Spencer Sterling Kellis

Title(s)Research Assistant Professor of Neurological Surgery
AddressMCH B-51
Health Sciences Campus
Los Angeles CA 90089
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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help. to make corrections and additions.
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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. Neuropathological effects of chronically implanted, intracortical microelectrodes in a tetraplegic patient. J Neural Eng. 2021 07 27; 18(4). Szymanski LJ, Kellis S, Liu CY, Jones KT, Andersen RA, Commins D, Lee B, McCreery DB, Miller CA. PMID: 34314384.
      View in: PubMed   Mentions:    Fields:    Translation:HumansAnimals
    2. Amygdaloid theta-band power increases during conflict processing in humans. J Clin Neurosci. 2021 Sep; 91:183-192. Tang AM, Chen KH, Gogia AS, Del Campo-Vera RM, Sebastian R, Gilbert ZD, Lee Y, Nune G, Liu CY, Kellis S, Lee B. PMID: 34373025.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    3. Neuromodulation in Beta-Band Power Between Movement Execution and Inhibition in the Human Hippocampus. Neuromodulation. 2021 Jul 05. Del Campo-Vera RM, Tang AM, Gogia AS, Chen KH, Sebastian R, Gilbert ZD, Nune G, Liu CY, Kellis S, Lee B. PMID: 34224647.
      View in: PubMed   Mentions:    Fields:    
    4. Hippocampal and Orbitofrontal Theta Band Coherence Diminishes During Conflict Resolution. World Neurosurg. 2021 08; 152:e32-e44. Tang AM, Chen KH, Del Campo-Vera RM, Sebastian R, Gogia AS, Nune G, Liu CY, Kellis S, Lee B. PMID: 33872837.
      View in: PubMed   Mentions:    Fields:    
    5. The Neurophysiological Representation of Imagined Somatosensory Percepts in Human Cortex. J Neurosci. 2021 03 10; 41(10):2177-2185. Bashford L, Rosenthal I, Kellis S, Pejsa K, Kramer D, Lee B, Liu C, Andersen RA. PMID: 33483431.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    6. The human primary somatosensory cortex encodes imagined movement in the absence of sensory information. Commun Biol. 2020 12 11; 3(1):757. Jafari M, Aflalo T, Chivukula S, Kellis SS, Salas MA, Norman SL, Pejsa K, Liu CY, Andersen RA. PMID: 33311578.
      View in: PubMed   Mentions:
    7. SpikeDeep-Classifier: A deep-learning based fully automatic offline spike sorting algorithm. J Neural Eng. 2020 Nov 09. Saif-Ur-Rehman M, Ali O, Dyck S, Lienkämper R, Metzler M, Parpaley Y, Wellmer J, Liu C, Lee B, Kellis S, Andersen RA, Iossifidis I, Glasmachers T, Klaes C. PMID: 33166944.
      View in: PubMed   Mentions: 1     Fields:    
    8. Beta-band modulation in the human hippocampus during a conflict response task. J Neural Eng. 2020 Oct 15. Chen KH, Gogia AS, Tang A, Martin Del Campo-Vera R, Sebastian R, Nune G, Wong J, Liu C, Kellis S, Lee B. PMID: 33059331.
      View in: PubMed   Mentions: 2     Fields:    
    9. Gamma-band modulation in the human amygdala during reaching movements. Neurosurg Focus. 2020 07; 49(1):E4. Gogia AS, Martin Del Campo-Vera R, Chen KH, Sebastian R, Nune G, Kramer DR, Lee MB, Tafreshi AR, Barbaro MF, Liu CY, Kellis S, Lee B. PMID: 32610288.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    10. Thermal Analysis of a Skull Implant in Brain-Computer Interfaces. Annu Int Conf IEEE Eng Med Biol Soc. 2020 07; 2020:3066-3069. Serrano-Amenos C, Hu F, Wang PT, Kellis S, Andersen RA, Liu CY, Heydari P, Do AH, Nenadic Z. PMID: 33018652.
      View in: PubMed   Mentions:
    11. A Prototype of a Fully-Implantable Charge-Balanced Artificial Sensory Stimulator for Bi-directional Brain-Computer-Interface (BD-BCI). Annu Int Conf IEEE Eng Med Biol Soc. 2020 07; 2020:3083-3085. Sohn WJ, Wang PT, Kellis S, Andersen RA, Liu CY, Heydari P, Nenadic Z, Do AH. PMID: 33018656.
