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Topic: Lumbar nerve

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Spinal discal hernia When in the neck, cervical discal hernia may produce the so called"Cervical-Brachial Neuralgias" (neck, shoulders and hernia-sidearm pain) and if lumbar, hernias produce sciatica or lumbo-sciatica, thatis pain in the low-back that spreads to the leg on the hernia side. As in the lumbar and thoracicspine, herniation ofthe contents of an intervertebral disc may occur when a tear occurs inthe annulus fibrosus that surrounds the disc. Those protrusions ordiscal hernias compress the nerve roots in the spine that lead to the armsand legs. www.daher.com.ve /in_hd.shtml

Lumbar Disc Herniation by Globalspine.net As the weakest spot in a lumbar disc wall is directly under the nerve root, a herniation usually occurs back into the spinal canal and puts direct pressure on the nerve caused the spinal nerve inflammation and swelling. As nerves in lumbar section of the spine are exiting from the spinal cord between the vertebras and then join together again to form the Most herniated discs occur in the lumbar section of the spine and about 90% of them will occur at its lower levels such as L4- L5 (lumbar segments 4 and 5) or L5- S1 (lumbar segment 5 and sacral segment 1). globalspine.net /lumbar_disc_herniation.html

Sciatica and the sciatic nerve The nerve that exits between lumbar segment 4 and lumbar segment 5 (L4 and L5) is called the L4 nerve root, and the nerve that exits between the L5 and Sacral segment 1 is called the L5. The sciatic nerve is the largest single nerve in the human body; it runs from each side of the lower spine through deep in the rear and back of the thigh, and all the way down to foot, connecting the spinal cord with the leg and foot muscles. The five nerves group together on the front surface of the piriformis muscle (in the rear) and become one large nerve - the sciatic nerve. www.spine-health.com /topics/cd/sciatica/sciatic_nerve01.html   (812 words)

Sciatica and the sciatic nerve The nerve that exits between lumbar segment 4 and lumbar segment 5 (L4 and L5) is called the L4 nerve root, and the nerve that exits between the L5 and Sacral segment 1 is called the L5. The sciatic nerve is the largest single nerve in the human body; it runs from each side of the lower spine through deep in the rear and back of the thigh, and all the way down to foot, connecting the spinal cord with the leg and foot muscles. The tibial nerves continue to travel downward towards the feet and innervate the heel and sole of the foot. www.spine-health.com /topics/cd/sciatica/sciatic_nerve01.html   (812 words)

Anatomical Models - Vertebrae Functional model of the 5 lumbar vertebrae, coccyx and sacrum with removable cutaway. Functional model of the 12 thoracic vertebrae, intervertebral discs and nerve branches. Natural size 4th and 5th lumbar vertebrae have 3 interchangeable discs. www.chirocliniconline.com /acc/vertebrae.htm   (298 words)

Virtual Hospital: Illustrated Encyclopedia of Human Anatomic Variation: Opus III: Nervous System: Spinal Nerves and Ganglia Ganglia aberrantia (small detached portions of spinal ganglia) may be found along the posterior roots of the upper cervical, lumbar, and sacral spinal nerves. The dorsal root ganglia associated with any one of the lumbar or upper sacral spinal nerves may be doubled. The spinal ganglion and sensory root of the coccygeal nerves may be absent; the same may occur to a lesser degree in other spinal nerves. www.vh.org /adult/provider/anatomy/AnatomicVariants/NervousSystem/Text/SpinalNervesGanglia.html   (418 words)

Lumbar herniated disc Approximately 90% of disc herniations will occur at L4- L5 (lumbar segments 4 and 5) or L5- S1 (lumbar segment 5 and sacral segment 1), which causes pain in the L5 nerve or S1 nerve, respectively. Using microsurgical techniques (a small operation using a microscope) to treat a lumbar herniated disc, a microdiscectomy can usually be done on an outpatient basis or with an overnight stay in the hospital, and most patients can return to work full duty in one to three weeks. As a disc degenerates, it can herniate (the inner core extrudes) back into the spinal canal, which is known as a disc herniation. www.spine-health.com /topics/cd/overview/lumbar/young/lum01.html   (418 words)

