The hypothalamic-pituitary-adrenal (HPA) axis is a feedback loop that includes the hypothalamus, the pituitary and the adrenal glands. The main hormones that activate the HPA axis are corticotropin-releasing factor (CRF), arginine vasopressin (AVP) and adrenocorticotropin hormone (ACTH). The loop is completed by the negative feedback of cortisol on the hypothalamus and pituitary. The simultaneous release of cortisol into the circulation has a number of effects, including elevation of blood glucose for increased metabolic demand. Cortisol also negatively affects the immune system and prevents the release of immunotransmitters. Interference from other brain regions (eg. hippocampus and amygdala) can also modify the HPA axis, as can neuropeptides and neurotransmitters.
Related content
Migraine is a prevalent neurological disorder characterized by recurrent and disabling attacks of moderate to severe headache
Migraine affects an estimated 1.1 billions worldwide and ranks as the 2nd leading cause of disability, while being the leading among young adults.
In human models of migraine, a suspected pharmacological migraine trigger is administered either orally or via infusion to a participant with migraine or a healthy volunteer, typically within a double-blinded, randomized, placebo-controlled design