Freezing of gait (FoG) in Parkinson's disease is “a brief, episodic absence or marked reduction of forward progression of the feet despite the intention to walk”. It is a common symptom in 50-80 % of the patients, occurring most frequently during turning, when passing through narrow paths or overcoming an obstacle, and is strongly affected by cognitive aspects such as attention, stress or anxiety. Having a strong correlation with falls, FoG is considered as one of the most dangerous symptoms, with severe effects on autonomy and Quality of Life (QoL). Due to the great variability of FoG features , treatments have to be patient-specific.