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    12. Beta-band power modulation in the human hippocampus during a reaching task. J Neural Eng. 2020 06 12; 17(3):036022. Del Campo-Vera RM, Gogia AS, Chen KH, Sebastian R, Kramer DR, Lee MB, Peng T, Tafreshi A, Barbaro MF, Liu CY, Kellis S, Lee B. PMID: 32413878.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    13. Comparison of Intraoperative 3-Dimensional Fluoroscopy With Standard Computed Tomography for Stereotactic Frame Registration. Oper Neurosurg (Hagerstown). 2020 06 01; 18(6):698-709. Peng T, Kramer DR, Lee MB, Barbaro MF, Ding L, Liu CY, Kellis S, Lee B. PMID: 31584102.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    14. Optimal artifact suppression in simultaneous electrocorticography stimulation and recording for bi-directional brain-computer interface applications. J Neural Eng. 2020 04 29; 17(2):026038. Pu H, Lim J, Kellis S, Liu CY, Andersen RA, Do AH, Heydari P, Nenadic Z. PMID: 32208379.
      View in: PubMed   Mentions:    Fields:    
    15. A Phantom Study of the Spatial Precision and Accuracy of Stereotactic Localization Using Computed Tomography Imaging with the Leksell Stereotactic System. World Neurosurg. 2020 07; 139:e297-e307. Tafreshi AR, Peng T, Yu C, Kramer DR, Gogia AS, Lee MB, Barbaro MF, Sebastian R, Del Campo-Vera RM, Chen KH, Kellis SS, Lee B. PMID: 32298832.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    16. Mapping of primary somatosensory cortex of the hand area using a high-density electrocorticography grid for closed-loop brain computer interface. J Neural Eng. 2020 Mar 04. Kramer DR, Lee MB, Barbaro M, Gogia AS, Peng T, Liu C, Kellis S, Lee B. PMID: 32131064.
      View in: PubMed   Mentions: 1     Fields:    
    17. Utility and lower limits of frequency detection in surface electrode stimulation for somatosensory brain-computer interface in humans. Neurosurg Focus. 2020 02 01; 48(2):E2. Kramer DR, Lamorie-Foote K, Barbaro M, Lee MB, Peng T, Gogia A, Nune G, Liu CY, Kellis SS, Lee B. PMID: 32006952.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    18. From thought to action: The brain-machine interface in posterior parietal cortex. Proc Natl Acad Sci U S A. 2019 Dec 23. Andersen RA, Aflalo T, Kellis S. PMID: 31871144.
      View in: PubMed   Mentions: 3     Fields:    
    19. Functional Frequency Discrimination From Cortical Somatosensory Stimulation in Humans. Front Neurosci. 2019; 13:832. Kramer DR, Lamorie-Foote K, Barbaro M, Lee M, Peng T, Gogia A, Liu CY, Kellis SS, Lee B. PMID: 31440133.
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    20. Clinical neuroprosthetics: Today and tomorrow. J Clin Neurosci. 2019 Oct; 68:13-19. Lee MB, Kramer DR, Peng T, Barbaro MF, Liu CY, Kellis S, Lee B. PMID: 31375306.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    21. SpikeDeeptector: a deep-learning based method for detection of neural spiking activity. J Neural Eng. 2019 07 23; 16(5):056003. Saif-Ur-Rehman M, Lienkämper R, Parpaley Y, Wellmer J, Liu C, Lee B, Kellis S, Andersen R, Iossifidis I, Glasmachers T, Klaes C. PMID: 31042684.
      View in: PubMed   Mentions: 4     Fields:    Translation:HumansCellsCTClinical Trials
    22. Directional tuning during reach planning in the supramarginal gyrus using local field potentials. J Clin Neurosci. 2019 Jun; 64:214-219. Barbaro MF, Kramer DR, Nune G, Lee MB, Peng T, Liu CY, Kellis S, Lee B. PMID: 31023574.
