The Headache Institute

The Headache Institute at Texas Neurology is committed to the diagnosis, treatment and management of headaches. Our dedicated team works diligently under the direction of the Medical Director, Dr. Steven. P. Herzog. His support team consists of a Board Certified Nurse Practitioner, Social Services, Registered Nurses and medical and administrative support staff to meet our patients' needs.

Steven P. Herzog, M.D.

Dr. Herzog is a graduate of Arizona State University and received his medical degree from the University of Arizona College of Medicine. He completed his neurological training at the University of Texas Southwestern Medical Center at Dallas and Parkland Hospital where he served as Chief Resident in Neurology from 1988 to 1989.

In 1989, he began private practice at Baylor University Medical Center at Dallas. He served as the Director of Medical Education for the Department of Neurology at Baylor University Medical Center at Dallas from 1989-2009. He is also the Medical Director of the Headache Institute at Texas Neurology which focuses on clinical research and advanced therapies for the treatment of patients with acute and chronic headaches.

Dr. Herzog served as Chairman of the 2001 Texas Neurological Society Winter Conference and the 2004 Summer Conference. He is a frequent lecturer across the state and is quoted by print and television on a regular basis. Dr. Herzog served as president of the Texas Neurological Society for 2004 to 2005.

Chaouki K. Khoury M.D., M.S.

Dr. Khoury is a board-certified, dually-trained Neurologist and Child Neurologist, who practices general neurology with specialization in Headache Medicine. He received his medical degree at the American University of Beirut and completed neurology residency at the University of Oklahoma Health Sciences Center. Dr. Khoury completed his fellowship in Child Neurology at Texas Children’s Hospital/Baylor College of Medicine in Houston, Texas. He is Associate Director of the Comprehensive Headache Institute at Texas Neurology, which focuses on clinical research and advanced therapies for the treatment of patients with acute and chronic headaches.


Gincy Samuel, M.D.

Dr. Samuel earned her medical degree from the University of Texas Medical Branch at Galveston. She completed her neurology residency and clinical neurophysiology fellowship training at the University of Texas Southwestern Medical Center at Dallas. Dr. Samuel is affiliated with Baylor University Medical Center and is a member of the Headache Institute at Texas Neurology which focuses on clinical research and advanced therapies for the treatment of patients with acute and chronic headaches.

Dr. Samuel is involved in clinical research of novel therapies in the treatment of patients with headache. She has presented case studies at the American Academy of Neurology and has published in national peer-reviewed journals. Her involvement with national societies includes the American Academy of Neurology, Texas Neurological Society, International Headache Society, and the American Headache Society.

Dr. Samuel is a patient advocate for those who suffer with acute and chronic forms of various types of headaches. She works closely with her patients to help them in identifying the causes of their headaches and in developing an individualized treatment plan to improve their quality of life.

M. Barrett Horton, FNP-C

Barrett was born and raised in Dallas, TX. He attended Texas Tech University and received a Bachelors in Exercise Sports Science. Barrett then worked as physical therapy technician for 2 years while running boot camps, personal training, and taking pre-requisites for nursing school. He attended nursing school at The University of Texas Medical Branch in Galveston where he received a Bachelors in Nursing. Barrett worked at Parkland Hospital for two years while completing his masters as a Family Nurse Practitioner from Walden University. He loves movies, fishing in East Texas staying active, cooking, his dog Heidi, and spending time with his wife Zoe.

D. Brooke Jones, PA-C

Brooke Jones is a licensed and certified Physician Assistant with a Master of Science degree in Physician Assistant Studies from Texas Tech University Health Sciences Center. She received her Bachelor of Science degree in Medical Technology from the University of Texas Southwestern Medical Center at Dallas in 2001. Brooke has been a Physician Assistant since 2007 and comes to Texas Neurology with previous experience in Neurosurgery and Primary Care.

Ashley L. Olsin, FNP-C

Ashley was born and raised in Dallas, TX. She received her Bachelor's degree in nursing from Texas Woman's University. She has six years of nursing experience, spending most of that time in the Parkland emergency room. Ashley received her Master's degree as a Family Nurse Practitioner from Texas Woman's University. She enjoys traveling, reading, spending time with her husband David and their dog Trudy.


Sheilah Storch, LCSW

Sheilah Storch, LCSW, is a Licensed Clinical Social Worker with a Masters degree in Social Work. She received a Bachelors degree in Psychology and Rhetoric and Communication Studies at the University of Virginia. She received her Masters degree in Social Work at the University of Texas at Austin. Sheilah has had over 20 years of experience in medical social work coordinating care for patients at Baylor University Medical Center and Texas Neurology, P.A.