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Topic: Parasympathetic


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  Parasympathetic nervous system - Wikipedia, the free encyclopedia
The parasympathetic nervous system is one of three divisions of the autonomic nervous system.
Sometimes called the rest and digest system, the parasympathetic system conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles in the gastrointestinal tract.
While an oversimplification, it is said that the parasympathetic system acts in a reciprocal manner to the effects of the sympathetic nervous system; in fact, in some tissues innervated by both systems, the effects are synergistic.
en.wikipedia.org /wiki/Parasympathetic_nervous_system   (472 words)

  
 SYMPATHETIC &PARASYMPATHETIC DIVISIONS. Free term papers for college, book reports and research papers. Welcome to EZ ...
Ganglia of the parasympathetic division are in intramural or close to the visceral organ served.
The parasympathetic effects of the cilliary muscle of the eye are to stimulate muscles, which result in the bulging of the lens for accommodation and close vision.
The parasympathetic constricts for the bronchioles of the lungs, where the bronchioles are dilated in the sympathetic.
www.eztermpapers.com /essay/015632.html   (797 words)

  
 The Parasympathetic Nervous System
The gradual maturation of the parasympathetic system is associated with the capacity to inhibit sympathetic activity, and results in a reduction in mobilization and baseline levels of arousal.
Parasympathetic activity is associated with inhibition of the intrinsic pacemaker of the heart, and results in a lower resting heart rate.
The faint response is a condition of parasympathetic arousal elicited in the face of emotional stress or shock, which results in lowered heart rate and blood pressure.
www.veroniquemead.com /pns.php   (2042 words)

  
 Autonomic nervous system : Parasympathetic nervous system
These tasks are under the control of the parasympathetic nervous system, which lowers the heart rate and the blood pressure, diverts a great amount of blood back to the skin and the gastrointestinal tract, contracts the pupils of the eyes as well as the bronchioles, stimulates secretion in the salivary glands and accelerates peristalsis.
As regards the sympathetic nervous system they lie in the thoracal and lumbal segments of the spinal cord, the preganglionic parasympathetic cell bodies are situated in the brain stem (cranial parasympathetic) and in the sacral spinal cord (sacral parasympathetic).
The axons of the sympathetic and sacral parasympathetic fibres leave the spinal cord through its ventral root, enter the spinal nerve and then the white communicating branch, from where they run to their further destination.
www.fastload.org /pa/Parasympathetic_nervous_system.html   (651 words)

  
 Nifedipine-induced inhibition of parasympathetic-mediated vasodilation in the orofacial areas of the cat -- Izumi and ...
Parasympathetic effects were evoked by electrical stimulation of either the central (for LBF) or peripheral (for TBF) cut end of the LN in vagosympathectomized cats.
Parasympathetic vasodilation was evoked by electrical stimulation of either the central (for LBF) or the peripheral (for TBF) cut end of the LN in vagosympathectomized cats.
Parasympathetic vasodilator responses in the LBF (A) and TBF (B) were evoked by electrical stimulation of either the central (for LBF) or peripheral (for TBF) cut end of the LN in vagosympathectomized cats.
ajpregu.physiology.org /cgi/content/full/279/1/R332   (4852 words)

  
 Parasympathetic Nervous System   (Site not responding. Last check: 2007-11-01)
The parasympathetic is a subdivision of the autonomic nervous system, and it operates in tandem with the other subdivision, the sympathetic nervous system.
Parasympathetic innervation contracts the ciliary muscle ring, reducing tension on the lens; the lens then rounds up for near focus.
Parasympathetic innervation of the iris constricts the pupillary opening, again shortening and clearing focus, as well as reducing the brightness of the image.
sky.bsd.uchicago.edu /lcy_ref/synap/parasympathetic.html   (1934 words)

  
 How Parasympathetic Nerves Tie In With PE and EDÂ…
By strengthening your parasympathetic nervous system and restoring it to its youthful potential, you can revive your erections and then work on solving your premature ejaculation problem.
Parasympathetic nerves are present in all of your organs and do different things.
For example, the prostate gland’s parasympathetic nerve controls the contractions (locking and unlocking) of your ejaculatory valve, triggering a release of semen upon orgasm.
www.herballove.com /article.asp?art=22   (823 words)

  
 Submandibular responses to stimulation of the parasympathetic innervation in anesthetized sheep -- Edwards et al. 95 ...
of the parasympathetic innervation and the output of vasoactive
of submandibular vascular and secretory responses to parasympathetic
Submandibular responses to stimulation of the parasympathetic innervation in bursts in the anaesthetized ferret.
jap.physiology.org /cgi/content/full/95/4/1598   (4356 words)

