In the current study, we found significant increases in sAA, as a proposed measure of
SNS activation, in response to a standardized conflict discussion in couples.
Children exposed to institutional rearing exhibited reduced
SNS activation to social stressors, blunted vagal withdrawal to a nonsocial stressor, and blunted cortisol reactivity, indicating a consistent pattern of reduced engagement of stress response systems to environmental challenges following early psychosocial deprivation.
SNS activation plays a big role in overall energy expenditure and lipolysis (burning of fat for energy).
SNS activation in normal people causes the normal heart rate to increase transiently by 10 - 15 beats per minute along with a very slight increase in blood pressure on standing.