Chronic traumatic encephalopathy (CTE) is a degenerative brain disease that is associated with repeated head impacts and injuries. CTE can cause cognitive, behavioural, and emotional problems, such as memory loss, depression, aggression, and dementia. CTE can only be diagnosed after death by examining the brain tissue for abnormal deposits of the protein tau.
Tau is normally found in neurons and helps stabilise their structure and function. However, repeated head trauma can cause tau to become misfolded and clump together in tangles, which interfere with the normal functioning of neurons and cause them to die. The tau tangles also spread to other regions of the brain over time, affecting different cognitive and emotional functions. The disease is classified as a tauopathy, a group of neurodegenerative diseases that share this common feature.
CTE has been found in the brains of many former athletes who played contact sports, such as American football, boxing, and rugby. Rugby is a popular sport in the UK, with millions of players at various levels, from amateur to elite. Rugby involves frequent collisions and tackles, which can result in mild TBI. These impacts can damage the brain and increase the risk of developing CTE. CTE in rugby was the lead story in the Times today.
A recent study by Stewart and colleagues examined the brains of 31 former rugby players who donated their brains to research institutes in the USA, UK, and Australia. The study found that 21 of the 31 brains (68%) had CTE. The study also found that the risk of CTE increased with the length of rugby career, with every extra year of play increasing the risk by 14%. The study did not find any difference in the risk of CTE between amateur and elite players, or between forwards and backs.
The study suggests that rugby players are at a high risk of developing CTE, and that the risk is related to the duration of exposure to head impacts, rather than the level or position of play. The study also highlights the need for more research on the prevalence and severity of CTE in rugby players, as well as the potential long-term consequences of the disease.
The study has implications for the prevention and management of head injuries in rugby. The rugby authorities, such as World Rugby, the Rugby Football Union, and the Welsh Rugby Union, have a duty of care to protect the players from brain injury and its consequences. They should implement measures to reduce the frequency and intensity of head impacts in rugby, such as lowering the tackle height, enforcing the concussion protocols, and limiting the number of games and contact sessions. They should also provide education and support to the players, coaches, referees, and medical staff on the recognition and removal of head injuries, and the importance of seeking medical attention and following the return-to-play guidelines.
Rugby is a contact sport that involves a high risk of head injuries and concussion. Therefore, there are several measures in place to prevent, recognise, and manage concussion in rugby players. Some of these measures are:
• World Rugby has developed a Concussion Guidance document for non-elite level rugby players and non-medical professionals, which provides information on what is concussion, its causes, symptoms, recognition, management, and return to play. It also includes medical referral indicators and resources for advanced care.
• World Rugby has also introduced a Head Injury Assessment (HIA) protocol for elite adult teams, which is a three-stage process to assist with the identification, diagnosis, and management of head impact events with the potential for concussion. The HIA protocol consists of an off-field assessment tool, a post-game assessment, and a 36-48-hour post-injury assessment.
• World Rugby has also launched a Recognise and Remove campaign, which aims to educate players, coaches, parents, and officials on how to spot the signs of concussion and how to safely remove players from the field of play. The campaign also promotes the importance of seeking medical attention and following a graduated return to play protocol.
• World Rugby has also implemented a six-stage Graduated Return to Play protocol, which must be followed by players who have been diagnosed with concussion before they can participate in full contact training or playing. The protocol includes a period of rest, symptom-limited activity, non-contact training, full contact practice, and return to play.
• World Rugby has also established a HIA Review Process, which monitors and evaluates the compliance and performance of the HIA protocol by teams and match officials. The review process involves independent experts who analyse the video footage and medical reports of all head impact events and provide feedback and recommendations.
CTE is a serious and potentially preventable brain disease that affects many former rugby players. It is vital that the rugby community continues to take action to protect the current and future generations of players from this devastating condition.