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Cocaine effects on electroencephalographic cognitive event-related potentials and performance
Electroencephalography and Clinical Neurophysiology
|January 1, 1987
Summary
Cocaine use increased specific brainwave amplitudes (N100 and CNV) in healthy volunteers performing a task. This suggests cocaine may mobilize attentional resources despite its distracting effects.
Area of Science:
- Neuroscience
- Psychopharmacology
Background:
- Cocaine is a stimulant with known effects on the central nervous system.
- Understanding cocaine's impact on cognitive functions like information processing and motor performance is crucial.
Purpose of the Study:
- To investigate the effects of oral cocaine hydrochloride on electroencephalographic (EEG) indices.
- To assess cocaine's influence on information processing and motor performance.
Main Methods:
- A double-blind, counterbalanced crossover study involving 12 healthy volunteers.
- Administration of a 3 mg/kg oral dose of cocaine hydrochloride or placebo.
- Testing with an auditory continuous performance task, with EEG recorded at specific intervals.
Main Results:
- Cocaine significantly increased N100 amplitude for the warning stimulus and the contingent negative variation (CNV) amplitude.
- No significant alterations were observed in P300 amplitude or latency, reaction time, or sensory sensitivity (d').
Conclusions:
- The observed increase in N100 and CNV amplitudes may indicate the mobilization of additional attentional resources.
- This attentional shift could be a compensatory mechanism to maintain optimal performance amidst cocaine-induced distractions.