Motivation is a key factor in determining one’s level of achievement, achievement of one’s goals, level of satisfaction with one’s life, and overall happiness. Although it may seem obvious, studies show that getting motivated and keeping it up is the toughest part. Very little of that has delved into the issue of metabolism. Is our ability to be motivated impacted by variations in brain metabolites?
Studying motivation
Scientists zeroed in on a region of the brain called the nucleus accumbens because of its central role in controlling processes including reward, reinforcement, aversion, and, last but not least, motivation. This research was motivated by the hypothesis that metabolic processes in the brain cause it to be constantly exposed to oxidative stress.
Neurometabolic activities in the brain can cause excessive oxidative stress, thus the researchers wanted to know if the nucleus accumbens’ antioxidant levels have any effect on a person’s motivation. Scientists investigated the connection between glutathione (GSH), the most essential antioxidant protein in the brain, and drive to find an answer to the question.
To begin, they utilized proton magnetic resonance spectroscopy, a non-invasive method of evaluating and quantifying biochemistry in a targeted region of the brain. The approach was used to assess GSH levels in the nucleus accumbens of both humans and rats. They matched the respondents’ levels of motivation to their success or failure on a battery of standardized, effort-related tasks.
Findings
Their findings showed that greater and more consistent performance on the incentive tests was linked to higher levels of GSH in the nucleus accumbens. After determining that micro-injections of a GSH blocker could reduce rat GSH production and levels, the team moved on to live tests. Less effort was put forth by the rats in tests when they were rewarded for their efforts, demonstrating a lack of motivation.
According to the results of this study, increasing motivation could be as simple as enhancing accumbal antioxidant function. The dietary supplement N-acetylcysteine that we administered in the trial can be naturally produced in the body from cysteine. Cystine can be found in protein-rich meals. Eggs, various vegetables, and whole-grain foods like breads and cereals also contain small amounts.
