School of Medicine


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  • Peter Johannes van Roessel

    Peter Johannes van Roessel

    Clinical Associate Professor, Psychiatry and Behavioral Sciences

    BioDr. Peter van Roessel, MD PhD, completed his MD at Stanford University and his residency training in psychiatry at Columbia University and the New York-Presbyterian Hospital in New York City, with additional training in psychodynamic psychotherapy (TFP) via the Columbia University Center for Psychoanalytic Training and Research. Prior to joining the clinical faculty at Stanford, he worked for several years as Associate Director of the general research unit of the New York State Psychiatric Institute, a premier state-funded research hospital affiliated with Columbia University.

    At Stanford, Dr. van Roessel sees adult mood and anxiety disorders outpatients through the Assessment Clinics and participates in resident training and patient care as director of the resident Continuity Clinic and as a supervisor in psychodynamic psychotherapy. He additionally directs the third-year resident curriculum in psychopathology and psychopharmacology. As a member of the department's Rodriguez Translational Therapeutics Lab, he sees individuals with obsessive-compulsive spectrum disorders for evaluations and research-protocol driven clinical treatment and contributes to and leads clinical neuroscience studies pioneering rapid-acting interventions in OCD. Clinically motivated research interests include the nature and neural correlates of metacognitive ‘awareness’ (insight) in OCD and related disorders, and particularly the relationship of awareness to mechanisms of attentional control.

    Dr. van Roessel pursued research training in basic neuroscience prior to his clinical training, completing an MPhil in Biology via the Open University, UK, for research performed at the Max Planck Institute for Developmental Biology in Tübingen Germany, and a PhD in molecular and developmental neurobiology at the University of Cambridge, UK. He has contributed to work in the lab of Dr Julia Kaltschmidt (Stanford) on studies of GABAergic/Glutamatergic interneuronal circuity in mouse. He received a 2018 NARSAD Young Investigator Award to pursue study of nitrous oxide as a rapid-acting treatment for OCD, he was a 2020-2022 Miller Foundation Fellow, and from 2020 to 2022 was a Advanced Fellow in Mental Illness Treatment and Research via the Sierra Pacific Mental Illness Research, Education, and Clinical Center of the Palo Alto VA. Dr. van Roessel is a Fellow of the American Psychiatric Association and a member of the American College of Psychiatrists.

  • Nina Vasan, MD, MBA

    Nina Vasan, MD, MBA

    Clinical Assistant Professor, Psychiatry and Behavioral Sciences

    Current Research and Scholarly InterestsMental illness is the greatest thief of human potential today. By harnessing the power of medicine, entrepreneurship, and technology, we can return that potential to the 2 billion people suffering around the world.

    Brainstorm is the world's first academic laboratory dedicated to transforming mental health through innovation and entrepreneurship.

  • Allison Vreeland

    Allison Vreeland

    Clinical Instructor, Psychiatry and Behavioral Sciences - Child & Adolescent Psychiatry and Child Development
    Postdoctoral Scholar, Psychiatry

    BioDr. Allison Vreeland (she/her) is a licensed clinical psychologist specializing in working with children, teens, and families. Dr. Vreeland received her PhD in Clinical Psychological Science with a minor in Quantitative Studies at Vanderbilt University. She completed her predoctoral clinical internship in Child Psychology at UCSF with specialty training through the Child Trauma Research Program. She completed a research and clinical fellowship in the Immune Behavioral Health Clinic at Stanford University, where she focused her research efforts on examining neurological markers of patients diagnosed with pediatric acute neuropsychiatric syndrome (PANS). Clinically, Dr. Vreeland’s program of clinical care is focused on the delivery of evidence-based clinical interventions for individuals with anxiety, OCD, PANS/PANDAS, mood disorders, and behavioral challenges.

  • Lynn C. Waelde, Ph.D.

    Lynn C. Waelde, Ph.D.

    Adjunct Clinical Professor, Psychiatry and Behavioral Sciences

    BioLynn C. Waelde, Ph.D. is an Adjunct Clinical Professor in the Department of Psychiatry and Behavioral Sciences at Stanford University School of Medicine and Professor Emeritus in the Psychology Department at Palo Alto University. Dr. Waelde’s many collaborative publications address the impacts of traumatic events and ways to use mindfulness and meditation to promote resilience and recovery from stress and trauma. She founded and directed the Inner Resources Center which offered intervention groups and trainings to thousands of participants, clients, and therapists over the past 15 years. Dr. Waelde is the author of Mindfulness and Meditation in Trauma Treatment: The Inner Resources for Stress Program, published in 2022. She has taken a special interest in family caregivers and the Inner Resources for Stress program has been named a Best Practice by the Benjamin Rose Institute on Aging. She recently coauthored Family Caregiver Distress, which is forthcoming in 2023. She is on the editorial board of Journal of Traumatic Stress and an Associate Editor of Mindfulness.