School of Medicine
Showing 181-200 of 336 Results
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Stephen Lawrence McKenna, MD
Clinical Professor (Affiliated), Neurosurgery
Staff, Neurosurgery OperationsBioDr. Stephen McKenna is a founding member of the Stanford Partnership for Spinal Cord Injury and Repair. He is currently the Chief of the Rehabilitation Trauma Center; as well as, the site director of the Advanced SCI Medicine Fellowship at SCVMC.
As a Neurocritical Care physician, Dr. McKenna specializes in ventilator-dependent Spinal Cord and Traumatic Brain Injury, as well as neuromuscular diseases. He has led first-in-human clinical trials ranging from vaccines for HIV to stem cell-derived oligodendrocyte progenitor cell-based therapies for SCI. Dr. McKenna is Chairman of the Respiratory Section of the International Standards to Document Autonomic Function after SCI (ISAFSCI) and co-chair of the American Spinal Cord Injury Association (ASIA) Research Education Subcommittee.
Clinical Focus:
Spinal Cord Injury
Traumatic Brain Injury
Amyotrophic lateral sclerosis (ALS)
Guillain-Barre syndrome (GBS)
Anti-NMDA receptor encephalitis
Neuromyelitis Optica (Devic disease)
Professional Education:
Board Certification: Neurocritical Care, UCNS (2008)
Board Certification: Internal Medicine, ABIM (2005)
Internship & Residency: Santa Clara Valley Medical Center (2002,2005)
Medical Education: Stanford University School of Medicine (2002)
Book Chapter:
Shah A, Shem K, McKenna SL, Berlly M. Management of Respiratory Failure in Spinal Cord Injury. Spinal Cord Medicine (Hardcover) by Steven, M.D. Kirshblum (Editor) Lippincott Williams & Wilkins; 2011
Selected Publications:
Exploration of surgical blood pressure management & expected motor recovery in individuals with traumatic SCI.
Ehsanian R, et al, McKenna SL.
Spinal Cord. 2020 Mar;58(3):377-386. PMID: 31649323
A Novel Pharyngeal Clearance Maneuver for Initial Tracheostomy Tube Cuff Deflation in High Cervical Tetraplegia.
Ehsanian R, et al, McKenna S.
Am J Phys Med Rehabil. 2019 Sep;98(9):835-838. PMID: 30973517
Burden of Care Implications & Association of Intracranial Hypertension with Extremely Severe Post-traumatic Amnesia After TBI: A 5-Year Retrospective Longitudinal Study.
Quach NT, et al
Front Neurol. 2019 Jan 29;10:34. PMID: 30761071
Venous Thromboembolism is Associated with Lack of Vitamin D Supplementation in Patients with SCI & Low Vitamin D Levels.
Ehsanian R, et al
PM R. 2019 Feb;11(2):125-134. PMID: 30300766
Pulmonary outcomes following specialized respiratory management for acute cervical SCI: a retrospective analysis.
Zakrasek EC, et al, McKenna SL
Spinal Cord, 2017; Feb 21. PMID: 28220822
Dose Response Effect of Exposure to Hypotension on Expected Neurological Recovery in Individuals with Traumatic SCI.
ARCHIVES OF PM&R
Reza, E., et al, McKenna, S.
2016: DOI: http://dx.doi.org/10.1016/j.apmr.2016.09.016
Combined SCI & TBI: recovery of forelimb function after unilateral cervical SCI is retarded by contralateral traumatic brain injury (TBI), & ipsilateral TBI balances the effects of SCI on paw placement.
EXPERIMENTAL NEUROLOGY
Inoue T, et al.
2013 Oct 248: 136-47. PMID: 23770071
Functional electrical stimulation in SCI respiratory care.
TOPICS IN SPINAL CORD REHAB.
R Jarosz, et al, S McKenna
2012:Vol. 18, No. 4, 315-321. PMID: 23459661
Impact of mean arterial blood pressure during the first seven days post SCI.
TOPICS IN SPINAL CORD REHAB.
J Cohn, et al
2010: DOI: http://dx.doi.org/10.1310/sci1503-96
Successful Pregnancy & Delivery in a C1 ASIA A spinal cord injured Woman: The Role of Coordinated Care Between PM&R & Obstetrics Services: A Case Report.
PM&R
Lin C, et al
2010: DOI: http://dx.doi.org/10.1016/j.pmrj.2010.07.461
The impact of project closure on HIV incidence and mortality in a cohort of couples in Lusaka, Zambia.
AIDS CARE
Stephenson R, et al
2008 Jul;20(6):683-91. PMID: 18576170
Rapid HIV testing & counseling for voluntary testing centers in Africa.
AIDS
McKenna SL et al
1997 Sep;11 Suppl 1:S103-10. PMID: 9376093 -
Paul Salomon Mischel
Fortinet Founders Professor and Professor, by courtesy, of Neurosurgery
Current Research and Scholarly InterestsMy research bridges cancer genetics, signal transduction and cellular metabolism as we aim to understand the molecular mechanisms that drive cancer development, progression, and drug resistance. We have made a series of discoveries that have identified a central role for ecDNA (extrachromosomal DNA) in cancer development, progression, accelerated tumor evolution and drug resistance.
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Michelle Monje
Milan Gambhir Professor of Pediatric Neuro-Oncology and Professor, by courtesy, of Neurosurgery, of Pediatrics, of Pathology and of Psychiatry and Behavioral Sciences
Current Research and Scholarly InterestsThe Monje Lab studies the molecular and cellular mechanisms of postnatal neurodevelopment. This includes microenvironmental influences on neural precursor cell fate choice in normal neurodevelopment and in disease states.
