What Is The Reptilian Brain: Parts And Functions

As we know, the brain has been constantly evolving for more than 250 million years and throughout this process it has acquired new functions and increasingly complex abilities. The oldest brain, to which the limbic and neocortex is he reptilian brain

This brain was identified and developed through MacLean’s triune brain theory. The reptilian brain Also known as R complex or reptilian complex, It is what we share with other mammals and reptiles. It is mainly responsible for launching our most basic and primitive functions, such as protecting us from possible threats, defending ourselves and fleeing to ensure our own survival. It is also responsible for carrying out some unconscious and involuntary behaviors such as our breathing, blood pressure, temperature, balance, among others. The reptilian brain or reptilian complex occupies approximately 5% of our total brain mass.

Characteristics of the reptilian brain

This type of brain it’s not reflective and on the contrary, he acts unconsciously and by instinct. As its main function is to be in charge of our own survival, it is considered that it is also responsible for making it difficult for us to achieve our personal goals since it feels safe only being in known terrain, however when it enters unknown terrain, it feels extremely threatened and prefers to flee and escape rather than face something new.

The reptilian brain is made up of the reticular system, the cerebellum, the basal ganglia, and the brain stem. Below we will briefly explain what each of these parts of the brain consists of:

• Basal ganglia: These are neuronal structures that are connected to each other and are located deep in the cerebral cortex. The main function of the nasal ganglia is to process information about our own body movement to adjust it to different situations and also carry out an appropriate act. For example, when we want to drive a car, we have to carry out certain actions and body movements to do it correctly. So it also helps us plan our actions to achieve some objective.
• reticular system: It is a set of neurons that are located in the brain, near the spinal cord. The main function of this system is to regulate the state of sleep and wakefulness. It is also in charge of filtering the information that comes through the senses, choosing those data that are of interest and putting aside those that are irrelevant, which ultimately do not reach consciousness.
• Cerebellum: It is one of the oldest parts of our brain and is located in the posterior fossa of the skull, as it is an extremely compact organ. The main function of the cerebellum is to maintain adequate balance and muscular coordination.
• Brain stem. It is located between what remains of the brain and the spinal cord. The brain stem, also called the brainstem, is made up of 4 different areas that are connected to the diencephalon. The main task of the brain stem is to serve as a circulation route for almost all sensory pathways, with the exception of olfactory and visual pathways.

Once we know what the reptilian brain and its parts are, it is important to know the functions of the reptilian brain

The reptilian brain fulfills different functions in our daily lives, below we are going to mention in more detail what they are exactly.

• Survival. As we have seen previously, the main function of the reptilian brain is to keep us protected from any threat that arises and also to ensure our survival. Although it is undoubtedly an essential and extremely important function, sometimes, if we do not know how to control it, it can prevent us from achieving our vital goals and objectives when facing new situations. This is because it perceives new situations as possible threats and prefers to stay in the “safe area.”
• Regulate basic vital functions. As we saw previously, it is responsible for the regulation of our basic functions such as breathing and cardiac functions.
• Avoid pain. It is responsible for seeking pleasure and all those sensations that are pleasant to the person.
• Territorial behavior. It is one of our own survival instincts that makes us tend to defend our home and also take care of the people closest to us and our belongings.
• Reproductive need. To ensure survival, the reptilian brain is responsible for activating our sexual instinct and motivation that causes us to be attracted to other people.

This article is merely informative, at PsychologyFor we do not have the power to make a diagnosis or recommend a treatment. We invite you to go to a psychologist to treat your particular case.

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