| C2 | second cervical nerve; second cervical vertebra; second component of complement |
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| CII | second cranial nerve |
| C3 | third cervical nerve; third cervical vertebra; third component of complement |
| CIII | third cranial nerve |
| C4 | fourth cervical nerve; fourth cervical vertebra; fourth component of complement |
| inferior cerebral veins | Numerous cerebral veins that drain the undersurface of the cerebral hemispheres and empty into the cavernous and transverse sinuses. Synonym: venae cerebri inferiores. (05 Mar 2000) |
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| inferior cervical ganglion | Inferior-most of the three ganglia of the cervical portion of the sympathetic trunk, occurring at the C7 vertebral level. Most commonly, it is fused to the first thoracic sympathetic ganglion to form a stellate ganglion. Synonym: ganglion cervicale inferius. (05 Mar 2000) |
| inferior choroid vein | <anatomy, vein> A small vein draining the lower part of the choroid plexus of the lateral ventricle into the basal vein. Synonym: vena choroidea inferior. (05 Mar 2000) |
| inferior cluneal nerves | Branches of the posterior femoral cutaneous nerve emerging from beneath the inferior border of the gluteus maximus to supply the skin of the lower half of the gluteal region. Synonym: nervi clunium inferiores. (05 Mar 2000) |
| inferior colliculus | The ovoid, paired, inferior eminence of the laminae of mesencephalic tectum; it receives the lateral lemniscus and projects by way of the brachium of inferior colliculus to the medial geniculate body of the thalamus, and is thus an essential way-station in the central auditory pathway. Synonym: colliculus inferior, corpus quadrigeminum posterius, inferior nasal colliculus, posterior quadrigeminal body. (05 Mar 2000) |
| inferior constrictor muscle of pharynx | Origin, outer surfaces of thyroid (thyropharyngeal part) and cricoid (cricopharyngeal part, musculus cricopharyngeus; superior or upper oesophageal sphincter muscle) cartilages; insertion, pharyngeal raphe in the posterior portion of wall of pharynx; action, narrows lower part of pharynx in swallowing, the cricopharyngeal part has a sphincteric function for the oesophagus, allowing some voluntary control of eructation and reflux; nerve supply, pharyngeal plexus. Synonym: musculus constrictor pharyngis inferior, cricopharyngeus muscle, laryngopharyngeus, musculus laryngopharyngeus. (05 Mar 2000) |
| inferior costal facet | Demifacet on the lower edge of the body of a vertebra articulating with the head of a rib. Synonym: fovea costalis inferior, inferior costal pit. (05 Mar 2000) |
| inferior costal pit | Demifacet on the lower edge of the body of a vertebra articulating with the head of a rib. Synonym: fovea costalis inferior, inferior costal pit. (05 Mar 2000) |
| inferior dental arch | The teeth supported by the alveolar part of the mandible, whether the 10 deciduous teeth or the 16 permanent teeth. Synonym: arcus dentalis inferior, mandibular dentition. (05 Mar 2000) |
| inferior dental artery | <anatomy, artery> Origin, 1st part of maxillary artery; distribution, through mandibular foramen/canal to lower teeth and chin; branches, artery to mylohyoid, mental artery, dental arteries. Synonym: arteria alveolaris inferior, inferior dental artery. (05 Mar 2000) |
| inferior dental canal | The canal within the mandible that transmits the inferior alveolar nerve and vessels. Its posterior opening is the mandibular foramen. Synonym: canalis mandibulae, inferior dental canal. (05 Mar 2000) |
| inferior dental foramen | The opening into the mandibular canal on the medial surface of the ramus of the mandible giving passage to the inferior alveolar nerve, artery, and vein. Synonym: foramen mandibulae, inferior dental foramen. (05 Mar 2000) |
| inferior dental plexus | Formed by branches of the inferior alveolar nerve interlacing before they supply the teeth; it gives off interior dental branches to the teeth and inferior gingival branches to the gums. Synonym: plexus dentalis inferior. (05 Mar 2000) |
| inferior dental rami | Inferior dental branches of inferior dental plexus. Synonym: rami dentales inferiores. (05 Mar 2000) |
| inferior duodenal fold | A fold of peritoneum bounding the inferior duodenal recess. Synonym: plica duodenalis inferior, plica duodenomesocolica, duodenomesocolic fold. (05 Mar 2000) |