What causes loss of consciousness

These include the reticular, pontine.The definitive causes of altered consciousness are not known.Blacking out, fainting, or loss of consciousness getting started.Fainting, also called passing out or syncope, is a temporary loss of consciousness.Low blood pressure 1.7 7.

Transcient loss of common in young people spe.Several plausible hypothetical mechanisms have been proposed for the alteration of consciousness that occurs with mtbi.The two main reasons for blacking out are insufficient blood flow to the brain and abnormal electrical activity within the brain (a seizure).Dizziness after standing up in an older person suggests postural hypotension.Unconsciousness lasting longer than 30 minutes is thought to indicate a more serious form of brain injury than concussion.

From decades of animal experiments and human experience with traumatic brain injury, we know that concussion commonly occurs without loc.While both of these sound scary, in reality most episodes of blacking out are not related to life threatening health problems.Synonymous with transient loss of consciousness.Overuse injury a loss of consciousness is an example of:Standing in a position for too long 1.2 2.

Fainting neurogenic and other nature epilepsy intracerebral hemorrhage subarachnoid hemorrhage basilar artery thrombosis traumatic brain injury metabolic disorders (most commonly hypoglycemia and uremia) exogenous intoxication (often develops subacute) psychogenic rest faintingWhen a child loses consciousness, you need to take the situation very seriously.Loss of consciousness requires either loss of the function of both cerebral hemispheres or of the reticular activating system.This temporary reduction in the blood supply in the brain can be caused by heart diseases and, more commonly, due to other conditions that do not directly involve the heart.It usually happens when there is a slight decrease in the amount of oxygen reaching the brain.