The effect of Valsalva and Jendrassik maneuvers on acoustic reflex

• Main Authors: Deniel Fakouri, Mohammad Hosein Taziki Balajelini, Seyed Mehran Hosseini
• Format: Article
• Language: English
• Published: Asociación Para el Progreso de la Biomedicina 2020-09-01
• Series: Jounal of Negative and No Positive Results
• Subjects: valsalva manoeuvre (vm); acoustic reflex threshold (art); acoustic reflex decay (ard); startle reflex
• Online Access: https://revistas.proeditio.com/jonnpr/article/view/3953

Aims. Studying modulation of acoustic reflex by the Valsalva and the Jendrassik manoeuvres Settings and Design. Quasi-experimental research with the pre-post testing design Methods and Material. This self-control study was conducted on 12 healthy college students aged 21.23 ±  2.02 years. They were well trained to perform the standard Valsalva manoeuvre: maintenance of a 15-second  expiratory pressure at 40 mmHg with open glottis. The Jendrassik manoeuver was performed by pulling  clenched hands. Acoustic reflex threshold, acoustic reflex decay, middle ear pressure and compliance were  measured before and after the Valsalva and the Jendrassik manoeuvres. The order of the right or the left ear  recording was random. The recovery time following manoeuvres were 5 minutes. Statistical analysis used All variables were compared using the repeated measured ANOVA. Results. There were no statistical differences in the threshold and in the decay of acoustic reflex before and  after the Valsalva and the Jendrassik manoeuvres. This finding was similar in both ears and had no laterality. Conclusions. The Valsalva and the Jendrassik manoeuvres as modulator of some somatic and autonomic  reflexes including the sound induced startle reflex have no effect on acoustic reflex.