Leonard P. Rybak, MD, PhD
Division of Otolaryngology - Head and Neck Surgery
Research Interests/Areas of Expertise:
Dr. Leonard P. Rybak, is a professor and ear, nose and throat specialist whose general otolaryngology practice focuses on sinus disease and obstructive sleep apnea. Dr. Rybak received his medical degree from the Medical College of Wisconsin-Milwaukee and completed his internship at Hennepin County Medical Center in Minneapolis. He completed a residency in otolaryngology and also obtained a PhD at the University of Minnesota-Minneapolis.
Dr. Rybak served as an Assistant Professor of Otolaryngology at the University of Minnesota prior to coming to the SIU School of Medicine. Dr. Rybak's professional affiliations include the American College of Surgeons, and the American Academy of Otolaryngology - Head and Neck Surgery. Locally, he is a member of the Sangamon County Medical Society and of various committees at St. John’s Hospital and the SIU School of Medicine. He serves as president of the Sangamon County Chapter of the Society for Neuroscience.
As a clinician and surgeon, Dr. Rybak's special interests include general otolaryngology and sleep apnea. Known both nationally and internationally for his research in the field of otolaryngology, Dr. Rybak has published and presented numerous articles and chapters dealing with various aspects of ear, nose and throat diseases. He is certified by the American Board of Otolaryngology.
For more information or to schedule an appointment with Dr. Rybak, please call 217-545-8000.
Leonard Rybak, MD, PhD is a Professor in the Division of Otolaryngology at SIU School of Medicine and specializes in ear, nose and throat whose general otolaryngology practice focuses on sinus disease and obstructive sleep apnea. He is certified by the American Board of Otolaryngology.
- Investigate the effects of toxic compounds on auditory function, morphology and biochemistry.
- Investigate potential protective agents their and mechanisms against ototoxic compounds.
- Determine the interaction between development and ototoxicity.
- Heavy Metals
- Loop Diuretics
- Aminoglycoside Antibiotics
- Endocochlear Potential (EP)
- Whole Eighth Nerve Compound Action Potential (CAP)
- Auditory Brainstem Response (ABR)
- Intracellular Potentials of the Stria Vascularis (strial potentials)
- Light Microscopy (LM)
- Scanning Electron Microscopy (SEM)
- Transmission Electron Microscopy (TEM)
- Cochlear Adenosine Receptors
- Antioxidant Enzymes
- Cochlear Glucose Metabolism
- High Pressure Liquid Chromatography Pharmacokinetics of Ototoxic Compounds
In collaboration with:
Vickram Ramkumar, PhD, Department of Pharmacology
Full CV download here