Is concussed Crow ducking mad?

Bad news for Crows fans as Adelaide's Tom Lynch goes down injured once again due to a head injury.

Tom Lynch is helped off the ground after collision with Jack Ziebell. Picture: Sarah Reed Source: News Corp Australia

IT'S a reflex action which has the potential to land Adelaide forward Tom Lynch in hospital with serious injuries.

Lynch was felled during Adelaide's 10-point NAB Challenge win against North Melbourne trying to duck a Jack Ziebell tackle.

The 23-year-old took no further part in the match after being stretchered from the field for the second time in as many appearances.

The incident is likely to reignite the debate about players ducking their head to avoid front on contact.

Crows' medical staff stabilise Tom Lynch's neck. Picture: Getty Source: Getty Images

Despite being cleared of any serious injury, Lynch is likely to miss Adelaide's next NAB Challenge assignment against Geelong on March 12.

Ziebell was cleared by the AFL match review panel today after it ruled the high contact was caused by circumstances outside of his control.

Richmond utility Steven Morris was also cleared by the MRP while Kangaroo Lindsay Thomas was fined $1000 for rough conduct.

Tom Lynch being stretchered from the Gabba. Picture: Getty Source: Getty Images

Under strict AFL rules against ducking, umpires are told to call play on where a player ducks into a tackle and is the cause of high contact.

If the player is then tackled he will have to dispose of the ball properly to not be penalised.

Lynch was floored in Round 20 last year, charging headfirst into Brisbane defender Justin Clarke.

Lynch was initially diagnosed with concussion, but pain in his arms prompted further scans including an MRI which revealed "minor" fractures in the C7 and T1 vertebrae.

Lynch was forced to wear a neck brace for six weeks.

Tom Lynch helped from the ground after colliding with Demons Alex Georgiou and Jack Viney. Picture: Sarah Reed Source: News Corp Australia

Former Adelaide coach Brenton Sanderson defended Lynch at the time for being unfairly criticised for ducking.

"Don't forget against Melbourne (in Round 7) when he came out and lifted his head he got his jaw smashed in half,'' he said.

Lynch missed seven games with a broken jaw after being crunched by Jack Viney.

His latest mishap comes just weeks after Adelaide defender Brent Reilly was placed in intensive care with a fractured skull.

Reilly, 31, suffered several breaks to his skull after a teammate's knee struck him on the side of the head during a training drill.

Thankfully, Reilly is on the mend and returned to the club last week. His playing future remains up in the air.