Meet Our Team

Members of our neuromuscular team include:

  • David M. Simpson, MD. Dr. Simpson is Director of the Clinical Neurophysiology Laboratories and Director of the NeuroAIDS Program at The Mount Sinai Hospital. He completed his fellowship in clinical neurophysiology at Harvard Medical School.

    An author of more than 230 research publications and book chapters, Dr. Simpson has been the principal investigator for many studies, including studies on the treatment of spasticity with botulinum toxin, management of pain in patients with peripheral neuropathy, and the diagnosis and treatment of patients with neurological complications of HIV/AIDS.

    Dr. Simpson sits on the editorial board of AIDS Patient Care and Current HIV/AIDS Reports. He is frequently listed among the New York Times Super Doctors and New York Magazine’s Best Doctors in New York. He lectures extensively internationally in his fields of expertise.

  • Lan Zhou, MD, PhD. Dr. Lan Zhou is an associate professor in the Department of Neurology at Mount Sinai. She is board certified in Neurology, Neuromuscular Medicine, and Neuromuscular Pathology. She predominantly treats adult patients with neuromuscular disorders with a special interest in myopathies and small fiber neuropathy. She also performs skin/nerve/muscle biopsies and interprets biopsies.

    Dr. Zhou is a physician scientist. Her research team is actively exploring the molecular mechanisms underlying muscle inflammation and fibrosis associated with muscular dystrophy and acute skeletal muscle injury repair. Her research is aimed to develop novel pharmacotherapy to modify inflammation, reduce fibrosis, promote regeneration, and improve muscle function and phenotype in patients with muscular dystrophy. Her research is funded by the National Institute of Health.

  • Mark A. Sivak, MD. Dr. Sivak has been involved in the diagnosis and care of patients with myasthenia gravis (MG) for several decades. His research includes the evaluation of the associates of thyroid antibodies in MG patients, as well as the incidence of lupus in patients with MG. He participated in an evaluation of the effect of mycophenolate mofetil in patients with MG, and is a current participant in an international study of the effect of thymectomy in patients with MG. He is currently participating in a study evaluating the efficacy of eculizumab in MG patients.

    Dr. Sivak has run the ALS (amyotrophic lateral sclerosis) program at Mount Sinai for 15 years and has treated hundreds of patients with this disease. He has participated in studies of ALS patients involving the drugs CNTF and BDNF.

  • Jessica Robinson-Papp, MD. Dr. Robinson-Papp is a neurologist with special interest in neuropathy and the neurologic complications of HIV/AIDS. She is the recipient of a grant from the National Institute of Neurologic Disorders and Stroke to study HIV-associated neuropathy (K23 NS066789).

    In addition to research, Dr. Robinson-Papp performs electromyography (EMG), autonomic testing, and evoked potentials to aid in the diagnosis of peripheral nervous system disorders. She also provides neurologic consultations at the Jack Martin Fund AIDS Clinic. Dr. Robinson-Papp is a lecturer for the Mount Sinai Institute for NeuroAIDS disparities and the AIDS Education and Training Center.

  • Rajeev Motiwala, MD, is a general neurologist with an additional interest in peripheral neuromuscular disorders. He sees patients in neurologic consultation at 5 East 98th Street. He has experience in performing electromyography for over 20 years. He is board-certified in Neurology and Electrodiagnostic Medicine (EMG).

  • Fatmir Sejdiu, R.NCS.T. Mr. Sejdiu is a certified clinical neurophysiology technologist. He is trained in nerve conduction studies, autonomic function tests, quantitative sensory testing, evoked potentials, and electroencephalography. He also has experience assisting physicians with botulinum toxin injections for neurologic disorders.

    Mr. Sejdiu worked in electrodiagnostic labs at several major academic centers before coming to Mount Sinai, including Massachusetts General Hospital, associated with Harvard Medical School, and NewYork-Presbyterian Hospital/Weill Cornell Medical Center. He was integrally involved in the training of fellows in neurophysiology and participated in research projects at these institutions.