Spencer Kellis • USC Profiles

Spencer Sterling Kellis

Title(s)	Research Assistant Professor of Neurological Surgery
School	Keck School of Medicine of Usc
Address	MCH B-51 Health Sciences Campus Los Angeles CA 90089
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Publications

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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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.

Baseline hippocampal beta band power is lower in the presence of movement uncertainty. J Neural Eng. 2022 07 22; 19(4). Gilbert ZD, Martin Del Campo-Vera R, Tang AM, Chen KH, Sebastian R, Shao A, Tabarsi E, Chung RS, Leonor A, Sundaram S, Heck C, Nune G, Liu CY, Kellis S, Lee B. PMID: 35803209; PMCID: PMC9376116.

View in: PubMed Mentions: Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Humans
Decoding grasp and speech signals from the cortical grasp circuit in a tetraplegic human. Neuron. 2022 06 01; 110(11):1777-1787.e3. Wandelt SK, Kellis S, Bjånes DA, Pejsa K, Lee B, Liu C, Andersen RA. PMID: 35364014; PMCID: PMC9186423.

View in: PubMed Mentions: 1 Fields:
Neu Neurology
Translation:Humans
Theta low-gamma phase amplitude coupling in the human orbitofrontal cortex increases during a conflict-processing task. J Neural Eng. 2022 02 16; 19(1). Chen KH, Tang AM, Gilbert ZD, Martin Del Campo-Vera R, Sebastian R, Gogia AS, Sundaram S, Tabarsi E, Lee Y, Lee R, Nune G, Liu CY, Kellis S, Lee B. PMID: 35086075; PMCID: PMC8900540.

View in: PubMed Mentions: Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Humans
Neuromodulation in Beta-Band Power Between Movement Execution and Inhibition in the Human Hippocampus. Neuromodulation. 2022 Feb; 25(2):232-244. Del Campo-Vera RM, Tang AM, Gogia AS, Chen KH, Sebastian R, Gilbert ZD, Nune G, Liu CY, Kellis S, Lee B. PMID: 35125142; PMCID: PMC8727636.

View in: PubMed Mentions: Fields:
Neu Neurology
Translation:Humans
Exploring Cognition with Brain-Machine Interfaces. Annu Rev Psychol. 2022 01 04; 73:131-158. Andersen RA, Aflalo T, Bashford L, Bjånes D, Kellis S. PMID: 34982594.

View in: PubMed Mentions: 1 Fields:
Psy Psychology
Translation:Humans
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: 3 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Humans Animals
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:
Neu Neurology
Translation:Humans
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; PMCID: PMC8727636.

View in: PubMed Mentions: Fields:
Neu Neurology
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; PMCID: PMC8338769.

View in: PubMed Mentions: 2 Fields:
Neu Neurosurgery
Translation:Humans
Mapping of primary somatosensory cortex of the hand area using a high-density electrocorticography grid for closed-loop brain computer interface. J Neural Eng. 2021 03 04; 18(3). Kramer DR, Lee MB, Barbaro MF, Gogia AS, Peng T, Liu CY, Kellis S, Lee B. PMID: 32131064; PMCID: PMC7483626.

View in: PubMed Mentions: 3 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Humans
SpikeDeep-classifier: a deep-learning based fully automatic offline spike sorting algorithm. J Neural Eng. 2021 02 05; 18(1). Saif-Ur-Rehman M, Ali O, Dyck S, Lienkämper R, Metzler M, Parpaley Y, Wellmer J, Liu C, Lee B, Kellis S, Andersen R, Iossifidis I, Glasmachers T, Klaes C. PMID: 33166944.

View in: PubMed Mentions: 3 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Humans Animals Cells
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; PMCID: PMC8018772.

View in: PubMed Mentions: 4 Fields:
Neu Neurology
Translation:Humans
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; PMCID: PMC7732821.

