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Topic: Nerve

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In the News (Fri 24 May 19)

  Vagus Nerve   (Site not responding. Last check: 2007-09-30)
The vagus nerve is the longest of the cranial nerve.
The viscerosensory component of the vagus are derived from nerves that have receptors in the abdominal viscera, esophagus, heart and aortic arch, lungs, bronchia and trachea.
The general sensory components of the tenth cranial nerve conduct sensation from the larynx, pharynx, skin the external ear and external auditory canal, external surface of the tympanic membrane, and the meninges of the posterior cranial fossa.
www.meddean.luc.edu /lumen/MedEd/GrossAnatomy/h_n/cn/cn1/cn10.htm   (703 words)

  Nerve - Wikipedia, the free encyclopedia
A nerve is an enclosed, cable-like bundle of nerve fibers or axons, which includes the glia that ensheath the axons in myelin.
These signals, sometimes called nerve impulses, are also known as action potentials: rapidly traveling electrical waves, which begin typically in the cell body of a neuron and propagate rapidly down the axon to its tip or "terminus." The signals cross over from the terminus to the adjacent neurotransmitter receptor through a gap called the synapse.
Nerve damage or pinched nerves are usually accompanied by pain, numbness, weakness, or paralysis.
en.wikipedia.org /wiki/Nerve   (288 words)

 Pudendal nerve - Wikipedia, the free encyclopedia
Pudendal Nerve Entrapment (PNE) is akin to Carpal Tunnel syndrome.
Branches of this nerve communicate with the perineal branch of the posterior femoral cutaneous and with the posterior scrotal nerves at the forepart of the perineum.
dorsalis penis) is the deepest division of the pudendal nerve; it accompanies the internal pudendal artery along the ramus of the ischium; it then runs forward along the margin of the inferior ramus of the pubis, between the superior and inferior layers of the fascia of the urogenital diaphragm.
en.wikipedia.org /wiki/Pudendal_nerve   (677 words)

 eMedicine - Nerve Entrapment Syndromes : Article by Dachling Pang, MD, FRCS(C), FACS
The suprascapular nerve arises from the lateral aspect of the upper trunk of the brachial plexus, runs across the posterior triangle of the neck together with the suprascapular artery and the omohyoid muscle, dips under the trapezius, and then passes through the suprascapular notch at the superior border of the scapula.
This almost 90-degree kink of the nerve often is exaggerated by a thickened ridge in the iliacus fascia as it attaches to the posterior aspect of the inguinal ligament.
To avoid kinking the nerve at both ends of the transposition, a block of the intermuscular septum is removed in the proximal end, and the aponeurosis and muscles fibers of the flexor carpi ulnaris are split longitudinally between the 2 heads.
www.emedicine.com /med/topic2909.htm   (6993 words)

 IX. Neurology. 5l. The Hypoglossal Nerve. Gray, Henry. 1918. Anatomy of the Human Body.
794, 795) is the motor nerve of the tongue.
The rootlets of this nerve are collected into two bundles, which perforate the dura mater separately, opposite the hypoglossal canal in the occipital bone, and unite together after their passage through it; in some cases the canal is divided into two by a small bony spicule.
The nerve descends almost vertically to a point corresponding with the angle of the mandible.
www.bartleby.com /107/207.html   (590 words)

 MEEI-Facial Nerve
It ordinarily affects all branches of the nerve, from the forehead to the neck.
Lyme disease is a spirochetal infection caused by the organism Borrelia Burgdorferi.
Usually the state of nerve function and the likelihood of full recovery are dependent on the time of onset of facial nerve symptoms during the course of the ear disease, and the facial nerve paralysis.
www.meei.harvard.edu /facialnerve/face2.php   (2659 words)

 Vagus Nerve Stimulation - neurologychannel
Vagus nerve stimulation involves the implantation of a generator that stimulates the vagus nerve and thus reduces seizure activity.
The vagus nerve is one of 12 pairs of cranial nerves (i.e., nerves that originate in the brain).
Stimulation of the vagus nerve is thought to affect some of its connections to areas in the brain that are prone to seizure activity.
www.neurologychannel.com /vagus   (514 words)

 Pinched Nerve
Nerves passing over a rigid prominence, such as a bone, are particularly vulnerable.
The most typical pinched nerves are the median, ulnar and radial nerves, which extend down the arms from the shoulders to the hands.
Pressure on a peripheral nerve from the surrounding tissue causes inflammation of the nerve.
www.webmd.com /content/pages/4/1661_50313.htm   (618 words)

