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Topic: Neurotransmitter

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  Highbeam Encyclopedia - Search Results for neurotransmitter   (Site not responding. Last check: 2007-11-04)
A neurotransmitter substance secreted from the ends of many neurons and functioning as the main chemical messenger for motor neurons in the peripheral nervous system, including the autonomic nervous system, and as a significant neurotransmitter in the central nervous system,...
Neurotransmitters of the Brain: Serotonin Noradrenaline (Norepinephrine), and Dopamine.
Gene expression in the squid giant axon: neurotransmitter modulation of RNA transfer from periaxonal glia to the axon.
www.encyclopedia.com /articles/09129.html   (898 words)

 Anxiety Zone - Neurotransmitter
Around 10 small-molecule neurotransmitters are generally admitted: acetylcholine, 5 amines, and 3 or 4 amino acids (depending on exact definition used).
Many neurotransmitters are removed from the synaptic cleft by a process is called reuptake (or often simply uptake).
Dopamine acts as the neurotransmitter of choice for cells in the hypothalamus which are effectively the brain's reward system, however it is also involved in the control of movement.
www.anxietyzone.com /glossary/neurotransmitter.html   (785 words)

 Wikinfo | Neurotransmitter   (Site not responding. Last check: 2007-11-04)
Many neurotransmitters are removed from the synaptic gap, after they have activated their specific receptors, by transport proteins residing in neuronal and glial plasma membranes.
It is important to remove neurotransmitters from the synaptic gap so that they do not continue to stimulate or inhibit the firing of the postsynaptic neuron.
Neurotransmitters may be either excitatory or inhibitory; that is, they may be of a type that fosters the initiation of a nerve impulse in the receiving neuron, or they may inhibit such an impulse (more at synapse).
www.wikinfo.org /wiki.php?title=Neurotransmitter   (264 words)

 PND Association
Neurotransmitters are chemical messengers that are released during a nerve impulse to either excite or inhibit nerve function.
There are many neurotransmitters in the body, all of which work together to regulate motor coordination, behavior, temperature, pain mechanisms, blood flow and many other biochemical and physiological properties.
In this pediatric neurotransmitter disease the enzyme SSADH is affected and children have an accumulation of the inhibitory neurotransmitter GABA.
www.pndassoc.org /site/c.iuLWJdMRKpH/b.689419/k.8000/What_Are_Neurotransmitters.htm   (309 words)

 Neurotransmitter - Wikipedia, the free encyclopedia
Neurotransmitters are chemicals that are used to relay, amplify and modulate electrical signals between a neuron and another cell.
Around 10 small-molecule neurotransmitters are known: acetylcholine, 5 amines, and 3 or 4 amino acids (depending on exact definition used), Purines, (Adenosine, ATP, GTP and their derivatives) are neurotransmitters.
For example, at cholinergic synapses (where acetylcholine is the neurotransmitter), the enzyme acetylcholinesterase breaks down the acetylcholine.
en.wikipedia.org /wiki/Neurotransmitter   (937 words)

 [No title]
Once the molecules of neurotransmitter are released from a cell as the result of the firing of an action potential, they bind to specific receptors on the surface of the postsynaptic cell.
Neurotransmitters are made in the cell body of the neuron and then transported down the axon to the axon terminal.
Neurotransmitters are released from the axon terminal when their vesicles "fuse" with the membrane of the axon terminal, spilling the neurotransmitter into the synaptic cleft.
www.lycos.com /info/neurotransmitter--neurotransmitter-release.html?page=2   (780 words)

 neurotransmitter - multiple sclerosis encyclopaedia   (Site not responding. Last check: 2007-11-04)
Neurotransmitters are small molecules whose function is to transmit nerve signals (impulses) from one nerve cell (neuron) to another.
Neurotransmitters are chemical messengers which neurons use to tell other neurons that they have received an impulse.
Neurotransmitters are sythesised in the cell body (the soma) and migrate down the axon to the presynaptic terminals.
www.mult-sclerosis.org /neurotransmitter.html   (500 words)

