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	Postganglionic fiber - Health Encyclopedia
		The preganglionic fiber is very long and postganglionic fiber is very short because ganglion is usually located near or within the target organ.
		Cell body of preganglionic nerve fibers is found in thoracic-lumbar region of spinal cord and terminates in a ganglia near cord; postganglionic fiber is long and innervates the organ.
		1 st or preganglinoic fiber is long; 2 nd or postganglionic fiber is short c.
	www.steadyhealth.com /encyclopedia/Postganglionic_fiber (108 words)

	IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves. Gray, Henry. 1918. Anatomy of the Human ... (Site not responding. Last check: 2007-10-18)
		The preganglionic fibers from this nucleus terminate in the otic ganglion; the postganglionic fibers from the otic ganglion pass to the parotid gland.
		A few of the fibers are said to pass by the inferior colliculus to terminate in the middle portion of the stratum griseum of the superior colliculus, and are probably concerned with reflex movements of the eyes depending on acoustic stimuli.
		The fibers arise from the nucleus of the abducens nerve and pass ventrally through the formatio reticularis of the pons to emerge in the transverse groove between the caudal edge of the pons and the pyramid.
	bartleby.com /107/191.html (8263 words)

	PSM11N
		The afferent fibers are mixed in with somatic fibers and are therefore not anatomically distinct as are the efferent fibers.
		3. The postganglionic fibers arise from vertebral chain ganglia (located in chains next to the vertebral column in the sympathetic and lumbar regions) and from the collateral ganglia located in front of the vertebrae and close to major branches of the abdominal aorta.
		Anatomy of the parasympathetic division - The preganglionic neurons arise from the brain and the sacral division of the spinal cord.
	www.accd.edu /sac/biology/ratorres/printouts/psm11n.htm (1847 words)

	Preganglionic fiber - Health Encyclopedia
		Preganglionic fiber is short, but postganglionic fiber that contacts an organ is long.
		In the experiment the preganglionic fiber is electrically stimulated and the extent of contraction of the nictitating membrane is recorded versus time; drugs may then be added to the synapse and the change in the extent of the contraction (relaxation of the muscle) measured as a function of time.
		Since the distance between spinal cord and sympathetic trunk is small, the preganglionic fiber is short.
	www.steadyhealth.com /encyclopedia/Preganglionic_fiber (147 words)

	Autonomic Nervous System
		The postganglionic fiber terminates on the effector organ (heart, stomach, etc).
		Postganglionic neurons are located within the sympathetic chain ganglia or in collateral ganglia outside of the sympathetic trunk.
		Postganglionic fibers leave the sympathetic trunk through the gray rami and pass through the spinal nerve again before terminating on the effector organ.
	www.ivcc.edu /caley/107/Lectures_Unit_3/ans.html (393 words)

	Autonomic NS
		It is a solely efferent system, however, afferent visceral fibers, associated with the spinal nerve, travel with the efferent fibers and provide information to the CNS concerning the state of the viscera.
		Postganglionic sympathetic fibers.to the sweat glands, however, are cholinergic using acetylcholine as a neurotransmitter.
		Afferent fibers travelling with the sympathetic fibers originate as ‘naked endings" in the walls of the of the organs and carry pain almost exclusively.
	wings.buffalo.edu /smbs/ana/newpage41.htm (1458 words)

	Parasympathetic Nervous System Facts (Site not responding. Last check: 2007-10-18)
		The synapse between the preganglionic and the postganglionic fibers occurs in a ganglion.
		Sympathetic fibers originate in the thoracic and the lumbar regions of the spinal cord.
		Parasympathetic preganglionic fibers originate in the cranial and the sacral regions.
	faculty.ccri.edu /pmoberg/peripheral_nervous_system_facts.htm (645 words)

