| canaliculus tympanicus | A minute canal passing from the inferior surface of the petrous portion of the temporal bone between the jugular fossa and carotid canal to the floor of the tympanic cavity. Located in the wedge of bone separating the jugular canal and carotid canal, it transmits the tympanic branch of the glossopharyngeal nerve. Synonym: canaliculus tympanicus, Jacobson's canal, tympanic canal. (05 Mar 2000) |
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| annulus tympanicus | In the foetus, a more or less complete bony ring at the medial end of the cartilaginous external acoustic meatus, to which is attached the tympanic membrane. Synonym: annulus tympanicus, tympanic bone. (05 Mar 2000) |
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| paries tympanicus ductus cochlearis | The wall that separates the cochlear duct from the scala tympani; it consists of the osseous spiral lamina and the basilar membrane. Synonym: paries tympanicus ductus cochlearis, membrana spiralis, spiral membrane. (05 Mar 2000) |
| plexus tympanicus | A plexus on the promontory of the labyrinthine wall of the tympanic cavity, formed by the tympanic nerve, an anastomotic branch of the facial, and sympathetic branches from the internal carotid plexus; it supplies the mucosa of the middle ear, mastoid cells, and auditory (eustachian) tube, and gives off the lesser superficial petrosal nerve to the otic ganglion. Synonym: plexus tympanicus, Jacobson's plexus. (05 Mar 2000) |
| nervus tympanicus | <anatomy, nerve> A nerve from the inferior ganglion of the glossopharyngeal nerve, passing through the tympanic canaliculus to the tympanic cavity, forming there the tympanic plexus which supplies the mucous membrane of the tympanic cavity, mastoid cells, and auditory tube; presynaptic parasympathetic fibres also pass through the tympanic nerve via the lesser superficial petrosal nerve to the otic ganglion, where they synapse with postsynaptic fibres that continue to supply the parotid gland. Synonym: nervus tympanicus, Andersch's nerve, Jacobson's nerve. (05 Mar 2000) |
| sulcus tympanicus | The sulcus on the inner aspect of the tympanic part of the temporal bone in which the tympanic membrane is fixed. Synonym: sulcus tympanicus. (05 Mar 2000) |
| ampulla of lacrimal canaliculus | A slight dilation at the angle of the lacrimal canaliculus immediately beyond the lacrimal punctum. Synonym: ampulla canaliculi lacrimalis. (05 Mar 2000) |
| anterior canaliculus of chorda tympani | <anatomy> A canal in the petrotympanic or glaserian fissure, near its posterior edge, through which the chorda tympani nerve issues from the skull. Synonym: Civinini's canal, Huguier's canal, iter chordae anterius. (05 Mar 2000) |
| auricular canaliculus | The canal that extends from the jugular fossa laterally through the mastoid process. It transmits the auricular branch of the vagus. Synonym: canaliculus mastoideus, auricular canaliculus. (05 Mar 2000) |
| biliary canaliculus | One of the intercellular channels, about 1 um or less in diameter, that occurs between liver cells forming the first portion of the bile system. Synonym: bile capillary. (05 Mar 2000) |
| bone canaliculus | The canaliculus interconnecting bone lacunae with one another or with a haversian canal; contains the interconnecting cytoplasmic processes of osteocytes. (05 Mar 2000) |
| canaliculus | A small canal or channel. See: iter. Origin: L. Dim. Fr. Canalis, canal (05 Mar 2000) |
| canaliculus chordae tympani | A canal leading from the facial canal to the tympanic cavity through which the chorda tympani nerve enters this cavity. Synonym: canaliculus chordae tympani, iter chordae posterius, small canal of chorda tympani. (05 Mar 2000) |
| canaliculus cochleae | A minute canal in the temporal bone that passes from the cochlea inferiorly to open in front of the medial side of the jugular fossa. It contains the perilymphatic duct. Synonym: canaliculus cochleae. (05 Mar 2000) |
| canaliculus innominatus | An occasional opening in the greater wing of the sphenoid bone, between the foramen spinosum and foramen ovale, which transmits the lesser petrosal nerve. Synonym: foramen petrosum, canaliculus innominatus, foramen of Arnold. (05 Mar 2000) |
| canaliculus lacrimalis | A curved canal beginning at the lacrimal punctum in the margin of each eyelid near the medial commissure and running transversely medially to empty with its fellow into the lacrimal sac. Synonym: canaliculus lacrimalis. (05 Mar 2000) |