Opioids may affect how we perceive 'cuteness' of babies

Addiction to opioids -- which includes illicit drugs such as heroin as well as medications commonly prescribed for pain -- affects over 4 million people in the USA. It is associated with reduced responses to natural rewards as well as abnormal social behaviour, such as crime and dysfunctional parenting. Now a group of US researchers is using our normal response to the 'cuteness' of babies, (a concept first described by the famous Austrian ethologist Konrad Lorenz as Kindchenschema) to experimentally test the effects of social cognition in individuals with opioid addiction.

Baby schema is a set of visual characteristics typical of human and animal babies, which makes them more adorable or "cute'. They include such features as large eyes, big foreheads, and small chins, which over evolution we have come to subconsciously recognise as characteristic of infants and inviting caretaking, so much so that we have incorporated these features into dolls, cartoon characters, adverts, and even car design, etc.

Earlier research by researchers at the Universities of Pennsylvania (US) and Muenster (Germany) showed that response to baby portraits produces motivation for caretaking and a response in the area of the brain associated with reward proportionate to the Kindchenschema content of the portraits (Glocker, et al, Proceedings of the National Academy of Sciences of the USA, 2009 and Glocker, et al, Ethology 2009: see below for full citation and acknowledgement for image rights).

Professors Daniel Langleben, An-Li Wang and their team of the University of Pennsylvania hypothesized that chronic opioid abuse may affect the brain response to baby schema. They recruited 47 opioid- dependent adults who were starting treatment with an opioid blocker naltrexone and measured how they responded to the baby schema task while recording their brain activity using an fMRI (functional Magnetic Resonance Imaging) scanner, before and after 10 days of treatment with naltrexone.

According to Professor Daniel Langleben, "We found that the brains of people with opioid dependence didn't respond to the baby schema. When they were given a drug that blocked the effects of opioids, the response became more similar to the healthy people. This may indicate the mechanism underlying problems with social cognition deficits in people who abuse opioids.

In summary, treatment with opioid modulators seems to be changing the brain response to baby schema and may modulate our motivation to care for others. Our data also raise the question whether opioid medications may affect social cognition in general. Depending on the clinical context such effect could be either desirable or not. Opioids are some of the most common medications in the world, often taken on a long term basis, so this is something to consider."