Research Article

Motor Evoked Potentials after Supraspinal Stimulation in Pre- and Postoperative Evaluations of Patients with Cervical Radiculopathy

Table 4

Results of the Wilcoxon matched-pairs test, which show significant differences (bold field) between the individual values of parameters determining root conduction in the pre- and postoperative evaluations, with groups divided by spinal root damage revealed in the MRI scan.

Spinal root damageAmp.  
MEP DP
Lat.   
MEP DP
Amp.   
MEP BB
Lat.   
MEP BB
Amp.   
MEP TB
Lat.   
MEP TB
Amp.MEP APBLat.   
MEP APB
F min. APBFreq. F APBFCT APBRxCT APB

C5 (n=9)0.01170.29360.01170.1508nrnrnrnrnrnrnrnr
C6 (n=27)0.02510.04960.07960.0011nrnrnrnrnrnrnrnr
C7 (n=26)nrnrnrnr0.13290.05820.02090.37190.44590.96450.25750.2959

C8 (n=9)nrnrnrnr0.24210.06710.06120.09680.24390.07240.06950.4112

Amp. MEP: MEP amplitude after supraspinal magnetic stimulation, Lat. MEP: motor evoked potential latency after supraspinal magnetic stimulation, F min. APB: minimum F-wave latency after stimulation of the median nerve motor fibres recorded from the abductor pollicis brevis muscle, Freq. F APB: F-wave frequency after stimulation of the median nerve motor fibres and recording from the abductor pollicis brevis muscle, FCT APB: F conduction time after stimulation of motor fibres of the median nerve and recording from the abductor pollicis brevis, RxCT APB: root conduction time for motor fibres of the median nerve, DP: deltoid posterior, BB: biceps brachii, TB: triceps brachii, and nr: nonrecorded