[extropy-chat] bark sinister
thespike at satx.rr.com
Tue Apr 24 18:22:31 UTC 2007
If You Want to Know if Spot Loves You So, It's in His Tail
< Research has shown that in most animals, including birds, fish and
frogs, the left brain specializes in behaviors involving what the
scientists call approach and energy enrichment. In humans, that means
the left brain is associated with positive feelings, like love, a
sense of attachment, a feeling of safety and calm. It is also
associated with physiological markers, like a slow heart rate.
At a fundamental level, the right brain specializes in behaviors
involving withdrawal and energy expenditure. In humans, these
behaviors, like fleeing, are associated with feelings like fear and
depression. Physiological signals include a rapid heart rate and the
shutdown of the digestive system.
Because the left brain controls the right side of the body and the
right brain controls the left side of the body, such asymmetries are
usually manifest in opposite sides of the body. Thus many birds seek
food with their right eye (left brain/nourishment) and watch for
predators with their left eye (right brain/danger).
In humans, the muscles on the right side of the face tend to reflect
happiness (left brain) whereas muscles on the left side of the face
reflect unhappiness (right brain).
...Chimpanzee brains are asymmetrical in the same ways as human
brains, said William D. Hopkins, a researcher at the Yerkes National
Primate Center and psychologist at Agnes Scott College in Atlanta.
When chimps are excited, they tend to scratch themselves on the left
side of their bodies, reflecting strong negative emotions, he said.
And left-handed chimps are more fearful of novel stimuli than
right-handers. Their dominant right brains may make them more cautious.
Brain asymmetry for approach and withdrawal seems to be an ancient
trait, Dr. Rogers said.>
Makes me wonder if the bias against "sinister" left-handers derives
from their consequent "deceitful"/contrary autonomous facial and
other signaling, something most people would be only unconsciously
aware of, and therefore perhaps a bias especially hard to correct.
More information about the extropy-chat