Enhancing Gait Biomechanics in Persons With Stroke: The Role of Functional Electrical Stimulation on Step-To-Step...

Area of Science:

• Biomechanics
• Neurorehabilitation
• Gait Analysis

Background:

• Stroke frequently causes gait impairments like foot drop and propulsion deficits, hindering walking.
• Conventional treatments often neglect muscle activation crucial for propulsion.
• Functional electrical stimulation (FES) shows promise for improving gait but its biomechanical effects on transitions need more study.

Purpose of the Study:

• To investigate the impact of FES on biomechanical parameters during step-to-step transitions in individuals with stroke.
• To evaluate FES effects on force distribution and center of mass control during gait.

Main Methods:

• A randomized crossover study involved 18 stroke survivors walking with and without FES.
• Kinematic data and ground reaction forces were collected.
• Key outcome measures included minimum vertical velocity of the center of mass (Vvmin) and the force ratio (FRatio).

Main Results:

• FES significantly reduced the force ratio (FRatio), indicating improved force distribution to the back foot.
• The minimum vertical velocity of the center of mass (Vvmin) occurred earlier with FES, showing better CoM redirection control.
• These improvements were statistically significant (p < 0.001).

Conclusions:

• FES application to lower limb muscles enhances gait biomechanics in stroke survivors.
• It improves force distribution and center of mass control during critical step-to-step transitions.
• FES may optimize walking efficiency and warrants further investigation for rehabilitation integration.