article_snippet: George needs to be given an extended rest period to figure out if this is something that George has just not recovered from or whether there are genuine issues,' World Rugby concussion advisor Professor Willie Stewart said.
article_snippet: the contact during Northampton's win over Wasps is treated by medical staff before leaving the field on a stretcher .
article_snippet: his has been into the club for treatment and will continue to be monitored by the team throughout the weekend. '
article_snippet: England full back Mike Brown, rested for a month during the Six Nations after being knocked out against Italy on February 14, missed Harlequins' Wembley clash with Saracens after experiencing further concussion-related symptoms in recent days.
article_snippet: The North and Mike Brown cases have again raised questions over rugby's return-to-play protocols, which can permit concussed players to play again within six days if concussed players are shown to be symptom free.
article_snippet: In professional boxing, a sport with a concussion rate comparable to professional rugby's, any fighter who loses consciousness for less than a minute faces a mandatory 90 day stand down.
article_snippet: A loss of consciousness of more than a minute leads to an enforced 180 day rest period.
article_snippet: The winger played on that day but missed the next match as Wales medics were criticised for Wales medics decision .
highlights_snippet: World Rugby concussion advisor Professor Wille Stewart believes George North is in need of an extended rest period .