Lorazepam induces multiple disturbances in selective attention: attentional overload, decrement in target processing...

Area of Science:

• Cognitive Neuroscience
• Psychopharmacology

Background:

• Benzodiazepines are known to affect attention, but detailed investigations are limited.
• Lorazepam, a common benzodiazepine, requires further study regarding its specific attentional impacts.

Purpose of the Study:

• To investigate the effects of a single Lorazepam dose on performance in a time-constrained target cancellation task.
• To analyze specific attentional impairments, including target detection, distractor rejection, and response bias.

Main Methods:

• A single dose of Lorazepam was administered to participants.
• Performance was assessed using a target cancellation task measuring correct detections, misses, and false positives.
• Signal detection analysis was employed to evaluate perceptual discrimination and response bias.

Main Results:

• Lorazepam significantly impaired performance, particularly early in the task, suggesting attentional resource depletion.
• Target detection was more affected than distractor processing.
• Misses increased under Lorazepam, while false positives remained unchanged.
• Signal detection analysis indicated decreased perceptual discrimination and increased response bias.

Conclusions:

• Lorazepam exerts multiple detrimental effects on selective attention.
• These impairments include reduced attentional resource availability, diminished target processing, and altered response strategies.
• The findings provide novel insights into how Lorazepam impacts cognitive performance.