Decerebrate posture is an abnormal body posture that involves the arms and legs being held straight out, the toes being pointed downward, and the head and neck being arched backwards. The muscles are tightened and held rigidly. This type of posturing usually means there has been severe damage to the brain.
A severe injury to the brain is the usual cause of decerebrate posture.
Opisthotonos (a severe muscle spasm of the neck and back) may occur in severe cases of decerebrate posture.
Decerebrate posture can occur on one side, on both sides, or in just the arms. It may alternate with decorticate posture. A person can also have decorticate posture on one side of the body and decerebrate posture on the other side.
Conditions related to decerebrate posture need to be treated right away in a hospital.
Abnormal posturing of any kind usually occurs with a reduced level of alertness. Anyone who has an abnormal posture should be examined right away by a health care provider.
The person may need emergency treatment right away. This includes breathing assistance and placement of a breathing tube. The person will likely be admitted to the hospital and placed in intensive care.
Once the person is stable, the health care provider will do a more complete physical exam, including a brain and nervous system assessment.
Family members will be asked questions about the person's medical history, including:
Tests may include:
The outlook depends on the cause. There may be brain and nervous system injury and permanent brain damage, which can lead to:
Mayer SA, Badjatia N. Head injury. In: Wolfson AB, Hendey GW, Ling LJ, et al, eds. Harwood-Nuss' Clinical Practice of Emergency Medicine. 5th ed. Philadelphia, Pa: Lippincott Williams & Wilkins; 2009:chap 70.