	Rhythmicity in Single Fiber Postganglionic Activity Supplying the Rat Tail -- Häbler et al. 81 (5): 2026 -- ...
		Distribution of spontaneous activities in 51 postganglionic fibers determined from time periods of 250-300 s (A) and distribution of conduction velocities of 30 postganglionic axons determined from the latency of the responses to electrical stimulation of the lumbar sympathetic trunk (LST) (B).
		Dominant rhythm in the activity of a single postganglionic fiber corresponding neither to PHR rhythmicity nor to the cycle of artificial ventilation.
		to a preponderance of the inspiratory inhibition in postganglionic
	jn.physiology.org /cgi/content/full/81/5/2026 (6412 words)

	Section # 12 The Autonomic Nervous System (ANS) (Site not responding. Last check: 2007-10-18)
		Preganglionic fibers from lacrimal nuclei in the pons synapses in the pterygopalatine ganglia, postganglionic fiber innervates lacrimal glands of eye
		Preganglonic fibers from superior salivatory nuclei in the pons synapses in the submandibular ganglia, postganglionic fibers innervate submandibular and sublingual salivary glands
		Preganglionic fibers from the inferior salivary nuclei in the medulla synapses in the otic ganglia, postganglionic fibers innervate the parotid salivary gland
	www.floyd.edu /academics/divisions/smpe/biology/th/2121/ans.htm (636 words)

	Central command, but not muscle reflex, stimulates cutaneous sympathetic efferents of cats -- Hill and Kaufman 274 (5): ...
		Intravenous injection (arrow) of hexamethonium bromide (20 mg/kg) abolishes the discharge of cutaneous sympathetic postganglionic efferents.
		The spontaneous discharge of 23 of the 41 (56%) fibers was synchronous with lung deflation (Fig.
		The discharge of 12 of the 23 fibers was
	ajpheart.physiology.org /cgi/content/full/274/5/H1552 (3887 words)

	The Autonomic Nervous System (Site not responding. Last check: 2007-10-18)
		preganglionic neuron and a postganglionic neuron that synapse at a ganglion.
		Preganglionic fibers of the inferior salivatory nucleus of cranial nerve IX (glossopharyngeal) synapse on postganglionic fibers in the otic ganglion, which go on to innervate the parotid gland.
		Preganglionic fibers of the dorsal nucleus of the vagus synapse on postganglionic nerves in a variety of ganglia in the thoracic and abdominal region.
	www.georgetown.edu /users/rgk8/neuronr11.htm (1968 words)

	The Structure Function Module
		A significant anatomical distinction between somatic an autonomic fibers is that the cell body of the final efferent neuron of the somatic system is located in the ventral horn of the spinal cord (i.e., within the CNS).
		With the exception of the postganglionic sympathetic fibers (and the adrenal medulla), acetylcholine (ACh) is at autonomic ganglia and neuroeffector junctions, as well as the somatic neuromuscular junction (NMJ).
		Although they are anatomically sympathetic (the preganglionic fibers emerge from the thoracolumbar region of the spinal cord), the fibers are functionally cholinergic (that is, they release ACh at the neuroeffector junction of sweat glands).
	courses.washington.edu /chat543/cvans/sfp (596 words)

	Dr. Clarke Cushing
		Autonomic nerves consist of nerve cells that are either preganglionic or postganglionic.
		Generally, if a postganglionic fiber is affected, Horner's syndrome goes away in weeks to months, depending on the underlying cause.
		If the problem involves a preganglionic fiber, additional diagnostics will likely be needed, unless there is a known history of trauma to the neck or front legs.
	www.lclarkecushingvmd.com /showpracfaq.cfm?FAQID=116&Private=0 (405 words)

	[No title]
		There are also special sympathetic nerves of postganglionic fibers - the cardiac, the mesenteric, the carotid, the hypogastric nerves - these go to the head and the viscera.
		2nd, that postganglionic fiber releases ACH at the synapse with the effector, from the postganglionic postsynaptic membrane.
		The PANS postganglionic fibers release ACH that stimulates muscarinic receptors on the postsynaptic membranes.
	www.izzy.com /~hillary/school/winter.98/pharm1/pharm.lec.01.14.98 (3584 words)

