[Interhemispheric motor asymmetry of conditioned feedback]

Area of Science:

• Neuroscience
• Comparative Psychology
• Behavioral Neuroscience

Context:

• Investigating interhemispheric asymmetry and motor function lateralization.
• Utilizing backward conditioning in canine models.
• Examining food-procuring instrumental conditioning paradigms.

Purpose:

• To determine the relationship between backward conditioning and motor lateralization.
• To identify early indicators of paw preference and brain hemisphere dominance.
• To assess if backward connections predict the sign and presence of functional asymmetry.

Summary:

• Two dogs, later identified as right- and left-pawed, were studied for motor function lateralization using backward conditioning.
• The right-pawed dog showed left hemisphere dominance, while the left-pawed dog exhibited right hemisphere dominance.
• Earliest signs of motor lateralization were observed in backward conditioned connections, preceding direct conditioned reflexes.

Impact:

• Backward connections serve as early predictors for the presence and direction of functional asymmetry.
• Findings suggest backward connections are specific and mirror the lateralization of direct conditioned responses.
• Provides insights into the developmental trajectory of lateralization in motor behaviors.