Cognitive Decline in Dogs Linked to Shorter Front Limb Stride Length, Study Finds
New research published in *Frontiers in Veterinary Science* has identified a connection between cognitive decline in dogs and a reduction in stride length, particularly in their front limbs. The findings, led by Natasha Olby, professor of neurology and a chair in gerontology at North Carolina State University’s College of Veterinary Medicine, could offer a new tool for early detection of canine dementia.
What Did the Study Involve?
The study followed 88 geriatric dogs, with an average age of 12 years, over multiple six-month intervals. Each dog underwent comprehensive evaluations, including physical, neurologic, and orthopedic exams, as well as mobility assessments and cognitive testing. Owners completed the Canine Dementia Scale (CADES) and Canine Brief Pain Inventory (CBPI) at each visit.
Gait analysis was conducted by trained observers as dogs walked a five-meter indoor walkway. Researchers measured stride length for both front (thoracic) and back (pelvic) limbs, adjusting for height. The results showed that owner-reported cognitive decline was associated with shorter thoracic limb stride length, even after accounting for age and pain scores.
Why Does This Matter for Dog Owners?
The study highlights a potential biomarker for cognitive decline in dogs. A 10-point increase in CADES scores—used to assess dementia symptoms—corresponded to a 1.2% reduction in thoracic limb stride length. Olby noted that thoracic limbs, which play a role in braking and postural stability, are more influenced by cortical functions like spatial awareness than pelvic limbs, which primarily drive movement.
“Our results show that cognitive decline does have a small effect on stride length and this could serve as an early indicator of functional decline in aging dogs,” Olby said. While stride length alone is not diagnostic, it could complement other tools to monitor a dog’s cognitive and overall health trajectory over time.
How Can This Research Help Veterinarians?
The findings provide veterinarians with a method to track cognitive changes in older dogs. By integrating gait analysis with existing assessments like CADES, practitioners may detect dementia earlier.
The research was supported by the Dr. Kady M. Gjessing and Rhanna M. Davidson Distinguished Chair of Gerontology at NC State’s College of Veterinary Medicine.
What Are the Broader Implications?
The study aligns with human research linking gait changes to cognitive impairment. Olby emphasized that while the effect size is small, monitoring stride length over time could offer insights into a dog’s health trends.
What’s Next for Canine Dementia Research?
For now, the study underscores the importance of holistic care for aging pets, combining behavioral, physical, and gait assessments to improve quality of life.
Source: Frontiers in Veterinary Science
Source: North Carolina State University