Neural pathways of maternal responding: systematic review and meta-analysis

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Developmental Neuroscience

Background:

• Functional magnetic resonance imaging (fMRI) is increasingly used to investigate maternal responsiveness.
• Research aims to identify a dedicated neural network for maternal care behaviors.

Purpose of the Study:

• To systematically review and meta-analyze studies on maternal neural networks.
• To assess the evidence for a dedicated maternal brain network using visual infant stimuli.
• To determine the quality of evidence for specific neural responses in mothers.

Main Methods:

• Systematic literature review of studies involving healthy new mothers exposed to visual stimuli of their own versus other infants.
• Meta-analysis of fMRI data to identify consistently activated brain regions.
• Assessment of inter-study variability in neural responses.

Main Results:

• Systematic review identified specific brain areas activated by infant visual stimuli, including the left thalamus, pre-central gyrus, limbic lobe, uncus, amygdala, and caudate.
• These activated regions are involved in reward, attention, and emotion processing.
• Meta-analysis revealed a limited subset of consistently activated brain areas and considerable inter-study variability.

Conclusions:

• Evidence for a dedicated maternal neural network is limited, with significant variability across studies.
• Further research using functional imaging is needed to develop objective tools for assessing maternal care neural pathways.
• Such tools could aid in developing biomarkers for healthy maternal care and monitoring interventions.