Main Site "Silo"

Christie Yeung

Research Coordinator

Christie grew up in San Francisco Bay Area and graduated from San Francisco State University in 2010 with a bachelor of science degree in apparel design and merchandising with a minor in marketing. While attending school, she became interested in gerontology and worked as a research associate at UCSF in the Department of Geriatrics under Principal Investigator Alexander Smith, MD, MPH. It was then that she put her native language, Cantonese, to use as she studied and interviewed participants for multiple studies which included the publishing of the journal article ”Perceptions of Successful Aging Among Diverse Elders with Late-Life Disability."

Outside of her career life, you will find Christie reading her favorite magazines at local coffee shops, hiking, and attending art & wine festivals. Christie joined the UCSF Memory and Aging Center in October 2014 working under Dr. Howie Rosen. She is a research coordinator for the Alzheimer's Disease Research Center (ADRC) and the Care Ecosystem study.

Gabe Marx

Assistant Clinical Research Coordinator

Gabe grew up in the Bay Area before heading to Ohio to study neuroscience at Oberlin College, graduating in 2014. During his summers, Gabe garnered research experience by working in various neuroscience labs such as Dr. Sofia Vinogradov’s lab at the San Francisco VA researching cognitive training as a therapy for sensory deficits in schizophrenia as well as Dr. Rene Hen’s lab at Columbia University investigating hippocampal neurogenesis in rodent models. Gabe first began his work in neuroimaging while studying abroad in Budapest, Hungary. While working at the Budapest Center for Complex Systems and Computational Neuroscience, Gabe worked on advanced techniques in connectivity analysis of functional MRI data. This work was continued back at Oberlin with his advisor, Dr. Patrick Simen. There, Gabe investigated networks activated in two-point decision making paradigms through fMRI data.

Gabe joined the Memory and Aging Center in September 2014. He is an imaging core analyst and clinical research coordinator for Dr. Rosen’s Neuroimaging in Frontotemporal Dementia study—a longitudinal study aimed at determining which imaging modalities and biomarkers help predict the onset and monitor the progression of frontotemporal dementia.

Gabe currently lives in Oakland. In his free time, Gabe is an active musician and songwriter.

Queena Lin

Postdoctoral Scholar

Queena (Li-Chun) Lin completed her PhD in neurobiology (Sibille Laboratory of Translational Neuroscience Program, University of Pittsburgh), with a focus on the selective vulnerability of GABAergic interneurons in human and mouse. She joined the Seeley Selective Vulnerability Research Laboratory in September 2014 and is studying the patterns of selective vulnerability in progressive supranuclear palsy and frontotemporal dementia by quantitative neuroanatomy and next generation sequencing.

Nagehan Ayakta

Research Associate

Nagehan graduated from University of California, Berkeley in May 2014 with honors and a bachelor's degree in Molecular and Cell Biology-Neurobiology. She completed her honors thesis at the Jagust laboratory under the guidance of Dr. William Jagust and Dr. Sylvia Villeneuve at the Helen Wills Neuroscience Institute. Her main focus was investigating the temporal and spatial pattern of beta-amyloid accumulation in healthy adults.

At the Memory and Aging Center, Nagehan is a research associate working with Dr. Gil Rabinovici and also continues to work with the Jagust laboratory at Berkeley. Currently she is working on a variety of PET imaging projects studying amyloid, hypometabolism, and tau.

Luke Bonham

Research Coordinator

Luke grew up in Southern California before attending UC Berkeley. Graduating with a degree in business administration, he joined the UC San Francisco Memory and Aging Center in 2013. Prior to joining the Memory and Aging Center, he worked in Dr. Dena Dubal’s lab at UCSF to study sex differences in mouse models of neurodegenerative diseases. He currently works with Jennifer Yokoyama, PhD, and Howard Rosen, MD, to study the genetics of healthy aging and neurodegenerative diseases.

In his free time, Luke likes to ski, camp and hike.

Samir Datta

Research Coordinator

Originally from San Jose, Samir graduated from Northwestern University in 2014 with a bachelor's degree in cognitive science. At Northwestern, he worked as a research assistant in an auditory research laboratory on two main projects: examining the variability of hearing thresholds at the lower end of the frequency range and exploring the effects of psychoacoustic training on otoacoustic emissions. Samir also volunteered in a visual cognition lab, assisting with the generation of visual stimuli for experiments. Samir has been with Dr. Howard Rosen’s lab as a research coordinator since July 2014, assisting with an emotional learning and insight study as well as writing scripts to expedite the data analysis. In his free time, Samir enjoys playing piano/guitar, cooking and spending time with his dogs.

Isabel Hubbard, PhD

Speech Language Pathology Specialist

Dr. Hubbard graduated with a BA degree in speech language pathology from the University of Tennessee and a MS degree in communication disorders from the University of Texas at Dallas. She recently completed her PhD degree in the lab of Dr. Julius Fridriksson at the University of South Carolina. Her research interests include aphasia treatment and recovery in stroke and neurodegenerative disease.

Joanna Hellmuth, MD, MHS

Behavioral Neurology Fellow

Joanna Hellmuth, MD, MHS, joined the UCSF Memory and Aging Center in July 2014 as a behavioral neurology fellow. She provides care to patients with various neurodegenerative disorders and collaborates in the evaluation of patients for the Alzheimer's Disease Research Center (ADRC) and frontotemporal dementia program project grant.

Lisa Kritikos

Research Coordinator

Lisa Kritikos joined the Memory and Aging Center in 2014. Her primary role is managing the New Approaches to Dementia Heterogeneity research, which follows patients with the goal of learning more about dementia to improve early detection and clinical care for patients as part of the UCSF Alzheimer's Disease Research Center.

Julio C. Rojas, MD, PhD

Behavioral Neurology Fellow

Julio Rojas received his medical degree from the Tecnológico de Monterrey School of Medicine in Monterrey, Nuevo León, Mexico. He completed his doctoral studies in neuroscience at the University of Texas at Austin with a dissertation on Strategies of neuroprotection in an in vivo model of retinal degeneration induced by mitochondrial dysfunction. He completed neurology residency at UT Southwestern Medical Center in Dallas. In 2014, he joined the UCSF Memory and Aging Center where he is a behavioral neurology fellow. Dr. Rojas is part of the Clinical Trials team led by Dr. Adam Boxer in which he participates in patient evaluation and monitoring. He provides care to patients with various neurodegenerative disorders and collaborates in the evaluation of patients for the Alzheimer's Disease Research Center (ADRC), frontotemporal dementia program project grant and Rapidly Progressive Dementia Program. Dr. Rojas is interested in experimental neurotherapeutics, and his research focuses on biomarker development and cognitive enhancing interventions.

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