The family of Jules Bianchi have confirmed that the Marussia Formula 1 driver has suffered a diffuse axonal injury.

The 25-year-old, who is in a critical but stable condition, has been receiving treatment at the Medical Center in Yokkaichi ever since his car collided with a recovery vehicle during Sunday's Japanese Grand Prix.

Speaking for the first time since the accident via a statement, Bianchi's relatives thanked those that have offered them support during this "very difficult time".

"This is a very difficult time for our family, but the messages of support and affection for Jules from all over the world have been a source of great comfort to us. We would like to express our sincere appreciation," it read.

"Jules remains in the Intensive Care Unit of the Mie General Medical Center in Yokkaichi. He has suffered a diffuse axonal injury and is in a critical but stable condition. The medical professionals at the hospital are providing the very best treatment and care and we are grateful for everything they have done for Jules since his accident.

"We are also grateful for the presence of Professor Gerard Saillant, President of the FIA Medical Commission, and Professor Alessandro Frati, Neurosurgeon of the University of Rome La Sapienza, who has travelled to Japan at the request of Scuderia Ferrari.

"They arrived at the hospital today and met with the medical personnel responsible for Jules's treatment, in order to be fully informed of his clinical status so that they are able to advise the family. Professors Saillant and Frati acknowledge the excellent care being provided by the Mie General Medical Center and would like to thank their Japanese colleagues."

According to brainandspinalcord.org, "about 90% of survivors with severe diffuse axonal injury remain unconscious. The 10% that regain consciousness are often severely impaired".