| portio | A part. Origin: L. Portion (05 Mar 2000) |
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| portio intermedia | A root of the facial nerve containing sensory fibres for taste from the anterior 2/3 of tongue whose cell bodies are located in the geniculate ganglion and presynaptic parasympathetic autonomic fibres whose cell bodies are located in the superior salivatory nucleus, i.e., the fibres eventually conveyed via the chorda tympani branch of the facial nerve to the lingual nerve. Synonym: intermediary nerve, intermediate nerve, portio intermedia, Wrisberg's nerve. (05 Mar 2000) |
| portio major nervi trigemini | <anatomy, nerve> The large sensory root of the trigeminal (or fifth cranial) nerve, extending from the semilunar ganglion into the pons through the middle cerebellar peduncle or brachium pontis, immediately lateral to the small motor root. Synonym: radix sensoria nervi trigemini, portio major nervi trigemini. (05 Mar 2000) |
| portio minor nervi trigemini | <anatomy, nerve> The smaller root of the trigeminal nerve, composed of fibres originating from the trigeminal motor nucleus and emerging from the pons medial to the much larger sensory root, to join the mandibular nerve; it carries motor and proprioceptive fibres to the muscles derived from the first bronchial (mandibular) arch, including the four muscles of mastication, plus the mylohyoid, anterior belly of the digastric, and the tensores tympani and veli palati. Synonym: radix motoria nervi trigemini, masticator nerve, portio minor nervi trigemini. (05 Mar 2000) |
| portio supravaginalis | The part of the cervix of the uterus lying above the attachment of the vagina. Synonym: portio supravaginalis. (05 Mar 2000) |
| portio vaginalis | The part of the cervix uteri contained within the vagina. Synonym: portio vaginalis. (05 Mar 2000) |
| apertura lateralis ventriculi quarti | One of the two lateral openings of the fourth ventricle into the subarachnoid space at the cerebellopontine angle. Synonym: apertura lateralis ventriculi quarti, foramen lateralis ventriculi quarti, foramen of Key-Retzius, foramen of Luschka, Retzius' foramen. (05 Mar 2000) |
| apertura mediana ventriculi quarti | The large midline opening in the posterior inferior part of the roof of the fourth ventricle, connecting the ventricle with the cerebellomedullary cistern. Synonym: apertura mediana ventriculi quarti, arachnoid foramen, Magendie's foramen, median aperture of the fourth ventricle. (05 Mar 2000) |
| appendix ventriculi laryngis | A small diverticulum provided with mucous glands extending upward from the ventricle of the larynx between the vestibular fold and the lamina of the thyroid cartilage; it is a vestigial structure, being a much larger structure interdigitating with the neck musculature in some of the great apes where it serves as a resonating chamber. Synonym: sacculus laryngis, appendix ventriculi laryngis, Hilton's sac, laryngeal pouch. Origin: L. Sacculus (05 Mar 2000) |
| ramus choroidei ventriculi lateralis | Lateral ventrical branch of anterior choroid artery. See: choroid branches. (05 Mar 2000) |
| ramus choroidei ventriculi quarti | Fourth ventricle choroid branch of posterior inferior cerebellar artery. See: choroid branches. (05 Mar 2000) |
| ramus choroidei ventriculi tertii | Third ventricle choroid branch of anterior artery. See: choroid branches. (05 Mar 2000) |
| vena coronaria ventriculi | <anatomy, vein> Arises from a union of veins from both surfaces of the cardia of the stomach and an oesophageal tributary from the cardiac portion of the oesophagus; it runs in the lesser omentum and empties into the portal vein. See: oesophageal veins. Synonym: vena gastrica sinistra, coronary vein, vena coronaria ventriculi. (05 Mar 2000) |
| vena posterior ventriculi sinistri | Arises on the diaphragmatic surface of the heart near the apex, runs to the left and parallel to the posterior interventricular sulcus, and empties in the coronary sinus. Synonym: vena posterior ventriculi sinistri. (05 Mar 2000) |
| vena recessus lateralis ventriculi quarti | A small vein originating in the cerebellar tonsil, coursing by the lateral recess of the fourth ventricle on its way to terminate in the petrosal vein. Synonym: vein of lateral recess of fourth ventricle. (05 Mar 2000) |
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