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Merna Morcos
Affiliate, Neurosurgery
BioMerna Morcos is a student leader and aspiring physician-scientist with experience in neurosurgery research at Stanford and medical shadowing at UCSF and Stanford Medicine/VA Palo Alto. She founded LeadLaser, an award-winning project that makes lead testing in water more affordable and accessible, and currently serves as Associate Zone Councilor and Chair for Zone 18 of the Society of Physics Students National Council. With leadership roles across multiple clubs, and volunteer work in hospitals and hospice care. She demonstrates a strong blend of research, service, and resilience.
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Seema Nagpal, MD
Clinical Professor, Adult Neurology
Clinical Professor (By courtesy), NeurosurgeryCurrent Research and Scholarly InterestsI'm a board certified neuro-oncologist who treats both primary brain tumors as well as metastatic disease to the brain and nervous system. My research concentrates on clinical trials for patients with late-stage central nervous system cancer. I have a special interest in leptomeningeal disease, a devastating complication of lung and breast cancers. I collaborate with Stanford scientists to detect this disease earlier, and with our breast and lung oncologists to improve outcomes for patients.
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Puja Nakrani
Affiliate,
BioAffiliate, Stanford Neurosurgery
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Jayakar V. Nayak, MD, PhD
Associate Professor of Otolaryngology - Head & Neck Surgery (OHNS) and, by courtesy, of Neurosurgery
On Partial Leave from 09/16/2025 To 04/30/2026Current Research and Scholarly InterestsUpper Airway Stem Cell Biology, Fate, and Repair/Regeneration of the Airway Epithelium to treat Upper and Lower Airway Disorders
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Ryan Nitta
Senior Research Scientist, Neurosurgery
Current Role at StanfordThe main project of the Li lab is to elucidate the signaling pathways responsible for maintaining and initiating brain tumor growth. Previously the Li lab has identified an interesting protein, known as casein kinase 2, which plays an integral role in adult brain tumor growth. My goal is to expand on this initial finding and determine if casein kinase 2 could be a therapeutically relevant drug target in adult brain tumors and whether this protein plays a role in pediatric brain tumors. The role of the candidate would be the lead researcher on these projects, as well as managing and leading the undergraduate and medical students in the lab. In addition, I am responsible for maintaining the laboratory and assisting in grant writing.
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Paul Nuyujukian
Assistant Professor of Bioengineering and of Neurosurgery
Current Research and Scholarly InterestsOur group explores neuroengineering and its application to both basic and clinical neuroscience. Our goal is to develop brain-machine interfaces as a platform technology for a variety of brain-related medical conditions including stroke and epilepsy.
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Thomas Osborne, MD
Adjunct Clinical Professor, Neurosurgery
BioThomas Osborne, MD is board certified in Diagnostic Imaging and Neuroradiology.
He has devoted his professional career to accelerating advancements at the intersection of healthcare, technology, and business. He is driven to solve challenges for broad positive impact and shared success.
Dr. Osborne’s academic publications cover a diversity of topics such as cancer, infectious disease, neurologic disorders, surgery, pain and anxiety, climate health, falls, elder care, determinants of health, telehealth, diagnostics, predictive analytics, drug repurposing, cost savings, employee morale, strategy, efficiencies, health risk, safety, and the integration of advanced technologies into clinical practice.
Dr. Osborne received his medical degree from Dartmouth Medical School and completed his clinical residency and fellowship at Harvard hospitals. He has been an advisor and mentor to other healthcare leaders for most of his career. He is also the Chief Medical Officer at Microsoft, Federal Civilian.
LinkedIn: https://www.linkedin.com/in/tomosbornemd/
Google Scholar: https://scholar.google.com/citations?hl=en&user=2v4Q8DoAAAAJ -
Juan J. Cardona, M.D.
Visiting Instructor, Neurosurgery
BioJuan J. Cardona, M.D. completed his medical school education at Institución Universitaria Visión de las Américas in the “coffee axis” in Pereira, Colombia. During this time, he led the neurosciences research group focusing on neuroanatomy, co-founded a student interest group devoted to promoting early exposure in surgical specialties of interest, completed national and international sub-internships in neurosurgery and neurology, and pioneered clinical electives centered on neurosurgery at the end of his internship. He was instrumental in advancing research practices at his university, where he held the positions of both Director of Scientific Development and Research in Surgical Sciences.
After graduating and being determined to pursue a neurosurgery residency in the United States, he honed his English skills at Florida Atlantic University before undertaking postgraduate medical education. Posteriorly, he delved into the investigative paradigm termed “reverse translational anatomy research” during his Clinical Anatomy Fellowship at the Department of Neurosurgery at Tulane University, where he dedicated two years to advanced training and research on neurosurgical anatomy under the mentorship of Dr. R. Shane Tubbs and Dr. Joe Iwanaga. Throughout his tenure, he actively participated within the department and completed a clinical and surgical observership at East Jefferson General Hospital in New Orleans under the guidance of Dr. Aaron S. Dumont and Dr. Johnny Delashaw. Subsequently, he joined the Clinical Neuro-Oncology Laboratory at the Department of Neurosurgery at Stanford University to study the indications and outcomes of stereotactic radiosurgery as a noninvasive treatment modality under the leadership of Dr. Steven D. Chang and Dr. David J. Park.
His diverse interests span all areas of neurosurgery, particularly in cerebrovascular, endovascular, and skull base surgery, peripheral nerve disease, CNS and PNS tumors, and cutting-edge neurosurgical techniques. Such interests have led to his authorship or co-authorship of over 50 peer-reviewed publications. Moreover, this work has resulted in 23 national and international presentations, where he has received multiple awards. In addition, he has served as an invited reviewer for numerous peer-reviewed articles across five leading journals and was a support reviewer for Chapter 47 in the 43rd edition of Gray’s Anatomy.
