We are building a group of like-minded scientists who are passionate about understanding the complexities of the brain. We focus on understanding multiple aspects of brain physiology, from the biological mechanisms that regulate how blood flows throughout the brain in health and in disease, to the mechanisms by which cerebrospinal fluid flows and contributes to brain cleaning. The lab is located in the department of physiology at the University of Maryland Baltimore School of Medicine. We are currently looking to hire passionate, talented students and postdocs. If you are interested in learning more and potentially working with us, please use the contact form to get in touch!

Tom Longden, PhD
Principal Investigator

I received both my B.Sc with honors and my PhD in Pharmacology from the University of Manchester in the UK, and I then completed my postdoctoral training under Mark Nelson at the University of Vermont. I am passionate about ion channels, GPCRs, cerebral blood flow, and I am fascinated by pericytes. When I am not in the lab peering into a microscope, I am usually walking my dog or reading. My aim is to build a nurturing environment in which scientists can develop their ideas and contribute answers to some of the big questions in cardiovascular biology and neuroscience.

Ashwini Hariharan, PhD
American Heart Association Postdoctoral Fellow

I grew up in Mumbai, India where I received my bachelor’s degree in Pharmaceutical Sciences followed by a master’s degree in Pharmacology and Toxicology. I recently graduated with a PhD in Anatomy from the University of Otago in Dunedin, New Zealand; my doctoral research focused on the implications of endothelial nitric oxide synthase deficiency for Alzheimer’s disease. I am interested in exploring the intricacies of cerebrovascular function, especially in relation to neurodegeneration. Besides science, I enjoy reading and traveling.

Nick Weir, PhD
Postdoctoral Fellow

 I received my B.Sc (Pharmacology and Physiology), M.Sc (Neuropharmacology) and PhD (Biomedical Engineering) from Nottingham Trent University, UK. My doctoral research focused on generating and characterising cortical organoids using mass spectrometry and transcriptomic techniques. I recently started my postdoctoral training with the Longden lab and am interested in learning new techniques and exploring mechanisms of vascular plasticity within the brain. In my free time, I enjoy cooking, exercise and board games.

Liuruimin (Amy) Xiang
Graduate Student, Program in Neuroscience

I originally came from Guangzhou, China and I earned my BA in neuroscience from Wesleyan College in Macon, Georgia. During my college years, I started learning patch clamp and picked up a passion for ion channels. Currently, I am fascinated by different types of ion channels in different vascular cells and how they contribute to controlling blood flow. In my free time, I enjoy sports and gaming. If I am not sitting in front of the patch rig, then I may be playing badminton in the gym.

Abby Vigdermann
Graduate Student, Program in Neuroscience

I received a double B.S./B.A. in neuroscience and psychology from Brandeis University. I have worked in labs studying sleep and circadian rhythms in Drosophila melanogaster and chronic stress response in rats, both at the University of Pennsylvania. I am interested in the role neurovascular coupling plays in various processes such as learning and memory and the stress response. Outside of lab, I write and play music, consume pop culture content, and spend quality time with my cat.

Dom Isaacs
Graduate Student, Program in Neuroscience

My name is Dom, I joined the Longden lab as a neuroscience PhD student where I am interested in the ways actively computing neurons meet their energy needs to sustain both computation and cell health. I hold BS/MS degrees in bioengineering from the University of Colorado, where my master’s thesis work focused on investigating biophysics and electrophysiology with advanced light microscopy techniques.
In my free time I enjoy mountain biking, playing music, (trying) artistic endeavors, and seeing my German shepherd, Storm.

Serena Edwards
Lab Technician

I am originally from Port Antonio, Jamaica, but then migrated and entered my first lab at SoBran Institution at 16 years old. I then went onto dual enrollment while in high school earning both my Lab Animal Science and Biotechnology certification in 2018. Currently I am a biology major working towards my Bachelors in science. My long term goal is to become a veterinarian. In my free time I enjoy watching different anime, often engaging in horror games on my console and romance novels. 


Isabella Zafra, Rotating Graduate Student (2021)PhD candidate in Molecular Medicine at University of Maryland.
Barry Huang, Lab Manager (2019-2021)M.D candidate at New York Institute of Technology .
Ryan Mayers, Rotating Graduate Student (2021)PhD candidate in Neuroscience at University of Maryland.
Colin Robertson, Rotating Graduate Student (2020)PhD candidate in Neuroscience at University of Maryland.
Daniela Garcia, Postdoctoral Fellow (2019).
Cullen Ross, Lab Manager (2018-2019), now PhD candidate in Molecular Medicine at University of Maryland.