As a blogger, I often need to think outside the box. Unfortunately, there are times when I run into dead ends. This is usually when I head over to the kitchen and grab a Snickers. I nibble on it for as long as I don’t hit my Eureka moment. Now I have an unhealthy dependency on Snickers whenever I am stuck, a habit I am desperately trying to break. However, new studies reveal a biological hack for breaking bad habits—disappointment. The findings can improve how we perceive and deal with conditions that make it difficult to break habits, including addiction, obsessive-compulsive disorder (OCD), and Parkinson’s disease.
Science Behind How Habits Form
Our brain is wired to seek pleasure, and our sensory nervous system constantly monitors actions that release dopamine— the feel-good chemical. A habit loop has three parts: a cue or trigger, a response to the cue, and the reward. When a pattern is established between action and satisfaction, the brain files the information in the basal ganglia.
Triggers like stress or boredom can lead to various habits, from nail-biting to binge eating. More recently, scrolling through hyper-fast, low-effort content informally called “brainrot” has begun to affect our attention spans and patience. The algorithm often traps users in a loop by showing posts that negatively affect their emotional state—leading to obsessive scrolling, often called “doomscrolling.”
How Does the Brain React to Disappointment?
To investigate, researchers trained mice to navigate a virtual maze along a route that led to a reward. Gradually, the animals developed a reliable strategy to reach the reward. Once they adopted the strategy, the scientists changed the rules.
After the reward pathway was switched, the mice unexpectedly failed to receive the expected reward. The researchers monitored activity in the mice’s brains using two-photon microscopy as the mice reacted to this surprising outcome.
First author Dr. Gideon Sarpong said they observed a significant increase in acetylcholine secretion in certain brain regions. The mice also displayed ‘lose-shift’ behavior, changing their choices in the maze after receiving no reward. The increase in acetylcholine was linked to changes in their future choices. In a way, the mice were able to switch their old habits and strategy, and enable new choices, which demonstrates the importance of acetylcholine in the process.
To conclude whether acetylcholine was really responsible for breaking habits, the team reduced the animals’ ability to produce the chemical. The mice in this group became more rigid and less inclined to adjust their decisions in response to unexpected outcomes. The findings confirmed that acetylcholine plays a central role in helping the brain adapt to changed situations.
However, not every group of neurons involved in acetylcholine release responded in the same way. While most released more acetylcholine, some small clusters of cells showed negligible change or even decreased activity. According to the researchers, this involves preserving information about previously successful behaviors that can be used when the situation changes again, and it may be linked to possible relapse of a behavior.
The Brain has a Disappointment Meter
A study published on May 8 in Current Biology by neuroscientists from the University of Oregon identified a group of brain cells that essentially act as a “disappointment meter” to gauge whether rewards align with expectations. The researchers describe a specific group of neurons that become active in a mouse brain when it is let down, and the brain detects and records the circumstances.
Assistant biology professor at the University of Oregon, Emily Sylwestrak, suggests that mapping cell types that react to disappointment can lead to a new class of medications that better treat neuropsychiatric conditions like depression and addiction. Her investigation focused on the lateral habenula, also colloquially known as the brain’s “anti-reward center.” This region becomes more active in response to negative events, such as punishment or the loss of a reward.
Breaking a habit denies the trigger-reward cycle, which numbs dopamine secretion, which is directly correlated with a spike in lateral habenula activity. Acetylcholine helps shift the focus from an old strategy to a new one that can offer rewards.
How will the Research Aid Addiction, OCD and Parkinson’s
Behavioral flexibility is not regulated by a single neurotransmitter, such as acetylcholine, or by a single brain cell type. Rather, multiple brain regions and chemical signaling systems form a large network that helps animals and humans adapt to changing situations.
However, the new study establishes that the striatum, where the interneurons that secrete acetylcholine are held, is a central component of the system. Beyond basic neuroscience, the research can point to a new switch for treating neurological and psychiatric disorders.
“Acetylcholine levels are often altered in treatments for neuropsychiatric disorders like Parkinson’s disease or schizophrenia, so understanding the function of this neurotransmitter is essential in treating many neuropsychiatric disorders,” explains co-author Professor Jeffery Wickens, head of the Neurobiology Research Unit at Okinawa Institute of Science and Technology (OIST) Graduate University.
“In particular, with conditions such as addiction and obsessive-compulsive disorder we see a difficulty in breaking habits and shifting behavior. So, understanding the mechanics of behavioral flexibility may one day help us develop better treatments.”
Five-Step Framework to Break Bad Habits
Habits can become involuntary responses, molding the brain to the point that they become unconscious, set behaviors. However, we also set “resolutions”—healthy habits to adopt. Research shows that half of the population fails to sustain those resolutions, mostly because we don’t make a conscious effort to adopt good habits through self-directed neuroplasticity (the brain’s ability to change throughout life).
As much as bad habits take over our lives, we can dial up positive habits and practices too. Here is a five-step framework as listed on healthline:
- Pause: Reflecting on your efforts and results builds new neural connections.
- Discover: Make sure you understand why your goal matters to you.
- Diagnose: Identifying friction points or roadblocks and removing them is important. Create boundaries that will help keep you on track.
- Prescribe: Figure out your ideal game plan and personalize it to your interests and skills. Want to move more but hate to run? Dance or swim instead.
- Practice: As they say, done is better than perfect. Don’t get stuck in an “all-or-nothing” mindset for creating new habits. You’re not a failure if you aren’t going to the gym for an hour each day. Instead, take baby steps. Be flexible and forgiving with yourself.
____________________________________________________
Substance abuse has skyrocketed by 20% in the last decade. Read this article to fathom how recreational drug use poses an unforeseen threat to humans. Share it with your loved ones, or those in need.
Copyright @smorescience. All rights reserved. Do not copy, cite, publish, or distribute this content without permission.