Treatment options for lumbar herniated disk, by Spine-Health A lumbar herniated disk usually causes leg pain (sciatica or a radiculopathy) and is often referred to as a pinched nerve, bulging disk, ruptured disk, or a slipped disk. For those patients with severe pain that is not responsive to conservative treatment, surgery to decompress the nerve is a reasonable option to treat the lumbar herniated disk. If conservative treatment for the lumbar herniated disk does not provide pain relief after 6 to 12 weeks it is reasonable to consider surgery. www.spine-health.com /topics/conserv/lumbar/lumb01.html   (418 words)

Lumbar Disc Disease Lumbar disc disease is characterized by a bulge or rupture of the disc material into the spinal canal, which causes abnormal pressure on the nerve at that level, leading to symptoms in the back and one leg or foot. Because the front and back of the disc space are reinforced by ligaments, most protrusions occur to either side and press on the nerve instead of the spinal cord, which is why symptoms mainly occur in only one leg. Disc disease frequently starts with degeneration of the disc material, causing a loss of vertebral body height, and placing more stress on the already weakened disc material. www.healthsystem.virginia.edu /internet/neurosurgery/sections/ldisc.cfm   (371 words)

Back.com - Causes - Mechanical Disorders - Degenerative Disc Disease When degenerative disc disease becomes painful or symptomatic, it can cause several different symptoms, including back pain, leg pain, and weakness that are due to compression of the nerve roots. The combination of damage to the intervertebral discs, the development of bone spurs, and a gradual thickening of the ligaments that support the spine can all contribute to degenerative arthritis of the lumbar spine. However, not everyone who has degenerative changes in their lumbar spine has pain. www.back.com /causes-mechanical-degenerative.html   (824 words)

UCLA NEUROSURGERY Spinal Disorders & Diseases The symptoms of a herniated lumbar disc are dependent upon the nerve roots that are compressed. The mainstay of therapy for herniated lumbar disc is conservative treatment, that is, nonsurgical. Specific nerve roots supply a group of muscles and a dermatomal skin sensory distribution. www.neurosurgery.medsch.ucla.edu /Diagnoses/Spinal/SpinalDis_3.html   (852 words)

Lumbar Herniated Disc In between each of the five lumbar vertebrae (bones) is a disc, a tough fibrous shock-absorbing pad. Sciatica is a symptom frequently associated with a lumbar herniated disc. Pressure on one or several nerves that contribute to the sciatic nerve can cause pain, burning, tingling, and numbness that extends from the buttock into the leg and sometimes into the foot. www.spineuniverse.com /displayarticle.php/article28.html   (384 words)

IX. Neurology. 6d. The Lumbosacral Plexus. Gray, Henry. 1918. Anatomy of the Human Body. cutaneus femoralis lateralis; external cutaneous nerve) arises from the dorsal divisions of the second and third lumbar nerves. The articular branch to the hip-joint is derived from the nerve to the Rectus femoris. net-work (subsartorial plexus) with branches of the saphenous and obturator nerves. www.bartleby.com /107/212.html   (2858 words)

Autonomic nervous system - Wikipedia, the free encyclopedia The Thoracolumbar Sympathetics - The thoracolumbar sympathetic fibers arise from the dorso-lateral region of the anterior column of the gray matter of the spinal cord and pass with the anterior roots of all the thoracic and the upper two or three lumbar spinal nerves. The Sympathetic Efferent Fibers of the Vagus Nerve are supposed to arise in the dorsal nucleus (nucleus ala cinerea). The Sympathetic Afferent Fibers of the Glossopharyngeal Nerve are supposed to arise either in the dorsal nucleus (nucleus ala cinerea) or in a distinct nucleus, the inferior salivatory nucleus, situated near the dorsal nucleus. en.wikipedia.org /wiki/Autonomic_nervous_system   (3139 words)

Peripheral nervous system - Wikipedia, the free encyclopedia In humans, there are 31 pairs of spinal nerves: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral and 1 coccygeal. suprascapular nerve is an early branch of the superior trunk. The first 4 cervical spinal nerves, C1 through C4, split and recombine to produce a variety of nerves that subserve the neck and back of head. en.wikipedia.org /wiki/Peripheral_nervous_system   (3139 words)

