School of Medicine
Showing 121-140 of 336 Results
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Michael Jensen, MD, PhD
Clinical Assistant Professor, Neurosurgery
BioDr. Michael Jensen is a neurosurgeon at Stanford Health Care. He also serves as a clinical assistant professor and director of endoscopic spine surgery in the Department of Neurosurgery, Division of Spine Surgery at Stanford University School of Medicine.
Dr. Jensen specializes in endoscopic and minimally invasive spine surgery for degenerative conditions, herniated discs, spinal stenosis, and spine-related pain, with experience in more than 2,000 procedures throughout his career. As Director of Endoscopic Spine Surgery at Stanford, he focuses on motion-preserving techniques that shorten recovery and restore function. He also employs advanced imaging and meticulous surgical planning to make spinal fusion safer and promote lasting healing. Dr. Jensen’s care philosophy emphasizes precision, collaboration, and open communication—ensuring that every patient understands their options and feels confident in their care.
As a physician-scientist, Dr. Jensen focuses his research on improving the quality, efficiency, and effectiveness of spine care. He has studied how cost-sharing policies, treatment timing, and prescribing patterns affect outcomes for patients with neck and back pain. He has also explored the use of machine learning and predictive modeling to guide clinical decision-making in neurosurgery. Currently, Dr. Jensen works with the Endoscopic Spine Research Group to improve patient pain control and functional recovery after endoscopic spine surgery.
Dr. Jensen has presented his work at national meetings, including those of the Congress of Neurological Surgeons and the Society of Lateral Access Surgery. He has authored numerous peer-reviewed publications in journals such as The Spine Journal, JAMA Network Open, and World Neurosurgery. His research spans clinical care, health economics, and translational science, reflecting his commitment to advancing neurosurgical practice and improving patient outcomes.
Dr. Jensen is a member of the American Association of Neurological Surgeons. -
Siddhartha Joshi, PhD
Senior Research Scientist, Neurosurgery
BioI am a neuroscientist with over 20 years of experience in empirical, hypothesis-driven research. My knowledge and expertise cover a wide range of topics and methods within systems neuroscience including sensory perception, neurophysiology and neuroanatomy, eye-movements and pupillometry. My research is focused on how the brain represents and uses sensory information to drive goal-directed behaviors and in exploring how intrinsic neuromodulatory systems influence the neural circuits that drive such behaviors. At Stanford, I am looking to channel my experience towards studying human neural signals that underlie computations governing pain and attention.
My work thus far [1-4] supports the idea that there is a need for simultaneous measurements of behavior, brain state and large-scale cortical activity to understand how the brain’s circuits: (i) are modulated by ascending sympathetic activation and (ii) provide top-down control of descending sympathetic control. These are technically challenging experiments [3,4] that have thus far largely been explored in animal models. My current goal is to leverage opportunities to directly measure human brain activity via electrodes implanted for monitoring epilepsy. Towards this end, I will use state-of-the-art neurophysiological, behavioral, pupillometric techniques combined with quantitative analyses.
Representative publications:
1. Joshi S, Gold JI (2020) Pupil Size as a Window on Neural Substrates of Cognition. Trends in Cognitive Sciences 24(6), 466-480. PMCID: PMC7271902.
2. Joshi S (2024). Control of Pupil Responses. Encyclopedia of the Human Brain (Elsevier), Second Edition, Vol.1, 374-387.
3. Joshi S, Li, Y, Kalwani R, Gold JI (2016). Relationships between pupil diameter and neuronal activity in the locus coeruleus, colliculi and cingulate cortex. Neuron 89:221-234. PMCID: PMC4707070.
4. Joshi S, Gold JI (2022) Context-Dependent Relationships between Locus Coeruleus Firing Patterns and Coordinated Neural Activity in the Anterior Cingulate Cortex. eLife 11:e63490. PMCID: PMC8765756. -
Neda Kaboodvand
Basic Life Research Scientist, Neurosurgery
Current Role at StanfordResearch Scientist
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Julia Kaltschmidt
Professor of Neurosurgery
Current Research and Scholarly InterestsThe lab’s primary research interest is to understand how specific neuronal circuits are established. We use mouse genetics, combinatorial immunochemical labeling and high-resolution laser scanning microscopy to identify, manipulate, and quantitatively analyze synaptic contacts within the complex neuronal milieu of the spinal cord and the enteric nervous system.
