Brains have resources for the execution of only a finite number of tasks at the same time. Geralt/Pexels |
Evidence shows performing a cognitive task inhibits visual processing. And researchers
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They tested 21 adolescents, aged 16-19, on a dynamometer platform to assess their balance while doing simple and difficult tasks as fast as possible with their eyes open and closed. Subtracting 3 and 18 from a random four-digit number continuously were their simple and difficult tasks respectively.
The researchers found that with their eyes open and closed they swayed performing, both, simple and difficult cognitive tasks. In fact, they swayed more with them closed. This supports a previous study's findings that concluded, limiting the visual field increases upright body sway. Because there was sway with their eyes open researchers believe processing cognitive tasks reduces the role of vision in upright posture control.
Visual function, cognitive function, and upright posture stability control are not independent systems. Upright posture balance is a complex multidimensional process dependent upon proprioceptive, vestibular and skin sensations. Proprioception lets you sense your body’s position without the use of a mirror. The vestibular system helps sense balance, and it's a part of the inner ear.
Because cognitive and visual processes compete for the same resources, the loss of posture control can happen in adolescents in two ways. When a cognitive task is performed and when their visual field is limited. As a result of this study, scientists recommend adding interfering factors into the balance and training of young people to improve their effectiveness.
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