The well-tuned brain by Peter C Whybrow
Neurosciences and the life well connected
The modern world owes much to capital markets and to the spirit of
the European Enlightenment, of which America has become the Grand Experiment.
The material affluence we now enjoy validates the Enlightenment principle of
individual freedom and the conviction that scientific and technical advance is
best achieved by harnessing human reason within a competitive marketplace.
Two simple neurobehavioural questions arise from this puzzling
behavior. First, why is it that human beings tend to consume excessively when
living in a resource-rich environment, and second, why despite our growing
conscious awareness of the challenges we face do we find it so difficult to
change our ways. Succinctly, the human brain is not well-tuned to modern
day circumstance.
First our instinctual strivings: the propensity for over-consumption is the relic of a time when individual survival depended upon
fierce compensation for scarce resources. Second, that we are creatures of
habit confounds our instinctual striving. Everyday life would be impossible
without habits. Habits are the brain's way of handling the events of a familiar
world with speed and efficiency, essentially a personal autopilot.Third, is the
cultural change. Habits of intuitive thought are profoundly shaped and given
meaning, by the culture into which we are born.
Today, in the western world, the master cultural narrative is
written in the language if the market. ‘Happiness’ wrote Adam Smith in 17659,
consists in tranquillity and enjoyment and in America it is happiness that has
been the pursuit. Self-interest is the engine of the consumer society, but it
is habit and our fascination with novelty that sustains it. The Scottish
Enlightenment and the Age of Reason, a time of the insatiable curiosity that
gave birth to the Industrial Revolution and provided the philosophical
foundation for Western society today.
Searching for truth about one’s self is a perennial human quest.
The Greeks found it compelling about challenging. Similarly, Benjamin Franklin,
considered three things extremely hard,”steel, a diamond, and to know one’s
self’.
The capacity for self-restraint is further eroded by a market
culture that not only reinforces such acquisitive behaviors, but also has
become economically dependent upon them. Rich world economies are focused by
necessity upon inducing and encouraging additional behaviors - in the US,
consumer spending accounts for some 70% of economic activities. The amount we
consume has become a measure of a nation’s vitality. In today’s society the
twin drivers of commercial growth are the merchant’s discovery that when faced
with material abundance the human brain does not effectively self-regulate
desire and the classical economist’s delusional insistence that it does. As
portrayed in the media, this is the American dream - a world of choice,
material abundance, excitement, energy and self-actualization.
Obesity is now America’s number one problem in public health.
Human beings are designed for survival during times of scarcity rather than
times of plenty. In America, an abundance of cheap & tasty food and the
calories available from the food we consume becomes greater than those required
to meet metabolic need.
The fundamental biology of the stress response - the coordinated
brain-body reaction to uncertainty and threat - is a vital mechanism of
adaptation we share with our evolutionary. A subjective sense of control is of
primary importance to the human mind. Thus highly competitive work environments
- where pressure is pervasive and repeated confrontation are the norm - are
commonly experienced as profoundly stressful. Most affected by chronic
work stress in America are the skilled and semiskilled members of the middle
class, both men and women, who toil long hours with marginal financial
security, often to the neglect of their families and their own health. Social
inequality is also growing in America. Thus, for many middle-class citizens
workplace competition increased while job security decreased, engendering a
rising level of metabolic stress is frequently expressed as anxiety and weight
gain.
First, changing established eating behavior is not easy because we
are creatures of habit: foods, healthy or otherwise that we enjoyed as children
are those that we continue to prefer later in life. This has long been known to
the food industry,. That’s what McDonald’s Happy Meals are all about: giving
young children exactly the tasty treats they want and exactly the high-calorie
diet that they don’t need.
Powerful cultural forces shape each of us. Dynamic social norms -
accepted conventions, about how to live based on attachment, learning, common
experience, and shared intention - continuously shape brain development in
infancy and continue throughout life to mold character. The preconscious
network of reflexive self-knowledge is commonly known as intuition. The
industrial society of the 19th century valued discipline, thrift, organization
and faith as the path to human betterment, devaluing in the process human
emotion and instinct, which the Victorians saw as ‘base’ and immoral’.
Fundamentally the brain chooses in one of two ways: The first is
through acquired habit. This method of decision making is quick, reflexive and
stimulus drive with the brain architecture involved being principally that of
the basal ganglia. The second method the brain has for performing decision
making, is fundamentally through a process of internal competition, where the
relationship between an action taken -actual or imagined - and its consequence
is analyzed and the information retained and coded for future reference. This
process of goal-directed action and decision making is primarily conscious and
reflective and depends upon the integrity of the orbital-frontal cortex.
In the brain, making choices is not a sporadic activity, but a
process designed to produce continuous, adaptive improvement with the
pleasurable experience as the goal.
From the perspective of the behavioral neuroscientist, four simple
words describe the ecology of educational development: attachment, meaning, habit
and trust. These words form a progressive sequence.
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