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1. Direct recordings of grid-like neuronal activity in human spatial navigation

Author

Jacobs, Joshua, Weidemann, Christoph T., Miller, Jonathan F., Solway, Alec, Burke, John F., Wei, Xue-Xin, Suthana, Nanthia, Sperling, Michael R., Sharan, Ashwini D., Fried, Itzhak, and Kahana, Michael J.

Subjects
Neuroscience: Behavioral Neuroscience, Neuroscience: Brain Imaging, Psychology: Cognitive Psychology, Neuroscience: Neurophysiology, Psychology: Physiological Psychology, Behavioral Neuroscience, Brain Imaging, Cognitive Psychology, Neurophysiology, Physiological Psychology
Abstract

Grid cells in the entorhinal cortex appear to represent spatial location via a triangular coordinate system. Such cells, which have been identified in rats, bats and monkeys, are believed to support a wide range of spatial behaviors. Recording neuronal activity from neurosurgical patients performing a virtual-navigation task, we identified cells exhibiting grid-like spiking patterns in the human brain, suggesting that humans and simpler animals rely on homologous spatial-coding schemes.

Published
2013

4. Real World Characterization of Chronic Pain, Success Rates and Implant Rates: Evidence from a Digital Health Platform of Patients Undergoing Spinal Cord Stimulation Evaluations

Author

Venkatraman, Vishal, Bharmi, Rupinder, Coletti, Filippo, Gellad, Ziad F., Lempel, Noa, Amit, Roy, Blank, Nicholas, Brown, Jason, Kumar, Charisma, Fishman, Michael, Vallejo, Ricardo, Datta, Devin, Reeve, Bryce B., Chakravarthy, Krishnan, Sharan, Ashwini D., and Lad, Shivanand P.

Published
2023
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6. Ripple oscillations in the left temporal neocortex are associated with impaired verbal episodic memory encoding

Author

Waldman, Zachary J., Camarillo-Rodriguez, Liliana, Chervenova, Inna, Berry, Brent, Shimamoto, Shoichi, Elahian, Bahareh, Kucewicz, Michal, Ganne, Chaitanya, He, Xiao-Song, Davis, Leon A., Stein, Joel, Das, Sandhitsu, Gorniak, Richard, Sharan, Ashwini D., Gross, Robert, Inman, Cory S., Lega, Bradley C., Zaghloul, Kareem, Jobst, Barbara C., Davis, Katheryn A., Wanda, Paul, Khadjevand, Mehraneh, Tracy, Joseph, Rizzuto, Daniel S., Worrell, Gregory, Sperling, Michael, and Weiss, Shennan A.

Subjects
Quantitative Biology - Neurons and Cognition
Abstract

Background: We sought to determine if ripple oscillations (80-120Hz), detected in intracranial EEG (iEEG) recordings of epilepsy patients, correlate with an enhancement or disruption of verbal episodic memory encoding. Methods: We defined ripple and spike events in depth iEEG recordings during list learning in 107 patients with focal epilepsy. We used logistic regression models (LRMs) to investigate the relationship between the occurrence of ripple and spike events during word presentation and the odds of successful word recall following a distractor epoch, and included the seizure onset zone (SOZ) as a covariate in the LRMs. Results: We detected events during 58,312 word presentation trials from 7,630 unique electrode sites. The probability of ripple on spike (RonS) events was increased in the seizure onset zone (SOZ, p<0.04). In the left temporal neocortex RonS events during word presentation corresponded with a decrease in the odds ratio (OR) of successful recall, however this effect only met significance in the SOZ (OR of word recall 0.71, 95% CI: 0.59-0.85, n=158 events, adaptive Hochberg p<0.01). Ripple on oscillation events (RonO) that occurred in the left temporal neocortex non-SOZ also correlated with decreased odds of successful recall (OR 0.52, 95% CI: 0.34-0.80, n=140, adaptive Hochberg , p<0.01). Spikes and RonS that occurred during word presentation in the left middle temporal gyrus during word presentation correlated with the most significant decrease in the odds of successful recall, irrespective of the location of the SOZ (adaptive Hochberg, p<0.01). Conclusion: Ripples and spikes generated in left temporal neocortex are associated with impaired verbal episodic memory encoding.