 Emergency Preparedness and Response: Safety and Health Guides - Nerve Agents
Nerve agents are highly toxic chemicals called "organophosphates" that poison the nervous system and disrupt bodily functions which are vital to an individual’s survival.
Nerve agents, depending on their purity, are clear and colorless or slightly colored liquids and may have no odor or a faint, sweetish smell.
When a person is exposed to a nerve agent, the nerve agent, upon entering the body, inhibits the normal actions of acetylcholinesterase; a chemical within the body whose normal function it is to break down the chemical acetylcholine.
www.osha.gov /SLTC/emergencypreparedness/guides/nerve.html   (1955 words)

 ATSDR - ToxFAQs™: Nerve Agents (GA, GB, GD, VX)
Nerve agents are highly toxic regardless of the route of exposure.
Most of the nerve agents were originally produced in a search for insecticides, but because of their toxicity, they were evaluated for military use.
Regardless of the route of exposure, the manifestation of nerve agent exposure includes runny nose, chest tightness, pinpoint pupils, shortness of breath, excessive salivation and sweating, nausea, vomiting, abdominal cramps, involuntary defecation and urination, muscle twitching, confusion, seizures, paralysis, coma, respiratory paralysis, and death.
www.atsdr.cdc.gov /tfactsd4.html   (1236 words)

 ScienceDaily: Scientists Coax Nerve Fibers To Regrow After Spinal Cord Injury
This is in part because nerves in the brain and spinal cord, unlike those in the rest of the body, fail to grow new nerve fibers.
Nerves in the brain and spinal cord are surrounded by signals from other cells in the injured area that stop them from growing.
The researchers surgically severed nerves that normally extend from the spinal cord to the shoulder of anesthetized rats.
www.sciencedaily.com /releases/2006/07/060718073559.htm   (1302 words)

 MEI: Facial Nerve Paralysis Patient Brochure
As such, a disorder of the facial nerve may result in twitching, weakness or paralysis of the face, dryness of the ear or the mouth, loss of taste, increased sensitivity to loud sound and pain in the ear.
It may occur, however, when the nerve is not in its normal anatomical position (congenital abnormality) or when the nerve is so distorted by the mastoid or middle ear disease that it is not identifiable.
A skin sensation nerve is removed from the neck and transplanted into the ear bone to replace the diseased portion of the facial nerve.
www.michiganear.com /library/brochures/facial   (2658 words)

 Nerve Agents
Binary technology implies that the final stage in the synthesis of the nerve agent is moved from the factory into the warhead, which thus functions as a chemical reactor.
In the presence of nerve agent the enzyme acetylcholinesterase, which is responsible for breaking down acetylcholine, is inhibited.
The reaction mechanism for nerve agents is similar but with the important difference that the rate of the final, hydrolyzing step is negligible.
www.opcw.org /resp/html/nerve.html   (3591 words)

 Nerve Agents
Nerve agents acquired their name because they affect the transmission of nerve impulses in the nervous system.
Nerve agents are more or less fat-soluble and can penetrate the outer layers of the skin.
Consequently, death caused by nerve agents is a kind of death by suffocation.
www.nbcdefence.net /nore/nerve.htm   (3595 words)

 Nerve injuries
Nerves are the "electrical wiring" system in all people that carry messages from the brain to the rest of the body.
When nerve fibers are cut, the end of the fiber farthest from the brain dies, while the insulation stays healthy.
If both the nerve and insulation have been cut and the nerve is not fixed, the growing nerve fibers may grow into a ball at the end of the cut, forming a nerve scar or neuroma.
orthoinfo.aaos.org /brochure/thr_report.cfm?thread_id=49&...   (764 words)

 Sciatica: What You Need to Know About Sciatica - Spine-health.com
Sciatic pain is caused when a nerve root in the lower spine is pinched or irritated, and is commonly caused by a lumbar herniated disc, spinal stenosis, degenerative disc disease or spondylolisthesis.
True sciatica occurs when the sciatic nerve is pinched or irritated and the pain along the sciatic nerve is caused by this nerve (radicular pain).
Sciatica nerve pain is caused by a combination of pressure and inflammation on the nerve root, and treatment is centered on relieving both of these factors.
www.spine-health.com /topics/cd/d_sciatica/sc01.html   (796 words)

