spiral organ

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organ

 [or´gan]
accessory digestive o's (accessory o's of digestive system) organs and structures not part of the alimentary canal that aid in digestion; they include the teeth, salivary glands, liver, gallbladder, and pancreas.
organ of Corti the organ lying against the basilar membrane in the cochlear duct, containing special sensory receptors for hearing, and consisting of neuroepithelial hair cells and several types of supporting cells.
effector organ a muscle or gland that contracts or secretes, respectively, in direct response to nerve impulses.
enamel organ a process of epithelium forming a cap over a dental papilla and developing into the enamel.
end organ end-organ.
Golgi tendon organ any of the mechanoreceptors arranged in series with muscle in the tendons of mammalian muscles, being the receptor for stimuli responsible for the lengthening reaction.
sense o's (sensory o's) organs that receive stimuli that give rise to sensations, i.e., organs that translate certain forms of energy into nerve impulses that are perceived as special sensations.
spiral organ organ of Corti.
target organ the organ affected by a particular hormone.
vestigial organ an undeveloped organ that, in the embryo or in some remote ancestor, was well developed and functional.
o's of Zuckerkandl para-aortic bodies.

spi·ral or·gan

[TA]
a prominent ridge of highly specialized epithelium in the floor of the cochlear duct overlying the basilar membrane of cochlea, containing one inner row and three outer rows of hair cells, or cells of Corti (the auditory receptor cells innervated by the cochlear nerve) supported by various columnar cells: the pillars of Corti, cells of Hensen, and cells of Claudius; the spiral organ is partly overhung by an awninglike shelf, the tectorial membrane, the free marginal zone of which is covered by a gelatinous substance in which the stereocilia of the outer hair cells are embedded.

spi·ral or·gan

(spī'răl ōr'găn) [TA]
A prominent ridge of highly specialized epithelium in the floor of the cochlear duct overlying the basilar membrane of cochlea, containing one inner row and three outer rows of hair cells, or cells of Corti (the auditory receptor cells innervated by the cochlear nerve), supported by various columnar cells: the pillars of Corti, cells of Hensen, and cells of Claudius; the spiral organ is partly overhung by an awninglike shelf, the tectorial membrane, the free marginal zone of which is covered by a gelatinous substance in which the stereocilia of the outer hair cells are embedded.
Synonym(s): Corti organ.

Corti,

Marquis Alfonso, Italian anatomist, 1822-1888.
Corti arch - the arch formed by the junction of the heads of Corti inner and outer pillar cells.
Corti auditory teeth - tooth-shaped formations or ridges occurring on the vestibular lip of the limbus lamina spiralis of the cochlear duct. Synonym(s): auditory teeth
Corti canal - Synonym(s): Corti tunnel
Corti cells - sensory cells in the organ of Corti in synaptic contact with sensory as well as efferent fibers of the cochlear (auditory) nerve. Synonym(s): cochlear hair cells
Corti ganglion - an elongated ganglion of bipolar sensory nerve cell bodies on the cochlear part of the vestibulocochlear nerve in the spiral canal of the modiolus. Synonym(s): spiral ganglion of cochlea
Corti membrane - a gelatinous membrane that overlies the spiral organ (Corti) in the inner ear. Synonym(s): tectorial membrane of cochlear duct
Corti organ - a prominent ridge of highly specialized epithelium in the floor of the cochlear duct. Synonym(s): spiral organ
Corti pillars - cells forming the outer and inner walls of the tunnel in the organ of Corti. Synonym(s): Corti rods; pillar cells; pillar cells of Corti
Corti rods - Synonym(s): Corti pillars
Corti tunnel - the spiral canal in the organ of Corti, filled with fluid and occasionally crossed by nonmedullated nerve fibers. Synonym(s): Corti canal
pillar cells of Corti - Synonym(s): Corti pillars

spi·ral or·gan

(spī'răl ōr'găn) [TA]
Prominent ridge of highly specialized epithelium on floor of cochlear duct overlying basilar membrane of cochlea, containing one inner row and three outer rows of hair cells.
Synonym(s): acoustic papilla.

organ

a somewhat independent body part that performs a specific function or functions.

organ of Corti
the organ lying against the basilar membrane in the cochlear duct, containing special sensory receptors for hearing, and consisting of neuroepithelial hair cells and several types of supporting cells.
effector organ
a muscle or gland that contracts or secretes, respectively, in direct response to nerve impulses.
enamel organ
see enamel organ.
female reproductive organ
paired ovaries, uterine tubes, uterus, vagina and vulva.
genital organ
see penis, vulva, etc.
Golgi tendon organ
gustatory organ
taste bud.
gustus organ
see taste bud.
organ of Jacobson
see vomeronasal organ (below).
male reproductive organ
paired testes, gonadal duct systems (epididymis, ductus deferens), accessory glands, urethra, penis, prepuce and scrotum.
ocular organ
see eye.
olfactory organ
the organ of smell in the nasal mucosa consisting of specialized cells with a tuft of very fine processes protruding into the nasal cavity. Internally they communicate with the olfactory nerves which pass through the cribriform plate of the ethmoid bone to synapse with cells in the glomeruli of the olfactory bulb of the brain.
reproductive o's
those concerned with reproduction. See also penis, vulva, etc.
sense o's, sensory o's
organs that receive stimuli that give rise to sensations, i.e. organs that translate certain forms of energy into nerve impulses which are perceived as special sensations.
solid organ
any organ which does not contain a cavity or lumen and which is not gaseous; that is an organ which consists of parenchyma and stroma, the latter often arranged as trabeculae or surrounding groups of parenchymatous cells to provide support, e.g. liver, kidney.
spiral organ
organ of Corti.
spiral organ of the inner ear
the cochlea.
subfornical organ
a small tubercle in the floor of the third ventricle.
target organ
the organ affected by a particular hormone.
tubular organ
an organ characterized by the presence of a lumen and four concentric tunics in its wall; centrifugally the layers are mucosal, submucosal, muscular and adventitia-serosal.
urinary organ's
vascular organ of the lamina terminalis
in the wall of the third ventricle of the brain.
vestibulocochlear organ
the cochlear duct, semicircular canals, utricle and saccule that occupy the osseous labyrinth.
vestigial organ
an undeveloped organ that, in the embryo or in some remote ancestor, was well developed and functional.
vomeronasal organ
part of the olfactory sense system that consists of a pair of fleshy tubes found on the floor of the nasal cavity on either side of the nasal septum, supported by cartilage sleeve. Probably concerned with scenting and aftersmell of food.