Skip Navigation
Print This Page
Share this page: More

Speaker Topics: Neurology

Speaker Topics: Neurology


  • Dementia Screening

Dr. Paul Dash, M.D.
Johns Hopkins Community Physicians

Dr. Paul Dash earned his medical degree from the University of California at Irvine. He then completed his residency in neurology at the University of California at San Diego. Dr. Dash was in private practice for many years as a general neurologist in California and New Orleans before joining the staff at Louisiana State University. Dr. Dash relocated to Baltimore as a result of hurricane Katrina and then joined the staff at Johns Hopkins.

Dr. Dash has a special interest in Alzheimer's disease, with a particular focus on screening tests for dementia that can be used in clinical practice. Dr. Dash is also interested in movement disorders and sees many patients with Parkinson’s disease and related disorders. Dr. Dash is board-certified in psychiatry and neurology.


  • Current Therapies in Restless Legs Syndrome
  • Daytime Sleepiness:  Evaluation and Management
  • Narcolepsy:  Diagnosis and Management

Christopher Earley, M.D.
Associate Professor of Neurology
Associate Director, Sleep Disorders Center

Dr. Earley received his Ph.D. and M.B., B.Ch. from the National University of Ireland.  His medical internship was done at Baylor College of Medicine, Houston, TX.  He completed his neurology residency at University of Virginia, Charlottesville, VA.  He is currently ABPN board certified in Neurology as well as in Sleep Medicine and Internal Medicine.

Dr. Earley’s primary interest is in Sleep Disorders, especially Restless Legs Syndrome.  His research is primarily in the area of Restless Legs Syndrome:  the mechanisms that may cause it, possible interventions, and the physical manifestations of the disorder.

Dr. Earley has spoken widely on the diagnosis and treatment of Sleep Disorders in an adult population.

* Please note that Dr. Gamaldo requests an honorarium


  • Women and Sleep
  • Restless Legs Syndrome (RLS)
  • Evaluating and Treating Excessive Daytime Sleepiness
  • Sleep and Aging

Charlene Gamaldo, M.D.
Assistant Professor of Neurology
Instructor, Pulmonary Medicine

Assistant Director, The Johns Hopkins Hospital Sleep Disorders Center

Dr. Charlene Gamaldo received her bachelor’s degree from the University of Virginia in Charlottesville.  She then earned her medical degree from The George Washington University School of Medicine and completed an internship at the Greater Baltimore Medical Center.  After her neurology residency at the University of North Carolina Hospital, Dr. Gamaldo became the first neurology clinical sleep research fellow at Johns Hopkins, where she served as a co-investigator on several studies evaluating the pathophysiology of restless legs syndrome (RLS). In July of 2006, Dr. Gamaldo joined the Johns Hopkins Hospital neurology faculty with a joint appointment in the pulmonary critical care division, serving as the first representative from the neurology department to be on staff in the Johns Hopkins Hospital Sleep Center.

Dr. Gamaldo is now an assistant professor of the Department of Neurology and a clinical instructor in the Department of Pulmonary Medicine. Her research interests are in the area of sleep medicine, specifically investigating the co-morbid health consequences of chronic sleep deprivation.


  • American Board of Psychiatry and Neurology
  • Diplomate, American Board of Sleep Medicine


  • Management and Outcome of Brain Injury After Cardiac Arrest
  • Neurological and Neurosurgical Intensive Care
  • Therapeutic Hypothermia for Acute Brain Injuries
  • Disorders of Intracranial Pressure

Romergryko G. Geocadin, M.D.
Assistant Professor, Neurology/Neurosurgery/Anesthesiology-Critical Care Medicine

Dr. Romergryko Geocadin received his medical degree from the University of the East RMMC College of Medicine in the Philippines. He completed a post-graduate internship at the University of the Philippines-Philippine General Hospital. He then completed both an internship in internal medicine and a residency in neurology at the New York University School of Medicine. He came to The Johns Hopkins as a fellow in neurological critical care.

Now an Assistant Professor of Neurology, Neurosurgery and Anesthesiology-Critical Care Medicine at Johns Hopkins, Dr. Geocadin is a member of the neurological critical care team where he takes care of critical care needs of patients with acute neurologic disorders, peri-operative neurosurgery patients, patients undergoing interventional neuroradiological procedures and other patients who have neurologic complications requiring critical care support.