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Vanessa W.Y. Kan
Postdoctoral Scholar, Neurosurgery
BioI am a second-year postdoctoral researcher in Irene Llorente’s laboratory at the Department of Neurosurgery. I completed my Ph.D. at the Graduate School of Systemic Neurosciences GSN-LMU in Munich, Germany, where I was trained as a circuit neuroscientist. During my doctoral work, I focused on dissecting the circuit mechanisms underlying cortical hyperexcitability in ALS, uncovering the pathophysiological role of hyper-responsive layer 2⁄3 neurons (one of the main inputs to layer 5) in the disease course. Currently, my research bridges circuit neuroscience, stem cell biology, and bioinformatics to explore mechanisms of neural repair and regeneration. I utilize advanced experimental and computational tools, including in vivo calcium imaging in awake, freely behaving rodents; machine learning-based motion sequencing (MoSeq); anterograde and retrograde viral tracing techniques; and transplantation of iPSC-derived glial-enriched progenitors and cortical interneurons. In parallel, I apply spatial transcriptomics and single-cell RNA sequencing to map cell-type–specific interactions and molecular signatures during neural circuit remodeling.
My research focuses on understanding the circuit mechanisms underlying neurological conditions such as stroke and identifying how cell-based therapies mediate repair. The ultimate goal of my work is to uncover molecular and cellular processes that promote graft–host integration and functional recovery, paving the way for next-generation regenerative therapies for the injured brain.
In addition to translational research, I am also passionate about scientific education and outreach. I mentor community college students twice a year through the Stanford Science Small Group, in which I share my own experience in research and guide them through the research process. To expand my outreach efforts, in the past summer, I collaborated with Invent Your Own Future as well as The Hong Kong Polytechnic University and organized a summer camp on Neuroscience x AI research for over 20 high school students in Hong Kong. -
Spyros Karadimas, MD, PhD
Assistant Professor of Neurosurgery
BioDr. Spyridon Karadimas is a board-certified, fellowship-trained cerebrovascular neurosurgeon and physician-scientist with Stanford Health Care. He is also an assistant professor in the Department of Neurosurgery at Stanford University School of Medicine.
Dr. Karadimas offers advanced, personalized treatment for complex vascular disorders of the brain, neck, and spine in both adults and children. His expertise spans brain aneurysms, arteriovenous malformations, cavernous malformations, arteriovenous fistulas, Moyamoya disease, stroke, and carotid artery disease. Dr. Karadimas is a rare combination of surgeon, scientist, and innovator dedicated to advancing patient care and shaping the future of cerebrovascular neurosurgery.
Dr. Karadimas directs a basic and translational research program focused on the neural circuits of motor control and stroke recovery. His laboratory integrates systems neuroscience, in vivo imaging, electrophysiology, and brain-computer interface development to uncover the principles of neuroplasticity, or how the brain adapts to change. This knowledge allows him to create new ways to help people move again after a brain injury.
Dr. Karadimas has published his research as first author in peer-reviewed journals such as Nature, Nature Neuroscience and Science Translational Medicine. His work has received editorial highlight at Nature Reviews Neuroscience. He has presented to his peers at international, national, and regional meetings, including those of the American Academy of Neurological Surgery, American Association of Neurological Surgeons (AANS), European Association of Neurosurgical Societies, and World Federation of Skull Base Societies.
Dr. Karadimas is a fellow of the Royal College of Surgeons of Canada and American Association of Neurological Surgeons as well as member of the Congress of Neurological Surgeons, and the North American Skull Base Society. -
Ziya Karimov
Affiliate, Neurosurgery
Visiting Postdoctoral Scholar,BioZiya Karimov, MD is a Neurosurgery Postdoctoral Scholar at Chang/Park Lab in the Department of Neurosurgery, Stanford University School of Medicine. He graduated with an Honours Degree from Ege University Faculty of Medicine (6 years med school, including 1 year Internship) in Izmir, Türkiye. Dr. Karimov ranked top percentile in the Turkish Medical Specialty Exam (TUS) and started the residency at Izmir City Hospital (4th largest hospital in Türkiye). He gained neurosurgery experience in the US top-level centers - Johns Hopkins University, Barrow Neurological Institute, and Lenox Hill Hospital.
Dr. Karimov is interested in Cerebrovascular Surgery, Skull Base Surgery, Neurosurgery Education, and Cognitive and Behavioral Neuroscience.
He plans to be an academic neurosurgeon and teacher, and build up new programs.
Dr. Karimov serves as a Peer-Reviewer in Springer-Nature, Cureus, Lippincott, MDPI, and other trusted publishers.
Hobbies: Judo, swimming, volleyball, intellectual contest games, brain ring -
Laurence Katznelson, MD
Professor of Neurosurgery, Emeritus
Current Research and Scholarly InterestsDr. Katznelson is an internationally known neuroendocrinologist and clinical researcher, with research expertise in the diagnosis and management of hypopituitarism, the effects of hormones on neurocognitive function, and the development of therapeutics for acromegaly and Cushings syndrome, and neuroendocrine tumors. Dr. Katznelson is the medical director of the multidisciplinary Stanford Pituitary Center, a program geared for patient management, clinical research and patient education
