Gait initiation in children with Rett syndrome

Area of Science:

• Neuroscience
• Developmental Biology
• Biophysics

Background:

• Rett syndrome is an X-linked neurodevelopmental disorder.
• Gait abnormalities are a key characteristic of Rett syndrome.
• Gait initiation involves complex, centrally mediated motor programs.

Purpose of the Study:

• To investigate anticipatory postural adjustments during gait initiation in girls with Rett syndrome.
• To compare motor control strategies between individuals with Rett syndrome and healthy controls.
• To identify specific impairments in gait initiation related to Rett syndrome.

Main Methods:

• Electromyography of tibialis anterior and soleus muscles.
• Measurement of ground reaction forces.
• Analysis of body kinematics during gait initiation.

Main Results:

• Girls with Rett syndrome demonstrated impaired temporal organization of anticipatory postural adjustments.
• Deficits in temporal scaling led to reduced forward propulsion and altered first step parameters.
• Abnormal muscle activation patterns, including disrupted synergistic activity, were observed.

Conclusions:

• Girls with Rett syndrome exhibit significant impairments in the feedforward control of gait initiation.
• The findings highlight a lack of accurate tuning in motor control mechanisms.
• This study provides insights into the motor deficits associated with Rett syndrome.