Published
2018

9. Standardizing postoperative handoffs using the evidence-based IPASS framework through a multidisciplinary initiative improves handoff communication for neurosurgical patients in the neuro-intensive care unit

Author

Schmidt, Richard F., Vibbert, Matthew D., Vernick, Coleen A., Mendelson, Andrew M., Harley, Caitlin, Labella, Giuliana, Houser, Jessica, Becher, Patrick, Simko, Erin, Jabbour, Pascal M., Tjoumakaris, Stavropoula I., Gooch, M. Reid, Sharan, Ashwini D., Farrell, Christopher J., Harrop, James S., Rosenwasser, Robert H., Jaffe, Rebecca C., and Jallo, Jack

Published
2021
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15. Long-term outcomes of mesial temporal laser interstitial thermal therapy for drug-resistant epilepsy and subsequent surgery for seizure recurrence: a multi-centre cohort study.

Author

Youngerman, Brett E., Banu, Matei A., Khan, Farhan, McKhann, Guy M., Schevon, Catherine A., Jagid, Jonathan R., Cajigas, Iahn, Theodotou, Christian B., Ko, Andrew, Buckley, Robert, Ojemann, Jeffrey G., Miller, John W., Laxton, Adrian W., Couture, Daniel E., Popli, Gautam S., Buch, Vivek P., Halpern, Casey H., Le, Scheherazade, Sharan, Ashwini D., and Sperling, Michael R.

Subjects
TEMPORAL lobectomy, EPILEPSY surgery, SEIZURES (Medicine), HIPPOCAMPAL sclerosis, TEMPORAL lobe epilepsy
Published
2023
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20. A Learned Map for Places and Concepts in the Human Medial Temporal Lobe

Author

Herweg, Nora A., Kunz, Lukas, Schonhaut, Daniel, Brandt, Armin, Wanda, Paul A., Sharan, Ashwini D., Sperling, Michael R., Schulze-Bonhage, Andreas, Kahana, Michael J., Herweg, Nora A., Kunz, Lukas, Schonhaut, Daniel, Brandt, Armin, Wanda, Paul A., Sharan, Ashwini D., Sperling, Michael R., Schulze-Bonhage, Andreas, and Kahana, Michael J.

Abstract

Distinct lines of research in both humans and animals point to a specific role of the hippocampus in both spatial and episodic memory function. The discovery of concept cells in the hippocampus and surrounding medial temporal lobe (MTL) regions suggests that the MTL maps physical and semantic spaces with a similar neural architecture. Here, we studied the emergence of such maps using MTL microwire recordings from 20 patients (9 female, 11 male) navigating a virtual environment featuring salient landmarks with established semantic meaning. We present several key findings. The array of local field potentials in the MTL contains sufficient information for above-chance decoding of subjects' instantaneous location in the environment. Closer examination revealed that as subjects gain experience with the environment the field potentials come to represent both the subjects' locations in virtual space and in high-dimensional semantic space. Similarly, we observe a learning effect on temporal sequence coding. Over time, field potentials come to represent future locations, even after controlling for spatial proximity. This predictive coding of future states, more so than the strength of spatial representations per se, is linked to variability in subjects' navigation performance. Our results thus support the conceptualization of the MTL as a memory space, representing both spatial- and nonspatial information to plan future actions and predict their outcomes.

