Why are we fainting?

All of a sudden, one is no longer master of his senses and any perception of the outside world disappears: the powerlessness (lat. Syncope) is a frightening state. There are a few typical situations in which people often faint. Thus, in very low blood pressure or shock states often synonymous fainting. But why does man ever faint? Which processes in the organism are responsible for this?

Disruption of cerebral blood flow as the cause of fainting

A short-term unconsciousness is called powerlessness, because at this time one is "without power" over his psychic and thereby also physical processes. The most common cause of fainting is a short-term one Disruption of cerebral circulation.

The brain is a sophisticated and complex system, which reacts immediately to the slightest irregularity. The body knows how to protect itself and is programmed to life-sustaining body functions to receive in emergency situations. Thus, he reduces his higher brain functions to maintain vital processes such as respiration and heartbeat.

Possible cause: malfunction of a nerve center

A brief disruption of cerebral blood flow can be caused by a malfunction of one of the nerve centers that control cardiac function and are located in the heart and heart arteries. There is also the Center of blood pressure regulation. Here, disorders result in a brief drop in blood pressure.

Other causes of powerlessness

The syncope (short-term unconsciousness or fainting) differs depending on the affected nerve center. One differentiates:

  • vagovasal syncope (unconsciousness occurs due to blood pressure and pulse drop)
  • Micturition syncope (unconsciousness occurs when urinating)
  • Hustensynkopen
  • orthostatic syncope (the unconsciousness occurs as soon as the affected person goes from the horizontal to the vertical) and
  • the Adam Stokes attack, in which our biological pacemaker in the heart briefly exposes.

At a clinical shock Fainting occurs as a result of loss of blood following injury, or as the blood vessels become slack and the venous return of the blood to the heart is suppressed.

For the medical cause of the fainting it is crucial to determine whether the fainting has followed a fall, for syncope, generalized seizures in epilepsy, but also hypoglycaemia in diabetes or brain pressure increases, as they can wrap up after bleeding in an accident is a fall typical.

Fainting and memory loss

The memory of the affected person is also affected by the temporary shutdown of brain functions. Memory loss (amnesia) depends on the period of unconsciousness. The longer you have been unconscious, the more likely there is a gap in memory that, in extreme cases, can extend to several days.

To prevent fainting

If you have the suspicion of becoming unconscious in a few seconds or minutes, you should get as close as possible put on the floor. This will help you avoid injury from falls. In addition, you should put your legs up so that the blood can flow back towards the brain.

Help with powerlessness

If you are present while another person becomes unconscious, you can best help her by putting her in the stable side position bring and control breathing and heart rate. Also, the high positioning of the feet can be helpful. An ambulance should be called if the person does not recover quickly or has an irregular pulse or breathing. In addition, the ambulance can also get to the root of the powerlessness.



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