Norepinephrine is also associated with peripheral sympathetic nervous systems including increased heart rate, sweating trembling which may explain this experience in love. Increased activity of norepinephrine generally produces alertness energy sleeplessness and loss of appetite, increased attention, and increased memory for new stimuli which characterize (the earlier) phases of human love. Irrespective, this stress response appears to be important in the formation of social contact and attachment.Ĭentral norepinephrine may also be involved. This “love induced hypercortisolemia” may represent a nonspecific stress response to change that characterizes early phases of relationships or a physiologic state of alertness that may help overcome neophobia. Indeed, subjects in love show higher levels of cortisol when compared to controls. Indeed, some of the signs commonly associated with love-anxiety palpitations increased peristalsis are manifestations of the stress response (albeit in a pleasurable way). Within a homeostatic range, stress-related physiologic processes including the hormones of the hypothalamo-pituitary adrenal axis can help develop and promote social bonding. As a norm, moderate stress encourages social interaction. Stress appears to be the trigger for a quest for pleasure, proximity, and closeness. The early phase of love represents an extreme neurobiological state somewhat contradictory in a physiologic sense from subsequent phases and states. S TRESS AS AN I NITIATOR/F ACILITATOR OF L OVE
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