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Topics related to "ganglion"

parasympathetic nervous system
parasympathetic nervous system That part of the autonomic nervous system which generally causes bodily functions to become appropriate for calm conditions, for instance by slowing down the heart rate and promoting digestion. Nerves of the parasympathetic nervous system tend to form ganglia (ganglion... Read more
sympathetic nervous system
sympathetic nervous system That part of the autonomic nervous system which generally acts to stimulate the body to cope with stress, such as increasing the rate of heart beat. Nerves of the sympathetic nervous system tend to form ganglia (ganglion) beside the vertebrae, preganglionic fibres leading ... Read more
herpes zoster
herpes zoster infection of a ganglion (nerve center) with severe pain and a blisterlike eruption in the area of the nerve distribution, a condition called shingles. The causative organism is varicella zoster, a common, filtrable virus that is also known to cause chicken pox. Herpes zoster usually a... Read more
earthworm
earthworm terrestrial, cylindrical segmented worm of the class Oligochaeta. There are 2,200 earthworm species, found all over the world except in arid and arctic regions and ranging in size from 1 in. (2.5 cm) to the 11-ft (330-cm) giant worms of the tropics. Some earthworms are pallid in color, ma... Read more
nervous system
nervous system network of specialized tissue that controls actions and reactions of the body and its adjustment to the environment. Virtually all members of the animal kingdom have at least a rudimentary nervous system. Invertebrate animals show varying degrees of complexity in their nervous system... Read more
Peripheral Nervous System
Peripheral Nervous System The peripheral nervous system (PNS) refers to all the neurons (and their supporting cells, or glia) of the body outside the brain and spinal cord (central nervous system [CNS]). The brain is the organ that decides how a person responds to what happens in the surrounding ... Read more
brain
brain the supervisory center of the nervous system in all vertebrates. It also serves as the site of emotions, memory, self-awareness, and thought. Anatomy and Function Occupying the skull cavity (cranium), the adult human brain normally weighs from 2 1/4 to 3 1/4 lb (1-1.5 kg).... Read more
Arthropoda
Arthropoda [Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans , insects , centipedes , millipedes , symphylans, pauropodans, and the extinct trilobites . Arthropods are characterized by a segmented body covered by a jointed external skeleton (exoske... Read more
Annelida
Annelida [Lat., anellus =a ring], phylum of soft-bodied, bilaterally symmetrical (see symmetry, biological ), segmented animals, known as the segmented, or annelid, worms. Over 12,000 known species are grouped in three classes: the earthworms and freshwater worms (oligochaetes), the leeches (... Read more

Encyclopedia entries related to "ganglion"

Ganglion Cyst Removal
Encyclopedia entry from: Gale Encyclopedia of Surgery: A Guide for Patients and Caregivers Ganglion cyst removal Definition Ganglion cyst removal, or ganglionectomy, is the removal of a fluid...The cyst may also be excised (removed by cutting). Purpose Ganglion cysts are sacs that contain the synovial fluid found in joints...
ganglion
Book article from: The Columbia Encyclopedia, Sixth Edition ganglion see nervous system .
Adie's Pupil
Encyclopedia entry from: Gale Encyclopedia of Alternative Medicine ...problem may be located at the ciliary ganglion, a kind of nerve junction structure...body — through the ciliary ganglion, and results in a re-shaping of the...damage to or degeneration of the ciliary ganglion or the ciliary body. The affected eye...
Cyst
Encyclopedia entry from: Complete Human Diseases and Conditions ...the central canal of the spinal cord Ganglion (GANG-lee-on) cysts usually develops...x201C; Bible Bumps ” Ganglion cysts of the wrist used to be called...bumps. ” The home remedy for ganglion cysts used to be rupturing them by hitting...
chemoreceptor
Book article from: The Oxford Companion to the Body ...during the eighteenth century. At first called a ‘ganglion’, it was later thought to be a gland. It was not...vessels and capillaries, nerve fibres, and a few autonomic ganglion cells. Type I cells, of whi
Cochlear Implants
Encyclopedia entry from: Gale Encyclopedia of Surgery: A Guide for Patients and Caregivers ...movement of these hair cells stimulates nerve cells called ganglion cells that send an electrical current to the auditory nerve...electrodes, depending on the type of the implant, stimulate the ganglion cells in the cochlea. These cells transmit the signals to...
Hirschsprung's Disease
Encyclopedia entry from: Gale Encyclopedia of Children's Health: Infancy through Adolescence ...is caused when certain nerve cells (called parasympathetic ganglion cells) in the wall of the large intestine (colon) do not...x2013; 5 percent have cardiac defects. For persons with a ganglion growth beyond the sigmoid segment of the colon, the inheritance...
Sympathectomy
Encyclopedia entry from: Gale Encyclopedia of Surgery: A Guide for Patients and Caregivers ...Diagnosis/Preparation A reversible block of the affected nerve cell (ganglion) determines if sympathectomy is needed. This procedure interrupts nerve impulses by injecting the ganglion with a steroid and anesthetic. If the block has a positive effect...
nicotine
Book article from: The Oxford Companion to the Body ...blood pressure, and reduction in gut motility and digestive functions. Because the adrenal medulla is a modified sympathetic ganglion — with secretion normally stimulated by acetylcholine — adrenaline and noradrenaline are released by the...
nervous system
Book article from: The Columbia Encyclopedia, Sixth Edition ...fibers; a nerve is a bundle of nerve fibers; a cluster of nerve cell bodies (neurons) on a peripheral nerve is called a ganglion. Neurons are located either in the brain, in the spinal cord, or in peripheral ganglia. Grouped and interconnected ganglia...

