Formula 1 driver Jules Bianchi has suffered "a diffuse axonal injury and is in a critical but stable condition", read a statement from the racer's family Tuesday.
The Frenchman went off the Suzuka Circuit in Sunday's Japanese Grand Prix and hit the tractor which was recovering Adrian Sutil's Sauber in rain-soaked conditions. The driver was breathing but was unconscious while he was taken out of his car.
"Jules remains in the Intensive Care Unit (ICU) of the Mie General Medical Center here. He has suffered a diffuse axonal injury (DAI) 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," said a joint statement issued by the Bianchi family and the hospital.
"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."
DAI is one of the most common types of traumatic brain injury, meaning that damage occurs over a more widespread area than in focal brain injury. DAI is one of the major causes of unconsciousness and persistent vegetative state after head trauma.
The statement further added: "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."