 Neurotransmitter Repletion
Neurotransmitters are the naturally occurring chemicals inside your body that transmit messages between nerve cells.
Hinz to formulate “Mixed Neurotransmitter Dysfunction Theory.”  Five percent of patients with a given neurotransmitter dysfunction disease are purely a serotonin dysfunction, 5% of patients are a purely catecholamine dysfunction, and the remaining 90% of patients are a mixture of both serotonin/catecholamine dysfunction and lie along a spectrum between the two extremes.
This implies for the vast majority of patients with a neurotransmitter related condition, the serotonin system and the catecholamine system (dopamine, norepinephrine, and epinephrine) must both function properly for the entire system to be healthy and free of neurotransmitter disease.
www.drkaslow.com /html/neurotransmitter_repletion.html   (3922 words)

 Neurotransmitters : by Ray Sahelian, M.D. how to increase neurotransmitter naturally
A neurotransmitter is defined as a chemical messenger which is released from the synaptic terminal of a neuron at a chemical synapse that diffuses across the synaptic cleft and binds to and stimulates the post-synaptic membrane.
Neurotransmitter testing is not a reliable way to determine how a person will respond to a particular medicines or supplement for conditions such as depressions, anxiety, ADHD, etc. Neurotransmitter testing could reveal a neurotransmitter imbalance that would be accurate for that particular time period only.
Neurotransmitter testing is appropriate in cases of neurotransmitter imbalance or excess such as pheochrmocytoma and other clear cut medical conditions.
www.raysahelian.com /neurotransmitter.html   (1821 words)

 Interpretive Guide for Adrenal Stress
Neurotransmitter testing can be particularly useful in determining which psychotropic medications, if any, would be best suited for a particular patient.
Through the use of urinary neurotransmitter testing, the doctor was able to identify imbalances that were likely contributing to the patient's problems.
Urinary neurotransmitter testing provides relevant clinical data for the healthcare provider, allowing for a more informed decision to be made when determining which psychotropic medication is best for the patient.
www.drpressman.com /Library/NeurotransmitterTesting.htm   (1106 words)

 Neurotransmitter Precursors   (Site not responding. Last check: 2007-11-04)
Insufficient activity of the neurotransmitters serotonin and norepinephrine is a central element of the model of depression most widely held by neurobiologists today.
The conceptual case for the effectiveness of neurotransmitter precursors builds upon the idea that depression is a result of an inadequate amount or insufficient activity of one or more neurotransmitters.
On the other hand, the decision with respect to neurotransmitter precursors and prescription antidepressant drugs is not necessarily a case of "one or the other." Growing numbers of individuals are combining various prescription drugs with alternative treatments, and the ranks of M.D.'s integrating alternative treatments into their practice is increasing.
www.thorne.com /altmedrev/fulltext/dep5-1.html   (3368 words)

 neurotransmitter — Infoplease.com
When an electrical impulse traveling along the nerve reaches the axon, the neurotransmitter is released and travels across the synapse, either prompting or inhibiting continued electrical impulses along the nerve.
Neurotransmitters transmit information within the brain and from the brain to all the parts of the body.
The wakefulness that follows caffeine consumption is the result of its blocking the effects of adenosine, a neurotransmitter that inhibits brain activity.
www.infoplease.com /ce6/sci/A0835318.html   (351 words)

 Medical Dictionary: Neurotransmitter - WrongDiagnosis.com
Neurotransmitter: Endogenous signaling molecules that alter the behavior of neurons or effector cells.
Neurotransmitter is used here in its most general sense, including not only messengers that act directly to regulate ion channels, but also those that act through second messenger systems, and those that act at a distance from their site of release.
Neurotransmitter : any of a group of substances that are released on excitation from the axon terminal of a presynaptic neuron and travel across the synaptic cleft to either excite or inhibit the target cell; included are neuromodulators, neuroregulators, neuromediators, neurohormones, and neurohumors, whether or not acting at synapses.
www.wrongdiagnosis.com /medical/neurotransmitter.htm   (291 words)

