In his book "The Joy of Living", Yongey Mingyer Rinpoche tells us how the billions of neurons in the
human brain are grouped by function into three different layers. First and
oldest is the brain stem or basil ganglia, the oldest and most primal "reptilian brain". It's
primary purpose is to regulate basic involuntary functions like breathing,
metabolism, heartbeat, and circulation. It also controls the fight or flight,
the "startle response". Under attack it unconsciously starts adrenaline coursing
through the body and causes rapid heartbeat and muscle tension. This part of us is also home to our dominance and aggression (power), territoriality, and sexual urges. This is why
reptiles tend to be combative rather than cooperative.
Adrenaline and other hormones
create extremely powerful emotional memories and patterns. Because these are so
powerful they can be triggered by events with even slight resemblance to the
original memory. This offers important survival benefits but can cloud or
distort perceptions of ordinary experiences. For example children who were
humiliated and criticized experience inappropriately strong feelings of fear,
resentment, and other emotions when dealing with authority figures later in
life. One significant element in a present situation similar to the past can
stimulate a whole range of thoughts, emotions, and hormonal and muscular
responses.
With the evolution of vertebrate mammals a startling development in the brain occurred. A
second layer of the brain evolved. This is referred as to the limbic region and
surrounds the brain stem like a helmet and includes a series of programmed
neural connections that stimulate the impulses of nurturing, providing food and
protection, cooperating and teaching essential survival skills through play and other means.
Mammals distinguish between the
sounds of their young and the types of sounds they make such as distress,
pleasure, hunger, and so on. In addition the limbic region can read the
intentions of others through posture, movements, facial expressions, the eyes,
and even subtle scents of pheromones. Mammals and birds adapt flexibly to changing
circumstances, laying the groundwork for learning and memory. The limbic system is the
emotional brain and is balanced by the third layer of the neocortex.
The neocortex is
specific to mammals and provides the capacity for reasoning, forming concepts,
planning, and fine-tuning emotional responses. It gives us the
capacity for imagination, creation, and for understanding and manipulating
symbols. It also gives us language, writing, mathematics, music, and art. It is also the
seat of rational activities such as problem-solving, analysis, judgment,
impulse control, the ability to organize information, learn from the past, and
empathize with others.
Every thought requires a series of complex interactions
among all of the layers of the brain. While a useful tool for understanding the functioning of the brain and the basis of our thoughts and behaviors, the three brains model has proven over the years to be less exact than originally thought. For example: birds brains have been found to have a neuron density that allows them to rival primates and humans in many ways.
Another very important aspect of the triune brain model is "limbic (mammal) resonance". This concept explores how we connect with each other on a vital energetic level. In the book "A General Theory of Love" it is detailed how we crave and need human touch in deeply profound ways as children.
If you look at the work of Dr.
Alan Watson's Complete Coherence, or the HeartMath Institute you find that when
we are stressed our cognitive ability takes a dive, and we go into fight,
flight, or freeze modes. We don't hear or see as well, and as Dr. Watson says,
it creates "A do it yourself lobotomy" as our "lizard brain" takes over and drives our thoughts, emotions, and behaviors.
The fact is this entity actually
does have many other "higher" capabilities, but many, perhaps most of
its functioning is primarily instinctual rather than rational. We react first,
and then reason it out as we reach for safety. Why is this awareness so vitally
important? Because it is so very easy for us to believe we have little or no
choice in stressful situations because we react so quickly and strongly.
Yes, we can "lose our
minds" at these times, but that is only the beginning of the
story. We do have choices and can train ourselves not to be quite so reactive.
In fact some "super meditators" that have thousands of hours of
training have overcome the startle response to an unexpected, sudden, loud
noise, a feat researches previously didn't believe possible.
Unfortunately, stress also
appears to cause us to skip over our nurturing, protective, and playful mammalian
brain as well. One part may remain active; the feeling part that leaves us
feeling trapped, alone, and frightened. This is a very important awareness
also, so that we may care for ourselves in hard and trying times with all the
loving kindness we can muster.
Through focus and concentration
on our inner and outer world, we can reach understanding, and through these
eventually wisdom and transformation. We can become masters of our fate, and
live from the inside out for perhaps the first time in our life. We find we
actually have many, many choices, and that the world is bountiful and beautiful
if we can see it, choose it, and live it. We can now know, life is
what you make it!
P.S. The Triune Brain model is very useful for seeing differences in parts of our brains and nature, but it is not an exact science, rather a simplification and approximation we can use to understand why people, mammals, and the "lower" life forms such as reptiles, fish, insects, and plants think and act as they do. Do plants, insects, reptiles, and fish think? That is a very interesting question we explore here.
Related Websites:
Don't Listen to your Lizard Brain.
Five Powerful Reptilian Brain Hacks to
Get More Control Over Your Life.
How Your Reptilian Brain Controls Your
Behavior.
How to Beat Your Lizard Brain.
Also a YouTube: Overpowering Your
Lizard Brain