Ireland will be without Johnny Sexton for Sunday's visit of France in the Six Nations after their captain suffered a blow to the head against Wales. 

Sexton underwent return-to-play protocols after the incident in the loss but has not been cleared to play. 

The news comes after Sexton hit out at a French doctor who claimed the fly-half had suffered approximately 30 concussions in his career, with neurologist Dr Jean-Francois Chermann subsequently apologising. 

Billy Burns will start instead for Andy Farrell's side, who lost 21-16 in Cardiff, with Jamison Gibson-Park also in the XV as scrum-half Conor Murray sits it out with a hamstring injury. 

The captain's armband goes to Iain Henderson for the first time, with the suspended Peter O'Mahony replaced by Rhys Ruddock following his red card in the Welsh capital. 

James Ryan also sustained a blow to the head in that game and, like Sexton, will be absent this weekend.

Ireland: Hugo Keenan; Keith Earls, Garry Ringrose, Robbie Henshaw, James Lowe; Billy Burns, Jamison Gibson-Park; Cian Healy, Rob Herring, Andrew Porter; Tadhg Beirne, Iain Henderson; Rhys Ruddock, Josh Van der Flier, CJ Stander.

Replacements: Ronan Kelleher, Ed Byrne, Tadhg Furlong, Ultan Dillane, Will Connors, Craig Casey, Ross Byrne, Jordan Larmour.