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      EG: Experimental Group, CG: Control Group, FOG: Freezing Of Gait, FOG-Q: Freezing Of Gait Questionnaire, UPDRS: Unified Parkinson’s Disease Rating Scale, TUG:
    Timed UP And Go Test, 10M-WT: 10-Meter Walking Test, BBS: Berg Balance Scale, PDQ-39: 39-Item PD Questionnaire
        | Authors (Published years) | The number of subjects | Disease | Inclusion criteria | Material of observation | Duration of treatment | Assessment of treatment | Outcome |  
        | Pelosin et al. (2013) | 38 (10EG, 10CG, 8sham 10on/off) 14 normal control(7EG, 7CG) | Parkinson's disease (Bradykinesia of finger movement) | Hoehn & Yahr=1~3 MMSE≧24 | watch a 6 min video of repetitive finger movements consisting of the opposition of    thumb to index, medium, ring, and little fingers, paced at 3 Hz | One session (6min) | Spontaneous movement rate  of self-paced finger movement, Kinematic parameters    describing motor performance (intertapping interval and touch duration) | Improvement of the spontaneous rate and reducing the intertapping interval to a larger    extent in 45 minutes and 2 days after training. |  
        | Buccino    et al. (2011) | 15    (7EG, 8CG) | Parkinson's    disease | Hoehn & Yahr=1.5~4 18-75years MMSE≧24 no depression | observe and subsequently execute, different daily actions presented through video    clips | NR | UPDRS, FIM | Improvement of UPDRS, FIM |  
        | Pelosin et al. (2010) | 20 (9EG, 9CG, 2 patients were excluded) | Parkinson's disease (freezing of gait) | Occurrence of freezing at least once a week (minimum score of 2 on item 3 of the    FOG-Q, MMSE≧24 | observe 6 video clips (each clip lasting 6 min showing strategies useful) in    circumventing FOG episode (2 video clips/session) | 60 min/day (observation: 24min, practice: 36min, no imitation), 4 weeks (3    sessions/week) | FOG-Q, FOG diary, TUG, 10M-WT, BBS, Tinetti Scale (partⅠ,Ⅱ), PDQ-39 | FOG-Q    was reduced in both groups. Reduction    in the number of freezing of gait episodes at 4 weeks follow-up after end of    training period in EG. |  |