Functional MRI in awake unrestrained dogs.

Area of Science:

• Canine cognition
• Neuroscience
• Animal behavior

Background:

• Dogs' long co-evolution with humans suggests specialized sensitivity to human cues.
• Understanding the canine mind and its cognitive processes remains a key research question.

Purpose of the Study:

• To develop a non-invasive methodology for studying canine brain activity using fMRI.
• To investigate which brain circuits in dogs respond to human hand signals indicating reward presence or absence.

Main Methods:

• Two dogs were trained using positive reinforcement to remain still during fMRI scans without sedation.
• A functional magnetic resonance imaging (fMRI) task was designed to differentiate brain responses to hand signals for reward versus no-reward.
• Head motion was minimized to less than 1 mm within trials to ensure data quality.

Main Results:

• The study successfully collected high-quality fMRI data from dogs without sedation or restraint.
• Both dogs exhibited significant activation in the caudate nucleus in response to the hand signal associated with a food reward.
• This activation pattern aligns with established findings in reinforcement learning literature.

Conclusions:

• The developed fMRI methodology is effective for studying canine brain function.
• Canine caudate activation in response to reward cues suggests conserved neural mechanisms for processing incentives.
• This research provides a foundation for further exploration into the neural basis of canine cognition and human-dog interaction.