The increase in blink rate and duration in the absence of task demand manipulation could suggest hypoxia-induced sympathetic excitation and impairment of adaptive blink inhibition behavior. The effect of hypoxia on oculomotor features is also likely task-specific. In consideration of the extensive demand made upon the visual modality in flight, increased PERCLOS may further tax visual information processing.Thropp JE, Scallon JFV, Buza P. PERCLOS as an indicator of slow-onset hypoxia in aviation. Aerosp Med Hum Perform. 2018; 89(8):700-707.
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