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Topic: Neuromodulators


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  Neuromodulators   (Site not responding. Last check: 2007-11-06)
Neuromodulators, which are similar to but distinct from neurotransmitters, act on neurons (whether near or further away) to influence neurons' responses to other neurotransmitters.
Neuromodulators can help to enhance or inhibit neurotransmission that is controlled by neurotransmitters such as dopamine.
A neuromodulator is more likely to be either constitutively released, or released at times of high or low metabolic activity.
pbl.cc.gatech.edu /mindy/383   (106 words)

  
  Neuromodulator - Wikipedia, the free encyclopedia
A neuromodulator is a substance other than a neurotransmitter, released by a neuron at a synapse and conveying information to adjacent or distant neurons, either enhancing or damping their activities.
A neuromodulator is a relatively new concept in the field and it can also be considered as a neurotransmitter that is not reabsorbed by the pre-synaptic neuron or broken down into a metabolite.
Such neuromodulator end up spending a significant amount of time in the CSF (cortico-spinal fluid) and influencing (or modulating) the overall activity level of the brain.
en.wikipedia.org /wiki/Neuromodulator   (134 words)

  
 Neuromodulators - Wikipedia, the free encyclopedia
Neuromodulators modulate regions or circuits of the brain.
Their action can be described as a neuron-neuron exchange of information, rather than an action on specific postsynaptic neurons.
Therefore neuromodulators differ from neurotransmitters, from the point of view of their defining actions.
en.wikipedia.org /wiki/Neuromodulators   (97 words)

  
 cooper:research#2   (Site not responding. Last check: 2007-11-06)
In addition, we are examining the role of neuromodulators on alterations of activity in primary sensory neurons and the integration of the sensory input.
Neuromodulators that are endogenously released either enhance or suppress synaptic efficacy, in turn affecting the behavioral state of an animal.
Neuromodulators affect cellular process by various intracellular messenger cascades that are dependent on the type of neuromodulator and its associated receptor.
biology.uky.edu /Cooper/CooperRes2.htm   (1096 words)

  
 CNS Neurotransmitters and Neuromodulators: Dopamine
CNS Neurotransmitters and Neuromodulators: Dopamine is an indispensable single-volume resource for any researcher involved with dopamine in the central nervous system (CNS).
Part of the CNS Neurotransmitters and Neuromodulators Series, it is destined to be the definitive reference work on this topic.
CNS Neurotransmitters and Neuromodulators: Dopamine is the perfect source for established researchers seeking the latest information or for students requiring an in-depth one-step introduction.
www.ramex.com /cr/cr-2609.html   (155 words)

  
 Welcome to the International Neuromodulation Society
Neuromodulation is used to treat and enhance quality of life in individuals who suffer severe chronic illness due to persistent pain, spasticity, movement disorders, epilepsy, ischaemia, cardiac, bowel and bladder dysfunction, spinal injury, visual, auditory and specific psychiatric disorders.
Neuromodulation is defined as the reversible therapeutic interaction of activity of the central, peripheral and autonomic nervous system with electrical or centrally applied pharmacological agents.
The Vision of the INS is to harness all scientific, clinical and engineering endeavour throughout the world and to brand neuromodulation to encompass all implantable neurological technologies that through electrical or chemical means improve the function of the impaired individual.
www.neuromodulation.com   (526 words)

  
 CNS Neurotransmitters and Neuromodulators: Dopamine
CNS Neurotransmitters and Neuromodulators: Dopamine is an indispensable single-volume resource for any researcher involved with dopamine in the central nervous system (CNS).
Part of the CNS Neurotransmitters and Neuromodulators Series, it is destined to be the definitive reference work on this topic.
CNS Neurotransmitters and Neuromodulators: Dopamine is the perfect source for established researchers seeking the latest information or for students requiring an in-depth one-step introduction.
www.arsmedica.com /cr/cr-2609.html   (155 words)

