A hormone (C8H11NO3) secreted by the adrenal medulla; it also serves as a neurotransmitter, released at synapses; called also noradrenaline. Chemically it is 2-amino-1-(3,4-dihydroxyphenyl)ethanol. It is a precursor of epinephrine in the body.
A catecholamine that is a neurotransmitter of the central nervous system. Disturbances in its tracts apparently figure in depression and mania. It is also a neurotransmitter secreted at the nerve endings of the sympathetic nervous system, a hormone liberated with epinephrine in the adrenal medulla and similar to it in action, and a strong vasoconstrictor.
a hormone produced by the locus coeruleus, similar in chemical and pharmacological properties to epinephrine ( a hormone secreted by the adrenal medulla in response to stimulation of the sympathetic nervous system). Norepinephrine and epinephrine are the two active hormones that cause some of the physiological expressions of fear and anxiety and have been found to be in excess in some anxiety disorders when a disturbance in their metabolism occurs.
A catecholamine neurotransmitter in the peripheral nervous system and central nervous system, released at most sympathetic neuromuscular and neuroglandular junctions, and a hormone secreted by the adrenal medulla; also called noradrenaline.
A chemical found in neurons has many functions. Norepinephrine release is associated with novel or unexpected experiences, which enhance learning and enliven memory. Posit Science programs are designed to up-regulate the production of norepinephrine in the brain by providing new and surprising experiences.
One of the neurotransmitters involved in depression. Research is being conducted into developing drugs that are able to selectively block norepinephrine reuptake, as this action has been shown to be effective in relieving depression.
A neurotransmitter that has been linked to a number of the emotional and physical symptoms of depression. Some of these may include a loss of interest, lack of concentration, and bodily aches and pains.
Neurotransmitter responsible for constricting blood vessels, which can increase blood pressure, blood flow through coronary arteries, rate and depth of breathing, and can relax smooth muscle in the intestinal wall. Back to the top Back to the top
A catecholamine neurotransmitter, produced both in the brain and in the peripheral nervous system. It seems to be involved in arousal, reward and regulation of sleep and mood, and the regulation of blood pressure.
A hormone secreted by the adrenal glands. Norepinephrine is a major neurotransmitter of the sympathetic nervous system that is closely related to epinephrine in its stimulating influence on cardiovascular and glandular activity.
A catecholamine found within the central nervous system (CNS), and the primary neurotransmitter in the peripheral sympathetic branch of the autonomic nervous system. It is also produced in the adrenal medulla. In the brain, NE functions as an excitatory neurotransmitter, responsible for our drive, ambition, alertness, focus and long-term memory (learning).
a hormone/chemical that transmits information across the junction that separates one nerve cell (neuron) from another nerve cell or a muscle. Like other neurotransmitters, it is released at synaptic nerve endings to transmit the signal from a nerve cell to other cells. It is one of the body's chemicals that responds to stresses - such a response is often termed the "flight or fight" syndrome.
A hormone secreted by the adrenal medulla in response to stimulation in the viscera, and stored in granules that stain strongly with chromium salts. Granules are released predominantly in response to hypotension (diminished tension or lower blood pressure).
(NOR-ep-ih-NEF-rin) A chemical made by some nerve cells and in the adrenal gland. It can act as both a neurotransmitter (a chemical messenger used by nerve cells) and a hormone (a chemical that travels in the blood and controls the actions of other cells or organs). Norepinephrine is released from the adrenal gland in response to stress and low blood pressure. Also called noradrenaline.
A neurotransmitter and a hormone. It is released by the sympathetic nervous system onto the heart, blood vessels, and other organs and by the adrenal gland into the bloodstream as part of the fight-or-flight response. Norepinephrine is also present in the brain and is used as a neurotransmitter in normal brain processes.
Norepinephrine, also known as noradrenaline, is a hormone produced by the adrenal glands and also secreted from nerve endings in the sympathetic nervous system as a chemical transmitter of nerve impulses. Many of its general actions are similar to those of adrenalin, but it is more concerned with maintaining normal body activity than with preparing the body for emergencies.
A natural chemical the body generates which acts as a vaso-constrictor [constricts blood vessels]. It also increases heart rate & blood pressure, and opens up the air passages in the lungs. It is generated in response to short-term stress, and serves to mobilize the body's resources in order to meet the stressful challenge.
A chemical messenger that aids communication between many areas of the brain that affect emotional aspects of a person's nature. It is also important in "controlling the volume" of messages about physical discomfort or pain between the brain and body.
A substance, both a hormone and neurotransmitter, secreted by the adrenal glands and the nerve endings of the sympathetic nervous system to cause vasoconstriction and increases in heart rate, blood pressure, and the sugar level of the blood. Norepinephrine release is associated with novel or unexpected experiences, which enhance learning and enliven memory. Posit Science programs are designed to up-regulate the production of norepinephrine in the brain by providing new and surprising experiences.
an important brain neurotransmitter (chemical which enables brain cells to communicate with each other) which plays a role in primitive drives and emotions such as motivation, aggression, and acquisition of food and sex, and body movement. It is sometimes called noradrenaline and is, in fact, the brain's version of adrenaline.
a neurotransmitter found mainly in areas of the brain that are involved in governing autonomic nervous system activity; increases blood pressure by vasoconstriction, but does not affect cardiac output.
hormone secreted in small amounts by the adrenal medulla; produces actions similar to those resulting from stimulation of the sympathetic nervous system, where it is the transmitter substance for the postganglionic neurons; also called noradrenaline
One of the hormones secreted by the adrenal medulla; its action in emotional excitement is similar in some, but not all, respects to that of epinephrine. It is also a neurotransmitter of the central nervous system. Norepinephrine synapses can be either excitatory or inhibitory. Believed to play a role in depression and bipolar disorders (syn. noradrenaline). See also adrenal gland, epinephrine.
Norepinephrine (INN) or noradrenaline (BAN) is a catecholamine and a phenethylamine with chemical formula C8H11NO3. The natural stereoisomer is L-(âˆ’)-(R)-norepinephrine. It is released from the medulla of the adrenal glands as a hormone into the blood, but it is also a neurotransmitter in the nervous system where it is released from noradrenergic neurons during synaptic transmission.