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Inverse Association of Locus Coeruleus MRI Integrity With Structural Volume and Its Impact on Individual's
Joshua Neal1, Sun Hyung Kim2, Benjamin Katz3,4
1Department of Psychology, Virginia Tech, Blacksburg, VA, USA.
Human Brain Mapping
|November 25, 2025
Summary
Altered structure in the locus coeruleus (LC), a brainstem region, is linked to attention problems. Specifically, right-hemisphere LC integrity negatively correlates with inattention scores.
Area of Science:
- Neuroscience
- Neuroimaging
- Psychiatry
Background:
- The locus coeruleus (LC) is a key brainstem nucleus involved in arousal and norepinephrine production.
- Neurological conditions impacting attention are often linked to neurotransmitter system abnormalities.
- Investigating the LC's role in attention deficits is crucial for understanding neurological disorders.
Purpose of the Study:
- To investigate the association between locus coeruleus (LC) structure and inattentive behavior.
- To explore the relationship between neuromelanin contrast ratios, LC volume, and attention deficits.
Main Methods:
- Regression analyses were performed on 141 participants (ages 8-54).
- Neuromelanin contrast ratios and LC volume were used as imaging markers.
- Mediation modeling examined the link between LC structure and inattentive behavior.
Main Results:
- Right-hemisphere LC structural integrity showed a significant negative association with inattention scores.
- Right-hemisphere LC volume was significantly positively associated with inattention.
- An inverse relationship was observed between LC structural integrity and volume.
Conclusions:
- LC structural integrity and volume are significantly associated with attention-related behavior.
- Findings highlight the role of the locus coeruleus in attention through neuromelanin-sensitive and structural imaging.
- The study has implications for understanding the interplay between regional brain structure and function in attention deficits.
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