Meet Our Members

Principal Investigator


Photo of Dr. Kareem Zaghloul

Kareem A. Zaghloul, MD, PhD

 Principal Investigator



Current Members


Headshot of Julio Chapeton, Ph.D.

Julio Chapeton, PhD

Postdoctoral Fellow

Julio received bachelor’s degrees in physics and mathematics from the University of South Florida and earned his physics Ph.D. from Northeastern University in Boston. He joined the lab as a postdoc in October 2014 and his current work is focused on analyzing functional and effective connectivity using intracranial EEG and micro-array recordings. The main focus of his research at the NIH is to gain a better understanding of the architecture of human brain networks and the propagation of information through these networks. Other projects involve developing quantitative measures of epileptiform activity which may be useful for seizure detection, prediction, and localization.


Photo of Weizhen Xie, Ph.D.

Weizhen Xie, PhD

Postdoctoral Fellow

I completed my doctoral training in Cognitive Psychology at Universtiy of California, Riverside in 2018. Previously, I received undergraduate training at Renmin University of China (Beijing), Chinese Academy of Sciences (Beijing), and Universtiy of California, Davis. I study human brain and behavior to understand representations and processes of memory and cognition, including questions regarding the quantity and quality of memories, interaction across different states of memory representations, and compromised memory functions in neurological and psychiatric disorders, etc.



Kelsey Sundby, PhD

Postdoctoral Fellow

I received my PhD in Experimental Psychology with an emphasis in cognitive and behavioral neuroscience from the University of California San Diego in 2021. I am interested in understanding how top-down control processes affect memory representations and how memory helps guide behavior. In one line of research, I seek to better understand the role of frontal-basal ganglia networks in memory-guided decisions. Outside of the lab, I enjoy running, hiking, and exploring new restaurants.



Uma Mohan, PhD

Postdoctoral Fellow

Uma received her B.S. in Biomedical Engineering and Applied Math & Statistics from Johns Hopkins University followed by a M.Eng. in Biomedical Engineering from Cornell University. After briefly working as a software engineer, she completed her PhD at Columbia University in Dr. Joshua Jacobs’ Electrophysiology, Memory, and Spatial Navigation Lab. She explored the electrophysiological effects of direct electrical brain stimulation in humans and spatiotemporal patterns of brain oscillations during memory. She joined the lab in 2022 and is investigating in more detail the neural signals related to memory and the effects of brain stimulation on those signals. Outside the lab, she enjoys dancing, running, and traveling.


Ian Bright

Postdoctoral Fellow

Ian grew up outside of Philadelphia, PA and received a B.S. in mathematics and a B.A. in psychology from Indiana University of Pennsylvania in 2016. He joined the lab in 2023 after completing a psychology Ph.D. at Boston University. His research aims to better understand the neural processes that enable episodic memory storage and retrieval, focusing on the role of time and context. Outside of the lab, he enjoys watching movies, hiking, and having the Philadelphia 76ers break his heart.


Ryan Kirkpatrick

Ryan Kirkpatrick

Postdoctoral Fellow

Ryan received his B.S. in Psychology at the University of Nebraska-Lincoln in 2016, and his PhD in Cognitive Psychology at the University of Virginia. He studies the intersection between episodic memory and decision-making, and the neural substrates underlying these processes. Outside of the lab, he enjoys reading, hiking, and traveling around the world. 



Joshua Diamond, MD

Neurosurgery Resident, National Institutes of Health

I graduated from the University of Southern California with a B.S in neuroscience, a long-time and continued passion of mine. In my spare time, I enjoy being with friends and family, playing tennis, and playing and programming chess.



Photo of Samantha Jackson

Samantha Jackson

Data Engineer

Samantha grew up in Silver Spring, MD and graduated from Cornell University with a B.S. in Biological Engineering. After graduation, she spent a year as a post-bac at NIH focused on image processing and deep learning for MRI in acute stroke research. Her current area of work is advancing the intracranial EEG data processing pipeline and codebase. Outside of the lab, she enjoys going to concerts, playing soccer, and traveling



Oceane Fruchet

Lab Manager

Oceane grew up in France and became a licensed Physical Therapist. She then earned her bachelor’s degree in Biomedical Engineering from the Florida Institute of Technology and a master's degree in Computer and Information Technology from the University of Pennsylvania. Before joining the lab in 2022, she spent 2.5 years at Penn studying traumatic brain injury and post-traumatic epilepsy. Outside of work, she enjoys cooking, traveling, and spending time with her husband and her dog.


