Effects of Hand Vibration on Motor Output in Chronic Hemiparesis

Table 2

Spearman correlation coefficients of motor output versus motor function and sensory evaluation.

	MEP amplitude		MVC		d/dtmax
Tests	Before vibration	During vibration	Before vibration	During vibration	Before vibration	During vibration
MEP amplitude
During vibration	0.87^‡
MVC
Before vibration	0.71^†	0.68^†
During vibration	0.66^†	0.69^†	0.96^‡
d/d
Before vibration	0.71^†	0.58^*	0.90^‡	0.82^‡
During vibration	0.67^†	0.60^*	0.77^‡	0.78^‡	0.73^‡
Spasticity and hand function
FM hand	0.87^‡	0.81^‡	0.74^‡	0.71^‡	0.77^‡	0.56^*
Spasticity	−0.69^†	−0.62^*	−0.61^*	−0.64^†	−0.67^†	−0.64^†
BB hemi.	0.88^‡	0.85^‡	0.73^‡	0.72^‡	0.76^‡	0.64^†
NHP hemi.	−0.82^†	−0.66^†	−0.76^‡	−0.75^‡	−0.81^‡	−0.69^‡
Sensory evaluation
Proprioception	0.08	0.23	0.36	0.47	0.26	0.18
Tuning fork 128 Hz	−0.07	0.18	0.35	0.36	0.34	0.23
Semmes Weinstein	−0.03	−0.26	−0.21	−0.31	0.02	−0.11
Vibration threshold	0.05	−0.17	−0.11	−0.08	−0.06	0.05

MEP, motor evoked potential; MVC, maximal voluntary contraction; d/d, maximal rate of force production; FM, Fugl-Meyer; BB, Box and Block; NHP, Nine Hole Peg. Correlations with MEP: ; correlations without MEP: .
; ; .