Published
2023

21. List of Contributors of Volume 1

Author

Ackermann, D. Michael, primary, Ajiboye, Abidemi B., additional, Allison, Brendan Z., additional, Barolat, Giancarlo, additional, Bhadra, Narendra, additional, Bhadra, Niloy, additional, Blaha, Charles D., additional, Bouton, Chad E., additional, Bradley, Kerry, additional, Capadona, Jeffrey R., additional, Cogan, Stuart F., additional, Cozzens, Jeffrey W., additional, Cusack, William, additional, D’Haese, Pierre-Francois, additional, Dawant, Benoit M., additional, de Groat, William C., additional, De Ridder, Dirk, additional, Denison, Timothy, additional, Dolce, Jeffery J., additional, Doleys, Daniel M., additional, Donoghue, John P., additional, E. Larsen, Lars, additional, Falowski, Steven M., additional, Foster, Allison, additional, Gauthier, Lynne V., additional, George, Lydia C., additional, Gomez, Christy, additional, Goodman, Amy M., additional, Grill, Warren M., additional, Gross, Robert E., additional, Guan, Yun, additional, Hara, Seth, additional, Harris, James, additional, He, Bin, additional, Herron, Jeffrey A., additional, Hoyen, Harry A., additional, Kaplitt, Michael G., additional, Keith, Michael W., additional, Kent, Alexander R., additional, Kilgore, Kevin L., additional, Kirsch, Robert F., additional, Kocharian, Gary, additional, Konrad, Peter E., additional, Kramer, Jeffery, additional, Krames, Elliot S., additional, Krishna, Vibhor, additional, Lee, Kendall H., additional, Linderoth, Bengt, additional, Ludwig, Kip A., additional, Machado, Andre G., additional, Madineni, Ravichandra, additional, Manker, Steve G., additional, McIntyre, Cameron C., additional, Mogilner, Alon Y., additional, Mortimer, John T., additional, Mosier, Elizabeth M., additional, North, Richard B., additional, Pancrazio, Joseph J., additional, Parker, John L., additional, Peckham, P. Hunter, additional, Pedersen, Nigel P., additional, Peterson, Erik J., additional, Pless, Benjamin, additional, Pulliam, Christopher L., additional, Rezai, Ali R., additional, Richter, Troy A., additional, Riley, Jonathan, additional, Rosenow, Joshua M., additional, Ross, Erika, additional, Sammartino, Francesco, additional, Schalk, Gerwin, additional, Schubauer, Kathryn M., additional, Sharan, Ashwini D., additional, Shellock, Frank G., additional, Shipley, Jane, additional, Shoffstall, Andrew, additional, Simpson, Brian, additional, Slavin, Konstantin V., additional, Stanton-Hicks, Michael, additional, Tai, Changfeng, additional, Taylor, Toacca, additional, Tomasiewicz, Hilarie C., additional, Tyler, Dustin J., additional, Vancamp, Tim, additional, Vanneste, Sven, additional, Vonck, Kristl E.J., additional, W. Clark, Shannon, additional, Weber, Doug, additional, Weiner, Richard L., additional, Wolfson, Michael, additional, Wu, Chengyuan, additional, Ye, Donald Y., additional, Yin, Dali, additional, and Yin, Hang, additional

Published
2018
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23. Spinal Cord Stimulation

Author

Ye, Donald Y., primary, Riley, Jonathan, additional, Madineni, Ravichandra, additional, W. Clark, Shannon, additional, Wu, Chengyuan, additional, Falowski, Steven M., additional, and Sharan, Ashwini D., additional

Published
2018
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26. Increased Surgeon-specific Experience and Volume is Correlated With Improved Clinical Outcomes in Lumbar Fusion Patients

Author

Hines, Kevin, primary, Philipp, Lucas, additional, Thalheimer, Sara, additional, Montenegro, Thiago S., additional, Gonzalez, Glenn A., additional, Hughes, Liam P., additional, Leibold, Adam, additional, Mahtabfar, Aria, additional, Franco, Daniel, additional, Heller, Joshua E., additional, Jallo, Jack, additional, Prasad, Srinivas, additional, Sharan, Ashwini D., additional, and Harrop, James S., additional

Published
2022
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32. Contributors

