


The IRIS NeuroStudy aims to assess the long-term neuropsychiatric and neuropsychological dysfunctions associated with COVID-19 from an interdisciplinary perspective.
The proposed human subjects study leverages interdisciplinary expertise across the medical school to address the urgent need to understand the mechanisms by which the SARS-CoV-2 infection may impact long-term neuropsychiatric and neuropsychological functions. There are increasing reports of post-infection ‘brain fog’ characterized by poor concentration, anxiety, and sleep disruptions, even when physical COVID symptoms were mild.
Our IRIS study represents a landmark study in addressing these possibilities in depth. The knowledge generated will have the potential to help elucidate the root cause of ‘brain fog’ post-infection, yield new brain-based tools for diagnosing COVID-19-related neuropsychiatric sequelae, and identify selective mechanistic targets for novel interventions that will ultimately help ameliorate these effects.
Our Goals
Our goal is to develop, using neuroimaging, neuropsychological, and immunological assays, biobehavioral signatures to assist with the prediction and diagnosis of COVID-19 psychiatric outcomes as well as the tailoring of treatment. To the best of our knowledge, this would be the first systematic study of the long-term neurologic and neuropsychiatric impact of COVID-19. Our brain imaging biotypes represent an innovation that we leverage in the new study of the impact of COVID-19. These biotypes have been shown to provide biomarkers for assessing the impact of pharmacotherapeutic interventions in neuropsychiatric disorders, as well as the impact on mechanistic targets engaged by these interventions. Thus, in coordination with the PIs from the IRIS cohort providing immunological and physical diagnostic data, our previous findings will provide the foundation for exploring important tools to assess behavioral and neurologic dysfunction related to COVID-19 and, in future studies, target this dysfunction with selective treatments.​
We seek to address the following four specific aims:
Aim 1: Characterize the severity and progression of psychiatric symptoms in patients from the IRIS cohort at 3, 6, and 12 months post-COVID19 diagnosis compared to healthy reference norms.
Aim 2: Characterize the severity and progression of impairments in neurocognitive functions, focusing on those that are characteristic of ‘brain fog’ relative to those that are not.
Aim 3: Identify profiles of neural circuit dysfunction (“biotypes”) that underlie the neurocognitive and neuropsychological impairments falling within the classification of “brain fog.”
Aim 4: Elucidate the extent to which the symptom-neuropsychological-biotype profiles elucidated under Aims 1, 2, and 3 are associated with immunophenotyping profiles generated by our ID collaborators.
Our Methods
We use a variety of methods to help us address the multi-faceted SARS-CoV-2 symptoms of interest:
NeuroStudy Arm:
Neuropsychiatric Symptom Assessments

Clinical diagnostic interview & surveys to understand each person’s life experience and assess the severity of depression, anxiety and other mood disorders
1
Neurocognitive Assessments

Behavioral measurements aimed at quantifying memory, executive functioning and problem solving
2
Neural Circuit Assessments

Brain scans to map with precision the connections among brain circuits and their relative dysfunction using the classification of imaging biotypes
3
Infectious Disease Arm:
Immunological Assessments

Neuroinflammatory biomarkers and other physical diagnostic information to be used in association with imaging biotypes
1
INFECTION RECOVERY IN SARS-COV-2 INFECTION NEUROSTUDY (IRIS NEUROSTUDY)
Meet the Team

Leanne Williams, PhD

Laura Hack, MD, PhD

Philip Grant, PhD

Megan Chesnut

Claire Bertrand

Max Wintermark, MD

Aruna Subramanian, MD

Hector Bonilla, PhD

Jacob Brawer

Emily Zhai
Clinical and Neurocognitive Aspects of Long Haul COVID
Stanford Department of Medicine Grand Rounds – 2021
Speakers:
- Dr. Aruna Subramanian, MD, Clinical Professor, Chief - Immunocompromised Host Infectious Diseases
- Dr. Leanne Williams, Ph.D., Professor and Associate Chair for Translational Neuroscience, Psychiatry, and Behavioral Sciences
Findings
This study is currently collecting data.
Funding
Funding for our IRIS NeuroStudy is provided by Stanford ChEM-H/IMA.