 Vagus nerve definition - Medical Dictionary definitions of popular medical terms
Vagus nerve: A remarkable nerve that supplies nerve fibers to the pharynx (throat), larynx (voice box), trachea (windpipe), lungs, heart, esophagus, and the intestinal tract as far as the transverse portion of the colon.
The vagus nerve is the tenth cranial nerve.
Damage to the recurrent laryngeal nerve can result from diseases inside the chest (intrathoracic diseases) such as a tumor or an aneurysm (ballooning) of the arch of the aorta or of the left atrium of the heart.
www.medterms.com /script/main/art.asp?articlekey=7631   (443 words)

 MEEI-Facial Nerve Disorders
When the nerve impulses to the facial nerve are interrupted, any or all of these functions may be affected.
These can be followed when the status of the nerve is known, though occasionally the status of the nerve is not known at the conclusion of surgery, making management of the resulting facial paralysis difficult.
For this reason, some doctors feel that facial nerve decompression is indicated since it appears to decrease the severity of the facial paralysis in subsequent episodes.
www.meei.harvard.edu /facialnerve/face.php   (1141 words)

 Nerve Blocks
Nerve blocks can be used, in some cases, to avoid surgical options.
This is a network of nerves extending the length of the spine.
It is performed to determine if there is damage to the sympathetic nerve chain supplying the head, neck, chest, and arms, and if it is the source of the patient’s pain in those areas.
clevelandclinic.org /health/health-info/docs/3600/3690.asp?index=12090   (506 words)

 BSL PRO Lesson A03 - CAP: Nerve Conduction
The frog sciatic nerve is essentially a bundle of hundreds of individual nerve fibers (axons and long dendrites) bound by connective tissue.
When the sciatic nerve is dissected, the connection between each nerve cell body and its effector or receptor is severed.
Depending on the length of the nerve, you may need to reposition the "R+" lead such that it is connected to the pin that is closest to the end of the nerve, yet clearly in contact with it.
www.biopac.com /bslprolessons/a03/bslproa03.htm   (2918 words)

 Introduction: Optic Nerve Disorders: Merck Manual Home Edition
A common cause of damage to the optic nerve is a tumor of the pituitary gland that presses on the nerve.
For instance, if the optic nerve is damaged somewhere between an eyeball and the optic chiasm, the person may become blind in only that eye.
In hemianopia, damage farther back in the optic nerve pathway (which is often the result of a stroke or a tumor) produces yet another pattern of vision loss.
www.merck.com /mrkshared/mmanual_home2/sec20/ch235/ch235a.jsp   (365 words)

 > products  > nerve   (Site not responding. Last check: 2007-09-30)
The Nerve is the apex of grace and power.
Skeptics have claimed the Nerve to be a hoax or a replacement Impulse.
The Nerve is designed to be a no-upgrades-necessary implement of victory.
www.smartparts.com /Products/Nerve.aspx   (329 words)

 Sciatic Nerve and Sciatica
The sciatic nerve is the longest and largest nerve in the body measuring three-quarters of an inch in diameter.
If the nerve is compressed, caused by conditions such as a bulging or herniated disc or tumor (rare), symptoms may include a loss of reflexes, weakness and numbness besides severe pain.
The peroneal nerves originate from the nerve roots at the fourth and fifth lumbar spine (L4-5) and first and second levels of the sacrum (S1-2).
www.spineuniverse.com /displayarticle.php/article2524.html   (465 words)

 [No title]
If you have a Nerve.com membername and password but can't log in to Nerve Personals, this most likely means that you do not have a Nerve Personals account.
Contact Nerve Customer Service and send us a note telling us that you have a membername and password but no Personals account and we will help you to set one up.
If you have both a Nerve membername/password and a Nerve Personals handle/password combination but they are different, please contact the Nerve Customer Service staff by CLICKING HERE.
personals.nerve.com   (203 words)

 Pinched Nerve Information Page: National Institute of Neurological Disorders and Stroke (NINDS)
The term pinched nerve describes one type of damage or injury to a nerve or set of nerves.
One of the most common examples of a single compressed nerve is the feeling of having a foot or hand "fall asleep." Pinched nerves can sometimes lead to other conditions such as peripheral neuropathy, carpal tunnel syndrome, and tennis elbow.
Pinched nerve is a common cause of on-the-job injury.
www.ninds.nih.gov /disorders/pinchednerve/pinchednerve.htm   (346 words)

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