OIST Study Links Acetylcholine to Habit Shifts in Mice, Using 2-Photon Brain Imaging
Updated
Updated · ScienceAlert · Jun 16
OIST Study Links Acetylcholine to Habit Shifts in Mice, Using 2-Photon Brain Imaging
2 articles · Updated · ScienceAlert · Jun 16
Summary
Mouse experiments at OIST found that acetylcholine surged when a familiar reward route suddenly stopped working, and higher release tracked with more “lose-shift” behavior as animals changed course.
Using a virtual maze, two-photon microscopy and a genetically encoded sensor, researchers watched acetylcholine release in real time as mice learned a path and then faced an unexpected reward switch.
Mice with inhibited acetylcholine production became more rigid after failure, strengthening the case that the neurotransmitter helps break habits and supports behavioral flexibility.
Some cholinergic cell clusters barely responded or reduced activity, suggesting the brain may preserve old reward-path information in case conditions reverse again.
The Nature Communications study points to a mechanism relevant to addiction, obsessive-compulsive disorder and schizophrenia, though researchers said behavioral flexibility depends on broader brain circuits beyond acetylcholine alone.
A brain chemical dictates our response to disappointment. Can we harness it to more effectively treat addiction and OCD?
If one neurotransmitter governs behavioral flexibility, could we enhance it to accelerate learning and overcome mental roadblocks?
Acetylcholine Surges in the Striatum Enable Habit-Breaking: New Insights Into Behavioral Flexibility and Neuropsychiatric Disorders
Overview
A recent study from the Okinawa Institute of Science and Technology (OIST), published in Nature Communications, has made a major breakthrough in understanding how the brain enables behavioral flexibility. Using advanced imaging techniques in mice, the researchers discovered that when mice faced an unexpected loss of reward in a virtual maze, there was a rapid increase in acetylcholine release within the striatum. This surge in acetylcholine was closely linked to the animals’ ability to break old habits and try new strategies, highlighting acetylcholine’s pivotal role in helping the brain adapt to changing situations.