Dr. Geocadin’s research interests include basic, translational and clinical investigations in acute neurological injuries after global cerebral ischemia such as cardiac arrest; therapeutic hypothermia for acute neurologic injuries; novel application of neuro-electrophysiology for early detection of acute neurological injuries; disorders of intracranial pressure, coma, cerebrovascular disorders and other acute disorders of the nervous system. His research has been funded by the NIH, American Academy of Neurology, and American Heart Association. Dr. Geocadin has been the guest editor for issues of Neurologic Clinics of North American, Critical Care Clinics of North America and Seminars in Neurology.

Dr. Geocadin currently sees patients in the neurosciences critical care units (NCCU) of the Johns Hopkins Bayview Medical Center and Johns Hopkins Hospital.


  • Seizures and Their Management
  • Coma and Delirium
  • Treatment Strategies for Women with Epilepsy

Peter Kaplan, M.D.
Professor of Neurology 

Dr. Kaplan did his medical studies at St. Bartholomew’s Medical School in London, England followed by training in internal medicine in London, Paris and Geneva.  He specialized in Neurology at Duke University Medical Center, followed by a fellowship in Epilepsy and EEG.  He is an internationally acclaimed expert on Epilepsy in Women, EEG and coma.  Dr. Kaplan is the author of 3 books and over 100 research publications and travels extensively giving lectures.



  • Current therapies in acute stroke
  • Formation of primary stroke centers
  • rt-PA administration for acute stroke,
  • Evidence based stroke treatment and headache

Dr. Rafael Llinas, M.D.
Associate Professor of Neurology 

Dr. Llinas received his M.D. from New York University School of Medicine. His medical internship was done at the Boston City Hospital. He completed his neurology residency at the Harvard Longwood Neurology Program. He received his cerebrovascular subspecialty training during a stroke fellowship at the Beth Israel Hospital,Harvard University.  He is currently ABPN board certified in Neurology and Vascular Neurology.

Dr. Llinas' primary interest lies in stroke; especially acute stroke treatments and in neurovascular imaging. His research is primarily involved with diffusion/perfusion imaging and Transcranial Doppler.  Dr. Llinas has a secondary interest in migraine as related to cerebrovascular disease. His practice includes general neurology as well as stroke and migrainous disorders.

Dr. Llinas has spoken widely on: Current therapies in acute stroke, formation of primary stroke centers, stroke in the young, rt-PA administration for acute stroke, evidence based stroke treatment and headache.


  • Approach to Patients with Memory Complaints
  • An Overview of Paraneoplastic Encephalitis
  • Is it Normal Pressure Hydrocephalus or Ex-Vacuo Hydrocephalus?
  • Diagnostic Dilemmas in Idiopathic Intracranial Hypertension

Abhay Moghekar, M.D.
Clinical Instructor, Department of Neurology

Dr. Moghekar is a clinical instructor in the Department of Neurology at the Johns Hopkins University School of Medicine. He earned his medical degree from the University of Bombay in India, and trained in internal medicine at King Edward Memorial Hospital in Bombay, India and Harbor Hospital Center in Baltimore, Maryland.  After completing his neurology residency in Neurology at The Johns Hopkins Hospital, Dr. Moghekar continued at Hopkins for a fellowship in clinical neurology and post-doctoral research fellowship in Neurology.

Dr. Moghekar specializes in dementia of all types, with a special interest in Alzheimer’s disease and vascular dementia.  Much of Dr. Moghekar’s research focuses on how age affects the way nerve cells process beta-amyloid (a substance that is thought to play a role in the development of Alzheimer’s disease).



  • Diabetic neuropathy
  • Peripheral Neuropathy
  • Treatment of neuropathic pain
  • Outcome measures in regenerative peripheral nerve clinical trials.

Michael Polydefkis, M.D.
Associate Professor of Neurology

Dr. Polydefkis is a graduate of Brown University and the Johns Hopkins School of Medicine.  He completed all his postgraduate medical training including internal medicine, neurology and peripheral nerve disease at Hopkins.  He specializes in diabetic neuropathy and has pioneered the use of punch skin biopsy in diabetes and as an outcome measure for regenerative neuropathy clinical trials.