Author

Abbed, Khalid M., primary, Abdullah, Kalil G., additional, Ackerman, Paul D., additional, Alapan, Yunus, additional, Alentado, Vincent J., additional, Alvin, Matthew D., additional, Ames, Christopher P., additional, Anand, Neel, additional, Anderson, Paul A., additional, Angelov, Lilyana, additional, Anissipour, Alireza K., additional, Anson, John A., additional, Apfelbaum, Ronald I., additional, Archdeacon, Michael, additional, Arnold, Paul M., additional, Arun, Mike W.J., additional, Arzi, Harel, additional, Awad, Ahmed J., additional, Awad, Basem I., additional, Bahuleyan, Biji, additional, Bain, Mark D., additional, Baird, Lissa C., additional, Baisden, Jamie, additional, Baldwin, Nevan G., additional, Ball, Perry A., additional, Balsara, Karl E., additional, Baron, Eli M., additional, Batjer, H. Hunt, additional, Bauer, Andrew M., additional, Bauer, Thomas W., additional, Beckman, Joshua M., additional, Bell, Gordon R., additional, Bellabarba, Carlo, additional, Bennett, E. Emily, additional, Benzel, Edward C., additional, Bergey, Darren L., additional, Bhalla, Tarun, additional, Bierbrauer, Karin S., additional, Bilsky, Mark, additional, Birk, Harjus, additional, Bisson, Erica F., additional, Bono, Christopher, additional, Bransford, Richard J., additional, Brodke, Darrel S., additional, Brooks, Nathaniel, additional, Brotea, Cristian, additional, Brougham, Jared R., additional, Browd, Samuel R., additional, Buckley, Robert T., additional, Burch, Shane, additional, Butler, John, additional, Bydon, Mohamad, additional, Casha, Steven, additional, Ceuppens, Jeroen, additional, Chan, Andrew K., additional, Chen, Thomas C., additional, Cheng, Joseph, additional, Chou, Dean, additional, Choudhri, Tanvir, additional, Clark, Aaron J., additional, Conley, Adam M., additional, Cooper, Paul R., additional, Coric, Domagoj, additional, Corriveau, Mark, additional, Côté, Ian P., additional, Coumans, Jean-Valery C.E., additional, Crawford, Charles H., additional, Curry, William T., additional, Daffner, Scott D., additional, Dalbayrak, Sedat, additional, DeMicco, Russell C., additional, Deutsch, Harel, additional, Dhall, Sanjay S., additional, DiAngelo, Denis J., additional, Dickman, Curtis A., additional, Dodwad, Shah-Nawaz M., additional, Duarte, Siena M., additional, Ebrahim, Zeyd, additional, Eckardt, Gerald W., additional, Ehni, Bruce L., additional, Eichholz, Kurt M., additional, Eichler, Marc, additional, Elbabaa, Samer K., additional, Elder, Benjamin D., additional, Elder, James B., additional, Ellenbogen, Richard G., additional, Epstein, Nancy, additional, Errico, Thomas J., additional, Esquenazi, Yoshua, additional, Fahim, Daniel K., additional, Farag, Ehab, additional, Farley, Chad W., additional, Fehlings, Michael G., additional, Feigenbaum, Frank, additional, Fenton, Eoin, additional, Ferrara, Lisa A., additional, Fessler, R. David, additional, Fessler, Richard G., additional, Finn, Michael A., additional, Finnan, Ryan, additional, Fischgrund, Jeffrey S., additional, Foley, Kevin T., additional, Fontes, Ricardo B.V., additional, Francis, Todd B., additional, Freedman, Brett A., additional, Frost, Frederick, additional, George, John, additional, German, John W., additional, Gerszten, Peter C., additional, Ghobrial, George M., additional, Ghogawala, Zoher, additional, Gibson, Justin L., additional, Gillis, Christopher C., additional, Goel, Vijay K., additional, Goffin, Jan, additional, Gokaslan, Ziya L., additional, Gollogly, Sohrab, additional, Goodwin, C. Rory, additional, Goulart, Carlos R., additional, Goz, Vadim, additional, Gozal, Yair M., additional, Graham, Randall B., additional, Grant, Gerald A., additional, Guan, Jian, additional, Gulec, Ilker, additional, Gussous, Yazeed M., additional, Guyer, Richard D., additional, Gwinn, David, additional, Ha, Sung, additional, Hadar, Eldad, additional, Haldeman, Clayton L., additional, Halim, Alexander Y., additional, Hamilton, Kimberly M., additional, Hammer, Christine L., additional, Hanbali, Fadi, additional, Hann, Shannon W., additional, Harms, Jurgen, additional, Harrop, James S., additional, Hart, Blaine