Our Team
Michael Longyear, DC, DACNB, CCSP
Dr. Mike’s passion for helping others comes from personal experience. Having been paralyzed through a traumatic football injury during his sophomore year in high school, he beat the odds and did what the doctors said was impossible.
Feeling defeated hearing that he would never walk again, he used their words as fuel to drive his rehab and he walked out of the hospital a month later. Since that time, he has dedicated himself to helping others defy the odds and never accept their new normal. In his own case, none of his doctors really had a consistent diagnosis. So he started researching his case. His passion led him to Parker University to study chiropractic, where he graduated valedictorian and continued his studies in Applied Clinical NeuroScience. Still searching for answers, he continued to study many disciplines: Chiropractic, Neurology, Psychology and Functional Medicine, just to name a few.
These disciplines have all helped him design his unique brand of health care. Before moving to Jacksonville, Dr. Longyear was the Director of the NeuroLIFE Institute at Life University where he specialized in complex neurological conditions that other health care practitioners had given up on. While there, he was also a part of research with concussion and depression. In addition to clinically treating patients and participating in research he was responsible for designing and teaching programs for doctors around the world in the cutting edge field of Applied Clinical Neuroscience and Functional Neurology.
Meaghan Longyear, DC
Dr. Meaghan Longyear’s journey into healthcare was deeply personal. She struggled with depression and anxiety for much of her early life, carrying what she describes as the sad heart behind the smile. Introduced to the medical field at a young age through her mother, a Registered Nurse, she began working in a hospital as a Nurse Assistant in high school, feeling an undeniable pull toward helping people.
After exploring Nursing, Psychology, and Law Enforcement, she earned a Bachelor’s Degree in Business Administration, yet still felt unfulfilled. Everything shifted when she experienced NeuroEmotional Technique and realized how unresolved trauma can become stored in the nervous system, influencing emotions, behavior, and physical health. That experience redirected her life.
During chiropractic school, her passion expanded as she helped classmates process stored emotional stress while deepening her understanding of brain-body physiology. Dr. Meaghan is certified in NeuroEmotional Technique and Acupuncture, and she integrates both to support nervous system regulation, autonomic balance, and emotional processing at a physiological level. Her background in Medical Intuition, Crystal Healing, and BioGeometric Integration informs a unique clinical style that bridges structure, energy, and emotion.
Her work focuses on identifying subconscious patterns stored within the body, releasing emotional blocks, and restoring clear communication between the brain and the body so patients can experience lasting emotional and physical healing.
Cathy Goldstein, AP
Cathy Goldstein has been a practicing Acupuncture Physician for over 30 years, graduating in 1988 from the New England School of Acupuncture. Cathy is board certified by the national governing board, NCCAOM (National Commission of Acupuncture and Oriental Medicine). Cathy has been deeply involved in the bio-medicine exam development with the NCCAOM where she chaired and was a member for several years. She is also the co-chair of the PEDC (Professional Ethics and Disciplinary Committee) upholding the standards and public safety of acupuncturists nationwide.
Cathy has been trained in NAET and NET since 1993 and has advanced certifications in both NAET and NET. She has been an instructor or facilitator for NAET and NET for over 20 years. She has been excited to bring awareness and natural healing to Jacksonville, FL since 2008.
Kevin Determan, DC
Kevin Determan, DC graduated from the National College of Chiropractic in Chicago and is co-developer of Integrative Health and Allergy Center.
Dr. Determan is Certified Level 3 in NET as well as a Certified NAET practitioner and a NET instructor. His 30+ years of experience allow him to effectively draw parallels between traditional and functional medicine and treat his patients using a broad array of holistic practices.
Dr. Daniel Reyes
Dr. Daniel Reyes is a Florida native whose path into chiropractic began through his own recovery from sports injuries in college. Experiencing firsthand how the body can heal when the nervous system is properly supported inspired him to pursue a career focused on restoring function at its source.
He is trained in Active Release Technique, a specialized soft tissue therapy that improves mobility and reduces pain by addressing dysfunctional movement patterns and tissue restriction. By improving mechanical input to the nervous system, he helps patients move more efficiently and recover more fully.
Dr. Dan is certified in NET, NeuroEmotional Technique and NAET, Nambudripad Allergy Elimination Techniques. These advanced certifications allow him to work with the neurological patterns underlying chronic stress, immune reactivity, and persistent symptoms. By addressing how emotional stress and environmental triggers are processed and stored within the nervous system, he supports regulation, adaptability, and long-term resilience.
His approach is rooted in functional neurology and patient-centered care, focusing on identifying root causes, optimizing brain-body communication, and empowering patients to take an active role in restoring balance and performance.
Deborah Lassiter, Office Manager
Deborah is originally from Pennsylvania but now calls the Sunshine State of Florida home, enjoying every step of her new journey. She holds a B.A. in Science & Biblical Studies with a minor in Communications, blending a strong academic foundation with a passion for meaningful connection.
With over 8 years of management experience in the audiology field, Deborah brings a deep dedication to patient-centered care and a talent for building and strengthening teams so they can thrive in today’s world.
She is thrilled to join the Brain Optimization Institute family, where she loves collaborating with the team and immersing herself in the world of holistic health. Eager to learn from some of the best minds in the field, Deborah is excited to continue growing while supporting patients on their path to healing and wellness.
ashley Pelham, office assistant
Ashley graduated from the University of North Florida in 2021 with a B.S. in Biology with a concentration in Biomedical Sciences, her major being in Medical Sciences with a concentration in Medical Physiology and Pharmacology. She has a passion for holistic health and is planning to obtain another master’s degree or get a doctorate in alternative medicine and neurology in the future!
She has a deep passion to help others and has been working and volunteering in the medical field since she was 15 years old, only recently switching to the alternative medicine route. She is excited to learn and practice holistic health more as she navigates her journey through school and working at BOI.