Dictionary entries related to "ganglion"

Gasserian ganglion
Book article from: A Dictionary of Nursing Gasserian ganglion (gas- eer -iăn) n. a ganglion on the sensory root of the trigeminal nerve, deep within the skull. [ J. L. Gasser (1723–65), Austrian anatomist]
ganglion
Book article from: A Dictionary of Zoology ganglion (pl. ganglia) A mass of nervous tissue, usually surrounded by a layer of connective tissue , that contains many nerve cells...
ganglion cell
Book article from: A Dictionary of Biology ganglion cell See retina .
Remak, Robert
Dictionary entry from: Complete Dictionary of Scientific Biography ...x2019; s observations on invertebrate ganglion cells and nerve fibers and by a remark...confirmed that these fibers originate in the ganglion cells. His findings were at first criticized...nerve tissue, and in 1839 discovered ganglion cells in the human heart. This finding...
Lacaze-Duthiers, Félix-Joseph Henri De
Dictionary entry from: Complete Dictionary of Scientific Biography ...attached to the auditor nerve of mollusks is always attached to the cerbroid ganglion and not sometimes to the cerebroid ganglion and not sometimes to the pedal ganglion, as had been previously assumed. Lacaze-Duthiers never married. Especially...
dorsal root
Book article from: A Dictionary of Biology dorsal root The part of a spinal nerve that enters the spinal cord on the dorsal side and contains only sensory fibres. The cell bodies of these fibres form the dorsal root ganglion (see ganglion ), a swelling in the root that lies just outside the cord. Compare ventral root .
rod
Book article from: A Dictionary of Zoology ...humans about 150) are connected by bipolar cells to a single ganglion cell whose axon is a nerve fibre in the optic tract; stimuli...must exceed a threshold before an impulse is discharged by the ganglion cell. Because the contribution of many individual rods is...
Lubbock, Sir John (Lord Avebury)
Dictionary entry from: Complete Dictionary of Scientific Biography ...Darwin-Wallace papers Lubbock ’ s work in micro-anatomy, such as his notice of the irregularity in the central ganglion of Coccus hesperidum, pointed to the high degree of variation in nature. Despite his youth Lubbock was one of the handful...
Levi, Giuseppe
Dictionary entry from: Complete Dictionary of Scientific Biography ...on the spinal ganglia of over fifty vertebrate species, he illustrated the significance of the fenestrated apparatus of the ganglion cells and the size relationships between those cells and the body of the animal. He concluded that the size of neurons is...
retina
Book article from: A Dictionary of Biology ...through the lens stimulates individual rods and cones, which generates nerve impulses that are transmitted through bipolar and ganglion cells to the optic nerve, and hence to the brain, where the visual image is formed. Information can also be transferred...

