J, Kreydin EI, Choi W, Abedi A, Lo YT, Cavaleri J, Wu K, Edgerton VR, Liu C, Christopoulos VN. PMID: 38458198.
      View in: PubMed   Mentions: 9     Fields:    Translation:Humans
    43. Neuromodulation of Eating Disorders: A Review of Underlying Neural Network Activity and Neuromodulatory Treatments. Brain Sci. 2024 Feb 22; 14(3). Wu K, Lo YT, Cavaleri J, Bergosh M, Ipe J, Briggs RG, Jann KB, Murray SB, Mason XL, Liu CY, Lee DJ. PMID: 38539589; PMCID: PMC10968923.
      View in: PubMed   Mentions: 7  
    44. Developing a hippocampal neural prosthetic to facilitate human memory encoding and recall of stimulus features and categories. Front Comput Neurosci. 2024; 18:1263311. Roeder BM, She X, Dakos AS, Moore B, Wicks RT, Witcher MR, Couture DE, Laxton AW, Clary HM, Popli G, Liu C, Lee B, Heck C, Nune G, Gong H, Shaw S, Marmarelis VZ, Berger TW, Deadwyler SA, Song D, Hampson RE. PMID: 38390007; PMCID: PMC10881797.
      View in: PubMed   Mentions: 3  
    45. Reply by Authors. J Urol. 2024 02; 211(2):304. Kreydin EI, Abedi A, Montero VS, Morales L, Jen R, Perez L, La Riva A, Kohli P, Liu CY, Ginsberg DA, Gad P, Edgerton VR, Jann K. PMID: 38193414.
      View in: PubMed   Mentions:    Fields:    
    46. Primary somatosensory cortex organization for engineering artificial somatosensation. Neurosci Res. 2024 Jul; 204:1-13. Lamorie-Foote K, Kramer DR, Sundaram S, Cavaleri J, Gilbert ZD, Tang AM, Bashford L, Liu CY, Kellis S, Lee B. PMID: 38278220.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    47. Decoding motor plans using a closed-loop ultrasonic brain-machine interface. Nat Neurosci. 2024 Jan; 27(1):196-207. Griggs WS, Norman SL, Deffieux T, Segura F, Osmanski BF, Chau G, Christopoulos V, Liu C, Tanter M, Shapiro MG, Andersen RA. PMID: 38036744; PMCID: PMC10774125.
      View in: PubMed   Mentions: 21     Fields:    Translation:HumansAnimals
    48. Zinc deficiency impairs axonal regeneration and functional recovery after spinal cord injury by modulating macrophage polarization via NF-κB pathway. Front Immunol. 2023; 14:1290100. Kijima K, Ono G, Kobayakawa K, Saiwai H, Hara M, Yoshizaki S, Yokota K, Saito T, Tamaru T, Iura H, Haruta Y, Kitade K, Utsunomiya T, Konno D, Edgerton VR, Liu CY, Sakai H, Maeda T, Kawaguchi K, Matsumoto Y, Okada S, Nakashima Y. PMID: 38022538; PMCID: PMC10666775.
      View in: PubMed   Mentions: 9     Fields:    Translation:AnimalsCells
    49. A Pilot Study of the Effect of Transcutaneous Spinal Cord Stimulation on Micturition-Related Brain Activity and Lower Urinary Tract Symptoms After Stroke. J Urol. 2024 02; 211(2):294-304. Kreydin EI, Abedi A, Montero VS, Morales L, Jen R, Perez L, La Riva A, Kohli P, Liu CY, Ginsberg DA, Gad P, Edgerton VR, Jann K. PMID: 37930962.
      View in: PubMed   Mentions: 4     Fields:    Translation:Humans
    50. A window to the brain: ultrasound imaging of human neural activity through a permanent acoustic window. bioRxiv. 2023 Jun 15. Rabut C, Norman SL, Griggs WS, Russin JJ, Jann K, Christopoulos V, Liu C, Andersen RA, Shapiro MG. PMID: 37398368; PMCID: PMC10312699.
      View in: PubMed   Mentions: 1  
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