Research Scientist
Dr. Amanda Jacob
(she, her)Email LinkedIn
Ph.D. from University of North Carolina at Chapel Hill
B.S. in Chemistry; Georgia Institute of Technology
B.S. in Physics; Georgia Institute of Technology
Research Interests
Dr. Amanda Jacob has broad research background ranging from cellular to systems neuroscience. Her Ph.D. dissertation work used electron microscopy to understand structural synaptic plasticity, the mechanism used to store and maintain information within individual synapses that is often thought to be the cellular basis of learning and memory. After her graduate studies, she joined Max Planck Florida Institute for Neuroscience as a research scientist where she studied the organization of GABAergic circuitry in the primary visual cortex and managed histological processing of tissue for labs throughout the institute. In addition to her work in the lab, Amanda is a Girl Scout leader, an amateur musician, and is passionate about using art to engage with and to educate the public about scientific topics. Amanda has participated in both the “Hooked” and “Justice” exhibits in the Science Gallery, and has an upcoming exhibit “Resilient Earth.” She has spoken at the Atlanta Science Festival and has organized art and science hybrid events throughout Georgia.
Key Papers
Chung B, Zia M, Thomas KA, Michaels JA, Jacob A, Pack A, Williams MJ, Nagapudi K, Teng LH, Arrambide E, Ouellette L, Oey N, Gibbs R, Anschutz P, Lu J, Wu Y, Kashefi M, Oya T, Kersten R, Mosberger AC, O'Connell S, Wang R, Marques H, Mendes AR, Lenschow C, Kondakath G, Kim JJ, Olson W, Quinn KN, Perkins P, Gatto G, Thanawalla A, Coltman S, Kim T, Smith T, Binder-Markey B, Zaback M, Thompson CK, Giszter S, Person A, Goulding M, Azim E, Thakor N, O'Connor D, Trimmer B, Lima SQ, Carey MR, Pandarinath. ELife 12:RP88551 (2023) [PDF] [DOI]
Commentary
Accessing populations of motor unitsKirk EA, Sauerbrei BA. eLife 2024;13:e94764. (2024) [PDF] [DOI]
Saravanan V, Hoffmann LA, Jacob AL, Berman GJ, Sober SJ. eNeuro Jun 12;6(3) (2019) [PDF]
Research Specialist
Dr. Sumeyra Kilic
(she, her)M.D. from Georgetown American University School of Medicine
Research Interests
Sumeyra Kilic is currently working on birds and their beak movements. She also maintains the laboratory’s bird colony, equipment, and records. Sumeyra loves spending time with her sisters. She also enjoys reading and traveling whenever she has the opportunity.
Postdoctoral Researchers
Dr. Keshav Ramachandra
(he, him)Email LinkedIn
Ph.D. from West Virginia University
Research Interests
Keshav Ramachandra is interested how the nervous system builds model representation of the environment based on processing of external cues and past experience to generate appropriate behavior and how these models are updated when there is a mismatch between expectation and reality to adapt behavior. Prior to joining the lab Keshav did his Ph.D., in the group of Dr. Gary Marsat at West Virginia University working with weakly electric fish where he looked at how the electrosensory system encodes spatially realistic signals.
Dr. César Vargas
(he, him)Postdoctoral Fellow; Emory University
Ph.D. in Neuroscience; The Rockefeller University
B.A. in Neuroscience; Vanderbilt University
Research Interests
César Vargas’ research interest focus on how behaviors are flexibly shaped and controlled by the nervous system. I am particularly interested in pursuing these questions from ethological and evolutionary perspectives. I am also passionate about DEI (Diversity, Equity, Inclusion) efforts to increase access and participation in science from groups historically marginalized in academia. Outside the lab I’m into coffee, finding new restaurants, rock climbing, and taking care of various pets.
Graduate Students
Ethan Corey
(he, him)Email LinkedIn
Ph.D. Student; Biomedical Engineering at Emory and Georgia Tech
Co-Advised: Dr. Lena Ting and Dr. Samuel Sober
Scholar in the Computational Neuroengineering Training Program (CNTP)
B.S. in Biomedical Engineering in Medical imaging and Signal processing; Florida State University
Research Interests
Ethan Corey is a Ph. D. student co-advised by Dr. Samuel Sober and Dr. Lena Ting. Ethan is working to implement Myomatrix arrays in a human population. The goal is to have a better understanding of motor unit recruitment during different tasks or stimulations for potential use in assistive technology. As a CNTP Scholar Ethan works on the Diversity, Outreach, and Inclusion committee and bringing Neuroscience activities and understanding to the broader Atlanta community. Ethan’s personal interests include martial arts, robotics, and prosthetics.
