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=> "Effect of different head impulse procedures on vestibulo-ocular reflex gain" "tieneTextoCompleto" => true "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "218" "paginaFinal" => "221" ] ] "autores" => array:1 [ 0 => array:4 [ "autoresLista" => "Mayada ElSherif" "autores" => array:1 [ 0 => array:4 [ "nombre" => "Mayada" "apellidos" => "ElSherif" "email" => array:1 [ 0 => "mayada.elsherif@alexmed.edu.eg" ] "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">*</span>" "identificador" => "cor0005" ] ] ] ] "afiliaciones" => array:1 [ 0 => array:2 [ "entidad" => "Audiovestibular medicine, OtoRhinolaryngology department Alexandria University, Egypt" "identificador" => "aff0005" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "University of Alexandria, Faculty of medicine, Chompollion ST., El-Azareeta. Tel.: ++2034868032." ] ] ] ] "titulosAlternativos" => array:1 [ "es" => array:1 [ "titulo" => "Efecto de diferentes procedimientos de impulso de la cabeza sobre la ganancia del reflejo vestíbulo-ocular" ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0005" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 819 "Ancho" => 2500 "Tamanyo" => 60551 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Diagrammatic presentation of both outwards versus inwards hears impulse in both vHIT and SHIMP.</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">The vestibulo-ocular reflex (VOR) is a reflex that helps keep the vision clear during head movements and thus plays an essential role in the performance of our daily activities <a class="elsevierStyleCrossRefs" href="#bib0090"><span class="elsevierStyleSup">1,2</span></a> It consists of three component reflex arcs, which subsequently generate eye movements at a very short latency (<15<span class="elsevierStyleHsp" style=""></span>ms). <a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">3</span></a> The VOR is considered to be the fastest reflex in humans. <a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">4</span></a> A head impulse stimulus provokes an angular VOR to originate from the ipsilateral semicircular canals. <a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">5</span></a> The video head impulse test (vHIT) is capable of quantitatively testing the function of each of the six semicircular canals VOR in a physiological manner. Furthermore, the vHIT also provides the opportunity to record the compensatory saccadic eye movements generated during the head impulse. <a class="elsevierStyleCrossRef" href="#bib0115"><span class="elsevierStyleSup">6</span></a> Both the vHIT and suppression head impulse test protocol (SHIMP) test have similar physiological concepts. The fluid movement in the semicircular canals (SCC) caused by the head turn deflects the cupula and the hair cells, thereby initiating an excitatory afferent neural impulse to the vestibular nuclei. Then it reaches the extraocular muscles, resulting in a conjugate eye movement that stabilizes the gaze even during an impulsive head turn. <a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">7</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">The VOR gain calculations assumed to be depending upon the velocity, position, or acceleration of the head and eye movements is controversial. <a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">8</span></a> The vHIT compares the eye and head velocity, starting from the head impulse until the head velocity crosses 0°/s. <a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">9</span></a> Moreover, the VOR gain is a variable value, as it can vary in the same subject from moment to moment, but, the number of head impulses do not affect the VOR gain reliability. <a class="elsevierStyleCrossRefs" href="#bib0135"><span class="elsevierStyleSup">10,11</span></a> Therefore, two head impulses with no artifacts are sufficient to judge the VOR gain in each plane. <a class="elsevierStyleCrossRef" href="#bib0140"><span class="elsevierStyleSup">11</span></a> The aim of this study was to determine whether the head position has an impact on the VOR gain using vHIT and SHIMP test.</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Patients</span><p id="par0015" class="elsevierStylePara elsevierViewall">Ethics approval for this study was obtained from the Ethics Committee of the Faculty of Medicine and it was conducted in accordance to the Declaration of Helsinki. Data were recorded at the xxxxx Main University of xxxxx using the ICS otometrics vHIT. Participants with no medical history of vestibular or neck problems were recruited into the study after obtaining signed informed consent. They were made to sit on a chair and were instructed to fix their gaze on a target at one meter distance from the wall. Goggles were fitted tightly over the subject's head to reduce goggle slippage artifacts. The participants were further instructed to control blinking and voluntary head movements. The calibration process was then initiated in order to reduce eye movement tracking noise and artifacts. Both tests were performed by the same right-handed examiner. Both hands of the examiners were placed on the temporal parts of the subject's head during both tests. The head was recentered after each impulse.