Response inhibition during cue reactivity in problem gamblers: an fMRI study

Area of Science:

• Neuroscience
• Psychology
• Addiction Research

Background:

• Substance dependence is linked to disinhibition and altered reward salience.
• The role of these factors in pathological gambling remains unclear.
• Understanding affective stimulus effects on impulse control is crucial for problem gambling research.

Purpose of the Study:

• To investigate the impact of affective stimuli on response inhibition in problem gamblers (PRGs).
• To examine the interaction between response inhibition and salience attribution in PRGs compared to healthy controls (HCs).

Main Methods:

• An affective Go/Nogo task was administered to 16 PRGs and 15 HCs.
• Participants viewed neutral, gamble, positive, or negative affective pictures during Go trials.
• Brain activity (fMRI) and behavioral outcomes (errors, reaction times) were assessed.

Main Results:

• PRGs made fewer errors and were slower on gamble and positive trials compared to HCs.
• PRGs showed greater activation in prefrontal and striatal regions for gambling cues.
• Gambling or positive contexts reduced PRG brain activity and errors, indicating facilitated inhibition.

Conclusions:

• Gambling-related stimuli possess heightened salience for PRGs.
• PRGs may utilize compensatory neural activity for response inhibition.
• Affective contexts, particularly gambling-related ones, can enhance response inhibition in PRGs.