      View in: PubMed   Mentions:    Fields:    Translation:HumansCells
    23. Electrocorticographic changes in field potentials following natural somatosensory percepts in humans. Exp Brain Res. 2019 May; 237(5):1155-1167. Kramer DR, Barbaro MF, Lee M, Peng T, Nune G, Liu CY, Kellis S, Lee B. PMID: 30796470.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    24. Brain-Computer Interfaces in Quadriplegic Patients. Neurosurg Clin N Am. 2019 Apr; 30(2):275-281. Lee MB, Kramer DR, Peng T, Barbaro MF, Liu CY, Kellis S, Lee B. PMID: 30898278.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    25. Technical considerations for generating somatosensation via cortical stimulation in a closed-loop sensory/motor brain-computer interface system in humans. J Clin Neurosci. 2019 May; 63:116-121. Kramer DR, Kellis S, Barbaro M, Salas MA, Nune G, Liu CY, Andersen RA, Lee B. PMID: 30711286.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    26. Engineering Artificial Somatosensation Through Cortical Stimulation in Humans. Front Syst Neurosci. 2018; 12:24. Lee B, Kramer D, Armenta Salas M, Kellis S, Brown D, Dobreva T, Klaes C, Heck C, Liu C, Andersen RA. PMID: 29915532.
      View in: PubMed   Mentions:
    27. Utilizing Light-field Imaging Technology in Neurosurgery. Cureus. 2018 Apr 10; 10(4):e2459. Chen BR, Buchanan IA, Kellis S, Kramer D, Ohiorhenuan I, Blumenfeld Z, Grisafe Ii DJ, Barbaro MF, Gogia AS, Lu JY, Chen BB, Lee B. PMID: 29888163.
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    28. Proprioceptive and cutaneous sensations in humans elicited by intracortical microstimulation. Elife. 2018 04 10; 7. Armenta Salas M, Bashford L, Kellis S, Jafari M, Jo H, Kramer D, Shanfield K, Pejsa K, Lee B, Liu CY, Andersen RA. PMID: 29633714.
      View in: PubMed   Mentions: 28     Fields:    Translation:Humans
    29. Non ictal onset zone: A window to ictal dynamics. Epilepsy Behav Case Rep. 2017; 8:123-127. Afra P, Hanrahan SJ, Kellis SS, House P. PMID: 29204348.
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    30. Multivariate regression methods for estimating velocity of ictal discharges from human microelectrode recordings. J Neural Eng. 2017 08; 14(4):044001. Liou JY, Smith EH, Bateman LM, McKhann GM, Goodman RR, Greger B, Davis TS, Kellis SS, House PA, Schevon CA. PMID: 28332484.
      View in: PubMed   Mentions: 7     Fields:    Translation:Humans
    31. The ictal wavefront is the spatiotemporal source of discharges during spontaneous human seizures. Nat Commun. 2016 Mar 29; 7:11098. Smith EH, Liou JY, Davis TS, Merricks EM, Kellis SS, Weiss SA, Greger B, House PA, McKhann GM, Goodman RR, Emerson RG, Bateman LM, Trevelyan AJ, Schevon CA. PMID: 27020798.
      View in: PubMed   Mentions: 43     Fields:    Translation:Humans
    32. Hand Shape Representations in the Human Posterior Parietal Cortex. J Neurosci. 2015 Nov 18; 35(46):15466-76. Klaes C, Kellis S, Aflalo T, Lee B, Pejsa K, Shanfield K, Hayes-Jackson S, Aisen M, Heck C, Liu C, Andersen RA. PMID: 26586832.
      View in: PubMed   Mentions: 17     Fields:    Translation:HumansCells
    33. Multi-scale analysis of neural activity in humans: Implications for micro-scale electrocorticography. Clin Neurophysiol. 2016 Jan; 127(1):591-601. Kellis S, Sorensen L, Darvas F, Sayres C, O'Neill K, Brown RB, House P, Ojemann J, Greger B. PMID: 26138146.
      View in: PubMed   Mentions: 23     Fields:    Translation:Humans
    34. Neurophysiology. Decoding motor imagery from the posterior parietal cortex of a tetraplegic human. Science. 2015 May 22; 348(6237):906-10. Aflalo T, Kellis S, Klaes C, Lee B, Shi Y, Pejsa K, Shanfield K, Hayes-Jackson S, Aisen M, Heck C, Liu C, Andersen RA. PMID: 25999506.