View in: PubMed Mentions: 7 Translation:Humans Animals Cells
Beta-band modulation in the human hippocampus during a conflict response task. J Neural Eng. 2020 11 11; 17(6). Chen KH, Gogia AS, Tang AM, Del Campo-Vera RM, Sebastian R, Nune G, Wong J, Liu CY, Kellis S, Lee B. PMID: 33059331.

View in: PubMed Mentions: 2 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Humans
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:
Neu Neurosurgery
Translation:Humans
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: Fields:
Bio Biomedical Engineering
Translation:Humans
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.

View in: PubMed Mentions: Fields:
Bio Biomedical Engineering
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; PMCID: PMC8544757.

View in: PubMed Mentions: 2 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Humans
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; PMCID: PMC7225008.

View in: PubMed Mentions: Fields:
Neu Neurosurgery
Translation:Humans
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: 1 Fields:
Bio Biomedical Engineering Neu Neurology
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:
Neu Neurosurgery
Translation:Humans
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; PMCID: PMC7242113.

View in: PubMed Mentions: Fields:
Neu Neurosurgery
Translation:Humans
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; PMCID: PMC6936686.

View in: PubMed Mentions: 12 Fields:
Sci Science
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; PMCID: PMC6692717.

View in: PubMed Mentions: 1
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; PMCID: PMC6717542.

View in: PubMed Mentions: 1 Fields:
Neu Neurology
Translation:Humans
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: 7 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Humans Cells CTClinical Trials
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; PMCID: PMC7271900.

View in: PubMed Mentions: Fields:
Neu Neurology
Translation:Humans Cells
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; PMCID: PMC7307440.

View in: PubMed Mentions: 2 Fields:
Bra Brain
Translation:Humans
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: 2 Fields:
Neu Neurosurgery
Translation:Humans
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; PMCID: PMC7330927.

View in: PubMed Mentions: 4 Fields:
Neu Neurology
Translation:Humans
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; PMCID: PMC5994581.

View in: PubMed Mentions: 20
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; PMCID: PMC5991932.

View in: PubMed Mentions: 1
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; PMCID: PMC5896877.

View in: PubMed Mentions: 54 Fields:
Bio Biology
Translation:Humans
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; PMCID: PMC5707213.

View in: PubMed Mentions:
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; PMCID: PMC5728389.

View in: PubMed Mentions: 13 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Humans
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; PMCID: PMC4820627.

View in: PubMed Mentions: 57 Fields:
Bio Biology Sci Science
Translation:Humans
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; PMCID: PMC4649012.

View in: PubMed Mentions: 23 Fields:
Neu Neurology
Translation:Humans Cells
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: 29 Fields:
Neu Neurology Psy Psychophysiology
Translation:Humans
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; PMCID: PMC4896830.

View in: PubMed Mentions: 159 Fields:
Sci Science
Translation:Humans Cells
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; PMCID: PMC4381869.

View in: PubMed Mentions: 3 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Animals
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; PMCID: PMC4410026.

View in: PubMed Mentions: 32 Fields:
Bio Biology
Translation:Humans
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; PMCID: PMC4410973.

View in: PubMed Mentions: 44 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Animals
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; PMCID: PMC3731390.

View in: PubMed Mentions: 9 Fields:
Bra Brain Neu Neurology
Translation:Humans
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; PMCID: PMC3602219.

View in: PubMed Mentions: 9 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Animals
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; PMCID: PMC3476479.

View in: PubMed Mentions: 8 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Humans
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: 4 Fields:
Bio Biomedical Engineering
Translation:Humans
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: 2 Fields:
Bio Biomedical Engineering
Translation:Animals Cells
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: Fields:
Bio Biomedical Engineering
Translation:Humans
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; PMCID: PMC2970568.

View in: PubMed Mentions: 80 Fields:
Bio Biomedical Engineering Neu Neurology
Translation:Humans
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: 6 Fields:
Bio Biomedical Engineering
Translation:Humans
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; PMCID: PMC2941644.

View in: PubMed Mentions: 21 Fields:
Neu Neurosurgery
Translation:Humans
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: 7 Fields:
Bio Biomedical Engineering
Translation:Animals