(n.) A conductor, conduit, or artificial channel for conveying water, especially one for supplying large cities with water.
(n.) A canal or passage; as, the aqueduct of Sylvius, a channel connecting the third and fourth ventricles of the brain.
Example Sentences:
(1) In addition to the aqueduct other associated inner ear anomalies have been identified in 60% of this population including: enlarged vestibule (14); enlarged vestibule and lateral semicircular canal (7); enlarged vestibule and hypoplastic cochlea (4); and hypoplastic cochlea (4).
(2) When histamine (5 micrograms) was injected into three different levels of the ventricular system, the magnitude and duration of the resulting increases in plasma epinephrine and glucose were in the following rank order: the third ventricle greater than aqueduct much greater than fourth ventricle.
(3) The majority of the responsive neurons were located in regions surrounding the aqueduct and the medial part of PAG.
(4) When outcome was examined in patients who were stuporous or comatose on admission, a significant increase in septal shift was found among patients with a poor outcome, but there was no significant relationship between outcome and degree of pineal or aqueductal shift.
(5) This is the first case of a fulminant phase of mumps ventriculitis leading to aqueductal stenosis, which has been treated using a ventriculoscope for the first time.
(6) A series of 55 cases is described in which hydrocephalus associated with non-neoplastic narrowing of the Sylvian aqueduct produced symptoms for the first time in adult life.
(7) With systole there is downward (caudal) flow of CSF in the aqueduct of Sylvius, the foramen of Magendie, the basal cisterns and the dorsal and ventral subarachnoid spaces while during diastole, upward (cranial) flow of CSF in these same structures is seen.
(8) A patent cochlear aqueduct indicated on computed tomography scan was found and repaired through a posterior cranial fossa approach.
(9) Rats from the H-Tx strain develop hydrocephalus through a developmental obstruction of the cerebral aqueduct.
(10) In group A, kaolin was present in the fourth ventricle and Sylvian aqueduct.
(11) SE images obtained with gradient moment nulling did not allow confident distinction between patent and obstructed aqueducts.
(12) The signal intensity of the cerebrospinal fluid (CSF) in the cerebral aqueduct and lateral ventricles on magnetic resonance (MR) images was evaluated in 16 healthy individuals and in 32 patients with various forms of hydrocephalus (20 with chronic normal pressure hydrocephalus [NPH], seven with acute communicating hydrocephalus, and five with hydrocephalus ex vacuo [atrophy]).
(13) Tentorial herniation secondary to supratentorial mass lesions will cause aqueductal compression and raised intraventricular pressure.
(14) However, these cytoplasmic edema of the ependymal and glial cells totally subsided by day 30 postinjection, leaving an obliterated aqueduct with a few remnants of ependymal cells without reactive gliosis.
(15) The effect of intracranial pressure on cerebrospinal fluid formation has been studied in cats by ventricular perfusion with the aqueduct of Sylvius blocked (isolated ventricular perfusion).
(16) The disappearance of patency in the cochlear aqueduct is a progressive phenomenon reflecting the biological process of aging in the organism.
(17) The results suggest that under physiological conditions the CSF also flows through the cochleae aqueduct and the protein concentration in the Scala tympani decreases especially in the basal winding.
(18) We demonstrate that the stenosis of the aqueduct is a secondary phenomenon, not causally related to the pathogenesis of hydrocephalus, and discuss the significance of this finding to human aqueduct stenosis.
(19) In the other 71%, the pars rugosa in the vestibular aqueduct was surrounded by dura more commonly than normal.
(20) In this paper we attempted MR visualization of the vestibular aqueduct (VA) with a surface coil.
Viaduct
Definition:
(n.) A structure of considerable magnitude, usually with arches or supported on trestles, for carrying a road, as a railroad, high above the ground or water; a bridge; especially, one for crossing a valley or a gorge. Cf. Trestlework.
Example Sentences:
(1) C-particles were present in t-tubules, which were possible intracellular viaducts of infection or dissemination and perhaps were the loci of receptors of viral invasion of the cytoplasm and sites of egress.
(2) An obvious comparison, made by Gensler, is with the High Line in New York, the phenomenally successful park made out of an old railway viaduct, which like the River Park is long and thin.
(3) Six years before the opening of the Forth Railway Bridge, Gustave Eiffel had completed the lightweight Garabit Viaduct.
(4) The Birmingham and Fazeley viaduct, part of the proposed route for the HS2 high speed rail scheme.
(5) HS2 will pass over local fields on a viaduct, and skirt a new-ish housing development called Sandwath Drive, built around a snooker-table green and a childrens' play area.
(6) The narrative begins with the story of her sister's illness but also incorporates local history, namely the lives (and deaths) of the men who worked on the nearby Ribblehead viaduct in the 1870s; then there are the stories of fell runners, cavers and farmers.
(7) Facebook Twitter Pinterest Birmingham and Fazeley viaduct, part of the proposed route for the HS2 network.
(8) After all the romantic mythologising of On the Road 's Americana, it was genuinely comforting to watch a film mapping a journey from Redditch through to Shipton, Chesterfield and Ribblehead viaduct.
(9) An Italian coach crashes through a "safety" barrier and plunges off a viaduct, leaving at least 37 people dead .
(10) While poor Craig was foraging for nettles and chip scraps in the wilderness (the grass next to the railway viaducts), something strange was happening.
(11) There are two particular infrastructure investments in the county that could make a big contribution to capacity and speed challenges on the line as a whole – a single track section at Usan south of Montrose and the old South Esk viaduct at Montrose itself.
(12) HS2 Facebook Twitter Pinterest ‘No sensible transport economist stands behind HS2.’ The Birmingham and Fazeley viaduct, part of the proposed route for the HS2 rail scheme.
(13) HS2 has said it is aiming to avoid an increase in flood risk by using water management techniques and viaducts.
(14) Among those apparently ignored was Alistair Lenczner, who led the design team on the world-famous Millau Viaduct in southern France.
(15) If Musk really found a way to build viaducts for $5 million per kilometer,” Levy wrote, “this is a huge thing for civil engineering in general and he should announce this in the most general context of urban transportation, rather than the niche of intercity transportation.” Similarly, the proposal briefly discusses thermal expansion: as the steel of the tubes heats in the hot California sun, the metal expands.
(16) Boarding at Fort William close to Ben Nevis, passengers cross the famous 21-arch Glenfinnan Viaduct .
(17) A mile out of Okehampton is the Meldon Viaduct, a gently curved, tottering Victorian lattice of wrought and cast iron 150ft above the West Okement river.
(18) Those viaducts, already curiously undercosted in Musk’s plan?
(19) Although we are more able to appreciate pure engineering structures today, it has been fascinating to witness the publicity surrounding the Millau Viaduct.
(20) Tunnels will hide a proportion of the line, but one historic area, the Missenden valley, will be dissected diagonally by miles of concrete viaducts and embankments.