Sexton will miss this weekend's Rainbow Cup game against Connacht.
It’s almost a month since Sexton suffered his latest blow to the head in the Heineken Champions Cup quarter-final win over Exeter.
Meanwhile, Rhys Ruddock has been ruled out for up to six weeks with a calf injury.
Ulster will be without John Cooney and Robert Baloucoune for Friday’s Rainbow Cup meeting with Munster.
Both players are observing the return-to-play protocols having suffered concussions in the Challenge Cup defeat to Leicester.
Meanwhile, Munster confirmed today that RG Snyman requires a procedure on his knee.
The South African lock suffered a setback in his return from an ACL injury.
Snyman hasn’t played since sustaining the injury in his debut match in August.

F1 Could Crown Youngest Formula One World Champion In Antonelli In A Fortnight
Golfers Will Be Banned From The DP World Tour Next Season If They Join LIV Golf
Grant Forrest Books Spot At The Masters And The Open At Open de España
Sonay Kartal Returns From Injury To Beat Anhelina Kalinina In Wuhan Open
Monday Morning Sports Update
Wolfe Tones Claim Kildare Junior Hurling Championship Title
Ulster Fight Back To Secure Dramatic Draw Against Munster
Shane Lowry Seven Shots Off Lead Ahead Of Spanish Open Final Round