Gait abnormalities in tibial nerve paralysis: a biomechanical study

Area of Science:

• Biomechanics
• Neurology

Background:

• Gastrocnemius-soleus dysfunction is common after neurological injuries.
• Temporary tibial nerve paralysis models these deficits for controlled study.

Purpose of the Study:

• To quantify gait abnormalities from gastrocnemius-soleus paralysis.
• To establish a baseline for evaluating orthotic interventions.

Main Methods:

• Six volunteers underwent a tibial nerve block.
• Gait parameters (motion, forces, timing, step length) were recorded pre- and post-block.

Main Results:

• Bilateral step length decreased, more on the unblocked side.
• Heel-off was delayed, and heel-strike occurred earlier.
• Reduced plantarflexion led to delayed center of pressure progression to prevent foot drop.

Conclusions:

• Tibial nerve paralysis significantly alters gait biomechanics.
• These findings provide a basis for assessing gait rehabilitation strategies.