Epilepsy - psychoneurological a chronic disease characterized by a tendency to recurrent sudden seizures. Seizures are of various types, but the basis of any of them is very high and abnormal electrical activity of nerve cells of the brain, which occurs as a result of the discharge.
In this case there are three possible outcomes: 1) level may stop within the boundaries of its occurrence, and 2) it may spread to neighboring regions of the brain and cease to be resisted, and 3) it may spread to the entire nervous system and then stop. Seizures arising in the first two cases, referred to as partial, in the latter case, however, speak of generalized fit. In generalized seizures consciousness is always broken, whereas in the partial, it is sometimes lost and sometimes persists. To indicate the seizures are often also use the terms "convulsions," fits "," episodes ".
Epilepsy has been known since ancient times. Epileptic seizures were observed in many prominent people, such as the Apostle Paul and Buddha, Julius Caesar and Napoleon, Handel and Dante, Van Gogh and Nobel.
Prevalence of epilepsy
The true number of patients with epilepsy is difficult to ascertain because many patients are unaware of their disease or conceal it. In the U.S., according to recent studies, suffer from epilepsy for at least 4 million people, and its prevalence reaches 15-20 cases per 1000 people. In addition, approximately 50 out of 1000 children at least once celebrated a fit at higher temperatures. In other countries, these figures probably about the same as the incidence does not depend on gender, race, socio-economic status or place of residence. Radical treatment of epilepsy does not exist, but currently using of drugs can halt seizures in 60-80% of cases. The disease rarely causes death or serious violation of physical condition or mental abilities of the patient.
Epilepsy is classified by its origin and type of seizures. By origin distinguish two main types:
Approximately 50-75% of cases there is idiopathic epilepsy.
For diagnosis is very important electroencephalogram (EEG), which allows to identify the pathological brain electrical activity, and to determine the localization of the focus of this activity (epileptic focus) and the extent of its spread. However, not all patients with EEG is altered so that its normal pattern does not exclude epilepsy.
It is important to accurately establish the type of attack, as it affects the treatment. Some patients have seizures of different types, which requires a combination of medicines. Every man, suffered a seizure, should always consult a doctor.
Causes of epilepsy
Although seizures can occur in many diseases and, thus, may be associated with them, the true cause of epilepsy is unknown. Studies show that the disease occurs when a particular area of the brain damaged, but not completely destroyed. It affected, but preserved the viability of the cells are the source of abnormal discharges, and, consequently, the seizures. Sometimes during an attack, a new brain damage, near or far away from the old one. It formed additional epileptic foci.
It is still unknown why the same disease in one patient is accompanied by seizures, and another – no. Even more puzzling by the fact that some people who have had a fit, he will no longer be repeated, while others occur frequently repeated seizures. Importance is likely to have a genetic predisposition, but the type of inheritance is not clearly established. It seems that epilepsy causes a combination of hereditary and environmental factors, including an illness.
Types of seizures
Large (generalized) seizures. This type of seizures are traditionally mark the French term grand mal (that translates as a big attack). It is characterized by pronounced convulsions. Seizures are usually preceded by a prodromal period (the period of the precursors), lasts from several hours to several days. At this time there are irritability, irritability, loss of appetite or changes in behavior. Immediately before a seizure in some patients there is the aura – the state-precursor, whose manifestations range from repeated each time the nausea or muscle tremors to the feeling of inexpressible joy. At the beginning of a fit person may make grunting noises or cries. He loses consciousness, falls to the floor, his body tensed. Breathing slows down, the person becomes gray, bluish or pale.
Then there are jerks in the hands, legs or throughout the body. Pupils dilate, blood pressure rises, her face filled with blood, skin covered with sweat, his mouth salivate. Often there is an involuntary urine and feces. Возможен прикус языка или щек. Then the muscles relax, breathing becomes deeper, cramps subside. Consciousness returns through slumber. Drowsiness and confusion sometimes persist for days. Generalized seizures may occur in different ways: sometimes there is only one of the described phases, sometimes – another of their sequence.
Memories of generalized fit for it, sometimes the patient remembers only aura. Headache, confusion, pain, body pains and other symptoms may be associated with a fall during a seizure, a strong muscle spasms or bruises because of the involuntary movements. Seizures generally last from several seconds to several minutes and go spontaneously.
Febrile seizures are usually a type of generalized seizure and occur in children at high temperature, usually between the ages of 6 months to 4 years. Many of these children have relatives who suffered in childhood, such as seizures. Since in most cases there are one or two such episodes, which will no longer develop into true epilepsy, some experts do not consider febrile seizures to epilepsy.
Focal (partial) seizures. They involved a sort of one part of the body, seizures may be motor or sensory and manifest convulsions, paralysis or pathological sensations. The term "Jacksonian epilepsy" refers to seizures, a tendency to move ( "march") from one body part to another, sometimes in a fit generalizes and extends to the whole body. After a seizure in her limbs to a day may be retained weakness (paresis). The appearance of the aura, loss of consciousness and drowsiness after a fit is not always observed. With this type of seizure often, especially in adults, identify organic brain disease, so patients should as soon as possible to seek medical help.
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