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Topic: Sensory organ

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  Organ of Corti - Wikipedia, the free encyclopedia
The organ of Corti is the organ in the inner ear of mammals that contains the auditory sensory cells, the so-called hair cells.
The organ was named after the Italian anatomist Marquis Alfonso Giacomo Gaspare Corti (1822-1876), who conducted microscopic research of the mammalian auditory system from 1849 to 1851 at the Koelliker laboratory in Würzburg (Germany).
In 1851 he was the first to describe the core sensory organ in the mammalian cochlea, the organ of Corti.
en.wikipedia.org /wiki/Organ_of_Corti   (284 words)

 Sensory Systems
The sensory organ of the visual system is the eye which detects and focuses stimuli.
Within the retina are the primary visual sensory cells, the rods and cones.
This is caused by injury to the optic tract, optic radiations or visual cortex.
pathology.mc.duke.edu /neuropath/nawr/sensory.html   (886 words)

 FlyMove - Sensory organs
Chordotonal organs are stretch receptors attached to the basal (inner) surface of the epidermis.
The dorsal pharyngeal organ (dpo) and a dorsal pharyngeal monoscolopidial chordotonal organ (pch1) are both derived from the labral segment.
Sensory neurons of three external sensilla, lh1, lh2 and lp1, and two multidendritic neurons, ltd and lda, flank the pentascolopidial chordotonal organ at its anterior border.
flymove.uni-muenster.de /Organogenesis/NervSys/NSNBSeg/NeuSegSO/NeuSegSOTxt.html   (1596 words)

 Christine Schaefer: Über das JACOBSONsche Organ (Organum vomeronasale) des Hausmeerschweinchens (Cavia aperea ...   (Site not responding. Last check: 2007-10-29)
The Organ of JACOBSON (Organum vomeronasale) in the Guinea Pig (Cavia aperea porcellus LINNE, 1758) -
The organ lies hidden ventromedially in the nasal cavity covered by the mucous membrane of the nasal septum, as in mammals with a secondary palate, and as in all terrestrial vertebrates, it is closely related to the os incisivum or primary palate, respectively, and the septomaxillary bone.
It is concluded that the autonomous Organ of JACOBSON of the terrestrial vertebrates is partially homologous to the olfactory sense organ in fish, which is the phylogenetically primary olfactory sense organ as opposed to the newly-acquired secondary olfactory sense organ of the terrestrial vertebrates, the Regio olfactoria.
library.vetmed.fu-berlin.de /hochschulschriften/1998/81.html   (428 words)

 Sensation -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-29)
The whole sensory system, including both physical sensation and interpretation (or (The psychological result of perception and learning and reasoning) cognition) of information from the senses, is referred to as a (additional info and facts about sensorium) sensorium.
These include the (An oval sensory end organ on the surface of the tongue) taste buds, the sense of touch in the structures of the mouth and digestive system, chemical sensation of irritation in the trigeminal nerve system, and unique receptors for sensing the properties of water located at the rear of the oral cavity.
It is controlled by the action of the fluid or copula inside the (One of three tube loops filled with fluid and in planes nearly at right angles with one another; concerned with equilibrium) Semicircular canals in the ear.
www.absoluteastronomy.com /encyclopedia/s/se/sensation.htm   (703 words)

 Sensory Organ Generation in the Chick Inner Ear -- Wu and Oh 16 (20): 6454 -- Journal of Neuroscience
it is estimated that the first sensory organs to be generated were the superior and posterior cristae at stage 19, followed by the macula sacculi at stage 20, the lateral crista at stage 22, the basilar papilla and lagena at stage 23, the macula utriculi at stage 24, and the macula neglecta at stage 29.
In addition to the BMP4-positive sensory organs as indicated in E and F, BMP4 was also expressed in the mesenchyme surrounding the dorsal portion of the inner ear (E), the tip of the first pharyngeal pouch (arrow in E), and the roof of the ampulla (arrow in F).
The macula neglecta is the smallest of the eight sensory organs.
www.jneurosci.org /cgi/content/full/16/20/6454   (7485 words)

