School of Medicine
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Siddhartha Joshi, PhD
Senior Research Scientist, Neurosurgery
BioI am a neuroscientist with over 20 years of experience in empirical, hypothesis-driven research. My knowledge and expertise cover a wide range of topics and methods within systems neuroscience including sensory perception, neurophysiology and neuroanatomy, eye-movements and pupillometry. My research is focused on how the brain represents and uses sensory information to drive goal-directed behaviors and in exploring how intrinsic neuromodulatory systems influence the neural circuits that drive such behaviors. At Stanford, I am looking to channel my experience towards studying human neural signals that underlie computations governing pain and attention.
My work thus far [1-4] supports the idea that there is a need for simultaneous measurements of behavior, brain state and large-scale cortical activity to understand how the brain’s circuits: (i) are modulated by ascending sympathetic activation and (ii) provide top-down control of descending sympathetic control. These are technically challenging experiments [3,4] that have thus far largely been explored in animal models. My current goal is to leverage opportunities to directly measure human brain activity via electrodes implanted for monitoring epilepsy. Towards this end, I will use state-of-the-art neurophysiological, behavioral, pupillometric techniques combined with quantitative analyses.
Representative publications:
1. Joshi S, Gold JI (2020) Pupil Size as a Window on Neural Substrates of Cognition. Trends in Cognitive Sciences 24(6), 466-480. PMCID: PMC7271902.
2. Joshi S (2024). Control of Pupil Responses. Encyclopedia of the Human Brain (Elsevier), Second Edition, Vol.1, 374-387.
3. Joshi S, Li, Y, Kalwani R, Gold JI (2016). Relationships between pupil diameter and neuronal activity in the locus coeruleus, colliculi and cingulate cortex. Neuron 89:221-234. PMCID: PMC4707070.
4. Joshi S, Gold JI (2022) Context-Dependent Relationships between Locus Coeruleus Firing Patterns and Coordinated Neural Activity in the Anterior Cingulate Cortex. eLife 11:e63490. PMCID: PMC8765756. -
Anjali Jotwani, MD, MS
Clinical Assistant Professor, Obstetrics & Gynecology - Maternal Fetal Medicine
BioDr. Anjali Jotwani is an obstetrician and gynecologist at Stanford Health Care and a clinical assistant professor in the Department of Obstetrics & Gynecology, Division of Gynecology & Gynecologic Specialties at Stanford University School of Medicine.
Dr. Jotwani offers comprehensive obstetric and gynecologic care for patients at every stage of life, from adolescence to menopause. She specializes in obstetric care, preventive care, the perimenopause transition and menopause, and sexual health. Dr. Jotwani’s approach is rooted in trauma‑informed care and reproductive justice. She is committed to prioritizing patient perspectives, safety, and equity.
Dr. Jotwani’s research spans many areas, from the use of genetic testing during pregnancy, to factors that contribute to gynecologic cancers. Her research interests include obstetric trauma, postpartum wellness, and medical student and resident education. Dr. Jotwani has published her work in many peer-reviewed journals, including Fertility and Sterility, JAMA Oncology, and Cell. She has also delivered presentations at national conferences, including the annual meeting of the American Society for Reproductive Medicine.
Dr. Jotwani is a junior fellow of the American College of Obstetricians and Gynecologists and a member of the North American Menopause Society. -
Israel Juarez Contreras
Postdoctoral Scholar, Biochemistry
BioI am a postdoctoral scholar in the lab of Rajat Rohatgi at Stanford University, where I study how membrane organization controls sterol accessibility and signaling. I earned my Ph.D. at UC San Diego with Itay Budin, where I uncovered how sterol structure and sphingolipid composition regulate membrane phase behavior in yeast and reconstituted systems. My current work translates these biophysical principles into disease-relevant contexts, with a focus on lysosomal lipid organization and sterol trafficking defects, including those associated with NPC1. Ultimately, I aim to establish an independent research program that defines how cells interpret membrane physical properties and how their dysregulation contributes to human disease.
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Maria Juarez-Reyes
Clinical Associate Professor, Medicine - Primary Care and Population Health
BioDr. Juarez-Reyes received her PhD in Health Psychology, MD and Internal Medicine residency training from the University of California at San Francisco. Her focus during medical training was in Behavioral Medicine. In 2010, she became board certified in Integrative Medicine through American Board of Integrative Holistic Medicine. She is currently a Clinical
Associate Professor in the Division of Primary Care and Population Health, Department of Medicine, Stanford University. She is currently the Director of Behavioral Health Group Medical Visits and serves as Site Director for Internal Medicine Residency program at Stanford. She developed “Beyond Stress”, a six-week group intervention for patients with stress, anxiety, and depression. This intervention has now been translated into Spanish, Mas Alla del Estres, and it is delivered to community based Spanish speaking cancer patients.
Her current research evaluates integrative behavioral health group medical visits and the relationship to anxiety, depression, burnout, and sleep in primary care and Spanish speaking community-based populations. Previous health disparities research includes tobacco cessation practices of community-based providers, breast cancer screening follow-up in Latinx women, Latinx adolescent reproductive behavior, medication eligibility criteria effects in ethnic subgroups, and TB treatment in urban county jails. She enjoys travel, walking with friends, anything science fiction and spending time with her family.
