Reliability of Ankle Musculature Latnency, Peak and Time of Activation Measurments to Sudden Extenal Frontal Perturbation

The purpose of this study was to demonstrate the reliability of ankle musculature latency, peak and time of activation measurements on a tilting platform (APS) to sudden external frontal perturbation under different conditions. Design. The latency, peak & time of activation of 10 healthy and 10 patients with functional ankle instability(FAI) was examined in an methodological study. The latency, peak and time of activation after sudden inversion of the ankle were determined by APS and surface EMG. The range of ICC Values for latency of Peroneus Longus (0.71-0.97), Tibialis Anterior (0.75-0.99), Peroneus Brevis (0.83-0.99) and Soleus (0.97-0.99) were obtained.These values for peak of activation of Peroneus Longus (0.81-0.99), Tibialis Anterior (0.9-0.99), Peroneus Brevis (0.64-0.99), Soleus(0.98-0.99)and for time of activation of Peroneus Longus (0.89-0.99) Tibialis Anterior (0.71-0.99) Peroneus Brevis (0.91-0.99) and Soleus (0.69-0.99) were calculated. Determination of The latency, peak and time of activation was proven as a reliable measurement method.