Symmetry of Homosexual Brain resembles that of Opposite Sex - Simetria del cerebro Homosexual es similar a la del sexo opuesto.

ScienceDaily (Jun. 18, 2008) — Swedish researchers
have found that some physical attributes of the homosexual
brain resemble those found in the opposite sex, according to
an article published online (June 16) in the Proceedings of
the National Academy of Sciences.

Ivanka Savic and Per Lindström, of the Department of Clinical
Neuroscience at the Karolinska Institute in Stockholm, Sweden,
now report that the brains of heterosexual men and homosexual
women are slightly asymmetric—the right hemisphere is larger
than the left—and the brains of gay men and straight women are not.

Positron emission tomography (PET) scans taken by the
researchers also show that in connectivity of the amygdala
(which is important for emotional learning), lesbians
resemble straight men, and gay men resemble straight
women. The researchers analyzed the brains of 90 subjects,
using magnetic resonance imaging (MRI) to assess brain
volume and PET data partly gleaned from previous
olfactory studies.

One possible interpretation of the connectivity
pattern in straight men and lesbians is that the
amygdala is wired for a greater fight-or-flight
response, the authors say.