  
 Parasympathetic
The autonomic nervous system (ANS), is divided anatomically into three components: the parasympathetic, with cranial and sacral connections; the sympathetic, with central nervous connections in the thoracic and lumbar segments of the spinal cord; and the enteric nervous system which occupies the digestive tract.
The parasympathetic and sympathetic components of the ANS control the involuntary body functions via the distribution of nerve fibers to the various organs and glands, whereas the enteric nervous system is involved primarily with the internal regulation of the gustatory processes.
This would be consistent with a failure to reduce sympathetic and to increase parasympathetic activity during the night, and with the failure to lower blood pressure.
www.macses.ucsf.edu /Research/Allostatic/notebook/parasym.html   (2725 words)

  
 Parasympathetic Nervous System - Search Results - MSN Encarta   (Site not responding. Last check: 2007-11-01)
Parasympathetic Nervous System, half of the autonomic nervous system, controlling involuntary actions such as heartbeat and respiration in...
The nervous system has two divisions: the central nervous system and the peripheral nervous system.
Two antagonistic divisions make up the autonomic nervous system: the sympathetic, or thoracicolumbar, division, which stimulates the heart, dilates...
encarta.msn.com /Parasympathetic_Nervous_System.html   (187 words)

  
 Rodney L. Parsons
Cardiovascular disease is a major cause of death in the USA and dysfunction of the neural regulation of the heart is an important factor in the etiology of cardiac disease.
The emphasis of current research activities is the elucidation of mechanisms that regulate the excitability of parasympathetic and sympathetic neurons innervating cardiac tissues.
The role of intracellular calcium in regulating excitability of autonomic neurons uses parasympathetic cardiac neurons from the mudpuppy, an aquatic amphibian, and guinea pig sympathetic neurons.
www.uvm.edu /~annb/faculty/parsons   (650 words)

  
 Parasympathetic dominance and calcium deficiency by Dr. Howard F. Loomis   (Site not responding. Last check: 2007-11-01)
In order to respond to parasympathetic stimulation, it is necessary for potassium to accumulate inside the cells of those tissues being stimulated.
In other words, a calcium deficiency results in symptoms of parasympathetic dominance because the cells lack adequate calcium to respond to sympathetic stimulation.
The symptoms of parasympathetic dominance are many, and I refer you to the many good textbooks in your library for details.
www.worldchiropracticalliance.org /tcj/2001/aug/aug2001loomis.htm   (759 words)

  
 Parasympathetic effects on cardiac electrophysiology during exercise and recovery -- Kannankeril and Goldberger 282 ...
Depressed parasympathetic tone is associated with an increased risk of sudden cardiac death.
Parasympathetic effects on all parameters during rest, exercise, and recovery are shown in Table 2 and Fig.
Mean (± SD) parasympathetic effect (in ms) at rest (R), during exercise (Ex), and during recovery (Rec) on sinus cycle length, AV block cycle length, AV interval at a paced cycle length of 400 ms, and VERP.
ajpheart.physiology.org /cgi/content/full/282/6/H2091   (4559 words)

  
 Stress (medicine) - Wikipedia, the free encyclopedia
Our modern lifestyle tends to cause continual sympathetic nervous system activation with very little opportunity for the parasympathetic (also called 'vegetative') nervous system to activate.
When this sympathetic system is active, the bowel and other non-muscle organs receive good blood-flow, the pupils constrict, the glands all function well and secrete their various compounds.
Absence of the autonomic parasympathetic activation leads to poor digestion and probably also to poor healing and organ function.
en.wikipedia.org /wiki/Stress_(medicine)   (3000 words)

  
 Sympathetic and parasympathetic control of heart rate in unanaesthetized fetal and newborn lambs. Sympathetic and ...
Sympathetic and parasympathetic components of reflex cardiostimulation during vasodilator treatment of hypertension.
Fetal lambs showed a progressive increase in parasympathetic restraint of heart rate; vagal influence in the newborn lamb was similar to the term fetus.
We conclude that withdrawal of parasympathetic tone is an important determinant of circulatory homeostasis after acute vasodilatation during beta-adrenoreceptor blockade.
www.hairmillion.com /rx-online-info/propranolol-online-rx/propranolol-online-rx.1454.html   (592 words)

