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A young Christian boy has an out-of-body experience and 'sees Jesus.' The important thing is that he can describe things he 'saw' while outside his body, which cannot be explained any other way.
Near Death Experiences (NDE)
In my work as a neurologist I have primarily treated epilepsy. And as a hospital staff physician I see post-cardiac resuscitation patients in consultation. I have interviewed patients and studied their NDEs. The background is three possible precipitants, blunt or penetrating head trauma, decreased blood flow and/or low pO2 in the brain (Hypoxaemia), and temporal lobe epilepsy (partial complex seizures.)
NDE experiences are largely stereotyped no matter which of the above is the cause. The person is observationally unconscious or in a confusion like state. In the remembered event the patient often perceives an out of body experience (OOBE) which has two forms. One is standing next to one’s own body or more often floating above their body, seeming to see people around the bedside such as nurses and doctors. The other is a feeling of limitlessness, expanding and merging with the universe. The OBE is followed by going through a bright tunnel in a dark background. In this phase one might see images of dead relatives, angels, Jesus, or Brahma, or saints. This is followed by a smaller but brighter light. Usually at that point they either come out of it or come out of it (sometimes in reverse.) During the tunnel phase they may hear the voice of a dead parent or God/Jesus/Virgin Mary/Muhammad/Brahma.
On recovery, the patients often feel disappointed, cheated out of Heaven or bliss. They do have often have permanent or transient neurobehavioural changes mainly in short term memory, attention span, and emotional regulation with loss of some inhibition, loss of rational skills, loss of some problem solving efficiency, and changes in efficiency of task specific shifts. Depending on the degree of hypoxia or hypoxaemia, the post-episode impairment varies.
NDE’s are only sometimes near (risk of) death. Many occur with cardiac arrests which indeed are life threatening. In such a case, there is a marked decrease or stop in blood flow to the brain temporarily in “watershed regions.” Watershed areas are the tissue between two different arterial trees and perfusion there is more tenuous. During shock or cardiac arrest blood perfusion to the border zone between the territories of two arteries decreases.
Arteries branch into more and smaller arteries and arterioles. At the peripheral end of an arterial “tree”, the capillaries merge with those of the neighbouring artery producing the Watershed Area. When blood flow decreases, the area getting the worst deprivation is this watershed area. It is the area suffering any neuronal loss (there is likely always some neuronal loss, varying with the severity of hypoxaemia).
Watershed areas are found all over the body. However, in the inferior medial temporal lobes are arteries named the posterior cerebral and middle cerebral. The sudden hypoxaemia can precipitate temporal lobe like seizures. This Temporal Lobe watershed is the anatomical focus of the Near Death Experience.
Other watershed areas are in the upper parasagittal areas of frontal lobe (rational, inhibitory, analytical), calcarine occipital lobe (visual), and cerebellar (balance, coordination (arteries are Superior Cerebellar, Anterior Inferior Cerebellar, and Posterior Inferior Cerebellar.)
Temporal lobe seizures are epileptic discharges that begin in the mesial inferior temporal lobe spreading to the amygdala and on to multiple cortical association areas generating the event. They can also occur in pure brain hypoxia, in hypoxaemia (deoxygenated blood and poor flow or shock) and in deoxygenated but normal volume blood perfusion.
Complex Partial Epilepsy can and generally is non-hypoxic and non-ischemic. In Epileptics, they have many causes. Some are due to temporal sclerosis (scarring), head trauma, brain tumours, arterio-venous malformations, small haemorrhages, small infarcts/strokes, metabolic imbalances (↓Na+, Renal Failure, ↓Mg++, ↓ or ↑Ca++, ↓blood osmolality, and ↓pH.) They can also occur from a number of different drugs such as cocaine, methamphetamines or drug/alcohol withdrawal.
The electrical discharge begins in the neurons in the region of Ammon’s Horn in the temporal lobe. The discharge is transmitted to memory association areas of the nearby temporal lobe for visual and auditory memories and odd smell memories. Some go to the superior parietal lobe (body orientation/localization areas) to give the primary OOBE (Out of body experience) phase.
In this situation discharges have an inhibitory effect. Some go to cingulate gyrus as well for the affective component (happiness, mystical, frightened, or angry.) In some cases frontal lobe discharges are recorded.
Amergin