Behavioural Neurology / 2018 / Article / Tab 2

Research Article

Hand Dexterity Impairment in Patients with Cervical Myelopathy: A New Quantitative Assessment Using a Natural Prehension Movement

Table 2

Summarized data from prehension movement analysis and JOA score.

ParameterControlPatient
PreopPostop

Number male/female30 12/1823 15/815 12/3
Age63.4 ± 17.265.0 ± 14.863.9 ± 15.8
Reach-to-grasp movement
 Reaction time [RT] (sec)0.53 ± 0.190.50 ± 0.240.46 ± 0.22 (0.52 ± 0.25)
 Movement time [MT] (sec)1.01 ± 0.371.12 ± 0.430.94 ± 0.32 (1.15 ± 0.55)
 Maximum grip aperture [MGA] (cm)9.71 ± 1.3511.4 ± 2.4611.7 ± 2.62 (11.5 ± 2.53)
 Time of maximum grip aperture [ToMGA] (ms)0.67 ± 0.280.89 ± 0.350.78 ± 0.33 (0.91 ± 0.44)
 Position of maximum grip aperture [PoMGA] (cm)4.58 ± 5.091.55 ± 0.961.27 ± 0.67 (1.43 ± 0.70)
 Normalized movement distance [NMD]1.22 ± 0.181.11 ± 0.071.08 ± 0.05 (1.10 ± 0.08)
Grip force (N)
 Sandpaper4.18 ± 3.563.88 ± 2.083.88 ± 2.08
 Suede4.68 ± 3.813.86 ± 1.683.73 ± 1.84 (4.24 ± 1.82)
 Silk6.39 ± 4.274.79 ± 1.944.34 ± 2.84 (5.06 ± 2.14)
JOA score
 Motor function of fingers1.91 ± 1.122.40 ± 1.12 (2.13 ± 1.25)
 Sensory function of the upper extremity1.11 ± 0.501.37 ± 0.52 (1.10 ± 0.47)
 Total (motor + sensory)3.02 ± 1.313.77 ± 1.28 (3.23 ± 1.55)

Values are expressed as mean ± SD. JOA test was not performed for normal controls (−). Values in parentheses indicate preoperative values of 15 patients.Statistically significant difference from control (, Welch two sample -test). Statistically significant difference from control (, Welch two sample -test). Statistically significant difference from control (, Wilcoxon rank-sum test). Statistically significant different from preoperation (, paired sample -test).