Previous motor activity affects the transition from uncertainty to decision making in snails

Area of Science:

• Neuroscience
• Evolutionary Biology
• Animal Behavior

Background:

• Physical activity is known to improve cognitive functions, including decision-making, in humans and rodents.
• The evolutionary origins and cellular mechanisms underlying these benefits remain largely unexplored.
• Previous research has not investigated these effects in invertebrates.

Purpose of the Study:

• To investigate the effects of motor activity on decision-making in an invertebrate model.
• To explore the evolutionary basis of exercise-induced cognitive benefits.

Main Methods:

• The study used the pond snail (Lymnaea stagnalis) as a model organism.
• Snails were placed in a novel, dry environment to simulate a threatening situation.
• Behavioral responses, including movement patterns and speed, were recorded after a period of forced locomotion.

Main Results:

• Preceding motor activity accelerated the transition from random movement to directional crawling in snails.
• Exercise increased crawling speed but did not influence the direction choice.
• Intense locomotion led to increased activity in serotonergic neurons.

Conclusions:

• Motor activity can enhance decision-making processes in invertebrates, as demonstrated in Lymnaea stagnalis.
• The findings suggest that the cognitive benefits of physical exercise may have ancient evolutionary origins.
• This study provides a foundation for investigating the neural mechanisms of exercise and cognition at the single-neuron level.