Webb Therapy Uncategorized The ‘Triune Brain’ theory by Neuroscientist Paul MacLean — an evolutionary perspective

The ‘Triune Brain’ theory by Neuroscientist Paul MacLean — an evolutionary perspective

The Concept of the "Triune Brain"

In the 1960s, American neuroscientist Paul MacLean formulated the ‘Triune Brain’ model, which is based on the division of the human brain into three distinct regions. MacLean’s model suggests the human brain is organized into a hierarchy, which itself is based on an evolutionary view of brain development. The three regions are as follows:

  1. Reptilian or Primal Brain (Basal Ganglia)
  2. Paleomammalian or Emotional Brain (Limbic System)
  3. Neomammalian or Rational Brain (Neocortex)

At the most basic level, the brainstem (Primal Brain) helps us identify familiar and unfamiliar things. Familiar things are usually seen as safe and preferable, while unfamiliar things are treated with suspicion until we have assessed them and the context in which they appear. For this reason, designers, advertisers, and anyone else involved in selling products tend to use familiarity as a means of evoking pleasant emotions.

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Sigmund Freud’s classic Defence Mechanism’sSigmund Freud’s classic Defence Mechanism’s

Projection: Attributing one’s unacceptable feelings or desires to someone else. For example, if a bully constantly ridicules a peer about insecurities, the bully might be projecting his own struggle with self-esteem onto the other person.

Denial: Refusing to recognize or acknowledge real facts or experiences that would lead to anxiety. For instance, someone with substance use disorder might not be able to clearly see his problem.

Repression: Blocking difficult thoughts from entering into consciousness, such as a trauma survivor shutting out a tragic experience.

Regression: Reverting to the behaviour or emotions of an earlier developmental stage.

Rationalization: Justifying a mistake or problematic feeling with seemingly logical reasons or explanations.

Displacement: Redirecting an emotional reaction from the rightful recipient to another person altogether. For example, if a manager screams at an employee, the employee doesn’t scream back—but the employee may yell at her partner later that night.

Reaction Formation: Behaving or expressing the opposite of one’s true feelings. For instance, a man who feels insecure about his masculinity might act overly aggressive.

Sublimation: Channelling sexual or unacceptable urges into a productive outlet, such as work or a hobby.

Intellectualization: Focusing on the intellectual rather than emotional consequences of a situation. For example, if a roommate unexpectedly moved out, the other person might conduct a detailed financial analysis rather than discussing their hurt feelings.

Compartmentalization: Separating components of one’s life into different categories to prevent conflicting emotions.

Emotions: Function and MotivationEmotions: Function and Motivation

Joy or happiness can motivate us to join in, take part, flourish, share, be a part of, repeat these activities.

Fear can motivate us to get away, hide, flee, run, keep ourselves or others safe. It protects us.

Sadness can motivate us to withdraw, ruminate, cry, heal, express hurt, seek comfort and bond with others.

Anger can motivate us to attack, defend or stand up for ourselves, identify boundary violation, identify there is a threat to our self or our loved ones or something we value.

Guilt can motivate us to repair what we have done and informs us that we have violated our morals or values.

Shame can motivate us to hide away, to keep things secret, to remember our fallibility and humility, to keep us “right sized”.

Disgust can motivate us to withdraw, keep a distance, get clean or clean our environment to ensure we stay healthy.

Compassion, empathy, or sympathy can motivate us to offer comfort, be with others, relate to one another and form strong bonds.

Confusion (Cognitive with physical sensations) can motivate us to get curious, learn, discover, grow.

Affection (behavioural with physical sensations) can motivate us to give love, get close to specific people who were feel safe with, and want to spend more time with.

Sapiens: A Brief History of Humankind.Sapiens: A Brief History of Humankind.

Human-Kind. Isn’t that lovely. We have moved away from the patriarchal term mankind – ‘man’ who has not always been ‘kind’, necessarily – toward equality between the sexes and acknowledging gender fluidity. Noah touches on this. If you’re interested in the evolution of humanity and how we are capable of co-operating as a global community, give this book a go. You may experience information overload – but when condensing 2.4 million years into less than 500 pages, Harari goes alright. I’m someone who didn’t pay attention to history at school so I found this book enlightening, empowering and also disheartening at times. Harari writes about the breakthroughs of the Cognitive, Agricultural and Scientific Revolutions. The power of human imagination, math and language has been instrumental in the development of humankind into an apex predator, and the destruction of everything else.