BOLD Response Selective to Flow-Motion in Very Young Infants.

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Visual Perception

Background:

• Adult motion perception relies on widespread cortical networks.
• Infant motion perception is rudimentary at birth and develops over years.
• Neural basis of infant visual motion processing remains largely unknown.

Purpose of the Study:

• To investigate the neural substrates of visual motion processing in infants.
• To determine the functional maturation of motion-selective cortical areas in early infancy.
• To explore functional connectivity within the infant motion processing network.

Main Methods:

• Utilized Blood Oxygenated Level Dependent (BOLD) imaging in 7-week-old infants.
• Presented visual stimuli: coherent motion (flow) versus random motion.
• Analyzed resting-state functional connectivity between cortical areas.

Main Results:

• Major cortical areas for motion processing are functional by 7 weeks of age.
• Adult-like functional connectivity observed between motion-selective associative areas.
• Connectivity is immature between primary cortex and other motion-related regions (temporo-occipital, posterior-insular).

Conclusions:

• Infant motion perception development may be constrained by slow maturation of subcortical inputs and cortico-cortical connections.
• Evidence suggests independent early input to primary visual cortex (V1) and the V5/MT+ complex.
• Cortical motion processing networks show early functional activation but delayed connectivity maturation.