	[No title]
		These preganglionics synapse with their unmyelinated postganglionic in a terminal ganglion which is either in the wall of the target organ, or in one of four named terminal ganglia in the head.
		In terms of the four cranial nerves involved in the parasympathetic division, the oculomotor, facial, and glossopharyngeal nerves synapse in one of the four named ganglia of the head (ciliary, pterygopalatine aka sphenopalatine, submandibular, and otic) and control visceral (involuntary) structures in the head, while the vagus continues inferiorly to innervate thoracic and abdominal viscera.
		The postganglionic is thus very short and usually actually within the wall of the effector where it releases its neurotransmitter in a synapse with the target tissue.
	inside.msj.edu /academics/faculty/murraye/ch16-martini.htm (3274 words)

	APStracts 6:0052N, 1999. (Site not responding. Last check: 2007-10-18)
		Here, we analysed the activity of postganglionic fibers projecting into the ventral collector nerve of anesthetized and artificially ventilated vagotomized Wistar rats with respect to the presence of rhythmic firing under normocapnic conditions.
		Accumulated histograms of sympathetic activity were produced synchronized (i) with the electrocardiogram to detect cardiac rhythmicity, (ii) with phrenic nerve activity to detect modulation with the central respiratory cycle and (iii) with tracheal pressure to uncover a reflex modulation associated with artificial ventilation.
		The dominant rhythm in the activity of two single fibers was neither related to central respiration nor to artificial ventilation.
	www.uth.tmc.edu /apstracts/1999/jn/February/52N.html (347 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		The preganglionic fibers synapse in either the sympathetic ganglia along the vertebral column or in parasympathetic ganglia near the effector organs.
		Some sympathetic fibers synapse in the sympathetic ganglia (acetylcholine is the neurotransmitter) and a postganglionic, unmyelinated fiber then leaves the ganglion and innervates the effector organ while other preganglionic fibers pass through the ganglia without synapsing.
		The sweat glands are also innervated by sympathetic fibers but the postganglionic fibers use acetylcholine as the neurotransmitter which is unlike the rest of the postganglionic fibers that have norepinephrine as the neurotransmitter.
	kumc.edu /research/medicine/pharmacology/CAI/webCAI/anatomy/ua21.wbc (1065 words)

	Complex Regional Pain Syndrome Type 1 (Site not responding. Last check: 2007-10-18)
		That is the ‘dominant small fiber input could result in unchecked transmission of pain through an open gate’ (Purdy and Miller, 1992,p: 1127).
		The sciatic nerve and its distal branches are affected in approximately 40% of cases and it has been suggested that the median and sciatic are most involved as they carry the vast majority of sensory and postganglionic sympathetic fibres to the extremities (Purdy and Miller, 1992,p: 1124).
		Peripheral nerve blocks can provide a degree of sympathetic block as there are ‘sympathetic nerve fibers that travel for variable distances with the somatic nerves but in general the more distally the block is done then the lower is the likelihood of providing a significant pain relief’ (Hamill and Rowlingson, 1994,p: 547).
	podiatry.curtin.edu.au /encyclopedia/crps1 (4671 words)

	ROSACEA-LTD - Flushing
		A high temperature for some may be as early as 3:00 P.M. Flushing usually occurs when the body becomes fatigued and/or stress ed which stimulates the sympathetic nervous system.
		Fiber intake decreases the amount of food that the stomach has at one time and prolongs digestion; therefore, it prevents the sudden influx into the blood stream with the resultant flushing.
		Carbohydrates are needed for energy and as a part of every meal; however, let's try to enjoy the baked potatoes, beans, corn, apples (fruit but still a carbohydrate), etc. instead of simple carbohydrates.
	www.rosacea-ltd-advantages.com /flushing.php (2764 words)

