(n.) A turning point; the principal or highest point; top; summit; crown; apex.
(n.) The top, or crown, of the head.
(n.) The zenith, or the point of the heavens directly overhead.
(n.) The point in any figure opposite to, and farthest from, the base; the terminating point of some particular line or lines in a figure or a curve; the top, or the point opposite the base.
Example Sentences:
(1) CNV1 was recorded at the vertex while CNV3 was recorded at multiple electrode sites to assess topographical differences.
(2) Preceding or during movement, maximum ERD was observed in most cases in central-vertex regions.
(3) Brain stem electric responses, recorded with external electrodes on vertex and ear lobes, are excellent for audiometry of young children.
(4) Umbilical blood-gas status at elective cesarean section with oxygen inhalation for breech presentation (25 cases) was compared with that for vertex presentation (25 cases), so as to confirm the security of full-term breech fetuses delivered by cesarean section under spinal anesthesia.
(5) An evoked brain response can also be elicited simultaneously from the vertex response is affected to the same degree by several different aspects of visual stimuli as is the corresponding occipital response.
(6) N1 and P2 to the last preceding frequent stimulus, the rare (attended target) stimulus, and the following two frequent stimuli were evaluated using 6 reference-independent measures: latency (time of maximal potential range between any two locations), amplitude of maximal potential range, global field power, vertex (Cz) current source density, location of extreme potential, and location of potential centroid.
(7) AEPs were recorded to an "oddball" paradigm from vertex and left and right temporal electrodes.
(8) The MRBPs had earlier onsets during the first runs of skill acquisition than during later training sessions; they occurred earlier when they preceded a stimulus train than when they preceded a single stimulus; the onset was earlier over the vertex than over the premotor area.
(9) In addition, careful parametric baseline studies were performed in each cat to strengthen the evidentiary linkage between wave A as recorded from the vertex in these experiments and previous studies describing the origin and trajectory of wave A in the brainstem reticular formation and several regions of thalamus, including the intralaminar nuclei.
(10) Responses were recorded between needle electrodes placed on the vertex and the ipsilateral ear, with ground at the interorbital line.
(11) A model of sleep phasic events such as vertex waves, K complexes, delta waves and sleep spindles is proposed.
(12) The enhancement results have been confirmed for central brain vertex stimulation using the Sheffield magnet.
(13) Anodal stimulation at the vertex produced complex corticospinal volleys that could be recorded at both sites, with multiple waves analogous to the D and I waves documented in animal experiments.
(14) N140 and P190 (the "vertex potentials") are probably generated bilaterally in the frontal lobes, including orbito-frontal, lateral and mesial (supplementary motor area) cortex.
(15) An otherwise healthy five-year-old girl presented for evaluation of a large patch of erythematous scaling alopecia on the vertex of her scalp.
(16) Oxygen extraction in the breech (Mean: 49.0%) was higher than that in the vertex (32.9%).
(17) As it is quite unlikely that P3 generating sources are strongly active during the processing of the frequent stimulus, this effect is possibly due to a component overlap from the vertex potential.
(18) The frequency of congenital anomaly was also studied in 8,863 infants delivered by breech and vertex presentation.
(19) Carbon particles entering the subarachnoid space over the vertex of the cerebral hemispheres drained along selected paravascular and subfrontal pathways in the subarachnoid space to the cribriform plate and thence into nasal lymphatics and cervical lymph nodes.
(20) As it was not possible to collect sufficient material for valid conclusions on a series of patients with similar uterine activity, fetal size, uterine volume, cervical resistance, and lower uterine segment development; only women in normal labor without disproportion and delivered of infants in the occipitoanterior vertex presentation were included in the study.
Vortex
Definition:
(n.) A mass of fluid, especially of a liquid, having a whirling or circular motion tending to form a cavity or vacuum in the center of the circle, and to draw in towards the center bodies subject to its action; the form assumed by a fluid in such motion; a whirlpool; an eddy.