Abi Grassler
(she, her)Email LinkedIn
Ph.D. Candidate; Emory University Neuroscience Program
B.S. in Neuroscience and Behavioral Biology; Emory University
B.A. in Dance and Movement Studies; Emory University
Research Interests
Abi has been a member of the Sober Lab since 2017. Before joining the graduate neuroscience program in 2022, Abi worked alongside graduate student James McGregor to study sensorimotor learning and error correction. Currently, Abi’s research investigates patterns of activity in multifunctional muscles during the execution of functionally distinct behaviors. Abi also explores motor learning and performance outside of the lab: she is a contemporary dancer and a dance teacher.
Key Papers
Will McCallum
(he, him)Email LinkedIn
Ph.D. Student; Emory University Neuroscience Program
Co-Advised: Dr. Francisco J. Alvarez, Emory Cell Biology Dept. and Dr. Samuel Sober, Emory Biology Department
B.S. in Biology; University of Oregon
Research Interests
Will is originally from San Anselmo, California, and received a B.S. in Biology from the University of Oregon, where he worked with Dr. Mike Wehr on circuits auditory perception. Will then studied the neuroanatomy of pain perception and opioid function under Dr. Grégory Scherrer at both Stanford and UNC, Chapel Hill. Will is currently studying how inhibitory interneurons of the spinal cord contribute to motor unit coordination, motor control, and the development of overground walking in mice. Sko Ducks!
Margarita Sison
(she, her)Ph.D. candidate; Emory University Neuroscience Program
Scholar in the Computational Neuroengineering Training Program (CNTP)
M.S. in Neuroscience, Vrije Universiteit Amsterdam and Charité – Universitätsmedizin Berlin
B.S. in Psychology, Ateneo de Manila University
Research Interests
Margarita is a graduate student in the Neuroscience Graduate Program. Currently, her research focuses on identifying the function of different spinal interneuron populations in adaptive motor control during locomotion. Before joining the Sober Lab in 2025, Margarita worked as a research assistant in the group of Dr. Stefan Haufe at Charité-Universitätsmedizin Berlin, where she applied signal processing and brain functional connectivity methods to analyze subdural EEG data from patients with drug-resistant epilepsy.
Kofi Vordzorgbe
(he, him)Email LinkedIn
M.D.- Ph.D. candidate; Emory University School of Medicine
M.S. in Biomedical Sciences; Ichan School of Medicine at Mount Sinai
B.A. in Music Composition; Morehouse College
Research Interests
Kofi’s research interests lie broadly in understanding how neurons work together in a network to control behavior and cognition. He pursues that interest by studying the mechanisms of neural control of motor behavior in songbirds. Songbirds provide a great model for understanding neural control of a skilled behavior because they have a dedicated neural circuitry that is designed and equipped to learn songs from a tutor, refine it based on environmental stimuli, and produce fairly stable renditions of these motifs in various naturalistic contexts. Kofi currently studies the role of HVC, a pre-motor nucleus that plays a role in encoding syllable identity and timing; to answer the question of how internal dynamics of this nucleus controls its output at various points in song where the bird transitions between different sequences.
Matt Williams
(he, him)Email LinkedIn
Ph.D. Candidate; Biomedical Engineering, Emory University and Georgia Tech
B.S. in Biomedical Engineering, Rochester Institute of Technology
B.S. in Mechanical Engineering, Rochester Institute of Technology
Research Interests
Matt Williams’ research is focussed on designing cutting-edge microelectrode arrays (MEA’s) for minimally-invasive detection and analysis of motor-unit action potentials, the smallest unit of neuromuscular control. Matt uses these devices to understand the neural coding underlying skilled movements by implementing them in a skilled forelimb task in awake, (mostly) behaving mice.
Key Papers
Chung B, Zia M, Thomas KA, Michaels JA, Jacob A, Pack A, Williams MJ, Nagapudi K, Teng LH, Arrambide E, Ouellette L, Oey N, Gibbs R, Anschutz P, Lu J, Wu Y, Kashefi M, Oya T, Kersten R, Mosberger AC, O'Connell S, Wang R, Marques H, Mendes AR, Lenschow C, Kondakath G, Kim JJ, Olson W, Quinn KN, Perkins P, Gatto G, Thanawalla A, Coltman S, Kim T, Smith T, Binder-Markey B, Zaback M, Thompson CK, Giszter S, Person A, Goulding M, Azim E, Thakor N, O'Connor D, Trimmer B, Lima SQ, Carey MR, Pandarinath. ELife 12:RP88551 (2023) [PDF] [DOI]
Commentary
Accessing populations of motor unitsKirk EA, Sauerbrei BA. eLife 2024;13:e94764. (2024) [PDF] [DOI]
Undergraduate Students
Letitia Li
pursuing a B.S. in Neuroscience and Behavioral Biology at Emory University
