Mild head knocks can cause lasting brain damage, expert warns
Even a slight knock to the head can have an impact on the brain, causing long-lasting cognitive and behavioural changes.
That’s according to CQUniversity’s neuroscience expert and adjunct senior lecturer Dr Ragnar Purje.
A new analysis on head knocks by Dr Purje in Psychology Today sheds light on the far-reaching consequences of head injuries, revealing that even low-level impacts can disrupt neural function across the entire brain.
His findings emphasise that these effects are particularly concerning for children and young athletes, as their developing brains are more vulnerable to trauma.
"The principles of physics indicate that when an impact to the head occurs, energy reverberates throughout the brain, affecting neurons, synapses and motor functions," Dr Purje explained.
“This research shows that the effects of brain injuries are not always as localised as previously believed."
Dr Purje’s work aligns with other studies demonstrating that repetitive head trauma – whether concussive or sub-concussive – can result in cognitive and behavioural changes over time.
Dr Purje’s research highlights the heightened risk for young athletes in sports like boxing, where repetitive head impacts can lead to long-term neurological deficits.
“Research strongly indicates that children should not engage in head-hitting boxing at all," he stated.
"Even sub-concussive impacts can have long-term neurological consequences.”
Dr Purje is calling for increased awareness among parents, coaches, educators and healthcare professionals, urging preventive measures and modifications in high-impact sports to protect long-term brain health.
CQUniversity’s Head of Neuroscience, Professor Ken Purnell praised Dr Purje’s work on brain trauma.
"This work on brain trauma, particularly the findings about low-level head impact having broader effects beyond the impact site, are excellent and of great value to parents, coaches and others. This work is truly impactful."
Dr Purje’s work also underscores the importance of advanced brain imaging techniques, such as diffusion tensor imaging, to detect traumatic brain injury effects more accurately.
“New imaging methods show how brain trauma disrupts overall function, explaining why different head impacts can lead to similar cognitive symptoms.”
Dr Purje has previously worked with former world champion boxer Johnny Famechon after he acquired a severe brain injury after being hit by a car while walking.
His doctoral thesis, as supervised by Professor Purnell, and work on acquired brain injury therapy through movement has been well documented.
