The study found that conservatives have a larger right amygdala. The amygdalae, of which there are two, one in each hemisphere of the brain, are associated with reactions to fear, the study said . On the other hand, liberals have a larger anterior cingulate cortex, or ACC. Other studies had already determined that, based on liberal / conservatives views, those same sections of the brain had greater activity. This was the first such study to associate physical differences with political views.
March 29, 2013 1:38 pm |
Some people are night owls, and others are morning larks. What makes the difference may be their levels of general intelligence . Virtually all species in nature , from single-cell organisms to mammals, including humans, exhibit a daily cycle of activity called circadian rhythm . The circadian rhythm in mammals is regulated by two clusters of nerve cells called the suprachiasmatic nuclei (SCN) in the anterior hypothalamus. Geneticists have by now identified a set of genes that regulate the SCN and thus the circadian rhythm among mammals. However, humans, unlike other mammalian species, have the unique ability, consciously and cognitively, to override their internal biological clock and its rhythmic outputs.