| tuberculum jugulare | An oval elevation on the cerebral surface of the lateral part of the occipital bone, on either side of the foramen magnum above the hypoglossal canal. Synonym: tuberculum jugulare. (05 Mar 2000) |
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| tuberculum articulare ossis temporalis | Articular eminence of the temporal bone which bounds the mandibular fossa anteriorly; it forms the anterior root of the zygomatic process; it is enclosed by the articular capsule of the temporomandibular joint with the articular fossa; the head of the mandible (and intervening articular disc) move onto the articular tubercle to allow full depression of mandible (opening of mouth). Synonym: tuberculum articulare ossis temporalis, articular eminence of temporal bone, eminentia articularis ossis temporalis, tuber zygomaticum. (05 Mar 2000) |
| tuberculum marginale ossis zygomatici | A prominence on the temporal border of the zygomatic bone to which the temporal fascia is attached. Synonym: tuberculum marginale ossis zygomatici, marginal tubercle. (05 Mar 2000) |
| tuberculum ossis scaphoidei | A projection at the inferior lateral angle of the scaphoid (navicular) bone; it can be felt at the root of the thumb. Synonym: tuberculum ossis scaphoidei. (05 Mar 2000) |
| tuberculum ossis trapezii | A prominent ridge on the trapezium forming the lateral border of the groove in which runs the tendon of the flexor carpi radialis. Synonym: tuberculum ossis trapezii, oblique ridge of trapezium. (05 Mar 2000) |
| angulus occipitalis ossis parietalis | An angle formed by the junction, at the opisthion, of lines coming from the basion and from the projection in the median plane of the lower border of the orbits. See: Daubenton's line, Daubenton's plane. Synonym: angulus occipitalis ossis parietalis, occipital angle of parietal bone. (05 Mar 2000) |
| margo occipitalis ossis parietalis | The posterior margin of the parietal bone that articulates with the occipital squama. Synonym: margo occipitalis ossis parietalis. (05 Mar 2000) |
| margo occipitalis ossis temporalis | That part of the temporal bone that articulates with the occipital squama. Synonym: margo occipitalis ossis temporalis. (05 Mar 2000) |
| pars basilaris ossis occipitalis | The part of the occipital bone that lies anterior to the foramen magnum and joins with the body of the sphenoid bone. Synonym: pars basilaris ossis occipitalis, basal part of occipital bone, basilar apophysis, basilar process of occipital bone, basilar process, basiocciput. (05 Mar 2000) |
| pars lateralis ossis occipitalis | The part of the occipital bone that lies on either side of the foramen magnum. Synonym: pars lateralis ossis occipitalis, exoccipital bone. (05 Mar 2000) |
| incisura jugularis ossis occipitalis | The notch in the occipital bone which forms one boundary of the jugular foramen. Synonym: incisura jugularis ossis occipitalis. (05 Mar 2000) |
| glomus jugulare | <radiology> Most common tumour in jugular fossa with intracranial extension, origin: adventitia of jugular bulb, location: dome of jugular bulb, symptoms: tinnitus, hearing loss, findings: destruction of posterioinferior petrous pyramid and corticojugular spine, soft tissue mass in jugular bulb region, hypotympanicum, middle ear, destruction of ossicles (usually incus), otic capsule, posteromedial surface of petrous bone, MRI: salt and pepper appearance (multiple tumour vessels), angio: hypervascular mass; invasion/obstruction of the jugular bulb by thrombus/tumour; AV shunting, malignant transformation with metastasis to regional nodes (2-4%) see: paraganglioma (glomus tumour) (12 Dec 1998) |
| glomus jugulare tumour | A paraganglioma involving the glomus jugulare, a microscopic collection of chemoreceptor tissue in the adventitia of the bulb of the jugular vein. It may cause paralysis of the vocal cords, attacks of dizziness, blackouts, and nystagmus. It is not resectable but radiation therapy is effective. It regresses slowly, but permanent control is regularly achieved. (12 Dec 1998) |
| foramen jugulare | A passage between the petrous portion of the temporal bone and the jugular process of the occipital, sometimes divided into two by the intrajugular processes; it contains the internal jugular vein, inferior petrosal sinus, the glossopharyngeal, vagus, and accessory nerves, and meningeal branches of the ascending pharyngeal and occipital arteries. Synonym: foramen jugulare, foramen lacerum posterius. (05 Mar 2000) |
| tuberculum | Origin: L, dim. Of tuber a swelling. <zoology> A tubercle. Source: Websters Dictionary (01 Mar 1998) |
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