L., additional, Hart, David J., additional, Harwell, Daniel, additional, Hayek, Reyaad A., additional, Heary, Robert F., additional, Henderson, Fraser C., additional, Hitchon, Patrick W., additional, Hoh, Daniel J., additional, Holman, Paul J., additional, Hosono, Noboru, additional, Houseman, Clifford, additional, Houten, John K., additional, Hsieh, Joseph C., additional, Hsu, Wellington K., additional, Huang, Meng, additional, Hurlbert, R. John, additional, Hwang, Lee, additional, Hwang, Steven, additional, İnceoğlu, Serkan, additional, Infinger, Libby Kosnik, additional, de Oliveira, Tatiana von Hertwig Fernandes, additional, Jalan, Devesh, additional, Jha, Neilank, additional, Johnson, J. Patrick, additional, Jones, Charles I., additional, Jones, G. Alexander, additional, Jones, Michael, additional, Juthani, Rupa G., additional, Kager, Christopher D., additional, Kalani, Maziyar A., additional, Kalani, M. Yashar S., additional, Kalfas, Iain H., additional, Kalra, Ricky R., additional, Karimi, Reza J., additional, Kashlan, Osama, additional, Kasliwal, Manish K., additional, Kaul, Vikas, additional, Kaushal, Mayank, additional, Kenning, Tyler J., additional, Khairi, Saad, additional, Khalaf, Tagreed, additional, Khalil, Jad G., additional, Khoo, Larry T., additional, Kiapour, Ali, additional, Kim, Daniel H., additional, Kim, David H., additional, Kimmell, Kristopher T., additional, Kirshblum, Steven, additional, Kitab, Sameer A., additional, Klimo, Paul, additional, Klineberg, Eric O., additional, Koski, Tyler R., additional, Kosztowski, Thomas A., additional, Kowalski, Robert J., additional, Krishnaney, Ajit A., additional, Krupa, Kelly, additional, Krupa, Kristin, additional, Kshettry, Varun R., additional, Kukreja, Sunil, additional, Kuntz, Charles, additional, Kurpad, Shekar N., additional, Kusuma, Srinivasu, additional, LaBagnara, Michael, additional, La Marca, Frank, additional, Laufer, Ilya, additional, Lavelle, Elizabeth Demers, additional, Lavelle, William F., additional, Lawrence, W. Thomas, additional, Lebl, Darren R., additional, Lee, Bryan S., additional, Lee, Sun-Ho, additional, Lenke, Lawrence G., additional, Leon, Steven P., additional, Li, Amy, additional, Li, Yiping, additional, Lieberman, Isador H., additional, Liu, James K.C., additional, Lo, Victor P., additional, Lollis, S. Scott, additional, Lopez-Gonzalez, Miguel, additional, Lubelski, Daniel, additional, Luciano, Mark G., additional, Machado, Andre G., additional, Maddela, Raghu, additional, Madineni, Ravichandra A., additional, Madura, Casey, additional, Maiman, Dennis J., additional, Malone, David G., additional, Mammis, Antonios, additional, Marawar, Satyajit, additional, Marcotte, Nicolas, additional, Maroon, Joseph C., additional, Martin, Michael D., additional, Martinez-del-Campo, Eduardo, additional, Massicotte, Eric M., additional, Mattei, Tobias A., additional, Maurer, Paul K., additional, Mayer, Eric A.K., additional, del Valle, Miguel Mayol, additional, Mazanec, Daniel J., additional, McCormick, Paul C., additional, McCormick, William, additional, Medress, Zachary A., additional, Mendel, Ehud, additional, Metkar, Umesh S., additional, Miele, Vincent J., additional, Mohyeldin, Ahmed, additional, Monsef, Jad Bou, additional, Moore, Timothy A., additional, Morisue, Hikaru, additional, Morone, Peter, additional, Mroz, Thomas E., additional, Mullin, Jeffrey P., additional, Murtagh, F. Reed, additional, Murtagh, Ryan D., additional, Naderi, Sait, additional, Nagaraj, Usha D., additional, Nalley, Charles C., additional, Nanda, Anil, additional, Nasca, Richard J., additional, Nater, Anick, additional, Neal, Matthew T., additional, Nockels, Russ P., additional, Norwig, John A., additional, Ondoma, Solomon M., additional, Oni-Orisan, Akinwunmi, additional, Oren, Jonathan H., additional, Orning, Jennifer, additional, Orr, R. Douglas, additional, Orrico, Katie, additional, Osorio, Joseph A., additional, Otero-Lopez, Ernesto, additional, O'Toole, John, additional, Park, Paul, additional, Parmar, Vikas, additional, Pashman, Robert S., additional, Patel, Rakesh D., additional, Patel, Smruti