Randomized clinical trial with blinding of the subject, the evaluator and the person analyzing the data.~In the experimental group will be performed neural mobilitazion technique, while in the sham a technique to mimic neurodynamic.~The assessment will be made by a single evaluator.
The main objective:~To determine changes in physiological and structural properties of upper limb muscles with spasticity in patients with acquired brain injury after applying neural mobilization improving their functional performance, their participation in society and quality of life.~Hypothesis:~Peripheral nerve mobilizations performed with neurodynamic techniques in upper limb in patients with acquired brain injury, generate changes at structural and physiological level, favoring the performance of daily life activities and improving the quality of life.