Dr. Polydefkis has received funding from the National Institutes of Health, the Juvenile Diabetes Research Foundation, the Howard Hughes Medical Institute as well as numerous investigator-initiated trials by pharmaceutical companies.

Dr. Polydefkis is available to speak on diabetic neuropathy, peripheral neuropathy, treatment of neuropathic pain and novel outcome measures in regenerative peripheral nerve clinical trials.


  • Migraines and other headaches
  • Headaches secondary to other diseases
  • Headaches in women
  • Headaches: Case-based learning
  • Migraine management
  • Atypical headaches

Jason Rosenberg, M.D.
Associate Professor of Neurology 

Jason D. Rosenberg, M.D. has been named assistant professor of neurology and the director of the new Johns Hopkins Headache Center at Bayview.

A Baltimore native, Dr. Rosenberg graduated with high honors from Harvard University, and received his M.D. from Harvard Medical School. He completed his internship in internal medicine at Mount Auburn Hospital in Cambridge, MA before joining Johns Hopkins as a neurology resident.

After completing his neurology training, he remained at Hopkins as a faculty member, first as Instructor and now as Assistant Professor in the clinician-educator track.

In his new roles, Dr. Rosenberg sees a high volume of patients with a variety of general neurological issues, but focuses his efforts on treating people severe, frequent, or disabling headaches and other related head and facial pain disorders. He regularly attends on the Bayview neurology ward service, is involved in student, resident, and physician education, and has given lectures to the general public as well. In 2006, in order to more effectively serve the needs of his increasingly busy patient practice, he founded the Johns Hopkins Headache Center at Bayview. The goal of the Center will be to provide and seamlessly coordinate multi-disciplinary care for patients suffering from a variety of painful disorders of the head and face, drawing on the tremendous depth and breadth of resources found in the Johns Hopkins Medical Institutions.

Dr. Rosenberg is board certified by the American Board of Psychiatry and Neurology.



  • Dementia
  • HIV-associated neurological manifestations
  • Delirium

Ned Sacktor, M.D.
Associate Professor of Neurology 

Dr. Sacktor received his undergraduate degree at Harvard College.  He received his medical school training at the University of Pennsylvania School of Medicine, and completed his Neurology residency and fellowship training in Dementia at Columbia Presbyterian Hospital in New York.

He has been a faculty member of the Johns Hopkins University School of Medicine Department of Neurology since 1994 and is currently an Associate Professor of Neurology.  His research focuses primarily on the cognitive manifestations of HIV infection.  These investigations include clinical, epidemiological, and neuroimaging studies as well as trials of therapeutic agents for the treatment of HIV-associated dementia.  He is Principal Investigator of several NIH grants and is as acclaimed speaker.


  • Traumatic brain injury - pathophysiology, diagnosis, management
  • Brain edema and intracranial hypertension
  • Neurologic prognostication after acute brain injury
  • Coma and disorders of consciousness
  • Intracerebral hemorrhage
  • Subarachnoid hemorrhage
  • Delirium in the ICU
  • Neuromuscular disorders in the IC

Robert Stevens, M.D.
Associate Professor, Department of Anesthesiology Critical Care Medicine
Associate Professor of Neurology; Neurosurgery; and Radiology-Radiological Sciences

Dr. Stevens received his Federal Diploma of Medicine and his doctorate in Medicine from The Geneva University Faculty of Medicine in Geneva, Switzerland.   After he completed his internship and residency at the Hopitaux Universitaires de Geneve, he completed fellowships in Neurological Critical Care Medicine and Adult Critical Care Medicine at the Johns Hopkins University School of Medicine. 

In addition to his duties at Johns Hopkins, Dr. Stevens also serves as an attending physician at the F.M. Kirby Research Center of the Kennedy Krieger Institute in Baltimore.


Traveling for care?

blue suitcase

Whether crossing the country or the globe, we make it easy to access world-class care at Johns Hopkins.

U.S. 1-410-464-6713 (toll free)
International +1-410-614-6424



© The Johns Hopkins University, The Johns Hopkins Hospital, and Johns Hopkins Health System. All rights reserved.

Privacy Policy and Disclaimer