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Topic: Horn (anatomy)


  
  Horn (anatomy) Summary
The association of horns with fertility was further encouraged by their phallic shape and symbolic identification with both the rays of the sun and the crescent moon.
In Christian iconography, the foremost association of horns is with devils and demons, although the Virgin Mary is sometimes depicted with the "horns" of the moon.
Horns are, therefore, ideal attributes for evil and libidinous demons, devils, and monsters.
www.bookrags.com /Horn_(anatomy)   (1273 words)

  
  Horn (anatomy) - Wikipedia, the free encyclopedia
A horn is a hollow, pointed projection of the skin of various animals., consisting mainly of keratin as well as other proteins.
True horns are found only among the ruminant artiodactyls, in the families Antilocapridae (pronghorn) and Bovidae (cows, buffaloes, yaks, goats, antelope etc.).
"Horn" buttons are usually made from deer antlers, not true horn.
en.wikipedia.org /wiki/Horn_(anatomy)   (406 words)

  
 Horn - Wikipedia, the free encyclopedia
Horn (Chinese constellation), a constellation in Chinese astronomy
Horn (Netherlands), a village in the municipality of Haelen
Horne (county), a small historic countship of the Holy Roman Empire associated with the village, which was merged into the prince-bishopric of Lüttich
en.wikipedia.org /wiki/Horn   (419 words)

  
 Welfare Implications of Dehorning and Disbudding Cattle
As the horns grow, the cornual diverticulum of the caudal portion of the frontal sinus extends into the most proximal portion of the horn.
Injection of calcium chloride under the horn bud results in necrosis of the horn bud, but its administration without prior sedation and/or local anesthesia is not recommended due to the level of discomfort induced by the procedure.
and trim associated with bruising for carcasses from horned cattle is approximately twice that for carcasses from hornless cattle.
www.avma.org /beta/reference/backgrounders/dehorning_cattle_bgnd.asp   (2551 words)

  
 Neurological Exam: Spinal Cord: Anatomy   (Site not responding. Last check: 2007-10-20)
The features of spinal cord disorders reflect its anatomy and physiology, i.e., ascending sensory tracts, descending motor systems, sensory afferent fibers and the nuclei receiving incoming sensory information, nuclei giving rise to exiting motor fibers, and the reflexes which result from the interaction of all these elements.
b) the anterior and lateral spinothalamic tracts - after synapsing in the nuclei of the dorsal gray horn, pain, temperature and light touch fibers cross in the anterior white commissure to ascend.
b) the lateral vestibulospinal tract (along with the medial reticulospinal tract) helps control the anterior horn cells and are especially important in the reflex control of skeletal muscle.
isc.temple.edu /neuroanatomy/lab/lesions/1.htm   (347 words)

  
 Knee module: Ligaments and menisci: Collateral ligaments   (Site not responding. Last check: 2007-10-20)
Its anterior horn attaches to the anterior intercondylar area of the tibia, anterior to the attachment of the ACL.
Its anterior horn attaches anterior to the intercondylar eminence, posterolateral to the ACL.
Its posterior horn attaches posterior to the intercondylar eminence, anterior to the posterior horn of the medial meniscus.
www.dartmouth.edu /~anatomy/knee/ligaments/ligamen3.html   (234 words)

  
 [No title]   (Site not responding. Last check: 2007-10-20)
Monodontidae: Narwhals have a single long tusk, a modified tooth, which looks like a horn, and is spiralled like that of the fictional unicorn.
Wildlife have a variety of uses for horns and antlers, including fighting attacking predators and fighting members of their own species for territory, dominance and mating priority.
Since horns are an extension of the skin, they have blood vessels in them, allowing the horns to function as a radiator to cool the blood.
stron.frm.pl /wiki.php?title=Horn_(anatomy)   (581 words)

  
 Horn (animal anatomy) - Search Results - MSN Encarta   (Site not responding. Last check: 2007-10-20)
Horn (animal anatomy), one of the hard protuberances that grows from the foreheads or snouts of various hoofed mammals, such as rhinoceroses, deer,...
Animal : anatomy and physiology : horns: Keratin
Comparative Anatomy, antlers, baleen, body temperature, bones, composition of, brain, cartilage, cells, chart comparing brain sizes of various...
encarta.msn.com /Horn_(animal_anatomy).html   (131 words)

