Our Doctors

Dr. Stephen Schmitz

Clinical Neuropsychologist, Director | Clinical and Scientific Advisor, DriveABLE

Dr. Stephen Schmitz is a Clinical Neuropsychologist and the founder and Clinical Director of The Brain and Behavior Clinic.  He received his Ph.D. in Clinical Psychology in 1985 and was then awarded a 2 year post doctoral fellowship position in Clinical Neuropsychology at the University of Colorado Health Sciences Center, studying under the direction of Dr. Robert Heaton.


Dr. Ilene Naomi Rusk

Neurobehavioral Consultant | Psychotherapy | Cognitive Rehabilitation

Dr. Ilene Rusk is a co-owner of The Brain and Behavior Clinic and spearheads our Healthy Brain and Rehabilitation and Treatment programs.  She holds a prestigious M.Sc.Q, Ph.D. from the University of Birmingham in England in Neuropsychopharmocology and has authored over 20 scientific research papers in areas as diverse as cerebral palsy, Parkinson's disease, Alzheimer's disease, and the effects of dopamine and norepinephrine neurotransmitters on behavior.  She has previously completed 3 postdoctoral Fellowship positions in Conductive Education, Neural Tissue Transplantation, and the development of novel treatment strategies for Parkinson's disease.  Dr. Rusk is a regular lecturer on the subject of the neuropsychological aspects of death and dying and leads an Embracing Life group at a local senior living facility.   She is a cofounder of the Death Café in Boulder County and currently serves as the Vice-Chairwoman on the Board of Directors of The Grillo Health Information Center.


Dr. Mark Zacharewicz

Dr. Mark Zacharewicz joined The Brain and Behavior Clinic in 1997 after working for three years in a general Neuropsychology practice in Fort Smith, Arkansas.  Prior to that position he had completed a two year post-doctoral fellowship appointment in Clinical Neuropsychology at the University of Wisconsin-Madison, working under the direction of Dr. Charles Matthews, an internationally distinguished academician and neuropsychologist.  Dr. Zacharewicz helped initiate the pioneering Memory Disorders Clinic at the University of Wisconsin-Madison and he developed a number of Dementia Clinics and a clinic for Attention Deficit Disorders while in Arkansas.  Dr. Zacharewicz possesses a vast knowledge of the scientific foundations of neuropsychological assessment and diagnosis and is particularly skilled in providing expert testimony in forensic matters.  He has a great deal of experience evaluating the neuropsychological aspects of a variety of general medical and psychiatric conditions and in conducting competency evaluations.  Dr. Zacharewicz is a member of the International Neuropsychological Society, the National Academy of Neuropsychology, and is a past-president of the Colorado Neuropsychological Society.


    Dr. Catherine Frantom

    Dr. Catherine Frantom joined the Brain and Behavior Clinic in 2104. She earned her doctorate in psychology with a second concentration in statistics. She attended the University of Denver for her PhD, completed an APA accredited clinical internship, followed by an NIH funded T-32 fellowship at the University of Missouri in Columbia. She holds Diplomate status in Neuropsychology, Board certified by the American Board of Professional Psychology. She has been practicing for over 15 years and has broad experience working with neurological disorders and traumatic brain injury.

      Our Staff

      Heather Baldassar

      Heather Baldassar is our Chief Psychometrist and heads our Neuropsychological Testing Department.  She is committed to helping patients and clients maximize their testing experience so that a true and accurate measurement of the optimal performance of their brain functioning is achieved.


        Cynthia Henninger

        For the past 16 years Cynthia Henninger has served as the Brain and Behavior Clinic's Office Manager.

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