| LAS | laboratory automation system; lateral amyotrophic sclerosis; laxative abuse syndrome; left anterior-... |
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| LASH | left anterior superior hemiblock |
| LSR | lanthanide shift reagent; lecithin/ sphingomyelin ratio; left superior rectus [muscle]; liver/spleen... |
| LSVC | left superior vena cava |
| MSO | management service organization; medial superior olive; medical staff organization |
| intermediate temporal artery | <anatomy, artery> A branch of the insular part of the middle cerebral artery supplying the cortex of the temporal lobe between the anterior and posterior temporal arteries. Synonym: arteria temporalis intermedia. (05 Mar 2000) |
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| occipital border of temporal bone | That part of the temporal bone that articulates with the occipital squama. Synonym: margo occipitalis ossis temporalis. (05 Mar 2000) |
| temporal | <anatomy> Of or pertaining to the temple or temples; as, the temporal bone; a temporal artery. Temporal bone, a very complex bone situated in the side of the skull of most mammals and containing the organ of hearing. It consists of an expanded squamosal portion above the ear, corresponding to the squamosal and zygoma of the lower vertebrates, and a thickened basal petrosal and mastoid portion, corresponding to the periotic and tympanic bones of the lower vertebrates. Origin: L. Temporalis, fr. Tempora the temples: cf. F. Temporal. See Temple a part of the head. Source: Websters Dictionary (01 Mar 1998) |
| temporal aponeurosis | The fascia covering the temporal muscle; it is composed of two layers, lamina superficialis and lamina profunda; both attach above to the superior temporal line but diverge inferiorly to attach to the lateral and medial surfaces of the zygomatic arch. Synonym: fascia temporalis, temporal aponeurosis. (05 Mar 2000) |
| temporal apophysis | The nipple-like projection of the petrous part of the temporal bone. Synonym: processus mastoideus, mastoid bone, temporal apophysis. (05 Mar 2000) |
| temporal arteries | Arteries arising from the external carotid or the maxillary artery and distributing to the temporal region. (12 Dec 1998) |
| temporal arteritis | <pathology> An inflammatory condition of the temporal artery. It is a serious chronic vascular disease, characterised by inflammation of the walls of the blood vessels (vasculitis). The age of affected patients is usually over 50 years of age. It most often involves the carotid artery system, and can lead to blindness or stroke. It can be diagnosed by biopsy of an artery, but there is often a false negative result. Elevation of the erythrocyte sedimentation rate is typical. Treatment is with high dose steroids. Common symptoms include headaches and tenderness over the temple (temporal artery). Can be associated with polymyalgia rheumatica. See: polymyalgia rheumatica. Synonym: cranial arteritis, temporal arteritis (20 Jun 2000) |
| temporal bone | <anatomy> A large irregular bone situated in the base and side of the skull, consisting of three parts, squamous, tympanic and petrous. The bones are distinct at birth; the petrous part contains the vestibulocochlear organ; the bone articulates with the sphenoid, parietal, occipital, and zygomatic bones, and by a synovial joint with the mandible. Synonym: os temporale. (05 Mar 2000) |
| temporal branch of facial nerve | <anatomy, nerve> <anatomy, neurology> Branches of facial nerve innervating the superior portion of the orbicularis oculi muscle and other muscles of facial expression above the eye. Synonym: rami temporales nervi facialis. (05 Mar 2000) |
| temporal canal | <anatomy> A canal in the zygomatic bone transmitting the zygomaticofacial and zygomaticotemporal nerves and vessels. (05 Mar 2000) |
| temporal cortex | A lobe of the brain which is located laterally and below the cerebrum. Contains auditory and receptive areas. (27 Sep 1997) |
| temporal dispersion | Asynchronous repolarization of myocardial fibres that predisposes to abnormal current flow and ectopic rhythms (especially with bradyarrhythmias). (05 Mar 2000) |
| temporal fascia | The fascia covering the temporal muscle; it is composed of two layers, lamina superficialis and lamina profunda; both attach above to the superior temporal line but diverge inferiorly to attach to the lateral and medial surfaces of the zygomatic arch. Synonym: fascia temporalis, temporal aponeurosis. (05 Mar 2000) |
| temporal fossa | The space on the side of the cranium bounded by the temporal lines and terminating below at the level of the zygomatic arch. Synonym: fossa temporalis. (05 Mar 2000) |
| temporal horn | The part of the lateral ventricle extending downward and forward into the medial part of the temporal lobe. See: lateral ventricle. Synonym: cornu inferius ventriculi lateralis, temporal horn. (05 Mar 2000) |