(1) The characteristic heart rate deceleration shown immediately prior to the aversive stimulus by control subjects was absent in the schizophrenic group.
(2) The Calspan 3-D Computer Simulator of a Motor Vehicle Crash Victim was used to provide estimates of the head and neck response to be expected for the very specific deceleration profiles simulated.
(3) There is a reasonably good correlation between FHR deceleration areas and UApH (Tab.
(4) Total compliance showed an increase with a decelerating flow compared to an accelerating flow in the anaesthetized group as well as in patients with low compliance and high resistance, and also in patients with chronic respiratory disease.
(5) A total of 1552 antepartum nonstress tests performed during the week before delivery are analyzed with respect to both reactivity and the presence of pathologic baseline patterns (tachycardia, bradycardia, diminished beat-to-beat variability) or decelerations.
(6) Children in whom movement is absent or confined to the muscles of facial expression experience heart rate deceleration.
(7) The study group was divided into two subgroups, according to the presence (n = 29) or absence (n = 8) of antepartum late heart rate decelerations.
(8) The results suggest the presence of an alpha-adrenergic pathway from this region of the hypothalamus which projects caudally to increase the gain of the cardio-decelerator baroreceptor reflex in the rabbit.
(9) The incidence of late decelerations during labor, low 5-minute Apgar scores, and small-for-date infants was significantly higher in patients with positive stress tests than in a control group of 257 patients with negative stress tests done over the same period of time.
(10) Late decelerations and contractions registered early in pregnancy were also correlated to a poor outcome.
(11) Significant reduction of arterial pressure and deceleration of pulse were already in evidence in 5 minutes after injection of the drug.
(12) Increase of the inward current amplitude and deceleration of current decay due to the action of low external concentrations of tetrodotoxin (10(-12)-10(-10) M) were observed in a number of the cells tested.
(13) Further reductions in psychotropic medications and the addition of the anticonvulsant medication resulted in continued rapid deceleration of rate of occurrence of maladaptive behaviours with a concomitant increase in lucid statements and independent functioning.
(14) While the term "isokinetics" generally denotes a type of muscular contraction which accompanies a constant rate of limb movement, periods of acceleration and deceleration exist in the context of isokinetic exercise.
(15) The results show that growth deceleration is due to a decrease of the cell production rate kappa p and a simultaneous increase of the cell loss rate kappa l. Both processes contribute to about the same extent to the growth deceleration of the tumor cell population.
(16) The remaining 19 patients with disability due to brain stroke demonstrated deceleration of the cerebral blood flow, most pronounced on the side of brain infarction.
(17) The mean fetal scalp blood pH values were significantly higher in fetuses that showed reactive responses with fetal heart rate acceleration compared with those who had no response or responded with a deceleration to the vibroacoustic stimulation (pH 7.30 and 7.22 respectively).
(18) Previous research with nonhuman subjects has demonstrated that (a) comparable amounts of food are consumed at the same unit price even though different response requirements and reinforcer magnitudes comprise that unit price and (b) increases in unit price decrease food consumption in a positively decelerating fashion.
(19) This paper emphasizes recommendations for deceleration of the normal aging process.
(20) An increase in the stimulation rate as well as an increase in extracellular concentration of Ca ions decelerated the relaxation in the rabbit myocardium, whereas in the rat myocardium a shortening of interimpulse interval accelerated isometric relaxation.
Velocity
Definition:
(n.) Quickness of motion; swiftness; speed; celerity; rapidity; as, the velocity of wind; the velocity of a planet or comet in its orbit or course; the velocity of a cannon ball; the velocity of light.
(n.) Rate of motion; the relation of motion to time, measured by the number of units of space passed over by a moving body or point in a unit of time, usually the number of feet passed over in a second. See the Note under Speed.
Example Sentences:
(1) Arterial compliance of great vessels can be studied through the Doppler evaluation of pulsed wave velocity along the arterial tree.
(2) Some common eye movement deficits, and concepts such as 'the neural integrator' and the 'velocity storage mechanism', for which anatomical substrates are still sought, are introduced.
(3) For this purpose the blood flow velocity in the internal carotid artery, basilar cerebral artery and the anterior cerebral artery was measured by pulsed Dopplersonography before and 5-10 min after i.v.
(4) The severity of injury in a gunshot wound is dependent on many factors, including the type of firearm; the velocity, mass, and construction of the bullet; and the structural properties of the tissues that are wounded.
(5) High velocity flow with a characteristic contour was recorded in patients with a significant gradient.
(6) It facilitated the acquisition of quantitative velocity information with standard Doppler ultrasound techniques by identifying areas of high velocity or turbulent flow and was invaluable in the assessment of anomalous pulmonary venous drainage occurring either as an isolated anomaly or in conjunction with complex intracardiac lesions.
(7) This report represents the first comprehensive description of instantaneous and continous phasic blood velocity at the mitral valve during atrial arrhythmias in man.
(8) The inhibition of estrogen 2-hydroxylase by androgens was demonstrated in screening assays and has been further investigated under initial velocity conditions.
(9) After using the OK method to obtain a distance curve for height, we introduce a new method (VADK) to derive velocity and acceleration curves from the fitted distance curve.
(10) Extraction of liposomes containing guanylate cyclase with 0.2% Lubrol PX resulted in the recovery of 85% of the original amount of added activity, suggesting that the decrease in maximal velocity was not due to enzyme denaturation.
(11) A velocity ratio of less than or equal to 0.25 alone was sensitive (92%) in detecting severe aortic stenosis.
(12) Four types of behavior were observed with increasing stimulation level: 1) the two spectral parameters and conduction velocity both increased with stimulation in 15 experiments, 2) the two spectral parameters decreased and conduction velocity increased in 8 experiments, 3) the two spectral parameters and conduction velocity both decreased in 6 experiments, and 4) the two spectral parameters increased and conduction velocity decreased in 3 experiments.
(13) We did three repeated PD measures of mean aortic flow velocity in ten term infants (using four trained operators) to determine inter- and intraoperator reproducibility.
(14) Increased velocity of motor conduction in at least one nerve related directly proportionally to the Cs concentration of the serum was demonstrated in 56-70% of the patients after one dialysis.
(15) Contrary to current knowledge there was no statistically significant difference in the velocities of nerve conduction on the left and right sides of these subjects.
(16) Starting from the hypothesis that a new type of cooperativity, dynamic cooperativity, is present in the elementary cycles of the chemo-mechanical conversion, quantitative and consistent agreement was obtained between the theoretical and experimental data on the temperature dependences of the streaming velocity and the ATPase activity, including the presence of the phase transition.
(17) The velocity-to-capacity ratios were not different at any of the ages in both the homogenate and microsomal preparations.
(18) Simultaneous atrial imaging and pulsed Doppler velocity measurement showed that passive atrioventricular flow occurred late in atrial lengthening and active atrioventricular flow occurred during atrial contraction.
(19) The solution of these differential equations gives the velocity of the basilar membrane and hence other related quantities, e.g., displacement, pressure, driving-point impedance at the stapes.
(20) The present studies examined the effect of cytosolic protons on electrotonic spread and conduction velocity in cardiac Purkinje fibers.