People

Primary Investigator


Kareem A. Zaghloul

Kareem A. Zaghloul, MD, PhD

Principal Investigator
kareem.zaghloul@nih.gov

Current Members


John H. Wittig, PhD

John H. Wittig, PhD

Research Fellow
wittigj@mail.nih.gov

John earned his bachelor’s degree in computer engineering and biochemistry and a master’s degree in electrical engineering from the University of California in San Diego. He completed his doctoral work in bioengineering at the University of Pennsylvania, and completed a subsequent postdoctoral fellowship with Dr. Barry Richmond in the Laboratory of Neuropsychology in NIMH. He joined the lab in September 2013.

Julio Chapeton

Julio Chapeton, PhD

Postdoctoral Fellow
julio.chapeton@nih.gov

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.

Vishnu Sreekumar

Vishnu Sreekumar, PhD

Postdoctoral Fellow
vishnu.sreekumar@nih.gov

I completed an integrated MSc in physics from the Indian Institute of Technology, Kanpur and subsequently an MA/PhD in cognitive psychology with a focus on episodic memory from the Ohio State University (Columbus, OH). I joined the lab in January, 2016. In one line of work, I am using dynamical systems methods to characterize the spatiotemporal organization of neuronal activity in the human cortex. In other ongoing work, I seek to understand the neural underpinnings of memory-guided decision-making and memory consolidation. Outside of work, I enjoy playing the piano, chess, biking, and spending time with my wife and daughter.

Zane Xie

Weizhen Xie, PhD

Postdoctoral Fellow
weizhen.xie@nih.gov

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.

Alex Vaz

Alex Vaz

MD/PhD Student, Duke University
vazio92@gmail.com

I was born and raised in Tennessee before studying biomedical engineering at Duke University as an undergraduate. Although the majority of my undergraduate research concerned women's cancers, I developed a strong interest in neuroscience and electrophysiology before graduating. I am currently pursuing an MD/PhD. I enjoy surfing, playing guitar in various bands, and following Chelsea Football Club in my free time.

Rafi Haque

Rafi Haque

MD/PhD Student, Emory University
rafi.haque@nih.gov

After spending my first couple decades in Alabama, I graduated in Biomedical Engineering from the University of Pennsylvania with a focus in computational neuroscience. I'm currently an MD/PhD student at Emory University and am working at NIH for part of my PhD through the GPP program. The main focus of my research is to investigate the electrophysiological mechanisms that underlie novel object recognition using a combination of eyetracking, single unit recordings, and cortical intracranial EEG. Outside of work, I enjoy playing poker, hiking, going to open mic nights, and playing/watching almost all sports.

Mostafa El-Kalliny

Mostafa El-Kalliny

NIH Post-bac IRTA
mostafa.el-kalliny

I grew up in rural Kentucky before earning a degree in neuroscience at UCLA. There, I conducted research on the electrophysiology underling memory processes in the medial temporal lobe. After my time here, I hope to pursue a career that incorporates basic neuroscience and the treatment of psychiatric disorder. Outside of work, I enjoy reading, writing and being outdoors.

Christopher Zawora

Christopher Zawora

NIH Post-bac IRTA
christopher.zawora@nih.gov

Chris grew up in Chicago and graduated from Georgetown University with a B.S. in Computer Science. After graduation, he spent a year working on genomics of fruit-bearing plants at University of Maryland - College Park. Outside of the lab he enjoys learning new vegan recipes and hanging out in Silver Spring.

Erin Schaeffer

Erin Schaeffer

NIH Post-bac IRTA
erin.schaeffer@nih.gov

I grew up in Franklin, Connecticut and graduated from Brown University with a degree in Neuroscience. Before joining the lab, I worked as a research assistant with a focus in deep brain stimulation for Parkinson’s disease. In my free time, I enjoy running, yoga, and hiking.

David Youssef

David Youssef

NIH Post-bac IRTA
david.youssef@nih.gov

Dave grew up in Cleveland, Ohio and graduated from The Ohio State University with a B.S. in Electrical Engineering and a B.S. in Biomedical Engineering. Before joining the lab, he spent a year working as an engineering consultant at a medical device company. Outside of the lab, he enjoys cooking, playing basketball, and running. After his time here, he plans to pursue an MD.

Lab Alumni


Baltazar Zavala

Baltazar Zavala, PhD

MD Student, Johns Hopkins University
zarzavala@gmail.com

Robert Yaffe

Robert Yaffe, PhD

Software Engineer, Google
robertbyaffe@gmail.com

Tora Bonnevie

Tora Bonnevie, MD, PhD

Postdoctoral Fellow, Norwegian University of Science and Technology
tora.bonnevie@ntnu.no

Michael Trotta

Michael Trotta

Software Engineer, Protenus
michaelstrotta@gmail.com

Anthony Jang

Anthony Jang

MD Student, Harvard University
aijang01@gmail.com

Timoth Sheehan

Timothy Sheehan

PhD Student, University of California, San Diego
tim.sheehan@nih.gov

John Cocjin

John Cocjin

PhD Student, Stanford University
jbcocjin@gmail.com

Srikanth Damera

Srikanth Damera

MD/PhD Student, Georgetown University
damera90@gmail.com

Joshua Diamond

Joshua Diamond

MD Student, University of Virginia
jmd2cr@virginia.edu

Jason Hsieh

Jason Hsieh

Neurosurgery Resident, Cleveland Clinic
jason.k.hsieh@gmail.com

Andrew

Andrew Il Yang

Neurosurgery Resident, University of Pennsylvania
il.yang@med.nyu.edu

Jian Dong

Jian Dong

Radiology Resident, Brigham and Women's Hospital
jianwdong@gmail.com