  
 Horn (anatomy)   (Site not responding. Last check: 2007-10-20)
Horn (anatomy), one of the hard protuberances that grows from the foreheads or snouts of various hoofed mammals, such as rhinoceroses,
Horns are generally curved and pointed and serve chiefly as weapons of defense or attack; in some species, only the male is horned.
The horns or antlers of deer are solid bone.
autocww.colorado.edu /~blackmon/E64ContentFiles/AnatomyAndPhysiology/Horn(anatomy).html   (132 words)

  
 Musculoskeletal Reflexes
The dorsal horns (alar plate derivatives) contain neurons which receive incoming sensory fibers in dorsal roots and modify the information brought to them, and either send fibers to local spinal motoneurons for spinal reflex mechanisms or project ascending fibers to higher centers of the nervous system.
The ventral horns contain neurons which may receive fibers directly from dorsal roots or adjacent regions of the spinal cord, or receive long descending fibers from the cortex and brainstem.
The linkage between the upper and lower motor neurons established in the ventral horn enables all higher centers of the brain to coordinate the contraction and relaxation of muscles so that complex behaviors may be produced.
www.med.howard.edu /anatomy/gas/wk3/Lecture10.htm   (2458 words)

  
 Horn hoped attack was 'just a bad nightmare' - TELEVISION - MSNBC.com
Horn was attacked by the 380-pound tiger named Montecore during a live performance at The Mirage hotel-casino.
Horn sustained four deep wounds, including two punctures in the back of his head and two deep cuts on the front of his neck, the doctors said.
Horn, who now uses a motorized wheelchair, was shown undergoing physical therapy — walking, kicking a soccer ball and lifting weights.
www.msnbc.msn.com /id/6019154   (681 words)

  
 eMedicine - Knee, Meniscal Tears (MRI) : Article by Michael R Aiello, MD
It retracts the posterior horn of the LM in flexion and internal rotation, reducing entrapment of the LM between the femur and tibia (Rath, 2000).
The posteromedial horn of the MM and the anterior horn of the MM near the roots may have a normal speckled appearance (see Images 34, 44, and 46).
The normal posterior horn of the LM slopes obliquely upward from lateral to medial, as it ascends from the lateral tibial plateau to its insertion on the posterior tibial eminence.
www.emedicine.com /radio/topic852.htm   (15039 words)

  
 WEAKNESS-
Because the anterior horn cells that innervate different muscles in the upper and lower extremities are present at different segments of the spinal cord, a whole extremity is not presented at a single level.
Because one anterior horn cell/motor axon innervates a number of muscle fibers, it follows that disease of an anterior horn cell or its axon results in denervation of a number of muscle fibers.
With damage to an anterior horn cell or a motor axon the denervated muscle fibers usually become reinnervated by another motor axon with the result that more muscle fibers are innervated by the same anterior horn cell or motor axon in close proximity to the EMG needle.
www.neuroanatomy.wisc.edu /SClinic/Weakness/Weakness.htm   (3584 words)

  
 Rhino Horn Growth
In most cases, the external shape is defined by a bony horn core, and the surface of the horn is only a thin sheath of hardened keratins (the same materials in fingernails and hair).
CT scans and cross-sections of rhino horns show a dense central region that is reinforced by a combination of mineral (calcium) and melanin.
The tissue of rhinoceros horn itself, with its tubules-within-matrix architecture, is very similar to a number of other hardened skin appendages, including the hooves of horses and cattle, whale baleen, and the tips of bird beaks, all of which have evolved this skin architecture independently.
www.oucom.ohiou.edu /dbms-witmer/2006_rhino_horn.htm   (379 words)

  
 GlobalSpine - Advanced Anatomy - Spinal Cord
The anterior horn is short and thick, and does not quite reach the surface, but extends toward the point of attachment of the anterior roots of the nerves.
Thus, the posterior horns are long and narrow in the cervical region; short and narrower in the thoracic; short, but wider, in the lumbar region.
At the base of the posterior horn on its inner side, adjoining the gray commissure is a group of nerve-cells, called Clarke's posterior vesicular column, which extends from the eighth cervical to the second lumbar nerve.
www.globalspine.net /spinal_cord_advanced.html   (4217 words)

