Physicians & Care Team
Meet our care team
Meet the physicians and advanced practice clinicians who support patients across Braincare Performance Center locations.

Nelson S. Jaeggli, M.D.
Board-certified emergency medicine physician
Dr. Jaeggli is a board-certified attending physician in emergency medicine and has been with Braincare Performance Centers since 2022. He completed his emergency medicine residency at Johns Hopkins Hospital and received his medical degree from Columbia University's College of Physicians and Surgeons.
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“I have strong foundations in clinical medicine, medical diagnostics, team leadership and business operations. Over the past 20 years, I have succeeded as an attending physician and medical director. I am dedicated to treating patients with serious traumatic, medical and psychological conditions. In addition, I have been on the boards of two medical diagnostic companies and involved in developing new medical technologies. Brain health is the next frontier of medicine. We are at the early stages of using MeRT and other neuromodulation techniques to significantly improve patients' lives. I am very excited to join the team at Braincare Performance Center.”
Experience
Dr. Jaeggli has practiced medicine in a number of emergency rooms, as well as worked for a Global Neuro-Diagnostics; which is a private fast growing medical diagnostic company providing home video EEG services. He has been with the Braincare Performance Centers since 2022. He is also a Board Certified Attending Physician in the emergency department at Baylor Scott & White Medical Center in Lake Pointe, TX. Additionally, he is a partner at an investment firm focused on diversified and alternative opportunities, called Southwell Capital, LP. From 2016 to 2023, Dr. Jaeggli was at Baylor University Medical Center as an attending physician in the emergency department at the Level 1 Trauma Center, Stroke Center and Regional Referral Hospital for North Texas. He received the Award for Exceptional Wisdom in Medicine in 2022. He was a Clinical Instructor for teaching residents and medical students at Texas A&M Medical School. His diverse background in financial services and medicine makes him a huge asset to the Braincare Performance Team!
Education
- Johns Hopkins Hospital, Department of Emergency Medicine: Emergency Medicine Residency
- Columbia University, College of Physicians and Surgeons: Doctor of Medicine
- Columbia University, School of General Studies: Post-Baccalaureate Pre-Medical Program
- Columbia University, Columbia College: Bachelor of Arts in Comparative Religion

Spencer Miller, M.D.
Board-certified neurologist
Dr. Miller is a board-certified neurologist affiliated with Baylor University Medical Center, where he specializes in stroke, headaches, traumatic brain injury, post-traumatic stress disorder and seizure. He received his medical degree from the University of Mississippi School of Medicine and spent five years in the U.S. Air Force.
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“MeRT is a novel treatment that I personally have watched transform so many lives for the better with little to no down side for most patients. I do not know of any other treatment with such tremendous power to improve the human condition.”
Dr. Spencer Miller is a board-certified Neurologist and is affiliated with Baylor University Medical Center where he specializes in Stroke, Headaches, Traumatic Brain Injury, Post-Traumatic Stress Disorder, and Seizure. Dr. Miller is also associated with the Texas A&M Science Center College of Medicine.
Experience
Dr. Miller received his medical degree from the University of Mississippi School of Medicine and also spent five years in the US Air Force where he had first hand experience with soldiers suffering from Post-Traumatic Stress Disorder and Traumatic Brain Injury.
In 2018, Dr. Miller went to California to learn more about MeRT and experience his own program first hand. After completing his individualized protocol, Dr. Miller noticed that he was able to think more clearly, was no longer depressed, felt less anxiety, and noticed drastic improvements in his sleep quality. Dr. Miller also reported that his family and loved ones started to notice his changes and comment on his demeanor and elevated moods.
Education
- University of Mississippi Medical Center: Neurology Residency
- University of Mississippi School of Medicine: Doctor of Medicine
- Louisiana State University: Bachelor of Science

Eric D. Miller, MS, PMHNP-BC
Board-certified psychiatric mental health nurse practitioner
Eric is a board-certified psychiatric mental health nurse practitioner with more than 40 years of prehospital and critical care experience. A former paramedic, ER and ICU nurse, flight nurse and U.S. Air Force Reserve officer, he focuses on veterans, first responders and high performers.
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“For 40 years, I have worked at the moments that change people's lives: on the street as a paramedic, in the ER and ICU, and in the back of a helicopter. I have seen what trauma and stress do to patients, and what they do to the people who care for them. As a psychiatric nurse practitioner, I believe it is never too late for an accurate diagnosis, and that the right answer can change how a person sees themselves. Brain health is where that change begins. I am excited to join the team at Braincare Performance Center.”
Experience
Eric is a board-certified psychiatric mental health nurse practitioner with more than 40 years of experience in prehospital and critical care. He has served as a paramedic, an ER and ICU nurse at a Level I Trauma Center, and for 20 years as a flight nurse and flight paramedic across 28 states and internationally.
He completed a fellowship in disaster medicine through Beth Israel Deaconess Medical Center and Harvard. During 19 years as a U.S. Air Force Reserve officer, he completed three deployments. His clinical focus includes veterans, first responders and high performers. He is pursuing a Ph.D. in Population Health, researching occupational trauma among first responders and their families.
Eric founded the Rush-Miller Foundation, which has donated tandem bicycles to more than 2,300 blind and low-vision children across 42 states and six countries. His honors include the International Humanitarian Service Award and the Valley Forge Cross for Heroism from the National Guard Association. He is also a two-time Ironman finisher and has completed the Antarctica Marathon.
Education
- Walden University: Ph.D. in Population Health (in progress)
- Beth Israel Deaconess Medical Center and Harvard: Fellowship in Disaster Medicine
- Purdue Global: Master of Science, Psychiatric Mental Health Nurse Practitioner
- University of Phoenix: Master of Arts in Organizational Management
- Colorado State University: Bachelor of Science in Nursing
- Colorado State University: Bachelor of Science in Biology

