The right hemisphere and the human stress response.

Evidence is presented that most components of the human stress response are influenced asymmetrically by the cerebral hemispheres. The right hemisphere is endowed with a unique response system preparing the organism to deal efficiently with external challenges. Therefore, both the hypothalamic-pituitary-adrenocortical (HPA) axis and the sympathetic-adrenomedullary (SA) axis seem to be under the main control of the right hemisphere.