agnosia

The term agnosia that we are now going to address has its etymological origin in Greek. Specifically, we can determine that it also derives from the word "agnosia", which can be translated as "inability to recognize." It is made up of the sum of three clearly differentiated parts:
-The prefix “a-”, which is equivalent to “sin”.
-The noun “gnosis”, which is synonymous with “knowledge”.
-The suffix “-ia”, which can be translated as “quality”.

The concept is used in the field of medicine to refer to a perception disorder that leads a subject to not recognizing individuals, items, or situations that were previously familiar to you.

One who suffers from agnosia, in this way, becomes incapable of recognizing certain stimuli that I had already learned. The disorder can also cause the inability to learn other stimuli.

It is important to mention that agnosia is not due to a problem in the senses, such as loss of sight. The person he continues to see without problems, although he cannot register or understand what he is observing.

It is determined that all agnosia, regardless of the type, is characterized by having these hallmarks:
-There is a clear inability to recognize stimuli received through what are different sensory channels.
-In the first bars, it may happen that the person does not quite realize that they have a problem. And it is that its symptoms can be considered to be a simple mistake or an oversight.
-The patient who suffers it will have complaints about other people, about his environment, because of his way of behaving in a "strange" way.

It is possible to differentiate between different types of agnosia. The example mentioned lines above corresponds to the visual agnosia: the subject sees, but does not interpret. This alteration is usually generated from damage to the temporal lobe or the occipital lobe.

Within visual agnosia there are several different types such as these:
-Agnosia for colors, which causes the person in question to not be able to identify and differentiate them.
-Prosoagnosia, which is the agnosia that affects, above all, what is the perception of faces. In the most serious cases, the sufferer may not even recognize himself in front of the mirror or his loved ones.

The auditory agnosia, for its part, occurs when the person fails to interpret the sounds. Similar to visual agnosia, the affected person can hear without problems: the disadvantage lies in the processing of the meaning of the sound in question.

The body agnosia constitute a group of alterations that imply that the subject is unable to recognize or identify part or all of their Body. Other kinds of agnosias are motor agnosias (trouble remembering a movement pattern) and tactile agnosia (difficulties in recognizing what is touched), among others.