  
 Huber - Biogenic amines and fighting behavior   (Site not responding. Last check: 2007-11-06)
I have organized symposia on Neuromodulators and Behavior at the 25th International Ethological Conference held August 20-27, 1997 in Vienna, Austria, and a symposium (co-organized with Ed Kravitz) on Hormonal Modulation of Aggression at the 5th International Congress of the Society of Neuroethology on August 23-28, 1998 in San Diego, CA, USA.
This is extremely gratifying as we witness a resurgence of interest in the search for neurobiological mechanisms underlying behavior, a socially pertinent field which is rapidly becoming one of the major growth areas in animal behavior.
This apparent intractability is largely due to the fact that neuromodulators act simultaneously at many different levels, whereas most experimental approaches focus on only one of these.
caspar.bgsu.edu /~lobsterman/research/RHcrusties.html   (1757 words)

  
 CaryfishProjects1   (Site not responding. Last check: 2007-11-06)
Neuromodulators can affect cellular process by various intracellular messenger cascades that are dependent on the type of neuromodulator and its associated receptor.
We plan toexamine if neuromodulator effects on quantal release parameters (m, n and p), within a region of the nerve terminal of two parallel motor neurons, phasic and tonic, having varying degrees of synaptic efficacy, are due to differences in synaptic physiology, metabolic properties, and synaptic structure.
The hypothesis to be tested is that duration-dependence of neuromodulation will be observed to alter the synaptic structure, localization of docked vesicles (within 50 nm of the synapse), and the readily-releasable vesicle populations (within 150 nm of the synapse).
biology.uky.edu /Cooper/crayfishProjects1.htm   (4319 words)

  
 Wiley::Neurotransmitters and Neuromodulators: Handbook of Receptors and Biological Effects, 2nd, Completely Revised and ...
Neurotransmitters and Neuromodulators: Handbook of Receptors and Biological Effects, 2nd, Completely Revised and Enlarged Edition
A complete update of the highly acclaimed handbook with data on all neurotransmitters and the majority of neuromodulators.
The coverage is now even more comprehensive, with 15% more entries on neuropeptides, "classic" neurotransmitters and related substances in a clear, alphabetical format.
www.wiley.com /WileyCDA/WileyTitle/productCd-3527313079.html   (264 words)

  
 Octopamine as a neuromodulator of division of labor   (Site not responding. Last check: 2007-11-06)
Octopamine as a neuromodulator of division of labor
Neuromodulators act by modifying the effects of hormones and neurotransmitters to modulate nervous system responses to various stimuli.
This supports the idea that octopamine acts as a neuromodulator of division of labor, suggesting that high levels are necessary at a time when foraging is possible to alter the responses of other neurons to specific task-related stimuli.
www.life.uiuc.edu /robinson/research/aminesdesc.html   (351 words)

  
 NIH Guide: CHEMICAL SENSES: NEUROTRANSMITTERS AND NEUROMODULATORS
This research includes the identification and characterization of the neurotransmitters, neuromodulators, receptors, and secondary messengers throughout the chemosensory systems.
This Program Announcement (PA), Chemical Senses: Neurotransmitters and Neuromodulators, is related to the priority areas of diabetes and chronic disabling conditions and special population objectives.
Multidisciplinary studies of neurotransmitter and neuromodulatory mechanisms relevant to structure-function relations are encouraged as are collaborative efforts that lead to the integration of information from levels spanning the molecular to the behavioral.
grants.nih.gov /grants/guide/pa-files/PA-96-035.html   (1322 words)

