CATECHOLAMINE

kătˌəkôlˈəmēn, any of several compounds occurring naturally in the body that serve as hormones or as neutrotransmitters in the sympathetic nervous system. The catecholamines include such compounds as epinephrine, or adrenaline, norepinephrine, and dopamine. They resemble one another chemically in having an aromatic portion (catechol) to which is attached an amine, or nitrogen-containing group. Epinephrine and norepinephrine, which are also hormones, are secreted by the adrenal medulla, and norepinephrine is also secreted by some nerve fibers. These substances prepare the body to meet emergencies such as cold, fatigue, and shock, and norepinephrine is probably a chemical transmitter at nerve synapses. Dopamine is an intermediate in the synthesis of epinephrine; in addition, a deficiency of dopamine in the brain is responsible for the symptoms of Parkinson's disease. Medical administration of the drug L-dopa, which is presumed to be converted to dopamine in the brain, relieves the symptoms. Epinephrine is used medically to stimulate heartbeat and to treat emphysema, bronchitis, and bronchial asthma and other allergic conditions, as well as in the treatment of the eye disease glaucoma.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Catecholamine
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books on: Catecholamine  - 456 results

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...arousal Panksepp 1986:89 . The third catecholamine, dopamine, is also a neurotransmitter...either to interfere with or to enhance catecholamine neural transmission during electrical...researchers found that injections of catecholamine depleters, drugs that deplete the...
...hyperactive catecholaminergic function. The catecholamine theory of schizo-affective disorders...here is that an intermediate level of catecholamine function may be associated with an...is to restore the optimal level of catecholamine activity: in patients with depressive...
...individuals also tended to have lower catecholamine base rates. With several colleagues...aerobic training would lead to increased catecholamine capacities, ran counter to most physiologically...exercise elicited high SNS arousal and catecholamine generation, suggesting that repeated...
...predominantly on cardiovascular and catecholamine outcomes, which are two of the...research. Cardiovascular and Catecholamine Reactivity The training effect of exercise on cardiovascular and catecholamine parameters, and their concomitant...
...tachycardia in pregnancy have a form of catecholamine-sensitive ventricular tachycardia...histories suggested a possible role for catecholamine sensitivity. Fetal outcomes were very...These Table 29-2. FEATURES OF CATECHOLAMINE-SENSITIVE VENTRICULAR TACHYCARDIA...
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journal articles on: Catecholamine  - 159 results

       More journal Results: 1-10 11-20 21-30 31-40 41-50 >>  
 
Two Urinary Catecholamine Measurement Indices for Applied...are highly correlated, salivary catecholamine content is only slightly correlated...compared two different indices of catecholamine measurement. CONCLUSIONS Our main...
...vitro effects of BDE-47 on vesicular catecholamine release and intracellular Ca.sup...BDE-47 did not reveal changes in catecholamine release parameters. Modest effects...the postsynaptic density (PSD) and catecholamine release from chromaffin cells to further...
...allele, through its influence on PFC catecholamine metabolism, may reduce the potential...rats indicate a greater effect on PFC catecholamine levels in response to evoked catecholamine release than on baseline PFC catecholamine...
...significant increases in norepinephrine (the catecholamine most closely aligned with physical...physical stress evokes elevations of catecholamine levels, predominantly norepinephrine...subjects generally have had greater catecholamine responses, especially NE, to physical...
...reproductive tract in males. Because multiple catecholamine systems are present in the brain...findings suggest that ATR could disrupt catecholamine metabolism by altering its biosynthetic...ATR can adversely affect hypothalamic catecholamine systems has notable implications because...
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magazine articles on: Catecholamine  - 27 results

       More magazine Results: 1-10 11-20 21-27 >>  
 
...surprising that serotonin, like its catecholamine counterparts, possesses a diversity...hypothesis involves abnormal function of the catecholamine (primarily norepinephrine) and...selective inhibitors of 5-HT uptake than catecholamine uptake compared to secondary amines...
...community of ADHD researchers as the "catecholamine hypothesis" to explain what is wrong...catecholamines referred to in the phrase "catecholamine hypothesis" are among the dozens of...neurotransmitter dysfunction, in this case a catecholamine imbalance. The catecholamines are...
...related cause of hypertension. These catecholamine secreting tumors in the adrenal medulla...diagnosed by measuring plasma or urine catecholamine levels and their metabolites (vanillylmandelic...stabilize blood pressure. Due to the catecholamine involvement, agents such as alpha...
...monoamines. Most data pointed to a critical role of enhancing catecholamine functions, but TCAs also had actions involving brain serotonin...results from an upregulation of the brain receptors for catecholamine neurotransmitters, dopamine, and norepinephrine. 17...
...seizures, and ineffective thought patterns. Dopamine, a catecholamine, mimics the effects of the sympathetic nervous system by...another neurotransmitter that scientists also classify as a catecholamine. It is made in the brain stem and the adrenal medulla...
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newspaper articles on: Catecholamine  - 4 results

 
 
...studies, capsaicin from chili reduced adiposity in rats by enhancing energy and lipid metabolism, possibly by increasing catecholamine (epinephrine and norepinephrine) secretions. In some human studies, meals containing chili in lean young people have...
...phoned 999." By the time the ambulance arrived, Allison lost consciousness and was suffering from what is known as a catecholamine crisis, caused by adrenal glands flooding her body with excessive amounts of adrenaline and non-adrenaline. She admits...
...Stewart about it if he hadknown earlier but would still have gone ahead with the activity. The cause of death was given as catecholamine polymorphic ventricular tachycardia. Recording a narrative verdict at the inquest in Brecon, Powys Coroner Peter Maddox...
...wear out your adrenal glands and drain your energy. Eggs contain an amino acid called tyrosine which is converted into catecholamine, a chemical that acts as a natural stimulant. Vitamin D helps this process take place, so have some milk or yoghurt too...


 

encyclopedia articles on: Catecholamine  - 5 results

 
 
CATECHOLAMINE kat kol men, any of several compounds occurring naturally in the body that serve as hormones or as neurotransmitters in the sympathetic...
EPINEPHRINE ep nef rin, hormone important to the bodys metabolism, also known as adrenaline. Epinephrine, a catecholamine , together with norepinephrine , is secreted principally by the medulla of the adrenal gland . Heightened secretion caused...
DOPAMINE dop men, one of the intermediate substances in the biosynthesis of epinephrine and norepinephrine. See catecholamine . ____________________ Copyright 2009 Columbia University Press. Used with the permission of Columbia...
NOREPINEPHRINE nor epinef r n, a neurotransmitter in the catecholamine family that mediates chemical communication in the sympathetic nervous system, a branch of the autonomic nervous system. Like...
...drug is also called levodopa. Parkinsons disease results when the concentration of dopamine in the brain is depleted (see catecholamine ). Medical administration of dopamine itself is ineffective since that chemical apparently does not enter the brain from...


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