Gait Analysis in Rett Syndrome: Integrating Linear and Nonlinear Techniques.

Area of Science:

• Neuroscience
• Biomechanical Engineering
• Developmental Pediatrics

Background:

• Rett syndrome is a rare neurodevelopmental disorder affecting girls, characterized by significant impairments in walking and postural control.
• Understanding the specific gait abnormalities is crucial for developing effective therapeutic strategies.

Purpose of the Study:

• To quantitatively analyze and compare the gait characteristics of females with Rett syndrome and age-matched neurotypical controls.
• To identify specific lower limb kinematic patterns associated with gait deficits in Rett syndrome.

Main Methods:

• Bilateral sagittal plane joint angles (hip, knee, ankle) were analyzed in 22 females with Rett syndrome across three age groups and compared to controls.
• Gait parameters included joint range of motion, stride time, peak angular velocity, angle-angle diagrams, phase portrait areas, and asymmetries.

Main Results:

• Individuals with Rett syndrome exhibited reduced joint range of motion and angular velocity.
• Greater gait parameter asymmetries in Rett syndrome indicated disrupted bilateral coordination.
• Proximal joint coordination was preserved, but ankle movement showed increased variability, though resembling controls in older participants (9-14 years).

Conclusions:

• The study identifies distinct lower limb motion patterns contributing to gait impairments in Rett syndrome.
• Findings provide a basis for targeted interventions aimed at improving mobility and postural control in affected individuals.