Exemplos de uso de Ocular movement em Inglês e suas traduções para o Português
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Thus, in LLAEP testing, controlling ocular movement artifacts is essential.
This ocular movement is reflexive and known as vestibulo-ocular reflex VOR, which ensures a stable image.
MJD patients have limitations in ocular movement, first upwards and, later on, in all directions.
Thus, auditory evoked potentials were recorded to minimize any interference from ocular movement artifacts Fig.
Therefore, a complex ocular movement is required to maintain a large field of view on the object of interest.
In this sense, this research main objective was to evaluate the contrast¿s visual perception, and the dyslexic reader ocular movement.
The pendular tracking test was performed using ocular movement in the pursuit of a target that moved in a sinusoidal fashion.
Regarding saccadic movements Table 2,we verified that the age factor did not affect the velocity of ocular movement, nor its latency.
With the electrodes disposed in this manner,we monitored ocular movement and delimited the rejection level used in each examination.
Upon admission, he had sudden onset of fever, severe swelling over the right eyelid andsupraciliary region, and painful ocular movement.
Psychophysical tasks that evaluate contrast sensitivity and ocular movement are appropriate indicators for visual processing function.
There is proptosis, chemosis,significant pain that never increases with bulb pressure or movement and ocular movement limitation.
A subtraction process was applied wherein the ocular movement recording was subtracted from the auditory potential recordings response A-B.
CONCLUSION: The pneumo-orbit is a rare injury of paranasal sinus, that can expand the orbit andto result in proptosis or reduction of the ocular movement.
The arrangement of electrodes is one of the variables to be taken into account for recording ocular movement; the supra- and infraorbital positions are preferred.
The optokinetic nystagmus test assesses ocular movement, which aims to keep the image on the fovea, triggered by visual stimuli of bright spots moving right and left.
At the end of the oculomotor tests, we conducted the optokinetic nystagmus test,which consists in an involuntary ocular movement before continuous visual stimuli.
The ocular movement comprises a slow component, which refers to the movement of the eyes in pursuit of the object, and a quick component, which represents the return of the gaze to another end.
An auditory evoked potential recording resulted, which eliminated any interference from ocular movement artifacts; there was also phase correspondence between the potentials Fig.
Prior recording of ocular movement and blinking was done in channel B to verify its amplitude and set the rejection level for each exam, so that these movements would not be picked up in channel A and interfere with LLAEP recordings.
In the smooth pursuit tests the patients were asked to use their eyes to follow a source of light moving on a sinusoidal pattern at 0.1,0.2, and 0.4 Hz; ocular movement type and gain were analyzed.
Testing was done in an acoustic booth with subjects comfortably inthe supine position and with closed eyes to avoid ocular movement artifacts using 3A insertion phones; the individual impedance was below 5kW and the impedance among individuals was lower than 2KW.
Using electrodes placed bilaterally on the external tip of eyes, reported by some authors, was not done in this study, since there was no electrode for the external ocular region there were only two channels;this did not affect the quality of ocular movement recordings.
The degree of alertnessaffects LLAEPs recordings;4 therefore, several authors recommend controlling ocular movement artifacts in this test. It becomes an ally for reliable recordings by eliminating subjectivity; however, no detailed descriptions were found about this method.
Only two studies on the use of these potentials for studying central auditory maturity have been published in Brazilian literature; in these cases, two-channel devices were used to demonstrate that, as the auditory system matures, latency values andLLAEP amplitudes change. One of these studies attempted to control the ocular movement artifact.
Other techniques include automatically controlling the artifact,which consists of automatically excluding auditory potentials recorded during ocular movement, eye fixation as a method for minimizing ocular movement, and rejecting those recordings with amplitudes that encompass ocular movement; no detailed explanation, however, is given as to how these techniques are done.
In this study, our aim was not to compare the latency of fixed and random movements, but we observed Table 2 that the maximum value of the latency of fixed movements was higher than that of random movements; this may be related to the velocity of the stimulus, which was higher in random movements 1 Hz, i.e.,when the stimulus is faster, the ocular movement must also be faster, requiring a shorter latency from the patient.
The artifact rejection level was adjusted in channel B to include the ocular movement amplitude and blinking in each subjects, and transposed to channel A to maintain a 30% level of rejected stimuli, to record potentials with a morphology that made it possible to accurately analyze the recording in a feasible time for clinical practice, since lower levels increased the duration of the exam, rendering it impractical.
The purpose of this study was not to establish guidelines for latency and amplitude values of LLAEP components in adults, butto describe the recording methods for these procedures and to compare ocular movement control during testing. We intended to apply international parameters used in research adapted to two channel devices, which are generally used in the Brazilian context.
This assessment was made up by anamneses; visual inspection of the external acoustic meatus; tonal audiometry; speech recognition threshold; speech recognition percentage index; tympanometry; acoustic reflex study; Brazilian version of the Dizziness Handicap Inventory; dizziness analog scale; positioning andpositional nystagmus test; ocular movement calibration; spontaneous and semi-spontaneous nystagmus; fixed and randomized saccadic movements; pendulum tracking; optokinetic nystagmus; decreasing rotational pendulum test, caloric test; and Balance Rehabilitation Unit BRU posturography.