What is perirhinal bark?

Perirhinal cortex is an area in the brain of mammals, which lies adjacent to the hippocamp, lined on one side of the entorhinal bark and on the other side of the parahippocampal bark. It is located in the middle time lobe and is commonly associated with memory and recognition. For anatomists that define areas in the brain according to the Brodmann areas, the region covers the Brodmann region 35 and 36. For example, for primates, they will receive a lot of visual information, but in rodents, information is obtained by the same area is largely olfactory and auditory. Primates relies more on vision of sensory and environmental information, while rodents rely more on the smell and hearing. This shift in the input conditions is due to the fact that some sensory systems predominate others and how this imbalance is likely to affect how the subject remembers.

While the perirhinal bark receives infinOrmation from all cortical sensory areas, it is also remarkable that this part of the brain also receives information that has been processed in advance. Soon in the cortical sensory areas in the brain, the perimeters of lateral inhibition cleans incoming information signals, strengthen repeated, reliable information and weaken shooting patterns that many scientists consider to be "noise". All sensory areas in the brain have some form of information in the early stage of the neural signal processing.

perirhinal bark sends thalamus projection, which acts as an information center, other routing signals to other parts of the brain. Amygdala, which is associated with the excitement and reaction of fear, is another area of ​​the brain that receives projections from perirhinal cortex. This is intuitive to neuroanatomistys, because it is known that memory processing is more effective with increasing response to adrenaline and excitement. Perirhinal bark also has mutual and direct jointswith some cells in the CA1 hippocamp.

There are different types of memory processing, and scientists teased the role of perirrinal cortex from the role of hippocamp and other brain areas associated with memory, coding and searching. Perirhinal bark is involved in visual perception and identification of the environment. It is also considered an area associated with sentimentality, such as suction of objects with emotional significance. While hippocampus is more associated with memory, perirhinal cortex is more associated with acquaintance and feeling of recognition than explicit memory search, although both structures are active during the memory and learning process.