| RSO | radiation safety officer; Resident Surgical Officer; right superior oblique [muscle] |
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| RSR | regular sinus rhythm; relative survival rate; right superior rectus [muscle] |
| RSVC | right superior vena cava |
| SC | conditioned stimulus; sacrococcygeal; Sanitary Corps; scalenus [muscle]; scapula; Schwann cell; scia... |
| SCA | self-care agency; severe congenital anomaly; sickle-cell anemia; single-camera autostereoscopic [ima... |
| apertura tympanica canaliculi chordae tympani | The small canal opening found lateral to the pyramidal eminence in the posterior wall of the middle ear cavity from which the chorda tympani nerve emerges to pass anteriorly between the ossicles accompanied by a branch of the stylomastoid artery. Synonym: apertura tympanica canaliculi chordae tympani. (05 Mar 2000) |
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| 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) |
| ramus communicans cum chorda tympani | <anatomy, nerve> Terminal branch of chorda tympani joining the lingual nerve in the infratemporal fossa; conveys sensory fibres for taste from anterior two-thirds of tongue and presynaptic parasympathetic fibres destined for submandibular ganglion for innervation of submandibular and sublingual salivary glands. Synonym: ramus communicans cum chorda tympani. (05 Mar 2000) |
| paries caroticus cavi tympani | It contains the carotid canal and the opening of the auditory tube. Synonym: paries caroticus cavi tympani, anterior wall of middle ear, carotid wall of middle ear. (05 Mar 2000) |
| paries jugularis cavi tympani | The floor of the tympanic cavity; a thin plate of bone separating the tympanic cavity from the jugular fossa. Synonym: paries jugularis cavi tympani, fundus tympani, inferior wall of tympanic cavity, jugular wall of middle ear. (05 Mar 2000) |
| paries labyrinthicus cavi tympani | A bony layer separating the middle from the internal ear or labyrinth; it contains the fenestra vestibuli and the fenestra cochleae. Synonym: paries labyrinthicus cavi tympani, labyrinthine wall of middle ear, medial wall of middle ear. (05 Mar 2000) |
| paries mastoideus cavi tympani | It contains the opening into the mastoid antrum. Synonym: paries mastoideus cavi tympani, mastoid wall of middle ear, posterior wall of middle ear. (05 Mar 2000) |
| paries membranaceus cavi tympani | The wall formed mainly by the tympanic membrane. Synonym: paries membranaceus cavi tympani, lateral wall of middle ear, membranous wall of middle ear. (05 Mar 2000) |
| paries tegmentalis cavi tympani | The superior wall, or roof, of the tympanic cavity, formed by the tegmen tympani of the temporal bone. Synonym: paries tegmentalis cavi tympani, tegmental wall of middle ear. (05 Mar 2000) |
| cavum tympani | An air chamber in the temporal bone containing the ossicles; it is lined with mucous membrane and is continuous with the auditory tube anteriorly and the tympanic antrum and mastoid air cells posteriorly. Synonym: cavitas tympanica, cavity of middle ear, cavum tympani, tympanum. (05 Mar 2000) |
| membrana tympani | <anatomy> The eardrum. (13 Nov 1997) |
| membrana tympani secundaria | The membrane closing the fenestra cochleae or rotunda. Synonym: membrana tympani secundaria, Scarpa's membrane. (05 Mar 2000) |
| chorda tympani nerve | <anatomy, nerve> A branch of the facial (7th cranial) nerve which passes through the middle ear and continues through the petrotympanic fissure. The chorda tympani nerve carries taste sensation from the anterior two-thirds of the tongue and conveys parasympathetic efferents to the salivary glands. (12 Dec 1998) |
| communicating branch of chorda tympani to lingual nerve | <anatomy, nerve> Terminal branch of chorda tympani joining the lingual nerve in the infratemporal fossa; conveys sensory fibres for taste from anterior two-thirds of tongue and presynaptic parasympathetic fibres destined for submandibular ganglion for innervation of submandibular and sublingual salivary glands. Synonym: ramus communicans cum chorda tympani. (05 Mar 2000) |
| communicating branch of otic ganglion to chorda tympani | A small branch of the otic ganglion conveying sensory fibres to the chorda tympani. Synonym: ramus communicans cum chorda tympani. (05 Mar 2000) |