Evaluation of Cerebral White Matter in Prelingually Deaf Children Using Diffusion Tensor Imaging

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Neuroimaging

Background:

• White matter development is crucial for cognitive functions.
• Prelingual deafness can impact brain development.
• Understanding neurodevelopmental trajectories in deaf children is essential.

Purpose of the Study:

• To compare white matter development between prelingually deaf and normal-hearing children.
• To investigate age-related changes in white matter integrity in both groups.
• To identify specific white matter tracts affected by early deafness.

Main Methods:

• Diffusion Tensor Imaging (DTI) was used to acquire brain imaging data.
• Tract-Based Spatial Statistics (TBSS) was employed for group comparisons and correlation analyses.
• Fractional Anisotropy (FA) values were analyzed to assess white matter integrity.

Main Results:

• Prelingually deaf children showed significantly lower FA values in several white matter tracts (Heschl's gyrus, inferior frontooccipital fasciculus, uncinate fasciculus, superior longitudinal fasciculus, forceps major) compared to normal-hearing children under four years old.
• These differences in FA were not significant in older children (above four years).
• Age-related white matter development may extend up to eight years in deaf children.

Conclusions:

• Development of cerebral white matter tracts appears to be delayed in children with prelingual deafness.
• Early deafness may influence the timing and trajectory of white matter maturation.
• These findings highlight potential neurodevelopmental differences associated with hearing status from an early age.