K., additional, Perez-Cruet, Mick J., additional, Perin, Noel I., additional, Pettigrew, David B., additional, Phillips, H. Westley, additional, Placide, Rick, additional, Porensky, Paul, additional, Prager, Joshua P., additional, Prasad, Srinivas, additional, Prasarn, Mark L., additional, Ramakrishnan, Rakesh, additional, Ramayya, Ashwin G., additional, Rampersaud, Y. Raja, additional, Rasmussen, Peter A., additional, Ratliff, John K., additional, Rauschning, Wolfgang, additional, Rechtine, Glenn R., additional, Recinos, Pablo F., additional, Resnick, Daniel K., additional, Rhee, Jay, additional, Rhines, Laurence D., additional, Riccio, Alexander R., additional, Richardson, Marlin Dustin, additional, Richter, Bertram, additional, Riesenburger, Ron, additional, Riew, K. Daniel, additional, Rogers, Matthew, additional, Saavedra, Fanor M., additional, Safain, Mina G., additional, Saigal, Rajiv, additional, Sawin, Paul D., additional, Scheer, Justin K., additional, Scheidler, Joshua, additional, Schippert, David W., additional, Schlenk, Richard, additional, Schmidt, Bradley, additional, Schmidt, Meic H., additional, Sciubba, Daniel M., additional, Shaffrey, Christopher I., additional, Shaffrey, Mark E., additional, Shah, Anoli, additional, Sharan, Alok, additional, Sharan, Ashwini D., additional, Shedid, Daniel, additional, Shook, Steven, additional, Silverstein, Michael P., additional, Simpson, Venita M., additional, Sin, Anthony, additional, Singh, Harminder, additional, Smith, Donald A., additional, Smith, Gabriel A., additional, Smith, Justin S., additional, Smith, Kyle A., additional, Sonntag, Volker K.H., additional, Soriano-Baron, Hector, additional, Spetzler, Robert F., additional, Spiker, W. Ryan, additional, Staub, Blake, additional, Steinmetz, Michael P., additional, Stillerman, Charles B., additional, Strayer, Andrea, additional, Subramaniam, Gandhivarma, additional, Sukkarieh, Hamdi G., additional, Sumich, Andrew, additional, Sun, Derrick Y., additional, Sunna, Tarek P., additional, Sure, Durga R., additional, Tallarico, Richard A., additional, Tan, Lee A., additional, Tatsui, Claudio E., additional, Techy, Fernando, additional, Theodore, Nicholas, additional, Theologis, Alexander A., additional, Thomas, Nicholas W.M., additional, Thorp, Brian D., additional, Tintle, Scott, additional, Tjoumakaris, Stavropoula, additional, Tobler, William D., additional, Togawa, Daisuke, additional, Traul, David, additional, Traynelis, Vincent C., additional, Tritle, A. Sophia, additional, Trost, Gregory R., additional, Tsai, Eve C., additional, Ugokwe, Kene, additional, Uluc, Kutlauy, additional, Uribe, Juan S., additional, Vaccaro, Alexander R., additional, Valadka, Alex, additional, Vedantam, Aditya, additional, Veeravagu, Anand, additional, Verma, Kushagra, additional, Vitaz, Todd, additional, Voyadzis, Jean-Marc, additional, Wagner, Scott, additional, Wahlquist, Trevor C., additional, Waldrop, Robert, additional, Walsh, Kevin M., additional, Wang, Jeffrey C., additional, Wang, Michael Y., additional, Wang, Patrick T., additional, Ward, John D., additional, Wardak, Zabi, additional, Wathen, Connor, additional, Weinstein, Philip R., additional, Weisman, Michael, additional, Welch, William C., additional, Weller, Simcha J., additional, Westerlund, L. Erik, additional, White, Jonathan A., additional, Whitmore, Robert G., additional, Wilberger, Jack E., additional, Williams, Kim A., additional, Winkler, Ethan A., additional, Witiw, Christopher D., additional, Wolfla, Christopher E., additional, Wolinsky, Jean-Paul, additional, Wong, Cyrus, additional, Woodard, Eric J., additional, Yanamadala, Vijay, additional, Yanni, Daniel S., additional, Yazbak, Philip A., additional, Yen, Chun-Po, additional, Yilmaz, Mesut, additional, Yoganandan, Narayan, additional, Yonemura, Kenneth S., additional, Yonenobu, Kazuo, additional, Yuan, Hansen A., additional, Yue, John K., additional, Zanation, Adam M., additional, Zavarella, Salvatore M., additional, Zeidman, Seth M., additional, Zileli, Mehmet, additional, Zuckerman, Scott, additional, and Zywicke, Holly, additional

