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How does the mind work? The wondrous capabilities of the mind pivot around its dazzling method for exchanging signals between its alert neural organs. That method enables over 100 billion neurons, assembled in these organs, to use vast inherited and acquired memories for survival. Together, those organs are able to perceive the world, understand it and carry us through life. Our conscious experiences open but a small window into their achievements.
The process begins, when a few neural organs convert sound, light, taste, smell and touch into biochemical and electrical signals. Other judicious organs categorize these signals as objects and events. Still more respond to recognized events with the emotional signals, which control our motor systems. We have little awareness of the massive interchange of these signals. But, a few of them mysteriously provide us our conscious view of our perceptions and actions.
The neural organs store millions of years of wisdom. As an example, there are unique receptors in the olfactory bulb, which signal the recognition of toxic molecules in the air. Evolution granted the neurons in the bulb an amazing memory for those combinations (Nobel Prize, 2004) of its receptor signals, which signify life threatening odors. If the bulb identifies a foul smell, similar memories in other neural organs make us respond with a disgust related response. We feel disgust and become conscious of our impulsive withdrawal from the spoiled food. Like the images on a computer monitor, a few such glimpses of complex internal signals cascade through our consciousness.
How
Does The Mind Work?
What Are The Early Beginnings Of The Nervous System?
The
mind senses and responds to patterns, using a neural mechanism, which
originated in the early animals. Before the arrival of animals, only
multicellular organisms existed in the primeval waters on earth. They
moved about and swallowed, or expelled food by contracting or
expanding their cells. Such expansion and contraction was achieved
through chemical signals, the forerunners of hormones. But such
chemical activity diffused too slowly over larger bodies of cells and
could not deliver targeted messages. A new nervous system solved
these problems.
How
Does The Mind Work?
What Are The Capabilities Of The Neuron?
The
electrically activated system had four powerful capabilities. First,
receptor cells could sense the touch of food, obstacles, or danger
and fire their signals. Second, electrical signals could trigger
expansion, or contraction of specific groups of motor cells. Third,
neurons could interpret receptor signals and dispatch focused signals
to trigger contraction, or expansion of specific parts of the cell
body. Fourth, such electrical signals could be sent across the longer
distances of a body of cells.
How
Does The Mind Work?
What Were The Earliest Neural Functions?
The
primitive Hydra, a branched tubular animal was controlled by such a
neural network. The network functioned between its outside and its
internal digestive cavity. Depending on where it sensed touch, the
net triggered contraction of an appropriate part of its tube or its
tentacles. Remembered combinations enabled the neurons to fire just
the right signals to make the animal move about, or push food
particles into its mouth. Strong contractions expelled indigestible
material through the same orifice. Even in a primitive animal,
phenomenal nerve cell memories enabled this nervous system to
perceive the world, interpret it and suitably control its body for
survival.
How
Does The Mind Work?
How Do The Receptors Work?
Compared
to the elementary touch sensitivity of the Hydra, the human mind
converts the multi-sensory perceptions of millions of isolated world
events into nerve signals. Typically, when an odorant molecule locks
on to an odor receptor, calcium channels in the membranes of the
nerves open and calcium ions pour inside, generating the electrical
charge of a nerve signal. Such signals are carried by peripheral
nerves to the central nervous system. Chemoreceptors in the tongue
report taste. Other receptors are massed together to form sense
organs such as the eye and the ear. Chemicals from damaged tissue
cause nociceptors to fire and report pain.
There
are more receptors, which fire signals to indicate recognition of
sharp pain, burning pain, cool or warm temperature, itching, muscle
contraction, muscle burn because of lactic acid, joint movements,
soft touch, mechanical stress, tickling, flushing, hunger and thirst!
The mind constantly monitors the internal and external environment
with its receptors, which are sensitive to a massive range of air and
liquid molecules, light patterns, sound waves and critical bodily
events.
How
Does The Mind Work?
What Is Event Recognition?
The
signals which monitor the environment are routed to the primary areas
of the cortex. Within milliseconds, the signals jump to the secondary
areas, which integrate the signal combinations from the other half of
the body. This integration handles binocular vision and stereophonic
sound. The combined signals travel to a complex set of neural organs,
which make sense of these signals. They identify objects and events.
Since the failure of any one of these organs causes a loss of a
particular ability of the mind, science has been able to identify the
functions of many of these organs.
The
somesthetic organ receives touch sensory signals. If this region is
damaged, a patient cannot feel the hardness of steel, or the softness
of velvet. The somesthetic association organ recognizes objects by
touch. If this organ alone is damaged, a patient can feel an object,
but will not know what it is. If blindfolded, she cannot identify a
pair of scissors held in her hand. When the speech association organ
is damaged, a patient knows the object, but is unable to name it.
These organs are powered by massive combinatorial nerve cell memories
of relationships between the senses and objects and events. Once
events are identified, the mind responds with motor actions.
How
Does The Mind Work?
What Does The Amygdala Do?
The
earliest mechanism acted to avoid pain. Nature had identified damage
to the body by generating pain signals. It also developed
the amygdala,
an organ, which could remember which sensory signals accompanied an
experience of pain. With its intensely sensitive response to sensory
signals related to pain experiences, the organ exists in fishes,
amphibians, reptiles, birds and mammals. The amygdala outputs
signals, which are interpreted as either fear, or anger
emotions. Emotions set
off attitudes and behaviors.
The
body responds to each emotion with a precisely focused pattern of
thought and behavior. On sensing danger, the amygdala sends fear
signals to the brainstem, triggering (typically jumpy) avoidance
behaviors. Fear signals raise blood pressure and heart beats. Fear,
anger, or disgust signals to the facial nerves generate appropriate
expressions. The amygdala is an early warning system, which triggers
your emotions faster than your conscious awareness. Beginning with a
simple response to fear, nature developed a wide range of emotional
signals, which generate behaviors to cope with most situations in
life.