 NeuroResearch-Continuing Education for physicians and psychologists
Neurotransmitters found in the urine are not neurotransmitters filtered from the renal arterial blood and excreted into the urine.
Neurotransmitter lab testing prior to starting amino acid precursors has no value if the goal of treatment is to optimize relief of disease symptoms.
After reviewing thousands of neurotransmitter lab assays, we have observed that urinary neurotransmitter responses to amino acids (to the right) represent the response of serotonin and dopamine when a dosing change in a serotonin precursor (5-HTP) is given in combination with a dopamine precursor (tyrosine and/or L-dopa).
neuroassist.com   (1385 words)

 Neurotransmitters May Assist Addiction Recovery - Health - RedOrbit
A key part of the treatment at the ranch is neurotransmitter rebalancing _ the use of nutritional supplements containing amino acids, vitamins and minerals to restore balance to the chemical messengers in the brain.
While there is limited research indicating some foods can influence the flow of neurotransmitters in the brain, "I know of no evidence at all that using dietary supplements changes drug-abuse behavior," he said.
Her Courage to Change Ranch combines the neurotransmitter therapy with a structured environment _ putting people to work at the ranch _ along with individual and group therapy and an emphasis on proper nutrition.
www.redorbit.com /news/health/851326/neurotransmitters_may_assist_addiction_recovery/index.html?source=r_health   (1061 words)

 Rediscovering Biology - Online Textbook: Unit 10 Neurobiology
Neurotransmitters are usually small molecules, such as amino acids (e.g, glutamate and aspartate) and amines (e.g., dopamine, serotonin, and histamine).
The effect of the neurotransmitter comes about by its binding with receptor proteins on the membrane of the postsynaptic neuron.
The calcium causes synaptic vesicles that carry the neurotransmitter to fuse with the cell membrane.
www.learner.org /channel/courses/biology/textbook/neuro/neuro_7.html   (387 words)

 Neurotransmitter - Search Results - MSN Encarta
Neurotransmitter, chemical made by neurons, or nerve cells.
Neurons send out neurotransmitters as chemical signals to activate or inhibit the...
Nitric oxide has been shown to be a neurotransmitter.
uk.encarta.msn.com /Neurotransmitter.html   (134 words)

 EP Associations - American Academy for Cerebral Palsy and Developmental Medicine (AACPDM)   (Site not responding. Last check: 2007-11-04)
The Pediatric Neurotransmitter Disease Association is a recently established, nonprofit organization dedicated to helping children and families affected by diseases of neurotransmitter metabolism.
Neurotransmitters are chemicals that permit the passage of signals within the brain.
There are many neurotransmitters in the body, all of which work together to regulate motor coordination, behavior, temperature, pain mechanisms, and blood flow.
www.eparent.com /resources/associations/pediatricNeuro.htm   (1833 words)

 neurotransmitter - Search Results - MSN Encarta
Neurotransmitter, chemical made by neurons, or nerve cells.
Neurons send out neurotransmitters as chemical signals to activate or inhibit the...
The signals conveying everything that human beings sense and think, and every motion they make, follow nerve pathways in the human body as waves of...
encarta.msn.com /neurotransmitter.html   (142 words)

 [No title]
High affinity transport proteins found in the plasma membrane of presynaptic nerve terminals and glial cells are responsible for the removal from the extracellular space of released-transmitters, thereby terminating their actions [1].
Sequence analysis of the Na /Cl neurotransmitter superfamily reveals that it can be divided into four subfamilies, these being transporters for monoamines, the amino acids proline and glycine, GABA, and a group of orphan transporters [5].
The 5-HT neurotransmitter transporter is known to be expressed in the brain and also in the periphery: on platelet, placental and pulmonary cell membranes.
www.ebi.ac.uk /interpro/IEntry?ac=IPR013086   (444 words)

 Neurotransmitter Precursors
The neuronutrient food and hence- the makeup of the brain can be altered by tryptophan, tyrosine and choline because they are the precursors of neurotransmitters substances that are released from a neuron or nerve cell when it fires.
The neurotransmitter thereby conveys the nerve impulse across a synapse to either another neuron, a muscle cell or a secretory cell.
In still another population of cells tyrosine serves as the precursor of dopamine, norepinephrine and epinephrine which are called the catecholamine neurotransmitters.
www.hyperreal.org /nootropics/nutrients/neurotransmitterprecursors   (1015 words)

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