Cabala, this strange creation of the feminine and masculine principle is known as "Adam
Kadmon," both Adam and Eve, a Golem. This conjunction of opposites is part of the
science of alchemy, or hermeticism, and is especially beloved by occult magicians. In
witchcraft, it is known as the joining of sun and moon, and sacred sex rituals are common.v Are there actually significant differences between a girl's brain and a boy's brain?
Sex differences in the brain begin in the womb. About midway through pregnancy, the
testicles of a developing baby boy start churning out testosterone in substantial
quantities, achieving serum testosterone concentrations comparable to those seen in
young adult men. These sex hormones, transformed by aromatase enzymes within the
brain, bind to brain tissue and begin to transform it. Between 18 and 26 weeks gestation,
the developing brain is permanently and irreversibly transformed. Israeli scientists
Reuwen and Anat Achiron have found that if you do a regular ultrasound examination
when a woman is 26 weeks pregnant, you can distinguish a female brain from a male
brain.
Source: Reuwen Achiron, Shlomo Lipitz, & Anat Achiron.
Sex-related differences in the development of the human fetal corpus callosum: in utero
ultrasonographic study. Prenatal Diagnosis, 2001, 21:116-120.This in utero study confirmed the findings of a previous anatomical study in which
investigators examined the brains of babies which had died before birth. See: M. de
Lacoste, R. Holloway, and D. Woodward, "Sex differences in the fetal human corpus
callosum."
Human Neurobiology, 1986, 5(2):93-6.
Once those changes have occurred, they are permanent. Research with both humans
and with laboratory animals shows that you are born with a male brain or a female
brain; postnatal experiences, even experiences as extreme as castration, will not change
your brain from male to female, or vice versa. One research team recently compared
brain tissue from the brains of young girls and young boys. They found that sex
differences in the structure of the brain were obvious, even in babies — especially in
babies. The differences in the photomicrographs of the brain tissue are so dramatic that
they are readily visible to the naked eye.
Source: María Elena Cordero, Carlos Valenzuela, Rafael Torres, Angel Rodriguez,
"Sexual dimorphism in number and proportion of neurons in the human median raphe
nucleus," Developmental Brain Research, 124:43-52, 2000.
Emotion. Neuroscientists at Harvard University have used sophisticated MRI imaging
to examine how emotion is processed in the brain of children between the ages of 7 and
- In young children, they found that emotional activity was localized in primitive sub-
cortical areas of the brain, specifically in the amygdala. That's one reason why it doesn't
make much sense to ask a 6-year-old to tell you why she is feeling sad. The part of the
brain that does the talking, up in the cerebral cortex, doesn't connect to the part of the
brain where the emotion is occurring, namely the amygdala. In adolescence, brain
activity associated with emotion moves up to the cerebral cortex. So, the 17-year-old is
able to explain what she is feeling, and why, in great detail and without much difficulty.
But that change occurs only in girls. In boys, the locus of emotional control remains