The teen girl’s brain
At puberty, a girl’s thinking
and behavior changes according to the fluctuating levels of oestrogen
(one of the ‘feel good’ hormones), progesterone (‘the brain’s valium’)
and cortisol (the stress hormone) in her brain. Other important hormones
produced are oxytocin (which makes us want to bond, love and connect
with others) and dopamine (stimulates the brain’s pleasure centers).
The effect of these chemicals is
to give a teenage girl a great need for, and pleasure in, gossiping,
shopping, exchanging secrets, experimenting with clothing and hair
styles – anything that involves connecting and communicating. Teenage
girls are always on the phone because they actually need to
communicate to reduce their stress levels. Their squeals of delight at
seeing friends, and the corresponding panic at being grounded, is also a
part of these changes. The dopamine and oxytocin rush girls experience
is “the biggest, fattest neurological reward you can get outside of an
orgasm”, Brizendine remarks.
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Me and my girls c. TEENAGE! |
Why exactly does the loss of a friendship feel so
catastrophic to a teenage girl, and why is her group so important to
her? Physiologically, she is reaching the optimum age for child-rearing,
and in evolutionary terms she knows that a close-knit group is good
protection, since if she has a small child with her she is not able to
attack or run away as a man can. (Cannon’s 1932 concept of ‘flight or
flight’ in response to danger is an observation of men rather than
women.) As the threat of losing close ties to a group can be
frightening, female friendships need to be tight. Close social bonds
actually alter the female brain in a highly positive way, such that any
loss of those relationships triggers a hormonal change which intensifies
the feelings of abandonment or loss. The intensity of female pubescent
friendships therefore also has a biochemical basis.
The teenage girl’s confidence and ability to deal
with stress change according to the time of the month, and Brizendine
has treated many ‘problem’ girls who experience higher than average
hormonal changes. The most brash and aggressive girls often have high
levels of androgens, the hormones associated with aggression. At normal
levels, fluctuations in androgens can cause a girl to be more focused on
power, whether within the peer group or over boys.
Incidentally, why do boys often become brooding
and monosyllabic? The testosterone that marinates their brains not only
drives them to ‘compelling masturbatory frenzies’, but also reduces
their wish to talk or socialize if it does not involve girls or sport.
In summary, in the teen years the differing
hormonal affects on the brain cause males and females to go off in
different directions: boys gain self-esteem through independence from
others, while females gain it through the closeness of their social
bonds.
From: The Female Brain
by Louann Brizendine