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Related Concept Videos

Multi-input and Multi-variable systems01:22

Multi-input and Multi-variable systems

Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
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Transcranial Direct Current Stimulation and Aviator Performance During Simulated Flight.

Kathryn A Feltman, Amanda M Kelley

    Aerospace Medicine and Human Performance
    |December 29, 2023
    PubMed
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    Transcranial direct current stimulation (tDCS) applied during flight significantly improved aviator performance during emergencies. This neurostimulation technique shows promise for enhancing cognitive function in demanding aviation environments.

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    Area of Science:

    • Neuroscience
    • Aviation Psychology
    • Human Factors Engineering

    Background:

    • Cognitive performance in aviators is crucial for flight safety.
    • Rotary-wing aircraft operations present unique challenges that can impact aviator performance.
    • Transcranial direct current stimulation (tDCS) is an emerging non-invasive brain stimulation technique with potential cognitive benefits.

    Purpose of the Study:

    • To evaluate the effects of anodal tDCS applied to the right posterior parietal cortex on aviator performance in a simulated rotary-wing aircraft.
    • To determine if the timing of tDCS application (prior to flight vs. during flight) influences its efficacy in maintaining cognitive performance during unexpected in-flight emergencies.

    Main Methods:

    • A single-blind, randomized, sham-controlled study involving 22 aviators in a Black Hawk simulator.
    • Participants received either active or sham tDCS (2-mA anodal) to the right posterior parietal cortex.
    • Stimulation was delivered either 20 minutes prior to flight or in two 10-minute intervals during flight, with an in-flight emergency introduced at the end of each session.

    Main Results:

    • Active tDCS applied during flight led to statistically significant improvements in approach performance following an in-flight emergency.
    • Aviators receiving during-flight tDCS maintained a more precise approach path (glideslope and localizer values closer to zero) compared to those receiving pre-flight stimulation.
    • No significant differences were observed in secondary performance measures.

    Conclusions:

    • Applying tDCS during flight may help preserve cognitive resources needed to effectively manage unexpected in-flight emergencies.
    • The timing of tDCS application is a critical factor, with during-flight stimulation showing superior effects on performance in this study.
    • These findings suggest tDCS could be a valuable tool for enhancing aviator resilience and performance in high-stress aviation scenarios.