Reduced grey matter in frontal lobes linked to teenage smoking and nicotine addiction

A team of scientists, led by the universities of Cambridge and Warwick in the UK and Fudan University in China, analysed brain imaging and behavioural data of over 800 young people at the ages of 14, 19 and 23.

They found that, on average, teenagers who started smoking by 14 years of age had markedly less grey matter in a section of the left frontal lobe linked to decision-making and rule-breaking.

Grey matter is the brain tissue that processes information and contains all of the organ’s neurons. While brain development continues into adulthood, grey matter growth peaks before adolescence.

Low grey matter volume in the left side of the ventromedial prefrontal cortex may be an “inheritable biomarker” for nicotine addiction, say researchers – with implications for prevention and treatment.