Characteristic brain function and network activity patterns in adolescent first-episode depression: a resting-state...

Area of Science:

• Neuroscience
• Psychiatry
• Medical Imaging

Background:

• First-episode depression (FED) in adolescents has underexplored brain function and network patterns.
• Understanding these neural mechanisms is crucial for early diagnosis and intervention.

Purpose of the Study:

• To investigate cerebral function and network abnormalities in adolescent FED patients.
• Utilize Amplitude of Low-Frequency Fluctuations (ALFF), Fractional Amplitude of Low-Frequency Fluctuations (fALFF), and Independent Component Analysis (ICA) for analysis.

Main Methods:

• Recruited 36 adolescents with FED (PT group) and 34 healthy controls (HC group).
• Assessed depressive symptoms using the Hamilton Depression Rating Scale (HAMD) and Children's Depression Inventory (CDI).
• Conducted resting-state functional magnetic resonance imaging (rs-fMRI) and analyzed neuronal activity and network alterations.

Main Results:

• Adolescent FED patients showed increased ALFF in the left fusiform gyrus, left and right middle temporal gyri, and others.
• Elevated fALFF was observed in the right calcarine cortex, while decreased fALFF was found in the left superior temporal pole and left precuneus.
• Differences in visual network connectivity were identified, with hyperconnectivity in the right inferior temporal gyrus in the PT group.

Conclusions:

• Neurofunctional abnormalities in adolescent FED involve emotion-processing, executive control, and default mode networks.
• Aberrant activity in the temporal pole and superior frontal gyrus may worsen emotion dysregulation.
• The right middle occipital gyrus may be a distinctive biomarker for adolescent depression, suggesting potential therapeutic targets.