(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.
Reservoir
Definition:
(n.) A place where anything is kept in store; especially, a place where water is collected and kept for use when wanted, as to supply a fountain, a canal, or a city by means of aqueducts, or to drive a mill wheel, or the like.
(n.) A small intercellular space, often containing resin, essential oil, or some other secreted matter.
Example Sentences:
(1) The high amino acid levels in the cells suggest that these cells act as inter-organ transporters and reservoirs of amino acids, they have a different role in their handling and metabolism from those of mammals.
(2) Gastric reservoir reduction, wrapping the stomach with an inert fabric, is one such procedure.
(3) Other serious complications were reservoir perforation during catheterisation in 3 and development of stones in the reservoir in 2 patients.
(4) Careless Herbicidal aerial spray of a field for weed control and defoliation of cotton before machine picking, resulted in the contamination of an adjoining reservoir, killing large volume of fish.
(5) A physiologically based model, comprising the reservoir, liver blood and tissue, and bile, was fitted to reservoir concentrations of 3H-oxazepam and 3H-oxazepam glucuronides, and the cumulative amount excreted into bile.
(6) In a clear water reservoir built in ready construction after a working-period of five months quite a lot of slime could be found on the expansion joint filled with tightening compound on the base of Thiokol.
(7) Ten patients have undergone abdominal proctocolectomy with the formation of an ileal reservoir anastomosed onto the anal canal using a stapling device.
(8) Liquid-dominated hydrothermal reservoirs, which contain saline fluids at high temperatures and pressures, have a significant potential for contamination of the environment by heavy metals.
(9) Pressure waves appeared at all filling volumes in the reservoir but increased in frequency and amplitude with increasing volume.
(10) Astrocytes are regarded to be target cells serving as a reservoir for agent amplification.
(11) The relatively small reservoir and the maintenance of a minimum flow of water on the trunk river means the plant will work on average at barely 40% of its 11,200MW capacity.
(12) The left anterior descending coronary artery was cannulated and connected to a reservoir to regulate coronary perfusion pressure.
(13) Theoretically, the low-pressure system afforded by the Kock pouch may be superior in long-term safety to that provided by reservoirs made from other bowel segments.
(14) A group of alcoholics constituted the reservoir of Corynebacterium diphtheriae.
(15) We evaluated nine ambulatory insulin infusion pumps from seven manufacturers, basing our ratings primarily on human factors--size, weight, battery type, and adequate reservoir capacity (i.e., 48 hr insulin supply).
(16) Soils rich in keratinic residues constitute a permanent or occasional reservoir for dermatophytes and keratinolytic and keratinophilic fungi, and are a source of potential infection for man and animals.
(17) In the latter, only the commensal rodents constitute a major problem, whereas in rural tropical areas, native semidomestic species also serve as disease reservoirs and sources of infection to man.
(18) The reservoir is made up using 40 cm of detubulized ileum; on the afferent loop (10 cm long) the right ureter is implanted according to the Camey-Le Duc technique, on the efferent loop (25 cm long) the left ureter is implanted according to the same technique.
(19) Patients with draining X maltophilia surgical wound infections served as reservoirs for X maltophilia, and contamination of the respirometers and the hands of shock-trauma intensive care unit personnel resulted in patient-to-patient transmission of X maltophilia.
(20) A reservoir filled with warm heparinized blood was connected to this shunt.