  
 Motor > Anatomy
There are also the indirect brainstem motor control centers and their pathways (rubrospinal, vestibulospinal, and reticulospinal) that tonically activate lower motor neurons, especially those that innervate axial and antigravity muscles (those motor neurons that are in the medial part of the ventral horn).
The corticospinal tract has its main influence on the motor neurons that innervate the muscles of the distal extremities- the hand and the foot (motor neurons in the lateral part of the ventral horn).
The corticospinal tract also (and this a key point) has collaterals that modulate and control the indirect brainstem motor centers so that we are not a stiff statue opposing gravity but rather we can move at will and have just the right amount of supporting tone.
library.med.utah.edu /neurologicexam/html/motor_anatomy.html   (536 words)

  
 Anatomy of primary afferents and projection neurones in the rat spinal dorsal horn with particular emphasis on ...
Anatomy of primary afferents and projection neurones in the rat spinal dorsal horn with particular emphasis on substance P and the neurokinin 1 receptor -- Todd 87 (2): 245 -- Experimental Physiology
Anatomy of primary afferents and projection neurones in the rat spinal dorsal horn with particular emphasis on substance P and the neurokinin 1 receptor
The dorsal horn of the spinal cord plays an important role in transmitting information from nociceptive primary afferent neurones to the brain; however, our knowledge of its neuronal and synaptic organisation is still limited.
ep.physoc.org /cgi/content/abstract/87/2/245   (508 words)

  
 Anatomy Atlases: Atlas of Microscopic Anatomy: Section 1 - Cells
Anatomy Atlases is curated by Ronald A. Bergman, Ph.D. Please send us comments by filling out our Comment Form.
"Anatomy Atlases", the Anatomy Atlases logo, and "A digital library of anatomy information" are all Trademarks of Michael P. D'Alessandro, M.D. Anatomy Atlases is funded in whole by Michael P. D'Alessandro, M.D. Advertising is not accepted.
The information contained in Anatomy Atlases is not a substitute for the medical care and advice of your physician.
www.anatomyatlases.org /MicroscopicAnatomy/Section17/Plate17321.shtml   (431 words)

  
 Oxford Caster
The horn is made up of the legs, that surround the wheel, and the base of a swivel caster or the plate or stem of the rigid caster.
The kingpin is the rivet or the threaded stud or bolt that attaches the mounting plate or stem to the caster horn, encasing the ball bearings in their raceways.
The upper raceway is a single roll of balls that allows the swivel horn to rotate in relation to the mounting plate / stem, standard in the single ball raceways.
www.oxfordcaster.com /whatcaster/anatomy.shtml   (644 words)

  
 Hooves of a Horse
On the outside and underneath, they are protected by horn (a form of modified, hardened skin) which grows down from the coronet band, a fleshy ridge around the top of the hoof, equivalent to the cuticle on human nails.
Inside the hoof, the horny outer structures are tightly bonded to the sensitive ones by means of leaves of horn and flesh (called laminae) which interlock around the wall of the hoof.
Horses are shod with metal shoes to prevent them from becoming footsore, but this prevents the horn from being worn down, so the farrier has to trim away excess horn at each shoeing before refitting or replacing the shoes (approximately every 4-8 weeks, depending on the rate of wear or growth).
www.angelfire.com /tx2/kidshorses/hoof.html   (392 words)

  
 Anatomy Atlases: Atlas of Human Anatomy in Cross Section: Section 1. Head and Neck
The floor of the frontal (anterior) horn of the lateral ventricle (3) is seen.
Caudal to the cerebellum is the occipital bone (17) and internal occipital crest (19).
The hippocampus (12) is seen as an invagination of the parahippocampal gyrus (23) into the temporal (inferior) horn of the lateral ventricle (26).
www.anatomyatlases.org /HumanAnatomy/1Section/12.shtml   (601 words)

  
 horn-rims - Search Results - MSN Encarta   (Site not responding. Last check: 2007-10-20)
- glasses with horn frames: spectacles with frames made from dark-coloured horn or a synthetic substance resembling this
Horn (music), class of wind instruments that usually have a conical opening or derive from an animal horn or tusk.
Horn (anatomy), one of the hard protuberances that grows from the foreheads or snouts of various hoofed mammals, such as rhinoceroses, deer,...
uk.encarta.msn.com /horn-rims.html   (113 words)