Related newspaper, magazine, and trade journal articles from HighBeam Research

The meatal ganglion in neoplasia and inflammation of the facial nerve.(CLINICAL NUGGETS)
Magazine article from: Ear, Nose and Throat Journal; 8/1/2008; ; 700+ words ; ...ganglia of the facial nerve--the geniculate ganglion and the meatal ganglion--are well established. (1) They are derived...intermedius of the facial nerve. The geniculate ganglion is located at the geniculate bend, and the meatal...
The celiac ganglion modulates LH-induced inhibition of androstenedione release in late pregnant rat ovaries.(Research)(Clinical report)
Magazine article from: Reproductive Biology and Endocrinology; 12/1/2006; ; 700+ words ; ...work was to study whether the celiac ganglion modulates, via the superior ovarian...noradrenergic stimulation of the celiac ganglion on the ovarian production of the luteotropic...effect of noradrenaline at the celiac ganglion on the anti-steroidogenic effect of...
Microsurgical anatomy of the perigeniculate ganglion area as seen from the middle cranial fossa approach
Magazine article from: The Annals of Otology, Rhinology & Laryngology; 6/1/2003; ; 700+ words ; ...for decompressing the perigeniculate ganglion area of the facial nerve in patients...microsurgical anatomy of the perigeniculate ganglion area of the facial nerve from the point...from the malleus head to the geniculate ganglion, and the distance from the malleus head...
Molecular Responses of the Spiral Ganglion to Aminoglycosides
Magazine article from: The Volta Review; 1/1/2005; ; 700+ words ; ...both the inner ear hair cells and the ganglion cells that give rise to the eighth cranial...uncoupling protein expression and activation. Ganglion Cells in the Inner Ear: Aminoglycoside...aminoglycosides produced damage to inner ear ganglion cells. Following an initial report that...
Electroacupuncture in the treatment of a ganglion of the wrist--a case report.
Magazine article from: Acupuncture in Medicine; 1/1/2006; ; 700+ words ; Abstract A ganglion is a cystic swelling that occurs most...with a large, recurrent dorsal wrist ganglion. After treatment it rapidly disappeared...drainage. Keywords Electroacupuncture, ganglion, wrist. Description of the case The...
Intratendinous ganglion in the extensor tendon of a finger: A case report
Magazine article from: Journal of Orthopaedic Surgery; 12/1/2001; ; 700 words ; ...tendinous tissue around the ganglion. Since enough of the tendon...remained after excision of the ganglion, the surface of the extensor...recurrence. DISCUSSION Although ganglions of the dorsal hand are common, intratendinous ganglion of the extensor tendon...
EFFECT OF COCHLEAR IMPLANTATION ON RESIDUAL SPIRAL GANGLION CELL COUNT AS DETERMINED BY COMPARISON WITH THE CONTRALATERAL NONIMPLANTED INNER EAR IN HUMANS
Magazine article from: The Annals of Otology, Rhinology & Laryngology; 5/1/2005; ; 700+ words ; ...least a minimal number of spiral ganglion cells is essential for successful...to residual populations of spiral ganglion cells has occurred. The purpose...current study was to compare spiral ganglion cell counts in implanted and nonimplanted...
The relative increase in skin temperature after stellate ganglion block is predictive of a complete sympathectomy of the hand / Reply to Ackerman and Ahmad
Magazine article from: Regional Anesthesia and Pain Medicine; 5/1/1999; ; 700+ words ; ...change in skin temperature after stellate ganglion block as a predictor of a complete sympathectomy...guidance been used for each of the stellate ganglion blocks. It would be interesting to know...of a local anesthetic for a stellate ganglion block to ensure that the local anesthetic...
New Approaches to Ganglion Impar Blocks via Coccygeal Joints
Magazine article from: Regional Anesthesia and Pain Medicine; 5/1/2007; ; 700+ words ; ...for the recently published case report of a ganglion impar block performed via a coccygeal-joint approach. As the authors noted, the ganglion impar is a solitary midline ganglion of the sympathetic nervous system, located...
The bilateral effect of stellate ganglion block on the facial skin blood flow
Magazine article from: Regional Anesthesia and Pain Medicine; 7/1/2000; ; 700+ words ; ...It is our hypothesis that stellate ganglion block increases regional blood flow on...is to examine the effect of stellate ganglion block on facial skin blood flow. Methods...laser blood flowmeter before stellate ganglion block and 15 minutes after the block...