Modafinil Decreased Thalamic Activation in Auditory Emotional Processing: A Randomized Controlled Functional Magnetic...

Area of Science:

• Neuroscience
• Cognitive Psychology
• Psychopharmacology

Background:

• Modafinil enhances wakefulness and attention but can cause emotional instability.
• Previous research suggests modafinil's side effects may stem from altered emotional recognition.
• The neural underpinnings of modafinil's effects on emotional processing remain unclear.

Purpose of the Study:

• To investigate the impact of modafinil on the neural basis of auditory emotional processing using functional magnetic resonance imaging (fMRI).

Main Methods:

• A placebo-controlled, within-subject crossover design was employed.
• Functional magnetic resonance imaging (fMRI) was used to assess brain activity.
• Task performance and cerebral activation during an emotional judgment task were analyzed in 14 participants.

Main Results:

• Modafinil significantly decreased task accuracy and delayed response times for emotional judgments compared to placebo.
• Modafinil led to significantly reduced right thalamic activation during auditory emotional processing.
• The reduction in right thalamic activation correlated positively with emotional judgment accuracy.

Conclusions:

• Modafinil affects right thalamic function, altering behavior and brain activity in auditory emotional processing.
• These findings suggest modafinil may impair emotional recognition by diminishing emotional activation crucial for social communication.