Peripheral nervous system - Wikipedia, the free encyclopedia In humans, there are 31 pairs of spinal nerves: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral and 1 coccygeal. The first 4 cervical spinal nerves, C1 through C4, split and recombine to produce a variety of nerves that subserve the neck and back of head. The brachial plexus first forms three trunks, the superior trunk, composed of the C5 and C6 nerve roots, the middle trunk, made of the C7 nerve root, and the inferior trunk, made of the C8 and T1 nerve roots. en.wikipedia.org /wiki/Peripheral_nervous_system   (3139 words)

IX. Neurology. 6. The Spinal Nerves. Gray, Henry. 1918. Anatomy of the Human Body. The roots of the lower lumbar and upper sacral nerves are the largest, and their individual filaments the most numerous of all the spinal nerves, while the roots of the coccygeal nerve are the smallest. The dendrites of the multipolar nerve cells form synapses around the cells of type II (cells of Dogiel) in the spinal ganglia, and by this path the original impulse is transferred from the sympathetic to the somatic system, through which it is conveyed to the sensorium. The Spinal Ganglia (ganglion spinale) are collections of nerve cells on the posterior roots of the spinal nerves. www.bartleby.com /107/208.html   (1334 words)

THE MERCK MANUAL, Sec. 14, Ch. 178, Neuro-Ophthalmologic And Cranial Nerve Disorders Thus 6th nerve palsies may be due to large brain tumors remote from the nerve, to increased intracranial pressure, or to lumbar puncture. One identifiable cause is compression of the 6th nerve in the cavernous sinus by a tumor originating in the nasopharynx. The mechanism presumably involves swelling of the nerve due to immune or viral disease, with ischemia and compression of the facial nerve in the narrow confines of its course through the temporal bone. www.merck.com /mrkshared/mmanual/section14/chapter178/178c.jsp   (1334 words)

Lecture Outline 17 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. Nerves are structures that contain bundles of fibers; sensory nerves contain long dendrites, motor nerves contain long axons, and mixed nerves contain both. Nerve impulse causes presynaptic membrane to open channels to calcium ions that interact with actin filaments that pull synaptic vesicles to membrane. www.tc.cc.tx.us /~mstorey/1409/notes/lecture17.html   (1855 words)

EMG & Nerve Conductions Electronic EMG Manual : Findings in certain disease entities For the lumbar plexus, the L2 to L4 nerve roots can be stimulated by using a needle electrode inserted 2-3 cm laterally to the L4 spinous process and the response recorded from the quadriceps. Changes in motor nerve conductions begin with a decrease in the amplitude of the motor response, due to the loss of axons, then prolongation of latency, and a tendency to slowed motor conduction velocities as a result of the loss of the fastest conducting fibers. In routine nerve conduction testing, we only test the median and ulnar motor response in the arm; therefore only C8 and T1 radiculopathies would be picked up unless special studies to the radial nerve or the brachial plexus are performed. www.teleemg.com /new/jbr090.htm   (1248 words)

Medullary respiratory neurones and control of laryngeal motoneurones during fictive eupnoea and cough in the cat -- Baekey et al. 534 (2): 565 -- The Journal of Physiology Online Phrenic, lumbar and recurrent laryngeal nerve discharges were integrated with a leaky resistor-capacitor circuit (0.2 s time constant) and recorded on a polygraph to monitor the effectiveness of the stimuli to elicit cough. Averages of recurrent laryngeal nerve efferent activity, triggered by spikes in each simultaneously recorded neurone, were screened for features that identified the cell as either a laryngeal motoneurone or a neurone with functional links to motoneurones. Offset primary peaks in rectified averages of recurrent laryngeal nerve activity triggered by neurones with augmenting, decrementing and plateau inspiratory discharge patterns are consistent with a model in which these 'types' of neurone have excitatory premotor actions on inspiratory laryngeal motoneurones. jp.physoc.org /cgi/content/full/534/2/565   (1248 words)