(n.) A supposed collection of particles of very subtile matter, endowed with a rapid rotary motion around an axis which was also the axis of a sun or a planet. Descartes attempted to account for the formation of the universe, and the movements of the bodies composing it, by a theory of vortices.
(n.) Any one of numerous species of small Turbellaria belonging to Vortex and allied genera. See Illustration in Appendix.
Example Sentences:
(1) Arterial-type flows produced a pair of vortex sinks downstream of the branching port.
(2) However, the external muscle fibers of the ventricles ran clockwise from base to apex toward the center of the vortex, which had a striking resemblance to the normal rather than the mirror image pattern.
(3) She says that, while she stayed away from the more difficult ramifications of that upbringing, she nevertheless plunged right into the "hot quicksand" of the Arab-Israeli conflict, right down into the Biblical roots of Jewish-Muslim conflict in the story of Abraham, Hagar, Isaac and Ishmael (which she meditates upon in the opera's Hagar chorus), and into the vortex of questions about Israel's right to exist and what motivates terrorists.
(4) Nancy Curtin, the chief investment officer of Close Brothers Asset Management said: "The US economy didn't just grind to a halt in the first quarter – it hit reverse as the polar vortex took its toll.
(5) Electron microscopy and reactivation of infectivity by vortexing suggested that aggregation makes only a minor contribution to neutralization by IgG or IgM.
(6) This study employs classical inviscid fluid dynamics theory to investigate whether LV diastolic inflow volume and the size of the LV play a role in vortex ring formation.
(7) Azotobacter chroococcum (ATCC 7493) was grown in continuous culture with intense vortex aeration (stirring rate 1750 rpm) with up to 50% O2 in the gas phase.
(8) Vortex flow filtration (VFF) was used to concentrate viruses and dissolved DNA from freshwater and seawater samples taken in Florida, the Gulf of Mexico, and the Bahamas Bank.
(9) Specific modifications to the manual procedure include the use of serial vortex mixings in place of batchwise lateral shaking and the substitution of small (6 mL), disposable solid phase extraction columns driven by compressed gas for large (25 mL), gravity-fed, reusable glass columns.
(10) Flow separations also stimulate vortex formation and turbulent mixing at the downstream jet boundaries and thus may intensify blood damage by turbulent shear stresses.
(11) Both record, with power and sentient humanity, the vortex of war in our world today, and the millions these wars scatter and shatter across it, not least to Europe’s shores.
(12) This vortex, which persists into early systole, provides good washing of the VAD walls.
(13) It’s like you go through some crazy inter-dimensional vortex,” Barbe said.
(14) These vortexes were places where spiritual energy was at its highest point, where you could tap into the frequencies of the universe, where you could, by closing your eyes, start to change your life.
(15) After vortex-mixing and centrifugation, 30 microliters of 4 M K2HPO4 were added followed by gentle shaking.
(16) Excitation frequencies, based on vortex shedding, are estimated to be of the order 2-200 Hz, for the range of flow rates of the theoretical model.
(17) From September 1983 to March 1985, five patients who could not be weaned from extracorporeal circulation or who deteriorated in the recovery room have been treated with biventricular mechanical support using two vortex pumps, standard cannulas and tubing.
(18) This method is then used to study the formation of the sinus vortex and to confirm the predictions of the point vortex model with respect to the role of the vortex in valve closure.
(19) Several lines of evidence suggest that the phagocytic uptake depends, in part, upon the LDL receptor and not the acetyl-LDL receptor: 1) soluble, native LDL and beta-VLDL (but not acetyl-LDL) competed for uptake and degradation of LDL aggregates; 2) reductive methylation of LDL before vortexing reduced the effect of the aggregates on degradation and cholesterol esterification; 3) heparin, which inhibits binding of native LDL to its receptor, reduced the degradation of LDL aggregates.
(20) In contrast, partial heparin-less bypass (N = 5) using a centrifugal vortex pump was used after September 1988, and there were no haemorrhagic or paraplegic complications or mortality in this group.