The effect of acute vibration on visual reaction time in fencers / El efecto de la vibración aguda en el tiempo de reacción visual en tiradores

The purpose of this study is to determine the effect of an acute local vibration exercise on the visual reaction time of a fencer's upper body extremities. Twenty-six male fencers between the ages of 15 and 23 (mean age, 17.38 ± 2.13 years, height: 173.6±9.1 cm, body mass: 70.2 ±14.1 kg) volunteered for this study. The reaction time test was applied before and after the vibration exercise (applied for 30 seconds in 27 Hz with a 2-mm amplitude). After 25 min. standard warming up, fencers were informed about the test, and three repeated reaction tests were performed to provide familiarization. The fencers started the reaction test in the standard fencing guard position. According to five signals coming at two to five second intervals from the target monitor, the fencers made touché by bending (attacking). The reaction time test had five trials. The average reaction time values pre-vibration, and post-vibration were compared. The visual reaction time measured pre-vibration were significantly longer than those measured post-vibration (p < 0.001). Acute local vibration exercise applied to fencers shortened the visual reaction time. Given the fact that vibration can improve RT, the use of vibration in training has the potential to provide an advantage to fencers

El propósito de este estudio es determinar el efecto de un ejercicio de vibración local aguda en el tiempo de reacción visual de las extremidades superiores de un esgrimidor. Veintiséis esgrimidores masculinos entre las edades de 15 y 23 (edad media, 17.38 ± 2.13 años, altura: 173.6 ± 9.1 cm, masa corporal: 70.2 ± 14.1 kg) se ofrecieron como voluntarios para este estudio. La prueba del tiempo de reacción se aplicó antes y después del ejercicio de vibración (aplicado durante 30 segundos en 27 Hz con una amplitud de 2 mm). Después de 25 min. calentamiento estándar, se informó a los esgrimidores sobre la prueba y se realizaron tres pruebas de reacción repetidas para proporcionar familiarización. Los esgrimidores comenzaron la prueba de reacción en la posición estándar de protección de esgrima. De acuerdo con cinco señales que vienen a intervalos de dos a cinco segundos desde el monitor objetivo, los esgrimistas hicieron un toque al doblarse (atacar). La prueba del tiempo de reacción tuvo cinco ensayos. Se compararon los valores promedio de tiempo de reacción pre-vibración y post-vibración. El tiempo de reacción visual medido antes de la vibración fue significativamente mayor que el medido después de la vibración (p <0.001). El ejercicio de vibración local aguda aplicado a los esgrimidores acortó el tiempo de reacción visual. Dado que la vibración puede mejorar la RT, el uso de la vibración en el entrenamiento tiene el potencial de proporcionar una ventaja a los esgrimidores

Simultaneous sudden infant death syndrome.

The simultaneous sudden deaths of twins rarely occur and therefore it has received limited attention in the medical literature. When the deaths of the twins meet the defined criteria for sudden infant death syndrome (SIDS) independently and take place within the same 24 h range it can be called as simultaneous SIDS (SSIDS). The case(s): Twin girls (3.5-month-old) were found dead by their mother in their crib, both in supine position. The infants were identical twins and delivered at a hospital by cesarean section. Both infants were healthy and did not have any serious medical history. Two days prior to the incident, the twins had received the second dose of oral polio, DPT and the first dose of hepatitis B vaccines and they had fever on the first day of the vaccination and been given teaspoonful of acetaminophen. Death scene investigation, judicial investigation, parental assessment, macroscopic and microscopic autopsy findings and the toxicological analysis did not yield any specific cause of death. The case(s) were referred to a supreme board composed of multidisciplinary medical professionals at the Institute of Forensic Medicine, Ministry of Justice, in Istanbul. The Board decided that the available data was consistent with SIDS. These SIDS case(s) are presented because twin SIDS are rare and this is the first time that a simultaneous twin SIDS have been reported in Turkey. Simultaneous SIDS cases have many implications regarding definition, diagnosis and medico-legal approach.