  
 Sympathetic and parasympathetic cardiac control in athletes and nonathletes at rest. Role of EDRF/NO in parasympathetic ...
The sympathetic multiplier, m, was similar (1.18 +/- 0.06 vs. 1.20 +/- 0.05, P greater than 0.4) in the two groups, but n, the parasympathetic multiplier, was closer to 1 in the athletes (0.57 +/- 0.03 vs. 0.51 +/- 0.05, P less than 0.01).
We conclude that the model is suitable for the quantitative study of sympathetic/parasympathetic heart rate control in humans, and that the lower resting heart rate in oarsmen is solely due to a reduction in intrinsic cardiac rate, and not to an increase in parasympathetic tone.
The role of endothelium-derived relaxing factor (EDRF) in parasympathetic coronary vasodilation following carotid chemoreflex activation induced by nicotine in conscious dogs and stimulation of the vagus nerve in anesthetized dogs was studied.
www.hairmillion.com /rx-online-info/propranolol-online-rx/propranolol-online-rx.1455.html   (648 words)

  
 The power of the parasympathetic nervous system   (Site not responding. Last check: 2007-11-01)
We move into the Parasympathetic when we have relinquished control, and when the Sympathetic has finished its job, i.e., when we have expended all that energy by fighting or by running as fast as our legs will carry us.
It is always the power of the Parasympathetic that restores calm to the surface, harmony to the mad ups-and-downs of life.
Using highly sophisticated techniques and incredible discipline, devotees work toward strengthening and developing their Parasympathetics to such an extraordinary degree that all the systems and senses of the body become saturated with vitality and well-being.
www.isma.org.uk /stressnw/parasymp01.htm   (2635 words)

  
 RedOrbit - Health - Parasympathetic Nervous System at Risk
Damage to the parasympathetic nervous system may account for nearly half of the typical symptoms-including gallbladder disease, unrefreshing sleep, depression, joint pain, chronic diarrhea, and sexual dysfunction-that afflict those with Gulf War syndrome, according to a study by the University of Texas Southwestern Medical Center at Dallas.
The parasympathetic system regulates primitive, automatic bodily functions such as digestion and sleep, while the sympathetic nervous system controls the "fight or flight" instinct.
After plotting the subtle alterations in heart function using a mathematical technique called spectral analysis, researchers found that parasympathetic brain function, which usually peaks during sleep, barely changed in veterans with Gulf War syndrome even though they appeared to be sleeping.
www.redorbit.com /news/display/?id=125690   (497 words)

  
 parasympathetic nervous system - HighBeam Encyclopedia   (Site not responding. Last check: 2007-11-01)
PARASYMPATHETIC NERVOUS SYSTEM [parasympathetic nervous system] see nervous system.
Find newspaper and magazine articles plus images and maps related to "parasympathetic nervous system" at HighBeam.
Ask Dr. H: Parasympathetic nervous system causes that sleepy feeling after a big meal Ask Dr. H Mitchell Hecht
www.encyclopedia.com /html/X/X-parasymp.asp   (138 words)

  
 Effect of bradykinin on membrane properties of guinea pig bronchial parasympathetic ganglion neurons -- Kajekar and ...
We postulated that the effects mediated by bradykinin in parasympathetic ganglion neurons are secondary to activating a peripheral
receptor antagonist HOE-140 on bradykinin-induced membrane depolarization in guinea pig bronchial parasympathetic ganglion neurons.
Anatomical and electrophysiological comparison of the sensory innervation of bronchial and tracheal parasympathetic ganglion neurons.
ajplung.physiology.org /cgi/content/full/278/3/L485   (3809 words)

  
 parasympathetic nervous system
Parasympathetic or visceromotor nucleus: Edinger - Westphal nucleus, dorsally to
The parasympathetic nervous system is one of the two divisions of the autonomic nervous system, the other division being the sympathetic nervous system.
The sympathetic and parasympathetic branches of the ANS
www.health-get.com /info/parasympathetic_nervous_system.html   (1954 words)

  
 Substantial cardiac parasympathetic activity exists during heavy dynamic exercise in dogs -- O'Leary et al. 273 (5): ...
We investigated the extent of functional parasympathetic and sympathetic activity to the heart at rest and during mild to
Across species the amount of tonic parasympathetic and sympathetic activity to the heart at rest varies widely.
The retention of tonic parasympathetic tone during exercise may be advantageous in terms of the ability to rapidly respond
ajpheart.physiology.org /cgi/content/full/273/5/H2135   (3694 words)

  
 parasympathetic testing
Since magnesium di-potassium EDTA suppositories are able to generate a parasympathetic shift, clients who have parasympathetic dominance to begin with may show signs of parasympathetic excess.
In this case, salt, phosphorous and the amino acids tyrosine, phenylalanine, glycine and glutamine may be indicated to help normalize their autonomic balance.
Slow pulse: Pulse of 50-70 with a systolic of 92-110 and a diastolic of 90-50 indicates parasympathetic dominance.
www.goldenworks.us /parsympathetic.html   (325 words)

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