</p><p id="par0020" class="elsevierStylePara elsevierViewall">The vHIT was started with at least ten head thrusts on each side from the midline to the rightward and to the leftward, followed by a head thrust from the corresponding side to the midline. The SHIMP test was performed in the same sequence. Participants were instructed to fixate a head fixed laser spot projected by the goggles on the wall. Both the right and left head thrusts were randomly performed to eliminate any bias on the VOR gain (<a class="elsevierStyleCrossRef" href="#fig0005">Figure 1</a>).</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Results</span><p id="par0025" class="elsevierStylePara elsevierViewall">A total of 20 healthy subjects (10 women and 10 men) between 24 and 60 years of age (mean ± SD: 37.3 ± 11.7 years) participated in the study.</p><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Statistical analysis</span><p id="par0030" class="elsevierStylePara elsevierViewall">Data were fed to the computer and analyzed using IBM SPSS software package version 20.0. (Armonk, NY: IBM Corp) Qualitative data were described using number and percent. The Kolmogorov-Smirnov test was used to verify the normality of distribution Quantitative data were described using range (minimum and maximum), mean, standard deviation, median. Paired t-test was assessed for normally distributed quantitative variables, to compare between two periods. Significance of the obtained results was judged at the 5% level.</p><p id="par0035" class="elsevierStylePara elsevierViewall">The mean VOR gain for head velocities ranging from 100 to 250°/s was compared between the outward head impulses and inward head impulses for both tests, and comparison of the right and left lateral SCC stimulations were performed using paired t-test, but no statistically significant differences were found (<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>).</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia></span></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Discussion</span><p id="par0040" class="elsevierStylePara elsevierViewall">This study examined the VOR gain of the right eye for the head thrusts in the lateral plane in 20 healthy subjects. Previous studies had shown a statistical significant increase in the mean VOR for the outwards head impulses compared to the inwards using vHIT for the normal healthy subjects. <a class="elsevierStyleCrossRefs" href="#bib0145"><span class="elsevierStyleSup">12,13</span></a> Nystrom et al. concluded that neck tension during outward head impulses was responsible for a small albeit statistically significant increase in the VOR gain. Moreover, Alexander's law attributing to the VOR gain during fast, outward head impulse has also been proposed<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">12</span></a> Park et al. mentioned an additive effect of the neural integrator by the cervicoocular reflex when the eyes were in an eccentric position during an outward head thrust as responsible for the increased gain. <a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">13</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">Recent studies by Janky et al. (2017) and Lee et al. (2018) reported differences in vHIT gain, even in the same subject, depending on the device or the algorithm used. <a class="elsevierStyleCrossRefs" href="#bib0155"><span class="elsevierStyleSup">14,15</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">On the other hand, a study performed by Schubert et al. on unilateral vestibular loss found no differences for the inward- or outward-directed head thrusts on the VOR gain. The authors concluded that either side head thrust could be used during acute vertigo <a class="elsevierStyleCrossRef" href="#bib0165"><span class="elsevierStyleSup">16</span></a> Interestingly, the VOR gain recorded using the vHIT and the SHIMP test was not significantly different when both outward and inward head impulses were studied. Although this study reported a lower VOR gain in the SHIMP test using outwards head impulses as compared to the inwards head impulses, it was not statistically significant. An earlier study has also reported persistently low VOR gain values in the SHIMP test as compared to vHIT. <a class="elsevierStyleCrossRef" href="#bib0170"><span class="elsevierStyleSup">17</span></a> The low VOR gain in SHIMP test is thought to be caused by persistent inhibition in the VOR throughout the test. <a class="elsevierStyleCrossRef" href="#bib0170"><span class="elsevierStyleSup">17</span></a> Furthermore, there was no statistical difference noted between the rightward and leftward impulses.</p><p id="par0055" class="elsevierStylePara elsevierViewall">In this study, all the subjects were healthy with no significant medical history and with no vestibular or ontological complaints.</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Conclusion</span><p id="par0060" class="elsevierStylePara elsevierViewall">The starting head position does not influence the VOR gain while using either the vHIT or the SHIMP test.