Genesis is a term for origin, birth, education, origin, and so on. Most often, genesis is used as part of a compound word. Examples: anthropogenesis, sociogenesis, polygenesis, technogenesis, conflictogenesis, etc. In such complex words, the first part of the word denotes the phenomenon whose occurrence is spoken of.
Genesis in biology
Genesis is a multidisciplinary term that is used in sciences related to biology and not only. This word is especially popular in medicine, where the term "pathogenesis" is often used. One of the main terms of biology - phylogenesis and ontogenesis - means the path of development of organisms.
Phylogenesis
Phylogenesis or phylogeny - the development of all types of living organisms in the entire history of the planet. Phylogeny considers all stages of evolution, but it cannot completely cover life on Earth, since we know a small part of the species that lived earlier and exist on Earth now.
Ontogenesis
Ontogenesis, in contrast to phylogenesis, describes the stages of the individual development of each organism, starting from the moment of fertilization or separation (with asexual reproduction) and ending with death.
Genesis in medicine
In medicine, genesis is a term that characterizes a disease by the factors due to which it arose. Usually, doctors use the word pathogenesis to describe diseases. Pathogenesis, together with etiology, makes up the complete picture of the onset of the disease and its further development. Genesis analysis is very important for medicine - it gives an understanding of the behavior of the studied disease. You can consider the pathogenesis of the example of brain diseases that occur due to disruption of its vessels.
Vascular Genesis
In this article we will consider brain diseases that arise due to damage to its vessels and impaired blood flow to its individual parts. Diseases of the cerebral vessels can be divided into several types.
Transistor circulatory failure
In this case, the whole brain can be damaged, and only foci of damage can be observed. If changes affect the entire brain, a person experiences constant headache, nausea and vomiting. When vessels are affected only in some parts of the brain, the patient may lose the ability to perform movements in certain parts of his body for some time, and sensitivity in certain places disappears. Transistor malfunction nowadays is well treated without consequences.
Cerebral atherosclerosis
With this disease of vascular origin , the brain's nutrition with oxygen deteriorates. The vessels are narrowed - and the blood cannot bring enough nutrition to all the brain cells. The treatment of blockage of blood vessels and arteries often takes place operatively.
Aneurysm
With an aneurysm, a bulge filled with blood appears on the vessel. In certain cases, the aneurysm may burst, causing a brain hemorrhage. Then the blood enters the cerebrospinal space (subarachnoid region). This type of hemorrhage can lead to stroke and death.
Ischemic stroke
Ischemic stroke is also called cerebral infarction. It differs from other types of strokes in that it causes circulatory disturbance and brain cell death. The main reason for the occurrence of this ailment is a blockage by thrombi of arteries leading to the brain. If there is a suspicion of an ischemic stroke in a person, it is necessary to hospitalize him immediately.
Encephalopathy
The genesis of encephalopathy can be of several types:
1. Angioencephalopathy
2. Encephalopathy due to hypoxia
3. Toxic encephalopathy
4. Post-traumatic encephalopathy
5. Radiation encephalopathy
6. Toxic-metabolic encephalopathy
Encephalopathy is not considered an independent disease. More often this is called the defeat and death of brain tissue, which receives little oxygen. In general, encephalopathy can be not only of hypoxic origin. This must be taken into account. Although the most common is hypoxic encephalopathy. It happens asphyxiation, perinatal and postresuscitative.
What other genesis is encephalopathy?
When they cannot determine the causes of the occurrence of encephalopathy, or when it has several causes, they say that it is an encephalopathy of complex origin. Usually this type of encephalopathy immediately appears in the second stage of the disease. There are three stages of encephalopathy. Usually, patients do not pay attention to the symptoms of the first stage, going to the doctor only in the second or later, which greatly complicates the treatment and rehabilitation. Most often, mixed encephalopathy occurs on the basis of a discirculatory form of the disease.
Stage of discirculatory encephalopathy
- Compensatory stage. This phase is called so, because the patient’s body is still strong enough to compensate for disturbances in the brain. It is manifested by the instability of emotions and behavior, it may hurt and become dizzy. At this stage, 70 percent of patients feel only mild malaise and do not go to the doctors.
- The second stage of encephalopathy is called subcompensated. During this phase, the foci of the genesis of vascular disease acquire an irreversible form and are difficult to treat. Symptoms: tinnitus, apathy, lethargy, impaired vision, memory, impaired ability to move independently.
- The third stage is decompensated. The body does not have enough strength to fight it, and the important structures of the brain are irreversibly destroyed. Characteristic epileptic symptoms, memory loss, mental disorders are added, fainting and coma are possible.