LAUSR

Objective The aim of this study was to evaluate the motor unit number, voluntary and reflex force produced by alpha motor neuron excitability in spasticity. For this purpose, electrophysiological and dynamic measurements were taken from spasticity cases and healthy participants. Method Patient group consisted of 20 spasticity and healthy group consisted of 20 healthy individuals. The force values produced by triggering the Patella T reflex were calculated via the acceleration sensor. For calculation of the force at the Patellar Tendon during Patellar Reflex triggered force production, we used fundamental principle of leverage with acceleration sensor data. The force obtained by this measurement is defined as reflexive force. Motor unit numbers of participants were evaluated according to MUNIX algorithm. Results There were statistically significant differences between the spasticity cases and healthy control group both for motor unit number and the high level voluntary force production and the force generated by reflex triggering ( p Discussion This study shows that such combined methods, which allows the evaluation of the alpha motor neuron pool, as well as the kinesiological and electrophysiological parameters, are tools that cannot be overlooked in understanding spasticity. Conclusion Motor unit number and force generation were evaluated in spasticity and healthy individuals and statistically significance differences in these features were obtained between two groups. Significance Motor unit number of rectus femoris muscle in spasticity is measured by MUNIX algorithm. Evaluating of voluntary and reflex-generated force with motor unit number have a potential tool for investigating spasticity.