Understanding Anorexia's Grip on the Brain Could Unlock New Therapies
Thirteen years ago, Grace Wade was on the brink of death. Her nearly year-long battle with anorexia nervosa had reached a tipping point: tests showed her heart could give out at any moment, and she was rushed to the emergency room. But she didn't care. She only wanted to go home and celebrate her 15th birthday with the two chocolate-covered strawberries she had allotted in her self-imposed calorie restrictions. It wasn't that she wanted to die. The fear of eating more and gaining weight simply felt more immediate than the reality of her heart failing.
That paradox – continuing to starve yourself despite the consequences – is why anorexia nervosa remains one of the deadliest and most challenging mental health conditions to treat. Roughly a third of those affected don't recover, even with treatment. “We could do much, much better. That is clear,” says Ulrike Schmidt at King’s College London. She is part of a growing group of researchers who, in recent years, have turned to the brain for answers, and these efforts are finally bearing fruit.
The Neuroscience Behind Anorexia
A wave of studies now suggests that anorexia nervosa alters circuits governing reward, habit and emotion – changes that may explain why eating can become so aversive, even for people who want to recover. While it is still early days, these insights are already reshaping how we think about anorexia and inspiring potential new therapies, from brain stimulation to experimental medications, that could one day shift treatment outcomes.
Anorexia nervosa is an eating disorder characterised by severe calorie restriction and an intense fear of gaining weight, typically leading to dangerously low body weight. Estimates suggest it affects up to 4 per cent of women and 0.3 per cent of men during their lifetime, though some studies indicate incidences are rising. Research suggests shifting beauty standards, social media and the stress of covid-19 lockdowns may be driving the trend. Yet anorexia predates these modern pressures, with the first cases described in the early 1870s.
Why Treatment Has Stagnated
Until the 1980s, most treatment approaches focused on identifying the external motivators driving the condition: “To be fit, to be thin, to get over some problem, to react to some insult,” says Timothy Walsh, a psychiatrist at Columbia University. But this perspective failed to account for the profound neurological changes that occur as the disorder takes hold. As a result, treatment has remained stagnant for years, with one-third of people not recovering even with intervention.
Recent neuroscience research is beginning to change that. By studying the brains of people with anorexia, scientists have identified disruptions in reward processing, habit formation, and emotional regulation. For example, the brain's reward system may become rewired to find food aversive while deriving pleasure from restriction. Similarly, starvation can become a deeply ingrained habit, making it incredibly difficult to break even when the person consciously desires recovery.
New Therapeutic Avenues
These findings are inspiring novel treatment approaches. Brain stimulation techniques, such as transcranial magnetic stimulation (TMS), are being explored to modulate the neural circuits involved in anorexia. Experimental medications that target specific neurotransmitter systems are also under investigation. While these therapies are not yet standard, they offer hope for the many individuals who do not respond to existing treatments.
The goal is to move beyond simply addressing external pressures and instead directly target the brain changes that perpetuate the disorder. By understanding how anorexia takes over the mind, researchers hope to develop interventions that can break its grip and improve recovery rates.
Looking Ahead
The road ahead is long, but the shift toward neuroscience-based approaches marks a significant departure from decades of stagnant treatment. As Ulrike Schmidt and her colleagues continue to unravel the brain mechanisms underlying anorexia, the prospect of more effective, personalized therapies grows closer. For the millions affected by this devastating condition, that is a glimmer of hope worth pursuing.
This article is based on reporting by New Scientist. Read the original article.
Originally published on newscientist.com
