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Decerebrate posturing indicates brain stem damage, specifically damage below the level of the red nucleus (e.g. mid-collicular lesion). It is exhibited by people with lesions or compression in the midbrain and lesions in the cerebellum. [7] Decerebrate posturing is commonly seen in pontine strokes.
The phenomenon has been observed to occur several minutes after the removal of medical ventilators used to pump air in and out of brain-dead patients. [4] It also occurs during testing for apnea—that is, suspension of external breathing and motion of the lung muscles—which is one of the criteria for determining brain death used for example by the American Academy of Neurology.
Opisthotonus is also described as a potential CNS symptom of heat stroke along with bizarre behavior, hallucinations, decerebrate rigidity, oculogyric crisis, and cerebellar dysfunction. [citation needed] Opisthotonus is a symptom of "lavender foal syndrome", a lethal genetic disorder in horses. [4]
The rupture of these vessels leads to linear or flamed shaped hemorrhages. The disrupted brainstem can lead to decorticate posture, respiratory center depression and death. Other possibilities resulting from brain stem distortion include lethargy, slow heart rate, and pupil dilation. [9] Uncal herniation may advance to central herniation. [7]
The brain doesn’t shut off like a light switch, even as death approaches. While other bodily organs—namely the heart and lungs—have sudden stops, the brain flickers on through active neurons ...
Brain death is used as an indicator of legal death in many jurisdictions, [6] but it is defined inconsistently and often confused by the public. [7] Various parts of the brain may keep functioning when others do not anymore, and the term "brain death" has been used to refer to various combinations.
A new study recorded brain waves while dying people were resuscitated to see what happens during the out-of-body experiences they later describe. Near-death experiences tied to brain activity ...
Coma, decerebrate posturing; It gives an index of the mortality associated with the various grades. The mortality is minimum with grade 1 and maximum with grade 5.