![]() ![]() This reaction causes a number of changes in your body and is known as the fight-or-flight response. Affects your sleep-wake cycle, mood and memory.Īs a hormone, stress triggers the release of norepinephrine from your adrenal glands.Constricts blood vessels, which helps maintain blood pressure in times of stress.Increases alertness, arousal and attention.What does norepinephrine do in the body?Īs a neurotransmitter in your brain and spinal cord, norepinephrine: Medically, the flight-or-flight response is known as the acute stress response. Norepinephrine is part of your sympathetic nervous system, which is part of your body’s emergency response system to danger - the “fight-or-flight” response. Norepinephrine is made from nerve cells in the brainstem area of your brain and in an area near your spinal cord. As a hormone, it’s released by your adrenal glands, which are hat-shaped glands that sit on top of each kidney.Īs a neurotransmitter, norepinephrine is made from dopamine. As a neurotransmitter, it’s a chemical messenger that helps transmit nerve signals across nerve endings to another nerve cell, muscle cell or gland cell. Norepinephrine, also called noradrenaline, is both a neurotransmitter and a hormone. ![]()
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