We've updated our Privacy Policy to make it clearer how we use your personal data. We use cookies to provide you with a better experience. You can read our Cookie Policy here.


Obesity Risk Factors Revealed by Brain Imaging

Obesity Risk Factors Revealed by Brain Imaging content piece image
Impact of obesity risk factors on brain function. a) Family-related risk factors (parents’ obesity and diabetes) were associated with altered insulin signalling in the subject’s widespread brain regions. More yellow colour signifies stronger association. b) Family-related risk factors were associated with decreased opioid receptor availability in regions related to producing pleasure in the subject’s brain. Lighter blue colour signifies stronger association. The original image has been published in the International Journal of Obesity. Credit: University of Turku
Listen with
Register for free to listen to this article
Thank you. Listen to this article using the player above.

Want to listen to this article for FREE?

Complete the form below to unlock access to ALL audio articles.

Read time: 1 minute

Obesity risk factors of family background are associated with changes in the brain function, finds a study conducted at the Finnish Turku PET Centre. The results show that the function of neural networks regulating satiety and appetite is altered already before a person develops obesity.

Obesity is a globally increasing health problem, and new interventions to prevent and treat obesity are needed. Obesity is linked to changes in brain insulin sensitivity and neurotransmitter function. These changes may explain increased appetite and overeating. 

However, thus far it has not been determined whether these changes are visible in the brain already before a person develops obesity, and if these changes would increase the risk for future obesity, says Doctoral Candidate Tatu Kantonen from the Department of Clinical Medicine of the University of Turku.

Kantonen’s study investigated changes in the brain in pre-obesity by studying the insulin, opioid, and cannabinoid function through PET imaging. The participants of the study consisted of 41 young men with varying number of obesity risk factors.

The results showed that family-related risk factors such as parents’ obesity or diabetes were associated with altered insulin signalling in the subject’s brain as well as reduced function of the opioid and cannabioid systems.

Disturbance in the neural networks controlling satiation and appetite can therefore be observed already before a person develops obesity, and these brain changes are connected to family-related risk factors of obesity. The results may have implications for the development of prevention and treatment interventions for obesity. They show that the brain and central nervous system are important targets in the treatment of obesity, says Kantonen. 


Kantonen T, Pekkarinen L, Karjalainen T, et al. Obesity risk is associated with altered cerebral glucose metabolism and decreased μ-opioid and CB1 receptor availability. Int J Obes. Published online November 2, 2021:1-8. doi:10.1038/s41366-021-00996-y

This article has been republished from the following materials. Note: material may have been edited for length and content. For further information, please contact the cited source.