Structural MRI alterations in children with form-deprivation amblyopia: a propensity score-matched case-control study

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Neuroimaging

Background:

• Form-deprivation amblyopia (FDAM) is a severe neurodevelopmental disorder resulting from early visual deprivation.
• Understanding the neuroanatomical underpinnings of FDAM is crucial for developing effective interventions.

Purpose of the Study:

• To investigate the neuroanatomical correlates of form-deprivation amblyopia (FDAM) using T1-weighted magnetic resonance imaging (MRI).

Main Methods:

• 18 Chinese children with bilateral FDAM and 36 matched healthy controls underwent 3.0T T1-weighted MRI.
• Cortical and subcortical structures were analyzed using FreeSurfer V.7.3.2 with multiatlas parcellation.
• Linear regression models were used for group comparisons, with Bonferroni correction applied.

Main Results:

• FDAM showed widespread structural alterations, including primary visual cortex thinning and atrophy in visual, language, and somatosensory networks.
• Subcortical degeneration was observed in the lateral geniculate and pulvinar nuclei, globus pallidus, and amygdalar substructures.
• Thinning was also noted in cognitive control networks, such as the inferior frontal sulcus.

Conclusions:

• FDAM involves multisystem neural disruptions across multiple brain networks, extending beyond visual processing.
• These findings underscore the complexity of FDAM and suggest the need for further mechanistic research.
• The study highlights the impact of early visual deprivation on brain development.