Photo of Jiali Zhang

Jiali Zhang

PhD Student, NIH Oxford-Cambridge Scholars Program

Originally from China, I grew up in Seattle, Washington and studied Neuroscience at Johns Hopkins. During my undergrad, I explored a wide range of neuroscience research before finding my niche in computational cognitive neuroscience. I am currently pursing my PhD through the NIH-OxCam program and plan to attend medical school thereafter. I love hiking, skiing, and exploring new places, and enjoy cooking up a good meal with friends.



Noah Steinberg

PhD Student, Georgetown University

​​​​I​​​​​​ grew up in New Jersey and attended Lafayette College where I got a BS degree in Neuroscience. After completing a post-bac in the NIMH studying human visual processing, I matriculated to Georgetown’s MD/PhD program in 2019. I am now in the “PhD phase” of my program, where I am co-mentored by Dr. Kareem Zaghloul at NIH and Dr. Maximillian Riesenhuber at Georgetown University and will be investigating semantic memory (ie how the brain understands that ‘d’ + ‘o’ + ‘g’ and fluffy, cuddly animals are the same thing). I'm also a huge soccer fan, love cooking with friends, and going on hikes. 


David Zarrin

David Zarrin

Medical Research Scholars Program

I grew up in California near San Jose. After completing my bachelor’s degree in mechanical engineering at University of California, Berkeley in 2017, I decided to switch to a career in medicine. I completed a pre-medical post-baccalaureate and master’s in biomedical engineering at Johns Hopkins University and am now a rising fourth year medical student at UCLA. I am generally interested in linking engineering with medicine to develop medical devices and technology for neurosurgical patients. In my spare time, you might find me running, backpacking, rock climbing, or spending time with family and friends.


Ujwal Boddeti

Ujwal Boddeti

Medical Research Scholars Program

Hey, I’m Ujwal! I grew up in New Orleans, LA and graduated from the George Washington University in DC with a BS in Chemistry and minors in Biology and Public Health. I am interested in exploring epileptogenesis using computational approaches. Specifically, I hope to use intracranial recordings to explore what happens during seizures, and how this can inform future therapeutic interventions. In my spare time, you can find me reading, playing the piano, or spending time with family and friends.


Valerie Wang

Valerie Wang

NIH Post-bac IRTA

Hi, I’m Valerie! I recently graduated with an M.S. in Applied Physics from Stanford University and a B.A. in Physics from Pomona College. In my overall research journey, I switched from astrophysics into neuroscience, and it has been so fun! I will be doing a Fulbright next year and hope to become a physician-scientist in the future.


Rachael Volkman

Rachael Volkman

NIH Post-bac IRTA

I grew up in Iowa City, Iowa and attended the University of Iowa (Go Hawks) where I received a B.S. in neuroscience. In my time there, I conducted research in the Narayanan lab where I explored the behavioral and cognitive symptoms of neurodegenerative diseases, like Parkinson’s Disease. Outside of lab, I enjoy reading, hiking, painting, and spending time with my cat, Mika.


Maxwell Lichtenfeld

Maxwell Lichtenfeld

NIH Post-bac IRTA

I grew up outside of Atlanta, GA, and I recently graduated from Vanderbilt University with a B.S. in Cognitive Studies, Public Health, and Neuroscience. At Vanderbilt, I worked with intracranial recordings in macaque to investigate the role of distinct layers of cortex, neuronal cell types, and synchronous brain rhythms in generating predictions and integrating those predictions with external stimuli. Now, I am excited to analyze neural networks responsible for memory and prediction in my current research. Outside of the lab, I enjoy going to trivia nights, playing any pickup sport (especially football), and getting out in nature.


