Carey's work focuses on the quantitative analysis of movement, using behavior, genetics, and physiology to dissect locomotion. She is interested in understanding how the
cerebellum controls coordinated movement. Her research group is focused on creating quantitative methodology to study coordinated movement. She developed an automated movement tracking system, called "LocoMouse" to capture and analyze paw, nose, and tail movements of normal mice and of mice affected by ataxia defects. Using this system, she discovered that the forward steps of the
ataxic Purkinje cell degeneration (
pcd) mice are normal, but instead they have difficulty coordinating their movement. The tracking system dissects movement defects quantitatively to more precisely pinpoint phenotypic defects. Her group recently uncovered an unexpected link between movement and learning. While examining a type of learning called "
eyeblink conditioning" in mice, Carey and her team noticed that the time to condition was highly variable between individuals and difficult to track. They noticed though, that by keeping all animals walking at a similar pace on motorized wheels, the variability diminished and the animals learned the task at a similar rate. Surprisingly, if the animals then started moving at a faster pace, they learned the task quicker. Carey also studies how changes in walking are learned through cerebellar circuits. To study this, her group built a special "split-belt" treadmill for mice. Using this device, mice learn to modulate their walking so that their front paws and back paws land at the same time, even though each side is moving at a different speed. They discovered that inhibiting
neural circuits in the cerebellum, but not the
cerebral cortex, was a detriment to learning the walking behavior. In 2015, she received an
ERC starting grant, and in 2020, she received an
ERC consolidator grant for her work. On June 17th, 2025 Carey was awarded with one of the two
ERC Advanced Grants and received €2.5M in funding for her research of cerebellar activity during rest and it's involvement in motor memories. == Scientific activities ==