</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Competing Interest/ Conflict of Interests</span><p id="par0080" class="elsevierStylePara elsevierViewall">The author declare that there is no conflict of interest</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:12 [ 0 => array:3 [ "identificador" => "xres1542879" "titulo" => "Abstract" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0005" "titulo" => "Objective" ] 1 => array:2 [ "identificador" => "abst0010" "titulo" => "Methods" ] 2 => array:2 [ "identificador" => "abst0015" "titulo" => "Results" ] 3 => array:2 [ "identificador" => "abst0020" "titulo" => "Conclusion" ] ] ] 1 => array:2 [ "identificador" => "xpalclavsec1395550" "titulo" => "Keywords" ] 2 => array:2 [ "identificador" => "xpalclavsec1395551" "titulo" => "Abbreviations" ] 3 => array:3 [ "identificador" => "xres1542878" "titulo" => "Resumen" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0025" "titulo" => "Objetivo" ] 1 => array:2 [ "identificador" => "abst0030" "titulo" => "Métodos" ] 2 => array:2 [ "identificador" => "abst0035" "titulo" => "Resultados" ] 3 => array:2 [ "identificador" => "abst0040" "titulo" => "Conclusión" ] ] ] 4 => array:2 [ "identificador" => "xpalclavsec1395552" "titulo" => "Palabras clave" ] 5 => array:2 [ "identificador" => "sec0005" "titulo" => "Introduction" ] 6 => array:2 [ "identificador" => "sec0010" "titulo" => "Patients" ] 7 => array:3 [ "identificador" => "sec0015" "titulo" => "Results" "secciones" => array:1 [ 0 => array:2 [ "identificador" => "sec0020" "titulo" => "Statistical analysis" ] ] ] 8 => array:2 [ "identificador" => "sec0025" "titulo" => "Discussion" ] 9 => array:2 [ "identificador" => "sec0030" "titulo" => "Conclusion" ] 10 => array:2 [ "identificador" => "sec0035" "titulo" => "Competing Interest/ Conflict of Interests" ] 11 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2020-01-23" "fechaAceptado" => "2020-04-30" "PalabrasClave" => array:2 [ "en" => array:2 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Keywords" "identificador" => "xpalclavsec1395550" "palabras" => array:4 [ 0 => "Vestibulo-ocular reflex" 1 => "Video Head Impulse Test" 2 => "Head Impulse Test" 3 => "SHIMP" ] ] 1 => array:4 [ "clase" => "abr" "titulo" => "Abbreviations" "identificador" => "xpalclavsec1395551" "palabras" => array:3 [ 0 => "VOR" 1 => "vHIT" 2 => "SHIMP" ] ] ] "es" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Palabras clave" "identificador" => "xpalclavsec1395552" "palabras" => array:4 [ 0 => "Reflejo vestíbulo-ocular" 1 => "Prueba de impulso cefálico videoasistida" 2 => "Prueba de impulso cefálico" 3 => "SHIMP" ] ] ] ] "tieneResumen" => true "resumen" => array:2 [ "en" => array:3 [ "titulo" => "Abstract" "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Objective</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">to study the effects on vestibulo-ocular reflex (VOR) gain using both video head impulse test (vHIT) and Suppression Head impulse test (SHIMP) either using the outward or the inwards head impulse.</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Twenty healthy subjects were enrolled in the study. They were examined using otometric vHIT and SHIMP test lateral plane using the lateral outwards head impulse ten impulses for each side and the inwards head impulse ten impulses for each side. The VOR gain resulting from the outwards versus inwards head impulse during the vHIT and SHIMP were statistically compared.</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Twenty healthy subjects, 10 Males and 10 females with a mean age 35<span class="elsevierStyleHsp" style=""></span>±<span class="elsevierStyleHsp" style=""></span>11.7. Paired t- test showed no statistical significance difference in the mean VOR gain of right lateral semicircular canal (1.1<span class="elsevierStyleHsp" style=""></span>±<span class="elsevierStyleHsp" style=""></span>.12) using outwards versus (1.03 ± .22) inwards head impulses, nor for the left lateral semicircular canal mean VOR gain (1.1 ± .22) using outwards head impulse (1.1 ± .3) for inwards head impulse in vHIT. Paired t- test showed no statistical significance difference in the mean VOR gain of right lateral semicircular canal (0.96 ± 0.2)using outwards versus (1.04 ± 0.2) inwards head impulses, nor for the left lateral semicircular canal mean VOR gain (0.98 ± 0.25) using outwards head impulse (1.1 ± 0.28) for inwards head impulse in SHIMP test. No statistical significant difference was found between the VOR gain resulting from the right versus the left semicircular canal.</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusion</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">The starting head position does not affect the VOR gain using both vHIT and SHIMP tests.</p></span>" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0005" "titulo" => "Objective" ] 1 => array:2 [ "identificador" => "abst0010" "titulo" => "Methods" ] 2 => array:2 [ "identificador" => "abst0015" "titulo" => "Results" ] 3 => array:2 [ "identificador" => "abst0020" "titulo" => "Conclusion" ] ] ] "es" => array:3 [ "titulo" => "Resumen" "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Objetivo</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Estudiar el efecto sobre la ganancia de reflejo vestíbulo-ocular (RVO) utilizando tanto la prueba de impulso cefálico videoasistida (vHIT) como la prueba de supresión del paradigma del impulso cefálico (SHIMP), usando el impulso cefálico o bien hacia fuera o hacia dentro.</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Métodos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Participaron en el estudio 20 sujetos sanos. Fueron examinados usando las pruebas vHIT y SHIMP de Otometrics para probar el plano lateral usando el impulso cefálico lateral hacia fuera, 10 impulsos para cada lado, y el impulso cefálico hacia dentro, 10 impulsos para cada lado. Se comparó estadísticamente la ganancia de RVO resultante del impulso cefálico hacia fuera por comparación con el impulso cefálico hacia dentro durante las pruebas vHIT y SHIMP.