 CMR Institute - Sensory Organs   (Site not responding. Last check: 2007-10-29)
of the sensory organs secondarily or in the course of treating the whole patient, including pediatricians, oncologists, family practice physicians, nurses, and technicians.
In addition, because of the importance of the sensory organs, the impact of other diseases and treatments on their function must often be considered by the physician.
Upon successful completion of this course, the student will be able to describe the anatomy and physiology of the sensory organs; describe common disorders of the sensory organs; and describe the etiology, diagnosis, pharmacology, and terminology related to sensory organ disorders.
www.cmrinstitute.org /SCI427_page.php   (297 words)

 Spatial disorientation - Wikipedia, the free encyclopedia
These sensory illusions occur because flight is an unnatural environment—our senses are not capable of providing reliable signals that we can interpret and relate to our position in three dimensions—without visual reference.
Two otolith organs, the saccule and utricle, are located in each ear and are set at right angles to each other.
These organs are located at the base (vestibule) of the semicircular canals, and their structure consists of small sacs (maculas) covered by hair cell filaments that project into an overlying gelatinous membrane (cupula) tipped by tiny, chalk-like calcium stones called otoconia.
en.wikipedia.org /wiki/Spatial_disorientation   (4737 words)

 [No title]
This inhibition of the stretch reflex is effected by a second sensory organ, the Golgi tendon organ (GTO), situated between the tendon and the muscle.
The sensory component of visceral organs is essentially the same as that of the somatic division, but the motor division is quite different from that of somatic organs and is given a special name: the autonomic nervous system (ANS).
Secondly, parasympathetic ganglia are located in the visceral organs they innervate, e.g., the plexus in the muscularis externa of the alimentary tube, whereas sympathetic ganglia are located near the spinal cord distant from the organ innervated.
www.holycross.edu /departments/biology/whealy/notes_text/bl.text   (1404 words)

 Sensory Organ
Both the internal organs of the autonomic nervous system and the neurons of the somatic-motor nervous system respond specifically to pressure applied to the feet.
Sensory information from the foot is reported to the brain in an orderly manner.
The sensory and motor cortexes reflect the homunculus, the so-called little man, where sensory input and motor output are arranged in a version of the human body.
www.reflexology-research.com /sensory_organ.htm   (1297 words)

 Drosophila tissue and organ development: Peripheral nervous system
Type I sensory organs have been classified into two major groups: first, mechano- or chemosensory organs that have external sensory structures in the cuticle such as bristles, campaniform, and basiconical sensilla (external sensory organs), and second, chordotonal organs that are internally located stretch receptors.
The mechanoreceptive auditory organ of the Drosophila antenna is a large CHO in a2, comprising 150-200 sensory units.
The crinkled (ck) gene of Drosophila encodes myosin VIIa.
www.sdbonline.org /fly/aimorph/pns.htm   (10421 words)

 IngentaConnect The Cephalic Sensory Organ in Pelagic and Intracapsular Larvae of...   (Site not responding. Last check: 2007-10-29)
IngentaConnect The Cephalic Sensory Organ in Pelagic and Intracapsular Larvae of...
The Cephalic Sensory Organ in Pelagic and Intracapsular Larvae of the Primitive Opisthobranch Genus Haminoea (Mollusca: Gastropoda)
The organ, which is present in all species investigated, exhibits the characteristic elements of gastropod CSOs: Two ciliary tuft cells; four to six ampullary cells showing intracellular lumina filled with bundles of tightly packed cilia; three para-ampullary cells interspersed medially and positioned laterally; a modified thickened microvillar border.
www.ingentaconnect.com /content/urban/351/2001/00000240/00000001/art00007   (313 words)

 SCORE Abstract   (Site not responding. Last check: 2007-10-29)
The goal of this research is to elucidate the cellular and molecular processes that underlie sensory organ formation during inner ear development.
Results are expected to provide comparative data about the structure, growth, and genetic profile of three inner ear endorgans: the sacculus (an acoustico-vestibular organ), the utricle (a vestibular organ) and the amphibian papilla (an acoustic organ).
The long term goal of this research is to identify the function of novel genes expressed in the inner ear, and to determine how genes expressed in the inner ear are regulated during development, regeneration, and aging.
taipan.nmsu.edu /neurolab/research/scoreabs.html   (317 words)