	Physiologic Effects of Anesthesic and Analgesic Agents
		C fibers reinforce the immediate response of A fibers, signal the presence of damaged or inflamed tissue and promote their protection and rest.
		Impulses generated by nociceptors are carried to the central nervous system by A-delta and C fibers whose cell body is in the dorsal root ganglion.
		The differences in numbers of ascending fibers in the lateral tracts of humans compared to that of animals suggest that animals may not be able to receive as much sensory-discriminative information as a person, i.e., less refined ability to localize and to determine the type of stimulus.
	info.med.yale.edu /yarc/vcs/anesthesiaeffect.htm (11447 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		Incomplete peripheral nerve injury often leads to neuropathic pains, some of which are relieved by sympathectomy, and results in sympathetic postganglionic nerve fiber sprouting in the dorsal root ganglion (DRG).
		Immuno-histochemical staining with tyrosine hydroxylase antibody of the S1-S3 DRGs was not correlated with the sensitivity to phentolamine.
		These results suggest that the degree of sympathetic dependence of neuropathic pain is not a function of the extent of the sympathetic postganglionic nerve fiber sprouting in the DRG.
	www.elsevier.com /cdweb/journals/03043940/articles/245/1/S030439409800167.abstract.en (175 words)

	Human Gross Anatomy - Answer Key for Pelvis, Abdomen, and Perineum Examination (Site not responding. Last check: 2007-10-18)
		Postganglionic parasympathetic cell bodies are located in intrinsic ganglia of the ovary.
		Preganglionic fibers follow the lesser and least splanchnic nerves to aortic ganglia near (and including) the superior mesenteric ganglion and the aorticorenal ganglion.
		Postganglionic fibers from these ganglia enter the aortic plexus and extend along the ovarian artery as the ovarian plexus.
	www.humangrossanatomy.ws /anatansguide/essayguide203.html (1551 words)

	RSD Article #5
		Melzack and Wall have suggested that this centrally mediated pathway could be implemented with inappropriately increased afferent activity in the internuncial pool in the spinal cord.
		In appropriate sensation would then be conveyed to the brain through the ascending fibers of the substantia gelatinosa in the dorsal horns of the spinal cord and discharge an abnormal autonomic reflex.
		Sympathetic C postganglionic fibers enter the neural canal along with sensory affereents from the poster rami This sinuvertebral nerve is in close proximity to both the annulus and the neural Contents.
	www.rsdinfo.com /rsdinfo3.0/art_5.htm (2713 words)

	Antietam Valley Animal Hospital
		Autonomic nerves consist of nerve cells that are either preganglionic or postganglionic.
		Generally, if a postganglionic fiber is affected, Horner’s syndrome goes away in weeks to months, depending on the underlying cause.
		If the problem involves a preganglionic fiber, additional diagnostics will likely be needed, unless there is a known history of trauma to the neck or front legs.
	www.antietamvet.com /showpracfaq.cfm?FAQID=116&Private=0 (405 words)

	IASP Newsletter Technical Corner: Testing the Autonomic Nervous System
		The sympathetic is a diffuse system, able to generate mass responses by epinephrine release from the adrenal medulla by virtue of its high postganglionic:preganglionic fiber ratio and long postganglionic fibers.
		Because postganglionic fibers are unmyelinated, they cannot be tested directly by conventional neurophysiologic techniques, i.e., nerve conduction studies and electromyography.
		Postganglionic sympathetic sudo-motor fibers are activated by iontophoresis of Ach into the skin.
	www.iasp-pain.org /TC98NovDec.html (2843 words)

	Cholinergic Transmission
		The preganglionic fibers of the two divisions are functionally identical, and they innervate nicotinic, cholinergic receptors in ganglia to initiate action potentials in the postganglionic fibers.
		Thus, specific blockers are known for cholinergic, muscarinic receptors innervated by postganglionic fibers of the parasympathetic division of the autonomic nervous system, for cholinergic, nicotinic receptors in both sympathetic and parasympathetic ganglia, and for cholinergic nicotinic receptors at the myoneural junction (motor end plates) of the somatic nervous system.
		The gland itself is analogous to a postganglionic sympathetic fiber, but, instead of secreting a neurotransmitter, it secretes epinephrine and norepinephrine into the blood stream, where they function as hormones.
	www.dartmouth.edu /~rpsmith/Cholinergic_Transmission.html (11031 words)

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