  
 [No title]   (Site not responding. Last check: 2007-11-06)
In the delivery procedure the cells secrete neurotransmitters, neuromodulators or enzymes and have utility in the treatment of neurodegenerative diseases arising from the deficit of certain molecules, particularly molecules of a neurotransmitter, neuromodulator or enzyme which would be then released by the transplanted cells of the invention, eg.
An isolated aggregate of hypoxia sensitive cells that release one or more neurotransmitters, neuromodulators or enzymes characterised in that the aggregate is dimensioned such as to be capable of surviving in a host brain suffering from neurodegeneration or cerebrovascular disorder while substantially reversing some or all of the symptoms of that neurodegeneration or cerebrovascular disorder.
A method for the delivery of neurotransmitters, neuromodulators or enzymes, characterised in that it uses an aggregate of hypoxia-sensitive cells that secrete the neurotransmitters, neuromodulators or enzymes as claimed in any one of Claims 1 to 17.
www.wipo.int /cgi-pct/guest/getbykey5?KEY=99/40924.990819&ELEMENT_SET=DECL   (5608 words)

  
 Psychedelic Information Theory : Neurotransmitters & Neuromodulators: The Psychedelic Connection, by James Kent   (Site not responding. Last check: 2007-11-06)
In effect, neuromodulators are there to fine tune the neural response to incoming stimulus (slow it down, speed it up, shut it off, etc.) and to keep the various disparate brain circuits all functioning smoothly and in unison.
And though there is some feedback response from the higher brain which affects the flow of endogenous amines coming from the brainstem, these neuromodulators mostly tend to produce a bottom-up effect, which means they are switched automatically and unconsciously as directed by the brainstem.
Through the diffuse projection of these neuromodulators, the impulses from the primitive brainstem can have a global effect on the entire brain all at once, thus causing the entire brain organ to speed up, slow down, amplify, or filter signals as it sees fit.
www.tripzine.com /pit.asp?id=pit08   (5785 words)

  
 Drug Addiction - Page 2
Some neuromodulators aid the release of neurotransmitters into the synapse; others inhibit the reabsorption of neurotransmitters so that they remain in the synapse; still others delay the breakdown of neurotransmitters after their reabsorption, leaving them in the tip to be released back into the synapse when the next signal arrives.
This feedback is a normal part of the functioning of all neurons, a simple mechanism that has evolved to make the cell more efficient by adjusting the number of “tools” (receptor proteins) in the membrane “workshop” to suit the workload.
The drug cocaine is a neuromodulator that causes abnormally large amounts of neurotransmitters to remain in the synapses for long periods of time.
www.txtwriter.com /Backgrounders/Drugaddiction/drugs2.html   (1271 words)

  
 Zhen Yan, Ph.D.
Neuromodulators, such as, serotonin, dopamine and acetylcholine, influence CNS functions by regulating the activity of ion channels, which can produce short-term changes in membrane excitability and long-term changes in synaptic plasticity.
Dysfunctions of these neuromodulators in specific brain regions have been implicated in the pathogenesis of various mental disorders, including Schizophrenia, depression and Alzheimer’s disease.
Specifically, electrophysiological techniques, such as whole-cell patch-clamp recordings in dissociated CNS neurons and brain slices, are used to characterize the effect of receptor activation on ion channel function and synaptic transmission.
www.acsu.buffalo.edu /~zhenyan   (1455 words)

  
 NIH Guide: NEUROBIOLOGY OF ETHANOL-RELATED BEHAVIORS
Consequently, NIAAA is seeking research grant applications using state-of-the-art neuroscience and behavioral techniques to elucidate the cellular and molecular mechanisms underlying the acute and chronic actions of ethanol on the brain that mediate ethanol-induced behaviors.
Animal and human studies are needed in which ethanol-induced behaviors, including ethanol-seeking behavior, motor incoordination, cognitive deficits, and aggression are coupled to changes in neurotransmitters and neuromodulators in the brain.
Examples of areas needing further research include, but are limited to: o Development and application of appropriate animal protocols of ethanol-induced behavior changes, coupling in vivo measures of neurotransmitter release or neuroimaging techniques to behavioral paradigms that address relevant medical and social situations related to alcohol abuse and alcoholism.
grants.nih.gov /grants/guide/pa-files/PA-94-077.html   (1639 words)

