Diazepam impairs temporal dynamics of visual attention.

Area of Science:

• Neuroscience
• Cognitive Psychology

Background:

• Benzodiazepines' effects on attention are under-researched.
• Previous studies on spatial attention yielded inconsistent results.
• Attentional blink involves temporal processing difficulties.

Purpose of the Study:

• To investigate diazepam's impact on attentional shifting in the temporal domain.
• To determine if diazepam alters the duration of the attentional blink effect.

Main Methods:

• Healthy volunteers received placebo or diazepam (0.1 or 0.3 mg/kg).
• Participants performed a dual-task: identifying a city name (target) and a vehicle (probe).
• The attentional blink paradigm assessed target detection after a prior target within a specific temporal window.

Main Results:

• Diazepam significantly increased both the magnitude and duration of the attentional blink.
• High-dose diazepam prolonged the time needed to detect a probe after a target to over 600 ms.
• Dual-task performance was impaired by diazepam.

Conclusions:

• Therapeutic doses of diazepam affect temporal attentional shifting.
• Diazepam impairs the ability to process sequential information, particularly in dual-task scenarios.