Neuropsychology Services

Leaders in treating Dementia, Mild Cognitive Impairment, Neurodegeneretive Disease, Movement Disorders, and Epilepsy


The neuropsychology program at Rocky Mountain Movement Disorders Center (RMMDC) serves a broad range of adult clinical populations. Our clinicians provide assessment services to characterize a person’s cognitive skills (thinking abilities). This may include evaluating memory, attention, language, visuospatial, and problem-solving skills, as well as a patient’s emotional health. The goal of neuropsychological testing is to understand the underlying cause of or contributors to a person’s cognitive difficulties. This can help their medical team determine the best diagnosis and treatment options and help an individual or a family plan for the future.

While we accept referrals for a broad range of conditions, our primary areas of expertise are dementia, mild cognitive impairment, neurodegenerative disease, movement disorders, and epilepsy. We also participate as clinical raters in clinical trials of new investigational therapies for Alzheimer’s disease, Dementia with Lewy bodies, Parkinson’s disease dementia, and other dementias with CenExel RMCR. Finally, we are members of the multidisciplinary team of the Functional Neurosurgery Program at Swedish Medical Center. The neuropsychologists at RMMDC pride themselves on their compassionate approach and tailored, flexible, and efficient assessment style.


Jessica (Mimi) Castelo, PhD, ABPP-CN

Dr. Castelo is a licensed clinical psychologist and board-certified neuropsychologist. She completed her training in the Boston area, with a doctoral degree from Boston University, and residency and two-year post-doctoral fellowship in Neuropsychology at Harvard / Massachusetts General Hospital / Brigham & Women’s Hospital. She then served as Staff Neuropsychologist at Massachusetts General Hospital before relocating to Denver in 2012. She operated a Neuropsychology private practice and then served as Director of Neuropsychology at Blue Sky Neurology until joining RMMDC in the Spring of 2022, with a joint focus on establishing their clinical neuropsychology service and participation in clinical dementia trials with CenExel RMCR. Her spare time is (fully!) consumed by her husband, three daughters, and two dogs, with adventures near and far.

Heather Snead, PsyD

Dr. Snead earned her doctoral degree from the University of Denver and completed her postdoctoral training in neuropsychology at Boston’s Beth Israel Deaconess Medical Center/Harvard Medical School. She has a particular clinical interest in neurodegenerative conditions such as Alzheimer’s disease and Parkinson’s spectrum disorders. Outside of work, she enjoys hiking, mountain biking, and skiing with her family and Belgian Malinois rescue, Luci. Having grown up in Singapore and London, travel is also an important part of her life.

Hannah Crichton

Hannah is a psychometrist experienced in administering a variety of standardized neuropsychological and behavioral assessments to patients with psychological and neurological conditions in both clinical and research settings. Outside of work, she enjoys traveling, baking, and spending time with family.

Jennifer Farren, MMSc, PA-C (Physician Associate)

Jen studied neurology at UC Berkeley during her undergrad years and completed her physician associate training at Yale University. She subsequently joined the team at RMMDC and enjoys working with individuals with all types of movement disorders. Jen feels privileged to contribute to exciting new research targeting therapies to improve the lives of her patients. Outside of the clinic, Jen enjoys reading, trying new recipes, and hiking with her family and dog, Sammie.

Josette Pressler, LPN

Josette has over 45 years’ experience in nursing with 20 years in physical rehabilitation and the past 22 years working in movement disorders with Dr. Rajeev Kumar. Her expertise is with movement disorder exams, rating scales, clinical trials, and patient contact/communication. Josette educates patients, families, and community organizations regarding Parkinson’s disease. She enjoys many Colorado outdoor activities.

Ayla Labbree, BSN, RN

Ayla is a Colorado native and was a medical/surgical nurse for over 4 years, two of which were spent as a travel nurse around the country. Her role at RMMDC as an RN includes administering infusions for various research studies as well as seeing patients in clinic and DBS programming. Outside of work, Ayla enjoys spending time with her husband and family, hiking, traveling, and cooking.

Melissa Overbaugh, Accounting & Business Manager

Melissa has over 26 years of experience in accounting services, payroll services, tax preparation, budgeting, and small business management and administration. She works closely with the Research Department to ensure clinical trial accounting accuracy. Personal interests include almost anything outdoors with an expressive love for hiking and spending time with her four children, family, and friends.

Mona Shriver, Clinic Operations & Billing Manager

A Denver native, Mona is a former elementary school teacher and middle and high school coach who has worked in medical practices in one capacity or another for over 30 years. She acts as the practice manager and billing manager at RMMDC. When not spending time with her husband and 3 daughters, Mona is an avid reader and likes to walk/hike and work with a variety of crafts.