How
Does The Mind Work?
What Is The Role Of The Insula?
Emotional
signals set off complex patterns of coping behaviors, built up over
millions of years. The amygdala triggered primitive attack, or
withdraw responses for reptiles. Life moved gradually on to the more
cooperative lives of herds. Groups of animals had better survival
chances. Nature developed the insula,
which triggers social emotions. The insula triggers the pain of guilt
and shame to discourage antisocial behaviors. Eisenberger's research
at UCLA reports neural pain circuits were found to be activated, when
a person suffers social rejection. The insula also triggers the
positive emotions of love, gratitude and compassion.
The
Insula also carries mirror
neurons,
which can sense the signs of stress in a neighbor, including facial
expressions, and can proceed to internally imitate those emotions.
For the whole herd, fear spread fear and relaxation brought calm. The
guilty became subdued and the compassionate assisted the weak.
Emotions triggered coping patterns of behavior. By sensing and
sharing the pain of their group, animals acted to protect each other
as well as the weak and the young.
How
Does The Mind Work?
What Is The Size Of Human Memory?
Human
survival is enabled by a massive assembly of knowledge in the body
and in the nervous system. Genetic codes decide the structure of a
fingernail, or an eyelash. The genetic DNA codes of a human being, if
tightly packed into 500 page books, will fill the Grand Canyon 50
times over with those books! A similarly unimaginable store of neural
combinatorial codes control the signals of neural
organs. Intuition works
by instantly inhibiting whole sections of the system, when it does
not recognize a received signal.
How
Does The Mind Work?
How Does Intuition Process Combinatorial Memories?
Typically,
combinatorial memories in the spinal cord smoothly orchestrate the
movement of 60,000 muscles, inhibiting opposing actions, sometimes up
to 10,000 times a second! This intuitive process enables each neural
organ to be independent, while the received impulses grant them
sensitivity to every other organ. With millions of dendritic inputs,
each neural organ can monitor the myriad dimensions of the mind.
Vision can have an impact on pain and despair, on blood
pressure.
How
Does The Mind Work?
How Does Intuition Work With Inhibition?
Inhibition
works to eliminate alternatives for every decision of the nervous
system. As someone said "When a tiger bounds towards you, what
should your response be? Should you file your toenails? Do a
cartwheel? Sing a song? Is this the moment to run an uncountable
number of randomly generated response possibilities through the
decision rule?" Animals cannot afford to freeze into immobility,
unable decide between chewing grass and drinking water. Intelligent
action, pivotal for survival, mandates a swift logic, which
ceaselessly narrows possibilities down to a single answer. Nature's
logic evaluates myriad known possibilities to choose one option for
action. If the choice is to chew grass, the drive to quench thirst is
instantly inhibited.
How
Does The Mind Work?
What Do The Prefrontal Regions Do?
The prefrontal regions (PFR) have access to the global wisdom of the mind. The signals fired in this organ grant you a multi-dimensioned view of life. Its combinatorial memories process the unemotional judgments of the mind. Unfortunately, the early warning systems in the amygdalae react to negative events before the prefrontal regions can truly assess a situation. While it takes around 300 milliseconds for the PFR to become aware of a disturbing event, the amygdalae react to it within 20 milliseconds!
The results cause you gut wrenching turmoil. Sadly, the knee-jerk responses of these emotion organs cause you to overreact to the world around you. Their momentary mischief in the morning can subconsciously trouble you the whole day. An awareness of the mechanism can enable you to effectively still their ill effects and recover your peace of mind.
How
Does The Mind Work?
What Is The Real I?
Just like your
visual experience of the sunset, the claustrum provides the current
real time view of the system to all relevant regions of your brain.
We call that view "consciousness." It is a subset of human
perception. Just the way it recognizes a living intelligence
in a barking dog, the brain recognizes an "I" as a real entity. The "I" has a
three dimensional view of the world, makes decisions and experiences
life. The brain locates this entity in an actual physical location, behind our eyes and in front of the back of our heads.
Even with eyes closed, the brain knows the positions of our arms and legs relative to such an "I." Muscles, tendons, joints, and the inner ear contain proprioceptors, (stretch receptors), that provide this information. The brain concludes that "I" is a physical entity with a mysterious perception of the world. An independent "I" in the brain is no more real than an "I" in a thermostat. Such an "I" is a confused mental construct.
How
Does The Mind Work?
How Does Attention Help?
Your brain has this instant ability to
switch your focus by inhibiting irrelevant neural activity. Your attention can be diverted by any region. A pinprick on your skin can divert your attention. An animal
either drinks, or it chews grass. The system usually chooses. The choice inhibits
irrelevant systems, and activates the motor systems, which then focus you. Your PFR can also set your focus of attention. If you decide to count up to ten, your anger will reduce. You
will become more tactful towards your opponent. An awareness of the
physical symptoms accompanying emotions can also instantly still
activity in the amygdala. This website presents you with ways
to still negative emotions.
But, all these require a little practice.
How
Does The Mind Work?
What Is Combinatorial Coding?
This
brief description assumes that the wisdom of combinatorial coding
makes the mind work. That process can explain the most powerful
living intelligence on earth. Whatever may be your condition in life,
nature has granted you this immense wisdom. Its pattern recognition
mechanisms enable you to feel the emotions of joys, wonder and awe.
They enable you to fathom and understand the complexity of the
cosmos. Make that mind work for your peace and happiness.