  
 Hoof Anatomy   (Site not responding. Last check: 2007-10-20)
The external, insensitive part of the hoof comprises the wall (the outer, protective layer of the foot); the sole (a plate of hard horn just under and inch thick; the frog (a wedge-shaped mass of soft elastic horn), and the periople (a thin layer of epidermis between the hoof wall and the skin).
On the ground surface of the sole, where the sole meets the wall, is a narrow band of soft plastic horn knows as the white line.
This white line is of great importance to the farrier because it indicates the position of the sensitive structures of the foot and the thickness of the wall, thus helping determine where nails can be driven into the wall to hold shoes in place without encroaching on the sensitive areas.
www.sahorses.com /Anatomy_of_the_Hoof.html   (364 words)

  
 Anatomy of dinosaurs-dinosaur fossil dinosaur pictures dinosaur activities dinosaur bones dinosaur extinction.
Anatomy of dinosaurs-dinosaur fossil dinosaur pictures dinosaur activities dinosaur bones dinosaur extinction.
that duckbills had, for a change of pattern the horned dinosaurs had large rounded scales with a rosette of polygonal scales making the change back to the basic pattern.The big round scales were more common on the back and sides.
In the horned dinosaurs, they attached to the skull and formed the ornate horns of the frills.
www.rareresource.com /anatomy.htm   (1348 words)

  
 Anatomy Articles - knee part 2
They also have what are known as "horns" and for each meniscus there is both an anterior (front) and posterior (back) horn.
The horn is the rounded end that is facing the middle of the tibia.
One of the largest groups of muscles in the body are the thigh muscles known as the quadriceps (feel free to blow the dust off that old anatomy book and follow along with their pictures), which literally means four heads.
www.yoganatomy.com /article_knee2.html   (1357 words)

  
 Horn Definition / Horn Research   (Site not responding. Last check: 2007-10-20)
horn (anatomy), a hollow, pointed projection of the skinIn zootomy and dermatology, skin is an organ of the integumentary system; which is composed of a layer of tissues that protect underlying muscles and organs.
horn (diacritic), a diacritic mark used to indicate that a normally rounded vowel such as o or u is to be pronounced unroundedIn phonetics, vowel roundedness refers to the amount of rounding in the lips during the articulation of a vowel.
Horn is a passionate gardener who left a mainstream job to co-found Joy Creek Nursery in Seattle Washington.
www.elresearch.com /Horn   (420 words)

  
 Motor > Anatomy   (Site not responding. Last check: 2007-10-20)
There are also the indirect brainstem motor control centers and their pathways (rubrospinal, vestibulospinal, and reticulospinal) that tonically activate lower motor neurons, especially those that innervate axial and antigravity muscles (those motor neurons that are in the medial part of the ventral horn).
The corticospinal tract has its main influence on the motor neurons that innervate the muscles of the distal extremities- the hand and the foot (motor neurons in the lateral part of the ventral horn).
The corticospinal tract also (and this a key point) has collaterals that modulate and control the indirect brainstem motor centers so that we are not a stiff statue opposing gravity but rather we can move at will and have just the right amount of supporting tone.
medstat.med.utah.edu /neurologicexam/html/motor_anatomy.html   (536 words)

  
 Anatomy of Horns / HLCDs - Talk Audio Forums
The compression driver is mounted to the throat of the horn, the tiny air vibrations caused by the diaphram here travel through the horn being amplified on the way (due to the widening of the inside of the horn) till they reach the mouth.
Horns, or Horn Loaded Compression Drivers are a form of transducer most similar to dynamic direct radiating drivers…or cone and dome shaped mids, tweets and woofers to get less technical.
Horns are made of various different materials and come in all shapes and sizes.
www.talkaudio.co.uk /vbb/showthread.php?s=13605e30355d6dc2f85eb282e51539ee&p=808442   (1458 words)

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