Joan Lascorz suffered damage to his spine in a testing crash at Imola, the Kawasaki Racing Team earlier this week.
The Spaniard, who finished in the points in both of Sunday's races at the Italian circuit, crashed during a post-race test session on the uphill section from Tosa to Piratella on Monday and was initially diagnosed with probable fractured vertebrae.
Lascorz reportedly impacted heavily with a crash barrier and received medical assistance at the trackside before being transported to the circuit's medical centre.
The 27-year-old was later air-lifted to the spinal injury unit at Maggiore Hospital in Bologna, where he underwent surgery.
"Yesterday at 23.30 the surgery to put the vertebra into the right place was successfully finished, due to the impact the vertebra was moved, partly damaging the spine," a Kawasaki statement read on Monday
Further tests are to be carried out to evaluate the extent of the spinal damage.
"The medical service of the Hospital Maggiore di Bologna and the medical team that will take care of Joan in Barcelona are in contact to manage his transportation as soon as possible," the statement read.
"The Spanish motorbike federation is already managing the logistics and operations in order to be ready when doctors decide to proceed with transportation."
After the initial treatment at the Maggiore Hospital in Italy, where his vertebra was relocated, after which he was flown to his home country of Spain for further treatment.
The first press release issued by the team since he arrived in Spain says that he is "now continuing his recovery in Spain, at the Valle Hebron hospital in Barcelona. He is undergoing further checks and treatment for the injuries he suffered to his C6 vertebra."
The swelling around the affected area continues to prevent doctors from making a diagnosis about the extent of his neurological injuries. Once the swelling subsides, a more accurate long term prognosis can be made.
Given the extent of his injuries, it's highly unlikely he'll be able to take part in the next round of the championship on the weekend of April 20-22 in Assen, Holland.