Segmental muscle vibration improves walking in chronic stroke patients with foot drop: a randomized controlled trial.
BACKGROUND
Studies have described the effects of segmental muscle vibration (SMV) on brain plasticity and corticomotor excitability. Information on the treatment-induced effects of SMV in stroke patients is, however, still limited.


OBJECTIVE
To assess whether the application of SMV to ankle dorsiflexor muscles of chronic stroke patients can improve walking.


METHODS
Forty-four patients were randomly assigned to either an experimental group (EG) or a control group (CG) and underwent 12 sessions over 4 weeks of general physical therapy. Patients in the EG also received SMV at 120 Hz over the peroneus longus and tibialis anterior for 30 minutes at the end of each session. All the participants underwent pretreatment and posttreatment gait analysis assessments. Time-distance, kinematic, and surface electromyography (EMG) data were used as outcome measures.


RESULTS
A moderate improvement in mean gait speed, normal-side swing velocity, bilateral stride length, and normal-side toe-off percentage was observed only in the EG. A significant increase in bilateral ankle dorsiflexion angle at heel contact was associated with increased maximum ankle dorsiflexion and plantarflexion degrees during the swing phase on the paretic side after treatment in EG. Surface EMG during the swing phase revealed a significant increase in the activation of the tibialis anterior muscle on the paretic side in the posttreatment assessment in the EG.


CONCLUSIONS
SMV added to general physical therapy may improve gait performance in patients with foot drop secondary to chronic stroke. The authors hypothesize that this may be due to the mechanical vibration stimulation, probably as a consequence of effective brain reorganization.
Azienda Policlinico Umberto I, Rome, Italy. paolonim@tin.it
Marco
M
Paoloni
Massimiliano
M
Mangone
Paola
P
Scettri
Rita
R
Procaccianti
Antonella
A
Cometa
Valter
V
Santilli
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D000842:Ankle / Q000503:physiopathology*; D002908:Chronic Disease; D004576:Electromyography; D005081:Exercise Therapy / Q000379:methods*; D005260:Female; D005528:Foot / Q000503:physiopathology*; D005684:Gait; D006801:Humans; D008297:Male; D008875:Middle Aged; D010291:Paresis / Q000209:etiology / Q000503:physiopathology / Q000534:rehabilitation*; D020127:Recovery of Function; D020521:Stroke / Q000150:complications / Q000503:physiopathology; D000071939:Stroke Rehabilitation; D013997:Time Factors; D016896:Treatment Outcome; D016138:Walking