Herniated Lumbar Disc Mayfield Clinic Most herniated discs occur in the lumbar section of the spine, where nerves from the spinal cord exit between the lumbar vertebrae and then join together again to form the sciatic nerve, which runs down your leg. Lumbar disc herniation is one of the most common causes of lower back pain associated with leg pain, and occurs 15 times more often than cervical (neck) disc herniation. vertebra: (plural vertebrae): one of 33 bones that form the spinal column, they are divided into 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal. www.mayfieldclinic.com /PE-HLDisc.htm   (2390 words)

LOW BACK PAIN - ANATOMY Disc herniations in the lumbar spine are the most common causes of "sciatica", meaning pain running down the back of the leg in the area of the sciatic nerve. Because the lumbar vertebrae are located between the pelvis and upper torso, the degree of stresses endured by the lumbar spine are great. The lumbar discs connect adjacent lumbar vertebrae to one another and cushion the spine as well as permit motion between the individual vertebrae. www.dcdoctor.com /pages/rightpages_healthconditions/lowbackpain/lbp_anatomy.html   (624 words)

back.html Likewise, the posterior protrusion of a herniated lower lumbar intervertebral disc, while not pressing on the spinal cord, can compress a lumbar nerve root, causing severe pain or physical dysfunction in distinct areas of the lower limb. Lumbar vertebrae are characterized by massive bodies and robust spinous and transverse processes. It attaches to lumbar and inferior thoracic transverse processes (longissimus dorsi) and in the thoracic region to the adjacent ribs (longissimus thoracis). www.emory.edu /ANATOMY/AnatomyManual/back.html   (2141 words)

LUMBAR SPINAL STENOSIS Since spinal stenosis is a narrowing of the bony canal, the goal of the surgery is to open up the bony canal to improve available space for the nerves. These are injections of corticosteroid into the epidural space (the area in the spinal canal surrounding the spinal nerves) or facet joints performed by a doctor with special training in this technique. If your doctor determines that lumbar spinal stenosis is causing your pain, he or she will usually try nonsurgical treatments at first. www.spine.org /articles/lumbarspinalstenosis.cfm   (1327 words)

AMA (Atlas) Nervous System -- Groups of Nerves The four groups of nerves that branch from the cervical, thoracic, lumbar, and sacral regions of the spinal cord are called the peripheral nerves. The spinal cord is a cylinder of nerve tissue that runs down the center canal in the spine. These nerves (five pairs) supply the thighs and lower parts of the legs, the feet, most of the external genital organs, and the area around the anus. www.ama-assn.org /ama/pub/category/7173.html   (266 words)

SPINAL MOTOR STRUCTURES However, the cord can be divided into segments by the nerve roots that come off of it; although the rootlets branch off nearly continuously, they coalesce into about 31 discrete nerves along the cord (8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal nerves). There are two types of nerve endings wrapped around this intrafusal fiber, both of which monitor its degree of stretch - as the muscle stretches, so does this capsule within it. Although we usually study the spinal cord as a series of cross sections, it is important to remember that it is in fact a column, with continuous tracts and cell columns. thalamus.wustl.edu /course/spinal.html   (1662 words)

Sciatic Nerve Treatment This large nerve is formed from the lower segments of the spinal cord; it is made up from the lumbar and sacral nerve roots from the spinal cord. The sciatic nerve exits the lower part of the spinal cord (lumbosacral region), passes behind the hip joint, and runs down the back of the thigh. The sciatic nerve, like most other nerves, performs two basic functions: 1st, it sends signals to your muscles from the brain; and 2end, it collects sensory information from the legs and passes this back to your brain. www.sacredrose.net /sciatic_nerve_treatment.htm   (359 words)

8rc2 The sciatic nerve is comprised of the anterior branches of the ventral ramie of the fourth and fifth lumbar nerves and the first, second and third sacral roots via the lumbosacral plexus. Also of importance is that; (1) the sciatic nerve is the largest nerve in the body, (2) proximal and medial to the sciatic nerve is the gluteal artery and 3) the posterior projection of the femoral nerve is on the sciatic nerve. Among the factors contributing to the choice of a specific approach for sciatic nerve block are patient mobility (obesity, arthritis, trauma) and comfort, surgical requirements the use of a tourniquet and indications for a catheter for a continuous block. www.euroanesthesia.org /education/rc_nice/8rc2.html   (1977 words)

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