 Nervous Systems and Senses
Sensory adaptation is a decrease in sensitivity during continued stimulation.
Mechanoreceptors: sensory neurons stimulated by physical means such as pressure, motion, touch, or stretching','(mechano = an instrument, machine)','../../sounds/bio105/mechanoreceptor.wav')" onMouseOver="window.status='Sensory neurons stimulated by physical means'; return true">Mechanoreceptors, are stimulated by physical means such as touch, pressure, motion, or stretching.
This organ manufactures melatonin in response to darkness, thus the shorter the day (like in winter) the more melatonin is secreted.
biology.clc.uc.edu /courses/bio105/nervous.htm   (2586 words)

 Activity-Dependent Sensitivity of Proprioceptive Sensory Neurons in the Stick Insect Femoral Chordotonal Organ -- ...
Bässler U. Sense organs in the femur of the stick insect and their relevance to the control of position of the femur-tibia-joint.
Büschges A. The physiology of sensory cells in the ventral scoloparium of the stick insect femoral chordotonal organ.
Swerup C, and Rydqvist B. The abdominal stretch receptor organ of the crayfish.
jn.physiology.org /cgi/content/full/88/5/2387   (7544 words)

 Novel, posterior sensory organ in the trochophore larva of Phyllodoce maculata   (Site not responding. Last check: 2007-10-29)
Novel, posterior sensory organ in the trochophore larva of Phyllodoce maculata
Novel, posterior sensory organ in the trochophore larva of Phyllodoce maculata (Polychaeta)
These methods were utilized to describe a novel transitory posterior sensory organ in the trochophore larva of marine polychaet worms.
www.pubs.royalsoc.ac.uk /bio_let_content/abstracts/nezlin.htm   (137 words)

 The role of Math1 in inner ear development: Uncoupling the establishment of the sensory primordium from hair cell fate ...
cells that is characteristic of the mature organ of Corti (Fig.
organ of Corti arise from this postmitotic cell population.
It is this process of convergent extension that is proposed to partly underlie the postmitotic longitudinal (Z axis) growth of the organ of Corti between E13.5 and E17.5 (see Fig.
dev.biologists.org /cgi/content/full/129/10/2495   (7846 words)

 A conserved developmental program for sensory organ formation in Drosophila melanogaster - Nature Genetics   (Site not responding. Last check: 2007-10-29)
Different sensory organs, such the eye and ear, are widely thought to have separate origins, guided by distinct organ-specific factors that direct all aspects of their development.
But diverse sensory organs might instead arise by segment-specific modification of a developmental program that is involved more generally in sensory organ formation.
melanogaster segment-specific sensory organs form through the integration of decapentaplegic (dpp), wingless (wg) and ecdysone signals into a single cis-regulatory element of ato.
www.nature.com /cgi-taf/DynaPage.taf?file=/ng/journal/v36/n3/abs/ng1308.html&dynoptions=doi1081462084   (420 words)

 Wasp, the Drosophila Wiskott-Aldrich Syndrome Gene Homologue, Is Required for Cell Fate Decisions Mediated by Notch ...
In contrast, in mature sensory organs at 30 h APF (B and G) the wild-type four-cell formations (visualized with anti-Ct) give way to abnormal clusters in the mutant.
The sensory organs of the embryonic peripheral nervous
The positions of the sensory organs that were followed by time-lapse microscopy are denoted by dashed circles on images of cuticular preparations of the eclosed wild-type (J) and Wsp mutant (T) adults.
www.jcb.org /cgi/content/full/152/1/1   (8249 words)

 Primary Structure, Neural-specific Expression, and Chromosomal Localization of Cux-2, a Second Murine Homeobox Gene ...
The peripheral nervous system of Drosophila consists of sensory organs that are of two types: external sensory neurons which comprise mechanoreceptors or chemoreceptors, and chordotonal neurons which are proprioreceptive.
In the developing embryo, Cut protein is present in external sensory organ precursor cells and the anlagen of the Malpighian tubules in the hindgut.
In mutants with absent or cytoplasmic localization of Cut, external sensory organs are transformed into chordotonal organs (9).
www.jbc.org /cgi/content/full/271/37/22624   (8560 words)

