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Catecholamines and attention. II: Pharmacological studies in normal humans
C R Clark1, G M Geffen, L B Geffen
1Psychophysiology Laboratory, Flinders University of South Australia, Bedford Park.
Neuroscience and Biobehavioral Reviews
|January 1, 1987
Summary
This review explores how catecholamine-active drugs affect attention in adults. Findings suggest noradrenaline and dopamine may modulate different stages of information processing, impacting cognitive capacity.
Area of Science:
- Neuroscience
- Cognitive Psychology
Background:
- Previous research indicates catecholamines play a role in attention control.
- This review focuses on the acute effects of catecholamine-active drugs on attention in healthy adults.
Purpose of the Study:
- To systematically examine the effects of specific catecholamine-active drugs on attention measures.
- To interpret these effects within a general capacity model of information processing.
Main Methods:
- Systematic review of studies on catecholamine-active drugs.
- Analysis of behavioral indices, subjective states, and measures of activation and arousal.
Main Results:
- Droperidol (dopamine antagonist) and clonidine (alpha agonist) had similar effects on processing capacity and perceived effort.
- These drugs differentially affected subjective state, activation, and arousal.
Conclusions:
- Results support the hypothesis that central noradrenaline and dopamine modulate distinct phases of human information processing.
- Noradrenaline may influence early processing, while dopamine may influence later processing stages.