Altered corpus callosum structure in adolescents with cerebral palsy: connection to gait and balance

Area of Science:

• Neuroscience
• Developmental Pediatrics
• Radiology

Background:

• Cerebral palsy (CP) is a common childhood motor disorder.
• Impaired sensorimotor function in CP is linked to white matter (WM) abnormalities, particularly in the corpus callosum (CC).
• The specific relationship between CC structure and lower extremity motor control (gait, balance) in CP is not well understood.

Purpose of the Study:

• To investigate the association between transcallosal white matter (WM) structure and lower limb motor stability in adolescents with spastic hemiplegic or diplegic cerebral palsy (CP).
• To compare WM structure and motor stability between CP subgroups and age-matched controls.

Main Methods:

• Diffusion-weighted MRI was used to analyze the diffusivity properties of seven CC subparts and the transcallosal sensorimotor tract in adolescents (10-18 years) with CP (n=31) and controls (n=34).
• Measures included cross-sectional area, fractional anisotropy, and mean diffusivity.
• Lower limb motor stability was assessed for static and dynamic balance.

Main Results:

• Adolescents with CP exhibited significant impairments in CC and sensorimotor tract WM integrity (cross-sectional area, fractional anisotropy, mean diffusivity) compared to controls.
• WM alterations differed between hemiplegic and diplegic CP subgroups, notably in fractional anisotropy along the sensorimotor tract.
• Transcallosal WM diffusion properties correlated with static stability in all participants and dynamic stability in healthy controls.

Conclusions:

• This study elucidates the corpus callosum's role in motor stability for adolescents with and without cerebral palsy.
• Findings highlight the intricate connection between white matter organization and motor performance, offering potential for improved clinical diagnosis and targeted rehabilitation strategies in CP.