 Crest of the stars question   (Site not responding. Last check: 2007-10-29)
When this organ is hooked up to a spaceship's control system, an Abh can pilot the ship as easily as walking across a room.
The organ is a small diamond-shaped eye in the middle of their forehead.
The Abh have an additional sensory organ in the center of their foreheads that resembles an insects compound eye.
www.seriousstyle.org /new-1527003-73.html   (8037 words)

 Tufted Is a Gain-of-Function Allele That Promotes Ectopic Expression of the Proneural Gene amos in Drosophila -- ...
organs (macrochaetae in the notum and smaller bristles in the
neurons and sensory organs and the ectopic expression of amos.
to generate external sensory organs in the wing disc derivatives.
www.genetics.org /cgi/content/full/163/4/1403   (4679 words)

 The bereft Gene, a Potential Target of the Neural Selector Gene cut, Contributes to Bristle Morphogenesis -- Hardiman ...
In the complex es organs of the thoracic segments, the humidity
The es organs predominantly affected in bft alleles are the
The pattern of four cells stained per IOB es organ is indistinguishable from wild type.
www.genetics.org /cgi/content/full/161/1/231   (8235 words)

 Numb-Associated Kinase Interacts with the Phosphotyrosine Binding Domain of Numb and Antagonizes the Function of Numb ...
(H) Schematic drawing of an adult external sensory organ; (I) external sensory organ lineage, with the solid arrow indicating the direction of cell fate transformation due to overexpression of Nak and the lower, empty arrow indicating the direction caused by overexpression of Numb.
The Drosophila Numb protein inhibits signaling of the Notch receptor during cell-cell interaction in sensory organ lineage.
Asymmetric distribution of numb protein during division of the sensory organ precursor confers distinct fates to daughter cells.
mcb.asm.org /cgi/content/full/18/1/598   (7415 words)

 A Gain-of-Function Screen for Genes That Affect the Development of the Drosophila Adult External Sensory Organ -- ...
cells and later in the lineage of the es organ.
On the scutellum and between the dorsocentral macrochaetae, sca-Gal4 is expressed not only in the developing sensory organs but also in surrounding domains.
organs or subsets of support cells were grouped into class II independently of other phenotypes.
www.genetics.org /cgi/content/full/155/2/733   (6563 words)

 Bazooka is required for localization of determinants and controlling proliferation in the sensory organ precursor cell ...
Bazooka is required for localization of determinants and controlling proliferation in the sensory organ precursor cell lineage in Drosophila -- Roegiers et al.
Bazooka is required for localization of determinants and controlling proliferation in the sensory organ precursor cell lineage in Drosophila
Conversion of neurons and glia to external-cell fates in the external sensory organs of Drosophila hamlet mutants by a cousin-cousin cell-type respecification
www.pnas.org /cgi/content/abstract/98/25/14469   (321 words)

 Sensory Resources -- Welcome
Offering side-by-side examples of typical and atypical responses to everyday sensory stimuli, this program assists teachers and therapists to help preschoolers improve their learning and behavior.
If you are interested in an author, speaker, book, videocassette, audiocassette, or another resource that you would like us to offer, please click here to send your suggestion.
With detailed listings of publications and resources for raising children with sensory motor, developmental, and social-emotional challenges, this catalog is an excellent reference for parents, educators and therapists alike.
www.SensoryResources.com   (331 words)

 Neuroscience for Kids - Crocodialian Senses   (Site not responding. Last check: 2007-10-29)
For example, rattlesnakes have a sensitive organ between their eyes and nostrils to detect heat.
Daphne Soares, a graduate student in the Department of Biology at the University of Maryland.
Soares believes that these special sensory receptors, which she calls dome pressure receptors (DPRs), are used by crocodilians to hunt, especially at night.
faculty.washington.edu /chudler/alli.html   (262 words)

 Nutrient Tasting and Signaling Mechanisms in the Gut. II. The intestine as a sensory organ: neural, endocrine, and ...
The intestine as a sensory organ: neural, endocrine, and immune responses -- Furness et al.
Intrinsic primary afferent (sensory) neurons are necessary for the generation of appropriate reflex responses to intestinal
Identification and stimulation by serotonin of intrinsic sensory neurons of the submucosal plexus of the guinea pig gut: activity-induced expression of Fos immunoreactivity.
ajpgi.physiology.org /cgi/content/full/277/5/G922   (4294 words)

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