This allows the question of how thermal environment influences human being's responsiveness to be clarified. It is pertinent to assess the relationship between thermal environment and cognitive capacity since all human activity is influenced by the surrounding environment, including working activities. One of these situations is related to workers who perform activities in "extreme" thermal environments, even if these are sedentary activities. Despite these efforts, there are still working situations that can be very harmful to workers' safety and health. The economic and social development that has taken place throughout the 20th century has been accompanied by a greater awareness of work safety and health problems and also by the development of protective measures for workers. Occupational risk and thermal environmental Palabras clave: ondas Alfa, ondas Beta, ambiente térmico, capacidad cognitiva.ġ.1. Con respecto a las ondas Beta en el ambiente térmico frío, la mayoría de la actividad Beta es típicamente mayor que el verificado en el ambiente térmico caliente. En el ambiente térmico caliente, la oscilación de amplitud de las ondas alfa sugiere una alternancia entre periodos de cansancio con los períodos en que aumenta la concentración. Por lo tanto, se llevaron a cabo un conjunto de pruebas de laboratorio para simular trabajo sedentario en dos diferentes ambientes térmicos: 18 ✬ - 40% RH (en frío) y 35 ✬ - 80% RH (caliente). En este estudio, la intención fue evaluar cómo actividad cerebral está directamente influenciada por la temperatura y humedad mientras realiza una tarea. Según algunos autores, las ondas Beta y Alfa están relacionados con la capacidad cognitiva y, su presencia y evolución, la aparición y evolución, con el estado de alerta de un individuo. Los principales son las ondas Alfa, Beta, Theta y Delta. Keywords: Alpha waves, Beta waves, thermal environmental, cognitive capacity.Ĭuando se ejecuta una tarea, puede observarse actividad cerebral através de las ondas eléctricas en diversas bandas de frecuencia. Regarding Beta waves in the cold thermal environment, most of the time Beta activity is typically higher than that verified in the hot thermal environment.
In the hot thermal environment, oscillation on Alpha waves amplitude suggests an alternation between periods of tiredness with periods in which concentration increases. Therefore, a set of laboratory tests were undertaken to simulate sedentary work in two different thermal environments: 18✬ - 40% RH (cold) and 35✬ - 80% RH (hot). In this study, the intention was to evaluate how brain activity is directly influenced by temperature and humidity while performing a task. According to some authors, Alpha and Beta waves are related with cognitive capacity and, their presence and evolution, with an individual' alertness. The main ones are the Alpha, Beta, Theta and Delta waves. When executing a task, brain activity can be observed through electric waves recorded in different frequency bands.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. Received in revised form: March 17 th, 2016. Changes in EEG amplitude ( Alpha and Beta waves) with Thermal environmentĬambios en la amplitud del EEG (ondas Alfa y Beta) con el medio ambiente térmicoĮmanuel Tiago-Costa a, Emília Quelhas-Costa b & João Santos-Baptista cĪ,b,c Research Laboratory on Prevention of Occupational and Environmental Risks (PROA), Porto, Portugalī,cAssociated Laboratory for Energy, Transports and Aeronautics (LAETA), Faculty of Engineering, University of Porto, Porto, Portugal.