</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Se estudiaron a 20 sujetos sanos, 10 hombres y 10 mujeres, con una edad media de 35 ± 11,7. La prueba T para muestras emparejadas no mostró una diferencia estadísticamente significativa en la ganancia RVO media del canal semicircular lateral derecho (1,1 ± 0,12) usando impulsos cefálicos hacia fuera por comparación con impulsos hacia dentro (1,03 ± 0,22), ni tampoco en el caso de la ganancia de RVO media del canal semicircular lateral izquierdo (1,1 ± 0,22) usando el impulso cefálico hacia fuera (1,1 ± 0,3) para la prueba de impulso cefálico hacia dentro en la prueba vHIT. La prueba T para muestras emparejadas no mostró una diferencia estadísticamente significativa en la ganancia RVO media del canal semicircular lateral derecho (0,96 ± 0,2) usando impulsos cefálicos hacia dentro (1,04 ± 0,2) por comparación con impulsos cefálicos hacia fuera, ni para la ganancia de RVO media del canal semicircular lateral izquierdo (0,98 ± 0,25) usando impulso cefálico hacia fuera (1,1 ± 0,28) para el impulso cefálico hacia dentro en la prueba SHIMP. No se observó una diferencia estadísticamente significativa en la ganancia de RVO resultante de comparar el canal semicircular derecho con el izquierdo.</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusión</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">La posición inicial de la cabeza no afecta a la ganancia de RVO al usar las pruebas vHIT y SHIMP.</p></span>" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0025" "titulo" => "Objetivo" ] 1 => array:2 [ "identificador" => "abst0030" "titulo" => "Métodos" ] 2 => array:2 [ "identificador" => "abst0035" "titulo" => "Resultados" ] 3 => array:2 [ "identificador" => "abst0040" "titulo" => "Conclusión" ] ] ] ] "multimedia" => array:2 [ 0 => array:7 [ "identificador" => "fig0005" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 819 "Ancho" => 2500 "Tamanyo" => 60551 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Diagrammatic presentation of both outwards versus inwards hears impulse in both vHIT and SHIMP.</p>" ] ] 1 => array:8 [ "identificador" => "tbl0005" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at1" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:2 [ "leyenda" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">RL; right lateral semicircular canal stimulation, LL left lateral semicircular canal stimulation, significant p*<<span class="elsevierStyleHsp" style=""></span>0.005</p>" "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">vHIT \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " colspan="2" align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Mean ± SD</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">P-value comparing outwards and inwards head impulse \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><span class="elsevierStyleBold">Outwards head impulse</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><span class="elsevierStyleBold">Inwards head impulse</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">RL \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.1 ± 0.12 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.03 ± 0.22 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.314 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">LL \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.1 ± 0.22 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.1 ± 0.3 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.755 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><span class="elsevierStyleBold">P-value comparing RL and LL</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.708 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.431 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">SHIMP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">RL \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.96 ± 0.2 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.04 ± 0.2 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.053 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">LL \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.98 ± 0.25 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.1 ± 0.28 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.148 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><span class="elsevierStyleBold">P-value comparing RL and LL</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.728 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.666 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab2648899.png" ] ] ] ] "descripcion" => array:1 [ "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Comparison between the mean VOR gain using outward and inwards head impulse test, right and left canal stimulation in both tests using paired t-test.</p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0015" "bibliografiaReferencia" => array:17 [ 0 => array:3 [ "identificador" => "bib0090" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:1 [ "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "D.T.A. 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Original article
Effect of different head impulse procedures on vestibulo-ocular reflex gain
Efecto de diferentes procedimientos de impulso de la cabeza sobre la ganancia del reflejo vestíbulo-ocular
Mayada ElSherif
Autor para correspondencia
mayada.elsherif@alexmed.edu.eg
University of Alexandria, Faculty of medicine, Chompollion ST., El-Azareeta. Tel.: ++2034868032.
University of Alexandria, Faculty of medicine, Chompollion ST., El-Azareeta. Tel.: ++2034868032.
Audiovestibular medicine, OtoRhinolaryngology department Alexandria University, Egypt