Sabrina Nusraty

Sabrina Nusraty

NIH Post-bac IRTA

I grew up in Potomac, Maryland and graduated from the University of Maryland Honors College with a B.S. in Biology and B.A. in Government and Politics. At Maryland, I investigated whether a protein speculated to be involved in seizure development was associated with the mTOR neurodevelopmental pathway. My current research explores the metabolic and inflammatory changes correlated with epilepsy and seeks to identify the signaling capabilities of cilia in the context of glioma tumorigenesis. In my free time, I love to run, hike, and spend time with friends and family!



Lab Alumni


Headshot of John H Wittig Jr Ph.D.

John H Wittig, Jr PhD

VP Data Science, iBoss


Headshot of Vishnu Sreekumar, Ph.D.

Vishnu Sreekumar, PhD

Assistant Professor, IIIT Hyderabad


Photo of Alex Vaz

Alex Vaz, MD, PhD

Neurosurgery Resident, University of Pennsylvania


Photo of Baltazar Zavala, Ph.D.

Baltazar Zavala, MD, PhD

Neurosurgery Resident, Barrow Neurological Institute


Photo of Robert Yaffe, Ph.D.

Robert Yaffe, PhD

Software Engineer, Google


Photo of Tora Bonnevie, M.D., Ph.D.

Tora Bonnevie, MD, PhD

Postdoctoral Fellow, Norwegian University of Science and Technology


Photo of Rafi Haque

Rafi Haque, MD, PhD

Neurology Resident, Massachusetts General Hospital/Brigham & Women's Hospital


Dani McAuliffe

Danielle McAuliffe

Medical Student, Temple University


Photo of Armin Mortazavi

Armin Mortazavi, MD

Neurosurgery Resident, University of Michigan



Mitchell Rock, MD

Neurosurgery Resident, University of North Carolina


Photo of Anas Khan

Anas Khan

MD/PhD Student, University of Alabama - Birmingham


Photo of Marcelle Altshuler

Marcelle Altshuler, MD

Neurosurgery Resident, Brigham and Women's Hospital


Photo of Andrew Il Yang

Andrew Il Yang, MD

Assistant Professor, Barrow Neurological Institute




Photo of Jason Hsieh

Jason Hsieh, MD

Neurosurgery Resident, Cleveland Clinic


Photo of Ai Phuong Tong

Ai Phuong Tong

Medical Student, University of Washington





Molly Baumhauer (she/her)

MD/PhD Student, University of Michigan




Audrey Phan

MD/PhD Student, Harvard University




Ryan Carney

MD/PhD Student, UCLA



Photo of Nichols Faturos

Nichols Faturos

MD/PhD Student, University of Minnesota



Photo of Kohleman Swift

Kohleman Swift

MD/PhD Student, Harvard University




Photo of Srijan Bhasin

Srijan Bhasin

MD Student, Duke University


Photo of Courtney Battles

Courtney Battles

Clinical Specialist, Medtronic Inc.


Photo of Jemima Olu-Owatade

Jemima Olu-Owatade

Research assistant, University of Maryland


Photo of Erin Schaeffer

Erin Schaeffer

MD/PhD Student, University of Wisconsin


Photo of David Youssef

David Youssef

MD Student, Icahn School of Medicine at Mt. Sinai


Photo of Mostafa El-Kalliny

Mostafa El-Kalliny

MD/PhD Student, University of Colorado


Photo of Christopher Zawora

Christopher Zawora

Software Developer, FairVote


Photo of Michael Trotta

Michael Trotta

Software Engineer, Protenus


Photo of Anthony Jang

Anthony Jang, MD

Psychiatry Resident, University of California, Los Angeles


Photo of Timothy Sheehen

Timothy Sheehan, PhD

Data Scientist, Cumulus Neuro 



Photo of John Cocjin

John Cocjin

Data Scientist, C3 AI


Photo of Srikanth Damera

Srikanth Damera, MD, PhD

Pediatrics Resident, Children's National Medical Center


Photo of Jian Dong

Jian Dong, MD

Radiologist, York Hospital, Maine