John Beattie is currently working with the BBC in an attempt to gather information about the impact of Chronic Traumatic Encephalopathy (CTE) which is a result of repetitive blows to the head.

The clip below is an extract from an interview conducted with former Scottish former rugby union player, John Shaw, and features a disturbing "cut out" suffered by Shaw.

Has rugby damaged players' brains? John Shaw has a "cut out" talking to @BBCJohnBeattie https://t.co/aiOO4lBXRmhttps://t.co/zlDeh1e1Dk

— BBC Scotland News (@BBCScotlandNews) February 15, 2016

The 47-year-old, who was capped by Scotland A and played for Glasgow, appears unable to remember the question just seconds after he’s asked about his future.

The brain shut down is a worrying symptom of what could well be a result of CTE.