Published
2017
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35. Clinical Outcomes at One-year Follow-up for Patients With Surgical Site Infection After Spinal Fusion

Author

Karamian, Brian A., primary, Mao, Jennifer, additional, Toci, Gregory R., additional, Lambrechts, Mark J., additional, Canseco, Jose A., additional, Qureshi, Mahir A., additional, Silveri, Olivia, additional, Minetos, Paul D., additional, Jallo, Jack I., additional, Prasad, Srinivas, additional, Heller, Joshua E., additional, Sharan, Ashwini D., additional, Harrop, James S., additional, Woods, Barrett I., additional, Kaye, Ian David, additional, Hilibrand, Alan, additional, Kepler, Christopher K., additional, Vaccaro, Alexander R., additional, and Schroeder, Gregory D., additional

Published
2022
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40. Interictal epileptiform discharges impair word recall in multiple brain areas

Author

Horak, Peter C., Meisenhelter, Stephen, Song, Yinchen, Testorf, Markus E., Kahana, Michael J., Viles, Weston D., Bujarski, Krzysztof A., Connolly, Andrew C., Robbins, Ashlee A., Sperling, Michael R., Sharan, Ashwini D., Worrell, Gregory A., Miller, Laura R., Gross, Robert E., Davis, Kathryn A., Roberts, David W., Lega, Bradley, Sheth, Sameer A., Zaghloul, Kareem A., Stein, Joel M., Das, Sandhitsu R., Rizzuto, Daniel S., and Jobst, Barbara C.

Published
2017
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42. 343 Machine Learning Using Multiparametric MRI Radiomic Feature Analysis to Predict Ki-67 in Meningiomas

Author

Khanna, Omaditya, primary, Kazerooni, Anahita F., additional, Farrell, Christopher J., additional, Baldassari, Michael, additional, Alexander, Tyler, additional, Karsy, Michael, additional, Garcia, Jose, additional, Sako, Chiharu, additional, Evans, James J., additional, Judy, Kevin D., additional, Andrews, David W., additional, Sharan, Ashwini D., additional, Shi, Wenyin, additional, and Davatzikos, Christos, additional

Published
2022
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49. Machine Learning Using Multiparametric Magnetic Resonance Imaging Radiomic Feature Analysis to Predict Ki-67 in World Health Organization Grade I Meningiomas

Author

Khanna, Omaditya, primary, Fathi Kazerooni, Anahita, additional, Farrell, Christopher J, additional, Baldassari, Michael P, additional, Alexander, Tyler D, additional, Karsy, Michael, additional, Greenberger, Benjamin A, additional, Garcia, Jose A, additional, Sako, Chiharu, additional, Evans, James J, additional, Judy, Kevin D, additional, Andrews, David W, additional, Flanders, Adam E, additional, Sharan, Ashwini D, additional, Dicker, Adam P, additional, Shi, Wenyin, additional, and Davatzikos, Christos, additional

Published
2021
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50. Gray Matter Sampling Differences Between Subdural Electrodes and Stereoelectroencephalography Electrodes

Author

Tantawi, Mohamed, Miao, Jingya, Matias, Caio, Skidmore, Christopher T., Sperling, Michael R., Sharan, Ashwini D., and Wu, Chengyuan

Subjects
stereoelectroencephalography, Neurology, depth electrodes, Neurology (clinical), intracranial electrodes, intracranial monitoring, epileptogenic zone, subdural grid, Original Research
Abstract

Objective: Stereoelectroencephalography (SEEG) has seen a recent increase in popularity in North America; however, concerns regarding the spatial sampling capabilities of SEEG remain. We aimed to quantify and compare the spatial sampling of subdural electrode (SDE) and SEEG implants. Methods: Patients with drug-resistant epilepsy who underwent invasive monitoring were included in this retrospective case-control study. Ten SEEG cases were compared with ten matched SDE cases based on clinical presentation and pre-implantation hypothesis. To quantify gray matter sampling, MR and CT images were coregistered and a 2.5mm radius sphere was superimposed over the center of each electrode contact. The estimated recording volume of gray matter was defined as the cortical voxels within these spherical models. Paired t-tests were performed to compare volumes and locations of SDE and SEEG recording. A Ripley's K-function analysis was performed to quantify differences in spatial distributions. Results: The average recording volume of gray matter by each individual contact was similar between the two modalities. SEEG implants sampled an average of 20% more total gray matter, consisted of an average of 17% more electrode contacts, and had 77% more of their contacts covering gray matter within sulci. Insular coverage was only achieved with SEEG. SEEG implants generally consist of discrete areas of dense local coverage scattered across the brain; while SDE implants cover relatively contiguous areas with lower density recording. Significance: Average recording volumes per electrode contact are similar for SEEG and SDE, but SEEG may allow for greater overall volumes of recording as more electrodes can be routinely implanted. The primary difference lies in the location and distribution of gray matter than can be sampled. The selection between SEEG and SDE implantation depends on sampling needs of the invasive implant.

Published
2021

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