      View in: PubMed   Mentions: 118     Fields:    Translation:HumansCells
    35. Parietal neural prosthetic control of a computer cursor in a graphical-user-interface task. J Neural Eng. 2014 Dec; 11(6):066014. Revechkis B, Aflalo TN, Kellis S, Pouratian N, Andersen RA. PMID: 25394419.
      View in: PubMed   Mentions: 3     Fields:    Translation:Animals
    36. Toward more versatile and intuitive cortical brain-machine interfaces. Curr Biol. 2014 Sep 22; 24(18):R885-R897. Andersen RA, Kellis S, Klaes C, Aflalo T. PMID: 25247368.
      View in: PubMed   Mentions: 26     Fields:    Translation:Humans
    37. A cognitive neuroprosthetic that uses cortical stimulation for somatosensory feedback. J Neural Eng. 2014 Oct; 11(5):056024. Klaes C, Shi Y, Kellis S, Minxha J, Revechkis B, Andersen RA. PMID: 25242377.
      View in: PubMed   Mentions: 31     Fields:    Translation:Animals
    38. Potential for unreliable interpretation of EEG recorded with microelectrodes. Epilepsia. 2013 Aug; 54(8):1391-401. Stacey WC, Kellis S, Greger B, Butson CR, Patel PR, Assaf T, Mihaylova T, Glynn S. PMID: 23647099.
      View in: PubMed   Mentions: 9     Fields:    Translation:Humans
    39. Decoding stimulus identity from multi-unit activity and local field potentials along the ventral auditory stream in the awake primate: implications for cortical neural prostheses. J Neural Eng. 2013 Feb; 10(1):016010. Smith E, Kellis S, House P, Greger B. PMID: 23283406.
      View in: PubMed   Mentions: 7     Fields:    Translation:Animals
    40. Signal distortion from microelectrodes in clinical EEG acquisition systems. J Neural Eng. 2012 Oct; 9(5):056007. Stacey WC, Kellis S, Patel PR, Greger B, Butson CR. PMID: 22878608.
      View in: PubMed   Mentions: 6     Fields:    Translation:Humans
    41. Decoding hand trajectories from micro-electrocorticography in human patients. Annu Int Conf IEEE Eng Med Biol Soc. 2012; 2012:4091-4. Kellis S, Hanrahan S, Davis T, House PA, Brown R, Greger B. PMID: 23366827.
      View in: PubMed   Mentions:
    42. Information transfer along the ventral auditory processing stream in the awake macaque. Annu Int Conf IEEE Eng Med Biol Soc. 2012; 2012:5178-81. Smith EH, Kellis SS, House PA, Greger B. PMID: 23367095.
      View in: PubMed   Mentions:
    43. Platinum microwire for subdural electrocorticography over human neocortex: millimeter-scale spatiotemporal dynamics. Annu Int Conf IEEE Eng Med Biol Soc. 2011; 2011:4761-5. Kellis S, Greger B, Hanrahan S, House P, Brown R. PMID: 22255402.
      View in: PubMed   Mentions:
    44. Decoding spoken words using local field potentials recorded from the cortical surface. J Neural Eng. 2010 Oct; 7(5):056007. Kellis S, Miller K, Thomson K, Brown R, House P, Greger B. PMID: 20811093.
      View in: PubMed   Mentions: 67     Fields:    Translation:Humans
    45. Classification of spoken words using surface local field potentials. Annu Int Conf IEEE Eng Med Biol Soc. 2010; 2010:3827-30. Kellis S, Miller K, Thomson K, Brown R, House P, Greger B. PMID: 21097062.
      View in: PubMed   Mentions:
    46. Human neocortical electrical activity recorded on nonpenetrating microwire arrays: applicability for neuroprostheses. Neurosurg Focus. 2009 Jul; 27(1):E9. Kellis SS, House PA, Thomson KE, Brown R, Greger B. PMID: 19569897.
      View in: PubMed   Mentions: 19     Fields:    Translation:Humans
    47. Multi-scale recordings for neuroprosthetic control of finger movements. Annu Int Conf IEEE Eng Med Biol Soc. 2009; 2009:4573-7. Baker J, Bishop W, Kellis S, Levy T, House P, Greger B. PMID: 19963841.
      View in: PubMed   Mentions:
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