Related Experiment Videos
Parsing attentional components during a simple reaction time task using sleep deprivation and amphetamine
J C Cochran1, D R Thorne, D M Penetar
1Walter Reed Army Institute of Research, Washington, DC 20307-5100.
Perceptual and Motor Skills
|December 1, 1992
Summary
Sleep deprivation impairs performance by disrupting activation more than arousal. Amphetamine restored activation, suggesting these systems impact information processing and motor output.
Area of Science:
- Cognitive Neuroscience
- Psychopharmacology
Background:
- Attention comprises arousal and activation systems.
- Sleep deprivation is a potent modulator of cognitive function.
Purpose of the Study:
- To differentiate the roles of arousal and activation in performance.
- To investigate the effects of sleep deprivation and amphetamine on these attentional components.
Main Methods:
- 18 men underwent 63 hours of sleep deprivation.
- Performed auditory reaction time tasks with varying temporal uncertainty and intensity.
- Administered d-amphetamine or placebo after 48 hours of sleep deprivation.
Main Results:
- Sleep deprivation primarily impaired activation, with arousal remaining relatively intact.
- Amphetamine administration improved performance by restoring the activation system.
- High-intensity stimuli initially disrupted but later facilitated arousal.
Conclusions:
- Activation is more vulnerable to sleep deprivation than arousal.
- Amphetamine can mitigate performance deficits caused by sleep deprivation-induced activation impairment.
- Arousal and activation systems play crucial roles in information processing and motor output stages.