Marussia driver Jules Bianchi remains in a critical but stable condition in intensive care after suffering a diffuse axonal injury following a crash during the Japanese Grand Prix on Sunday.
The 25-year-old underwent surgery following the incident which saw him collide with a recovery vehicle at Suzuka which was clearing away Adrian Sutil's Sauber amid torrential conditions.
In a statement released on behalf of the Bianchi family, the extent of the injuries sustained by the French driver have been confirmed while further updates will be provided when available.
"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," the statement read. "We would like to express our sincere appreciation.
"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' 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.
"The hospital will continue to monitor and treat Jules and further medical updates will be provided when appropriate."
Diffuse axonal injury occurs in around half of severe head injuries and is regarded as one of the most devastating types of damage. Leading injury specialist BrainandSpinalCord.org says "severe diffuse axonal injury is one of the leading causes of death in people with traumatic brain injury".
Bianchi is expected to face sustained periods of rehabilitation once stabilised and fully awake, including physical therapy and counselling.