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1.
Acta Otorrinolaringol Esp ; 56(8): 349-53, 2005 Oct.
Article in Spanish | MEDLINE | ID: mdl-16285433

ABSTRACT

INTRODUCTION: Vestibulocollic reflex is a muscular reflex which is activated by acoustic stimulation. It shows two components: the first one, the vestibular evoked myogenic potential (VMEP) related to the vestibular pathway and the second, to the auditive pathway. The VMEP potential could be useful for vestibular physiology and pathology knowledge. OBJECTIVE: To determine the VMEP's parameters of normality and to evaluate influential factors such as age, sex or stimulation intensity. MATERIAL AND METHODS: Prospective study of the VCR in 40 healthy individuals, distributed in 4 groups according to their age. Stimulation was carried out at 100db and 85db on each ear independently. RESULTS: There are not differences between both ears and sexes. Normal latency levels must be separated between two groups of age: older and younger than 11 years old. Normal absolute values of amplitude response differ depending on muscular contraction, age and stimulation intensity. It is more representative to consider the difference between the values obtained in the two ears of the same individual than to consider the absolute values.


Subject(s)
Evoked Potentials, Auditory/physiology , Vestibular Diseases/diagnosis , Vestibular Diseases/physiopathology , Vestibular Function Tests , Adolescent , Adult , Auditory Pathways/physiopathology , Child , Child, Preschool , Electromyography/instrumentation , Female , Humans , Infant , Male , Prospective Studies , Reference Values , Severity of Illness Index
2.
Acta otorrinolaringol. esp ; 56(8): 349-353, oct. 2005. ilus, tab
Article in Es | IBECS | ID: ibc-040705

ABSTRACT

Introducción: El reflejo vestibulocervical es un reflejo muscular que se activa mediante estimulación acústica. Presenta dos componentes: el primero, que es el potencial vestibular miogénico evocado (PVME) se relaciona con la vía vestibular y el segundo con la vía auditiva. El PVME puede ser útil para el conocimiento de la fisiología y patología vestibular. Objetivo: Determinar los parámetros de normalidad del PVME y evaluar factores influyentes como edad, sexo o intensidad de estimulación. Material y métodos: Estudio prospectivo del RVC en 40 sujetos sanos que se distribuyeron en 4 grupos, estratificados según su edad. Se realizó la estimulación a 100 db y 85 db a cada oído por separado. Resultados: No existen diferencias entre ambos oídos ni ambos sexos. Los valores normales de latencias se deben separar en dos grupos de edad: mayores y menores de 11 años. Los valores normales absolutos de la amplitud de la respuesta varían en función de la contracción muscular, de la edad y de la intensidad de estimulación. Es más representativo considerar la diferencia entre las respuestas de los dos oídos de un mismo sujeto que los valores absolutos


Introduction: Vestibulocollic reflex is a muscular reflex which is activated by acoustic stimulation. It shows two components: the first one, the vestibular evoked myogenic potential (VMEP) related to the vestibular pathway and the second, to the auditive pathway. The VMEP potential could be useful for vestibular physiology and pathology knowledge. Objective: To determine the VMEP’s parameters of normality and to evaluate influential factors such as age, sex or stimulation intensity. Material and methods: Prospective study of the VCR in 40 healthy individuals, distributed in 4 groups according to their age. Stimulation was carried out at 100db and 85db on each ear independently. Results: There are not differences between both ears and sexes. Normal latency levels must be separated between two groups of age: older and younger than 11 years old. Normal absolute values of amplitude response differ depending on muscular contraction, age and stimulation intensity. It is more representative to consider the difference between the values obtained in the two ears of the same individual than to consider the absolute values


Subject(s)
Male , Female , Infant , Child , Adult , Aged , Humans , Evoked Potentials/physiology , Vestibular Diseases/physiopathology , Vestibule, Labyrinth/physiopathology , Neck/innervation , Vestibular Nerve/physiology , Reference Standards , Evoked Potentials, Motor , Electromyography , Age Factors
3.
Acta otorrinolaringol. esp ; 56(3): 102-106, mar. 2005. ilus, tab
Article in Es | IBECS | ID: ibc-038144

ABSTRACT

Introducción: Los test con registro videonistagmográfico más utilizados para el estudio del sistema vestibular son las pruebas calóricas y las cinéticas o rotatorias. Material y Métodos: Hemos efectuado un estudio comparativo de las pruebas cinéticas a través de una muestra de 41 pacientes sin patología vestibular, estratificados por edad y sexo. Las pruebas rotatorias practicadas han sido: constante/ciclos, postrrotatoria, creciente, decreciente y constante. Resultados: No hemos observado influencia de edad o sexo sobre los resultados. Se aportan los resultados numéricos de estas pruebas. Conclusiones: Los datos obtenidos permiten concluir que la información aportada por la prueba pendular creciente y decreciente son similares, fenómeno que no ocurre en el resto de las pruebas. Estudiamos también el fenómeno de habituación a un estímulo mantenido. Resaltamos la importancia de que cada laboratorio efectúe sus test a un grupo control normal para utilizarlo como referencia para estudiar a pacientes patológicos


Introduction: The most frecuently tests used to study the vestibular system, with videonystagmographic register, are the caloric and rotatory ones. Material and Methods: We have carried out a comparative study of the kinetic tests through a sample of 41 patients without vestibular pathology, stratified by age and gender. The performed rotational tests have been: Constant/cycles, postrrotatory test, increasing, decreasing and constant test. Results: We have not observed age or gender influence on the results. We give the numeric results of these tests. Conclusion: The obtained data allow to conclude that the information given by the increasing and decreasing pendulous test is similar, phenomenon that doesn't happen in the rest of the practiced tests. We also study the habituation phenomenon to a know stimuli. We point out the importance of each laboratory to have their tests done previously in a normal control group in order to compare the results when performing them in pathological patients


Subject(s)
Male , Female , Adult , Aged , Middle Aged , Humans , Vestibular Diseases/diagnosis , Vestibular Function Tests/methods , Reference Values , Nystagmus, Pathologic/diagnosis , Age Factors , Sex Factors
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