Enhancing Social Cognition in Mild Cognitive Impairment with Non-Invasive Brain Stimulation: A Randomized Clinical...

Area of Science:

• Neuroscience
• Cognitive Science

Background:

• The efficacy of non-invasive neuromodulation for enhancing social cognition (SC) in neurological disorders is not well-established.
• Repetitive transcranial magnetic stimulation (rTMS) demonstrates potential for treating cognitive deficits by fostering neuroplasticity.

Purpose of the Study:

• To investigate the effects of high-frequency rTMS on the medial prefrontal cortex (mPFC) and right temporal parietal junction (rTPJ) in patients with mild cognitive impairment (MCI).
• To assess the impact of rTMS on social cognition (SC) and related cognitive/functional abilities, including maintenance effects post-intervention.

Main Methods:

• A randomized, double-blind, sham-controlled study involving 24 MCI patients.
• Participants were assigned to a Real-Real (RR) or Sham-Real (SR) group, receiving 4 weeks of rTMS or a combination of sham and real rTMS.
• Cognitive and functional assessments were conducted at baseline, week 2, week 4, and 8 weeks post-intervention.

Main Results:

• The RR group showed significant improvements in empathy, emotion recognition, social behavior (SB), and executive function after 2 weeks of rTMS.
• Emotion recognition further improved after 4 weeks, with benefits sustained at follow-up.
• Both groups demonstrated improvements in attention, mobility, and quality of life over time.

Conclusions:

• Excitatory rTMS targeting the mPFC and rTPJ shows promise for sustained improvement of social cognition and associated functions in the MCI population.
• The findings suggest rTMS as a potential therapeutic intervention for cognitive deficits in MCI.
• Higher education levels correlated with greater improvements in social behavior within the rTMS group.