(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.
Zenith
Definition:
(n.) That point in the visible celestial hemisphere which is vertical to the spectator; the point of the heavens directly overhead; -- opposed to nadir.
(n.) hence, figuratively, the point of culmination; the greatest height; the height of success or prosperity.
Example Sentences:
(1) The Cambridge-based couple felt ignored when tried to raise the alarm about the way their business – publisher Zenith – was treated by Lynden Scourfield, the former HBOS banker jailed last week, and David Mills’ Quayside Corporate Services.
(2) After 24 h of fasting the zenith was shifted to the beginning of dark period without any other changes.
(3) Clinical electroencephalography, which reached a zenith in the 1950s and 1960s, increased the range of diagnostic techniques available for a series of brain diseases and revolutionized the study of epilepsy.
(4) That triumphal speech was his apex, the acme, the zenith of his career.
(5) The circadian rhythm of PRL persisted throughout lactation as manifested by: (1) significantly higher mean nighttime than daytime PRL levels in the whole sample, despite higher daytime nursing durations; (2) the distribution of zenith levels which most frequently occur between 23.00 and 07.00 h, when nursing duration is lowest, and which are almost absent between 07.00 and 23.00 h, when nursing duration is highest, and of nadir levels, which have an opposite pattern; (3) spontaneous PRL surges that are more frequent, longer, and of higher magnitude at night than during the day, and (4) the larger magnitude of suckling-induced PRL release from late afternoon through the night compared to the morning in some women.
(6) The zeniths of the curves were recorded about 4--6 hours after the skin incision in both patient groups, despite the different duration of the operations.
(7) However, 1990 proved to be not only the Indy's circulation zenith but also a watershed for its publishing company as recession bit hard into revenue.
(8) After 48 h of fasting remarkable shifts were found resulting in a nadir at the beginning of dark period and a zenith at the middle of light period.
(9) The dying have much to teach the living: so in many ways, this project is the zenith of the Big Brother experiment.
(10) The kind of cinema that reached a zenith in Gillo Pontecorvo's Battle of Algiers .
(11) The cercal system, which may have evolved with the first terrestrial hexapods, reaches its zenith in the orthopteroid insects, but was replaced in holometabolan insects by visual startle mechanisms with descending giant interneurons.
(12) Population growth reached its zenith between 1950-70.
(13) We detected a consistent and significant (P less than 0.01) decline in plasma chromium after glucose administration, the nadir of the chromium response coinciding with the zenith of the glucose concentration.
(14) Thus, the ED30s constitute the "zenith" of an independent isobole in ED50 isobolograms.
(15) They reached a zenith during the Vietnam war when the US government allegedly conducted their highly classified Operation Popeye, an attempt to extend the monsoon season by cloud seeding in the hope of flushing out the Viet Cong.
(16) On Sunday, Mélenchon's star reached its zenith, when early results gave him 11.1% of votes, several percentage points lower than had been expected.
(17) Whereas phosphate has a marked circadian rhythmicity with a zenith between 1.00 and 8.00 hours, total calcium and albumin show a tendency to decrease between 20.00 and 6.00 hours.
(18) The zenith of suppressor activity was observed during most active infection, from 1 to 3 weeks after inoculation.
(19) At the zenith of a culture war, there’s seldom room for compromise.
(20) The highest pressures in the series (about 4 to 5 megaNewtons per square metre) were on the areas of thin fibrocartilage which were identified at the zenith of certain acetabula.