Melanie Pack, PMHNP
Board-certified family psychiatric mental health nurse practitioner
Melanie is a board-certified family psychiatric mental health nurse practitioner with more than 30 years of nursing service, including 12 years of advanced practice in mental health. She provides holistic psychiatric care across the lifespan and integrates MeRT and TMS into personalized treatment plans.
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“The happiness of your life depends upon the quality of your thoughts.”
Grounded in the wisdom of Marcus Aurelius, Melanie treats the whole person, not just symptoms. Outside of work, she prioritizes family life and incorporates music therapy into her personal and professional wellness philosophy.
Experience
Melanie is a board-certified family psychiatric mental health nurse practitioner with more than 30 years of nursing service across inpatient and outpatient settings, including 12 years of advanced practice in mental health. She provides compassionate, holistic care to people across the lifespan, from age 6 to over 80.
She is experienced in managing anxiety, depression, PTSD, bipolar disorder, schizophrenia, ADHD and dementia. Melanie combines evidence-based psychiatric care, medication management and neurotechnologies, including Magnetic e-Resonance Therapy (MeRT) and Transcranial Magnetic Stimulation (TMS), in personalized treatment plans.
Key focus areas
- Lifespan Care: Comprehensive evaluation and psychiatric management for patients ages 6 to 80+
- Practice Settings: Extensive clinical background spanning both inpatient and outpatient settings
- Advanced Modalities: Integration of evidence-based psychiatric care, medication management, MeRT, and TMS
- Holistic Philosophy: Whole-person approach combining clinical neurotechnology with music therapy principles

Dr. James “Jim” Staudenmeier, Psychiatrist
Colonel, U.S. Army (Ret.)
Dr. Staudenmeier is a retired U.S. Army Colonel and psychiatrist who brings decades of military medical service, clinical experience, and academic leadership to Braincare Performance Center – Clarksville. He provides individualized care to the Fort Campbell and greater Clarksville communities.
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Advanced psychiatric care. A lifetime of service. A commitment to helping patients reclaim their lives.
Experience
Dr. James “Jim” Staudenmeier is a retired U.S. Army Colonel and psychiatrist who brings decades of military medical service, clinical experience, and academic leadership to Braincare Performance Center – Clarksville. His approach to mental health care combines evidence-based treatment, advanced psychiatric expertise, and a deep commitment to helping patients achieve meaningful, lasting improvements in their quality of life.
Dr. Staudenmeier understands that many patients have spent years struggling with depression, anxiety, PTSD, and other mental health challenges. His philosophy emphasizes individualized care, patient collaboration, and a comprehensive understanding of each person’s medical history, personal circumstances, and treatment goals. He is excited about the potential of TMS to help patients improve their mental health and reclaim their quality of life.
Throughout his distinguished military and medical career, Dr. Staudenmeier has served as a featured speaker and presenter at national and international medical and mental health conferences. His presentations have covered a broad range of clinical and professional topics, including addiction treatment, electroconvulsive therapy, hypnotherapy, psychiatric medical coding, clinical research, and healthcare quality improvement.
As a retired Army Colonel, Dr. Staudenmeier brings a unique understanding of the challenges facing active-duty service members, veterans, and military families. His experience with military medicine and behavioral health reinforces his commitment to providing compassionate, individualized care to the Fort Campbell and greater Clarksville communities.
Better is still possible. And it starts here.

Ethan Gore, M.D.
Medical director
Dr. Gore is a board-certified neurologist who joined Braincare Performance Center Pensacola as medical director in 2025. His expertise includes behavioral neurology and neuropsychiatry.
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Experience
Dr. Gore joined Braincare Performance Center Pensacola as medical director in 2025. His expertise in neuropsychiatry supports the center's care for the Pensacola community.
Ethan Gore, MD earned his medical degree from the University of South Alabama in Mobile, AL. He went on to complete an internship in internal medicine and a residency in neurology at the same institution. He then continued his education by completing a fellowship in behavioral neurology at Case Western Reserve University School of Medicine, located in Cleveland, OH. Dr. Gore is board-certified in Neurology and Behavioral Neurology & Neuropsychiatry. He joined the Neuroscience Center at Medical Center Clinic in 2016.
Education
- Medical School: University of South Alabama, Mobile, AL
- Internship: Internal Medicine, University of South Alabama, Mobile, AL
- Residency: Neurology, University of South Alabama, Mobile, AL
- Chief Residency: University of South Alabama, Mobile, AL
- Fellowship: Behavioral Neurology, Case Western Reserve University, Cleveland, OH
- Board Certified: American Board of Psychiatry and Neurology (ABPN), Neurology; Behavioral Neurology & Neuropsychiatry

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