  
 Anatomy by Level of Organization — Molecular, Advanced
Many peptides act more as neuromodulators than as neurotransmitters.
Neuromodulators are substances that do not propagate nerve impulses directly, but instead affect the synthesis, breakdown, or reabsorption (reuptake) of neurotransmitters.
Neuromodulators can also exert regulatory effects on many extra-synaptic receptors, rather than on synaptic sites exclusively.
www.thebrain.mcgill.ca /flash/a/a_01/a_01_m/a_01_m_ana/a_01_m_ana.html   (651 words)

  
 Amazon.ca: neuromodulators - English Books: Books   (Site not responding. Last check: 2007-11-06)
CNS Neurotransmitters and Neuromodulators by Stone and Trevor E. Stone (Hardcover - 1996)
Neuromodulators and Soft Tissue Fillers, An Issue of Facial Plastic Surgery Clinics by C. Maas (Hardcover - Feb 2007)
Neurotransmitters and Neuromodulators: Handbook of Receptors and Biological Effects by Oliver Von Bohlen Und Halbach and Rolf Dermietzel (Hardcover - Jan 30 2007)
www.amazon.ca /s?ie=UTF8&keywords=neuromodulators&index=books-us&page=1   (259 words)

  
 Harley   (Site not responding. Last check: 2007-11-06)
Her discovery of long-lasting functional enhancement of this brain connection by norepinephrine has highlighted questions both of mechanism and of behavioral importance of this modulation.
Glycogen phosphorylase appears critically involved in the metabolic coupling of glia and neurons and its activation is controlled by a subset of neuromodulators including norepinephrine.
The possibility that the metabolic actions of norepinephrine may be linked to the functional changes seen electrophysiologically is currently under investigation.
www.med.mun.ca /research/neuromod.htm   (291 words)

  
 SouthEastern Biofeedback and Neurobehavioral Institute   (Site not responding. Last check: 2007-11-06)
This control is exerted directly through the rapid acting neurotransmitters, such as glutamate and GABA, neuromodulators which are slower acting, and neurohormones which will even effect motile cells such as blood cells.
It is estimated that the number of possible connections in the brain probably rivals the numbers of all the stars in the universe.
There are four neuromodulators that are of particular importance which are slower acting than GABA and glutamate.
www.eegfeedback.org /neocorticaldynamics.htm   (5776 words)

  
 UW Genome Sciences: Faculty: Richard Palmiter
Our laboratory uses genetic techniques to study the role of neuromodulators in the development and function of the mammalian nervous system.
Most neuromodulators are polypeptides or amino acid derivatives.
They are packaged in synaptic vesicles and released into the synaptic cleft upon neuronal stimulation where they modulate the activity of neurons by binding to membrane receptors coupled to G-protein-linked signaling pathways.
www.gs.washington.edu /faculty/palmiter.htm   (478 words)

  
 Gene organization of ion channels
This inventory gives a complete overview of the main types of neurotransmitters and neuromodulators that have been identified.
Supporting data to fill the tables is still being added.
The list of neurotransmitters and neuromodulators for NeuronDB is a subset of this inventory.
senselab.med.yale.edu /senselab/NeuronDB/transmitters_modulators.htm   (241 words)

  
 Psychology - Exploring Inner Space   (Site not responding. Last check: 2007-11-06)
In the worlds of medicine and psychology, neurobiology is enjoying tremendous popularity and success by virtue of the many discoveries concerning the roles of, among other things, various classes of neurotransmitters, as well as of neuromodulators such as endorphins, enkephalins and neurohormones (neuropeptides) in brain functioning.
Some scientists are claiming that the promised land of a complete mapping of the brain with all its intricate electrical and chemical pathways may be near at hand.
On this view, the sheer number of interactions entailed by the activity of a small set of neurotransmitters, neuromodulators, along with a few different modes of electrical rhythms, is as important, if not more so, than the biological components and kinds of process which are interacting with one another.
www.spiritual-health.org /Sufi/Community/Psychology/emergent.htm   (1556 words)

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