| LSO | lateral superior olive; left salpingo-oophorectomy; left superior oblique; lumbosacral orthosis |
|---|---|
| MSO | management service organization; medial superior olive; medical staff organization |
| IO | incisal opening; inferior oblique; inferior olive; internal os; interorbital; intestinal obstruction... |
| ol | oliv olive oil [Lat. oleum olivea] |
| ASIS | Anterior Superior Iliac Spine |
| LSO | Lateral Superior Olive |
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| MSO | Medial Superior Olive |
| DAO | dorsal accessory olive |
| IO | inferior olive |
| MAO | medial accessory olive |
| superior olive | A circumscript, bipartite cell group located ventrolaterally in the lower pontine tegmentum, immediately dorsal to the trapezoid body; the nucleus receives fibres from both the ipsilateral and contralateral cochlear nuclei, and contributes fibres to the lateral (auditory) lemniscus of both sides. It is believed to be prominently involved in the function of spatial localization of sound. Synonym: nucleus dorsalis corporis trapezoidei, oliva superior, superior olivary nucleus, superior olive. (05 Mar 2000) |
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| pedunculus cerebellaris superior | A large bundle of nerve fibres that originate from the dentate and interpositus nuclei and emerges from the cerebellum in the rostral direction, along the lateral wall of the fourth ventricle. The bundle submerges from the dorsal surface of the brainstem into the mesencephalic tegmentum, where all of its fibres cross in the massive decussation of the superior cerebellar peduncles. Part of the bundle terminates in the contralateral red nucleus; the bulk of the fibres continue rostrally to parts of the ventral intermediate nucleus of thalamus, ventral posterolateral nucleus of thalamus, and central lateral nucleus of thalamus. Synonym: pedunculus cerebellaris superior, brachium conjunctivum cerebelli. (05 Mar 2000) |
| inferior olive | <zoology> A genus of polished marine gastropod shells, chiefly tropical, and often beautifully coloured. Origin: L. An olive. Source: Websters Dictionary (01 Mar 1998) |
| olive | 1. <botany> A tree (Olea Europaea) with small oblong or elliptical leaves, axillary clusters of flowers, and oval, one-seeded drupes. The tree has been cultivated for its fruit for thousands of years, and its branches are the emblems of peace. The wood is yellowish brown and beautifully variegated. The fruit of the olive. It has been much improved by cultivation, and is used for making pickles. Olive oil is pressed from its flesh. 2. <zoology> Any shell of the genus Oliva and allied genera; so called from the form. See Oliva. The oyster catcher. 3. The colour of the olive, a peculiar dark brownish, yellowish, or tawny green. One of the tertiary colours, composed of violet and green mixed in equal strength and proportion. 4. <anatomy> An olivary body. See Olivary. 5. A small slice of meat seasoned, rolled up, and cooked; as, olives of beef or veal. Olive is sometimes used adjectively and in the formation of self-explaining compounds; as, olive brown, olive green, olive-coloured, olive-skinned, olive crown, olive garden, olive tree, olive yard, etc. <botany> Bohemian olive, a name given to the oleaster or wild stock of the olive; also variously to several trees more or less resembling the olive. Origin: F, fr. L. Oliva, akin to Gr. See Oil. Source: Websters Dictionary (01 Mar 1998) |
| olive oil | The expressed oil of the fruit of Olea europaea; used as a cholagogue, laxative, and emollient, in the preparation of liniments, and in the preparation of foods. (05 Mar 2000) |
| olive-tipped catheter | A ureteral catheter with an olive-shaped tip, used to dilate a constricted ureteral orifice; larger sizes are also used for dilating or calibrating urethral strictures. (05 Mar 2000) |
| pedunculus | Synonym: pedicle. Origin: Mod. L. Dim. Of pes, foot (05 Mar 2000) |
| pedunculus cerebellaris inferior | Large paired bundles of nerve fibres which develop on the dorsolateral surfaces of the upper medulla, extend under the lateral recesses of the rhomboid fossa and curve dorsally into the cerebellum medial to the middle cerebellar peduncle; composed of a larger (lateral) bundle, the restiform body, and a small (medial) bundle, the juxtarestiform body. Fibres forming this composite bundle originate from spinal neurons and medullary relay nuclei. The largest constituent (restiform body) is crossed fibres from the inferior olive; it also contains the dorsal spinocerebellar tract and cerebellar projections from the lateral reticular nucleus, the accessory cuneate nucleus, the paramedian reticular nuclei and the perihypoglossal nuclei. Vestibulocerebellar fibres are placed medially in the inferior cerebellar peduncle and are usually separately identified as the juxtarestiform body. Synonym: pedunculus cerebellaris inferior. (05 Mar 2000) |
| pedunculus cerebellaris medius | The largest of three paired cerebellar peduncles, composed mainly of fibres that originate in the pontine nuclei, cross the midline in the ventral part of pons, and emerge on the opposite side as a massive bundle arching dorsally along the lateral side of the pontine tegmentum into the cerebellum; its fibres are distributed chiefly to the cortex of the cerebellar hemisphere. Synonym: pedunculus cerebellaris medius, brachium pontis. (05 Mar 2000) |
| pedunculus cerebri | Originally denoting either of the two halves of the midbrain (a relatively narrow "neck" connecting the forebrain to the hindbrain); this term has been variably used to designate only those large bundles of corticofugal fibres forming the crus cerebri, or to designate the crus cerebri plus the midbrain tegmentum; this latter more inclusive usage (crus cerebri and midbrain tegmentum) is preferred; the substantia nigra, while a part of the base of the peduncle (basis pedunculi), is considered a structure separating the midbrain tegmentum from the crus cerebri. See: crus cerebri. Synonym: pedunculus cerebri. (05 Mar 2000) |
| pedunculus corporis callosi | A slender vertical whitish band immediately anterior to the lamina terminalis and anterior commissure; contrary to its name, it is not a cortical convolution but is the ventral continuation of the transparent septum. Synonym: area subcallosa, gyrus paraterminalis, gyrus subcallosus, pedunculus corporis callosi, corpus paraterminale, paraterminal body, paraterminal gyrus, peduncle of corpus callosum, precommissural septal area, subcallosal area, Zuckerkandl's convolution. (05 Mar 2000) |
| pedunculus corporis mamillaris | A fascicle of nerve fibres passing to the mamillary body along the ventral surface of the midbrain; it consists of fibres that originate from the dorsal and ventral tegmental nuclei. Synonym: pedunculus corporis mamillaris, fasciculus pedunculomamillaris, pedunculomamillary fasciculus. (05 Mar 2000) |
| pedunculus flocculi | The bundle of afferent and efferent nerve fibres connecting the flocculus and the nodule of the cerebellum; part of its course is in the inferior medullary velum. Synonym: pedunculus flocculi. (05 Mar 2000) |
| pedunculus of pineal body | See: habenula. (05 Mar 2000) |
| pedunculus thalami inferior | A large fibre bundle emerging from the anterior part of the thalamus in the ventral direction, in part joining the medial fibres of the internal capsule, in other part curving laterally around the medial margin of the capsule into the innominate substance. Many of its fibres establish a reciprocal connection of the mediodorsal nucleus of the thalamus with the orbital gyri of the frontal lobe, but numerous other fibres constitute a conduction system from the amygdala and olfactory cortex to the mediodorsal nucleus. See: ansa peduncularis. Synonym: pedunculus thalami inferior. (05 Mar 2000) |
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