Francheska Camilo González
English Version: March 6, 2014

Brain Death
Consciousness is a knowledge in which human beings are alert to the sensations, feelings and thoughts experimented in a particular time, in order to show the reactions that arising by the events experienced by a person. The loss of the consciousness can be caused for a trauma to the central nervous system (CNS), poisoning, metabolic disorders and neurological disorders. The loss of awareness results in a decrease or the elimination of certain acts of reflex, causing the individual reacts only to a limited number of stimuli in their environment.

Brain death is defined by the irreversible culmination of all intracranial structural and neurological function in the hemispheres of the brain and brainstem. A brain injury causes the loss of the regulating mechanism that the brain produces on other organs and components of an individual's consciousness. Thus, a person with brain death will not have the functions that allow to open the eyes, talk, feel sensations, respond to stimuli, among others.

Neurologists are professional of neuroscience. According to these neuroscience professionals, the initial brain death occurs in the cerebral cortex and spreads affecting to the whole brain and the individual's body. The neurologist is responsible for determining when the brain injury reaches an irreversible level, and this is determinate by a positive apnea test and other evidence indicating the absence of all brain stem reflexes. Many of these neurologists refuse to declare brain death when an individual's heart continues to beat, because that there are cases where patients have awakened from a state of brain death, leaving the interrogative in neuroscience professionals about the irreversible level in the process or loss of consciousness due to brain death.

The brain death occurs mostly in individuals who have a destruction of brain tissue caused by a head injury that occurs in an accident. These people are diagnosed with brain death, because they have lost the total of mechanisms of consciousness which allow being alert to sensations, feelings and thoughts that show reflexes in response or reaction to these. A significant controversy over the diagnosis of brain death worldwide is that some think that this could be diagnosed for organ procurement in these patients and by this way to help other people with other diseases. Also in investigations it was found that the neuronal stem cells from individuals alive or dead (with brain death) and embryonic can be used to treat a number of diseases where which includes restoring the memory of persons who have suffered certain types Damage in the brain. These are some of the reasons why many neurologists do not confirm the state of brain death in patients up to the time that the heart stops beating.


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