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Intranasal Oxytocin Increases Head Motion During Functional MRI Scanning.

Sydney Houlton¹, Jatin G Vaidya², Patrick Breheny³

¹Department of Pediatrics, University of Iowa, Iowa City Iowa, USA.

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|February 26, 2024

Summary

This summary is machine-generated.

Intranasal oxytocin increased head motion during functional MRI scans, potentially confounding results. This effect was more pronounced in healthy mothers than those with addiction.

Keywords:

addiction framewise displacement functional MRI head motion oxytocin

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Area of Science:

Neuroscience
Psychopharmacology

Background:

Oxytocin, a neuropeptide, influences social behaviors.
Intranasal oxytocin is frequently used in functional MRI (fMRI) studies of brain activity.
Head motion is a critical confound in fMRI data acquisition.

Approach:

A double-blind, placebo-controlled crossover study investigated head motion in 24 mothers with drug addiction and 22 healthy controls.
Participants received intranasal oxytocin or placebo before viewing infant faces.
Head motion was quantified using framewise displacement.

Key Points:

Intranasal oxytocin administration was associated with increased head motion (exceeding 3 mm framewise displacement), independent of participant group.
The addiction group exhibited higher overall head motion compared to controls, irrespective of oxytocin or placebo.
Oxytocin's effect on mean head motion was significant only in the addiction group, indicating a group-by-condition interaction.

Conclusions:

Intranasal oxytocin may confound fMRI results by independently increasing head motion.
Findings suggest careful consideration of head motion artifacts in oxytocin fMRI research, particularly in clinical populations.
Replication in diverse clinical populations is recommended.