Complex Spine Surgery Team


Dr. John Abrahams

Dr. Abrahams graduate from Le Moyne College with a degree in Physics and Chemistry. He then completed a Master’s Degree in Biomedical Engineering from Renssalaer Polytechnic Institute before starting medical school at New York Medical College. After medical school, he completed his surgical internship at New York University Medical Center and then completed his residency in neurological surgery from the University of Pennsylvania. During his residency, Dr. Abrahams completed a spine fellowship and a research fellowship at the prestigious Institute for Medicine and Engineering. After residency, he spent two years at Montefiore Medical Center performing complex spine surgery as well as cerebrovascular surgery under the mentoring of Dr. Eugene Flamm.

He joined Brain & Spine Surgeons of New York in 2004 and has grown his practice significantly focusing on complex spine and brain disorders. Dr. Abrahams has founded two biomedical device companies to develop new treatments for specific aspects of both brain and spine surgery. He is the author of numerous patents, has authored over 30 publications in peer-reviewed journals and textbooks, and given lectures at many national and local meetings.

In 2009, he founded the Westchester Neuroscience Research Foundation in an effort to improve awareness to spinal cord and brain injury, malignant brain tumors, and neuromodulation.

In 2015, Dr. Abrahams organized Brain & Spine Surgeons of New York into one of the largest Neurosurgical & Spine practices in the area with a total of 16 surgeons. He was named President of the group in the same year.

Dr. Abrahams professional titles include

  • Associate Professor of Neurological Surgery at New York Medical College
  • Chief of Neurosurgery at Northern Westchester Hospital (Mt. Kisco, NY)
  • Co-director of the Spine Institute at Northern Westchester Hospital in Mt. Kisco, NY)
  • President, Westchester Neuroscience Research Foundation

He performs the majority of his surgical cases at Northern Westchester Hospital. The entire Multidisciplinary Spine team includes

  • Neuroanesthesiologists
  • Neuro-Ortho Spine Operative Nurses
  • Neuromonitoring Physiologists

Intra-Operative care is optimized by

  • Intra-operative CAT Scan (O-Arm) gives accurate placement of instrumentation
  • Intra-operative Fluoroscopy guides us to the appropriate level of surgery
  • Image Guidance allows for optimization of hardware placement
  • Electrodiagnostic Monitoring maintains safety while operative near the nerves

Postoperative Care

  • Neuro-Ortho Spine Nurses for postoperative management
  • In-patient Physical Therapy
  • Placement Services for Acute Rehabilitation Services

The Team


Dr. Ken R. Duffy

Dr. Duffy received his medical degree from Temple University School of Medicine. He completed his internship in General Surgery and residency in Neurological Surgery at the University of California, Los Angeles Medical Center and Affiliates.


  • M.D. Temple University School of Medicine
  • M.S. Physiology, Temple University School of Medicine
  • A.B. Princeton University

Dr. Ezriel E. Kornel

A principal of Brain & Spine Surgeons of New York since 1990, Dr. Kornel is in the forefront of minimally invasive neurosurgery (MIS). MIS is used to minimize the trauma of surgery and increase the speed of recovery. Stemming from his interest in microsurgery, Dr. Kornel has become an expert in minimally invasive endoscopic surgery of the spine as well as minimally invasive approaches in the surgical treatment of brain tumors. Because of his particular interest in cervical spine surgery, he is one of the first neurosurgeons in the New York metropolitan area to replace damaged cervical discs with the newly introduced artificial discs. He was trained in Stockholm in the use of the Gamma Knife and, when indicated, utilizes this stereotactic radiosurgical technique for the treatment of brain tumors as well as for the treatment of trigeminal neuralgia. He is the director of the Institute for Neurosciences at Northern Westchester Hospital in Mount Kisco, NY and is affiliated with many of the leading hospitals in the area.


Dr. Alain C. J. de Lotbinière

Dr. de Lotbinière joined BSSNY as a principal in 2006, after spending 17 years at Yale University School of Medicine (YSM), where he was director of stereotactic and functional neurosurgery, director of pituitary surgery, and medical director of Gamma Knife surgery. He was an associate professor of neurology at YSM, where he created a program for stereotactic and functional neurosurgery as well as radiosurgery.

With a national reputation for properly diagnosing and surgically treating nerve disorders such as trigeminal neuralgia, Dr. de Lotbinière brings peace of mind to patients who have long searched for answers before coming to him. “For example, people often have teeth pulled or are treated for TMJ [temporomandibular joint syndrome] when the cause of their symptoms is actually trigeminal neuralgia, which causes sudden shock-like facial pains, typically near the nose, lips, eyes or ears,” he explains.

At the core of the team is Dr. Abrahams with his Neurosurgical and Orthopedic Colleagues to provide the most comprehensive and safe spinal care to his patients. Dr. Abrahams works both with Neurosurgeons and Orthopedic Surgeons as necessary.

Northern Westchester Hospital has directed patient services making the entire surgical process as seamless as possible. From the moment a patient enters the hospital until they are discharged, NWH provides focused Neuro-Ortho Spine care to its patients optimizing outcomes.

NWH provides patients with single rooms on the Neuro-Ortho Spine floor and patients are attended by Dr. Abrahams or one of his team members on a daily basis until they are discharged.