Paw switching with lateralized cholinergic modulation

Area of Science:

• Neuroscience
• Behavioral Biology
• Cholinergic Signaling

Background:

• Motor preferences, such as handedness, are linked to brain asymmetries.
• These preferences are generally stable but can change with experience.
• The neural mechanisms underlying preference switching are not well understood.

Purpose of the Study:

• To investigate the neural basis of experience-driven shifts in paw preference in mice.
• To determine the role of cholinergic signaling in motor preference plasticity.
• To understand how interhemispheric communication influences motor control.

Main Methods:

• Developed a behavioral paradigm to induce paw preference switching in mice.
• Utilized selective activation and inhibition of cholinergic neurons.
• Monitored endogenous cholinergic activity during lateralized movements.

Main Results:

• A subset of mice exhibited stable paw preference changes after training.
• Modulating cholinergic neuron activity unidirectionally biased switching behavior.
• An endogenous imbalance in cholinergic activity was observed during lateralized movements.

Conclusions:

• Asymmetric cholinergic modulation between hemispheres is a key mechanism for experience-driven motor preference shifts.
• Cholinergic signaling dynamically regulates lateralized motor control and motor flexibility.
• Interhemispheric cholinergic asymmetry provides insight into the neural basis of persistent motor preferences.