PMC7138930_01
Median and ulnar motor nerve conduction study with mid-palm recording. Fig. 1A-D showed the findings of cases 1, 2, 3 and 4 respectively. The second tracing in Fig. 1A showed CMAP with two components (bifid); the prior and the latter were responses of 1PI/2DI and 2Lum, respectively. Note that adding up the amplitude of 1PI/2DI responses evoked from ME (3.9 mV) and UE stimulations (4.3 mV) was close to the amplitude evoked from UW stimulation (8.6 mV). The second tracings in Fig. 1B, 1C and 1D showed superimposed responses, contributed by 2Lum and 1PI/2DI. In picture 1B, one may appreciate a triangle-shaped component, contributed by 1PI/2DI, on the top of the response. MW = median nerve stimulation at the wrist, ME = median nerve stimulation at the elbow (antecubital fossa), UW = ulnar nerve stimulation at the wrist, UE = ulnar nerve stimulation at the elbow (3 cm distal to medial humeral epicondyle), UAE = ulnar nerve stimulation above the elbow ( 7 cm proximal to medial humeral epicondyle), L = response of 2nd lumbrical muscle, I = response of 1st palmar and 2nd dorsal interosseous muscles, the numbers adjacent to each response indicated the CMAP amplitude in millivolt and the conduction velocity (CV) in meter per second. Stimulus intensities were shown in milliampere.
gr1.jpg
PMC7138930_04_gr1.jpg
f0005
The MGA (1DI and mid-palm) was demonstrated on the right side. (Fig. 1D, Supplementary Fig. 4 - Appendix 4.)
PMC7138930_02
Median and ulnar motor nerve conduction study with mid-palm recording. Fig. 1A-D showed the findings of cases 1, 2, 3 and 4 respectively. The second tracing in Fig. 1A showed CMAP with two components (bifid); the prior and the latter were responses of 1PI/2DI and 2Lum, respectively. Note that adding up the amplitude of 1PI/2DI responses evoked from ME (3.9 mV) and UE stimulations (4.3 mV) was close to the amplitude evoked from UW stimulation (8.6 mV). The second tracings in Fig. 1B, 1C and 1D showed superimposed responses, contributed by 2Lum and 1PI/2DI. In picture 1B, one may appreciate a triangle-shaped component, contributed by 1PI/2DI, on the top of the response. MW = median nerve stimulation at the wrist, ME = median nerve stimulation at the elbow (antecubital fossa), UW = ulnar nerve stimulation at the wrist, UE = ulnar nerve stimulation at the elbow (3 cm distal to medial humeral epicondyle), UAE = ulnar nerve stimulation above the elbow ( 7 cm proximal to medial humeral epicondyle), L = response of 2nd lumbrical muscle, I = response of 1st palmar and 2nd dorsal interosseous muscles, the numbers adjacent to each response indicated the CMAP amplitude in millivolt and the conduction velocity (CV) in meter per second. Stimulus intensities were shown in milliampere.
gr1.jpg
PMC7138930_04_gr1.jpg
f0005
The MGA (1DI and mid-palm) was demonstrated on the right side. (Fig. 1D, Supplementary Fig. 4 - Appendix 4.)
PMC7138930_03
Median and ulnar motor nerve conduction study with mid-palm recording. Fig. 1A-D showed the findings of cases 1, 2, 3 and 4 respectively. The second tracing in Fig. 1A showed CMAP with two components (bifid); the prior and the latter were responses of 1PI/2DI and 2Lum, respectively. Note that adding up the amplitude of 1PI/2DI responses evoked from ME (3.9 mV) and UE stimulations (4.3 mV) was close to the amplitude evoked from UW stimulation (8.6 mV). The second tracings in Fig. 1B, 1C and 1D showed superimposed responses, contributed by 2Lum and 1PI/2DI. In picture 1B, one may appreciate a triangle-shaped component, contributed by 1PI/2DI, on the top of the response. MW = median nerve stimulation at the wrist, ME = median nerve stimulation at the elbow (antecubital fossa), UW = ulnar nerve stimulation at the wrist, UE = ulnar nerve stimulation at the elbow (3 cm distal to medial humeral epicondyle), UAE = ulnar nerve stimulation above the elbow ( 7 cm proximal to medial humeral epicondyle), L = response of 2nd lumbrical muscle, I = response of 1st palmar and 2nd dorsal interosseous muscles, the numbers adjacent to each response indicated the CMAP amplitude in millivolt and the conduction velocity (CV) in meter per second. Stimulus intensities were shown in milliampere.
gr1.jpg
PMC7138930_04_gr1.jpg
f0005
The MGA (1DI and mid-palm) was demonstrated on the right side. (Fig. 1D, Supplementary Fig. 4 - Appendix 4.)
PMC7138930_04
Median and ulnar motor nerve conduction study with mid-palm recording. Fig. 1A-D showed the findings of cases 1, 2, 3 and 4 respectively. The second tracing in Fig. 1A showed CMAP with two components (bifid); the prior and the latter were responses of 1PI/2DI and 2Lum, respectively. Note that adding up the amplitude of 1PI/2DI responses evoked from ME (3.9 mV) and UE stimulations (4.3 mV) was close to the amplitude evoked from UW stimulation (8.6 mV). The second tracings in Fig. 1B, 1C and 1D showed superimposed responses, contributed by 2Lum and 1PI/2DI. In picture 1B, one may appreciate a triangle-shaped component, contributed by 1PI/2DI, on the top of the response. MW = median nerve stimulation at the wrist, ME = median nerve stimulation at the elbow (antecubital fossa), UW = ulnar nerve stimulation at the wrist, UE = ulnar nerve stimulation at the elbow (3 cm distal to medial humeral epicondyle), UAE = ulnar nerve stimulation above the elbow ( 7 cm proximal to medial humeral epicondyle), L = response of 2nd lumbrical muscle, I = response of 1st palmar and 2nd dorsal interosseous muscles, the numbers adjacent to each response indicated the CMAP amplitude in millivolt and the conduction velocity (CV) in meter per second. Stimulus intensities were shown in milliampere.
gr1.jpg
PMC7138930_04_gr1.jpg
f0005
The MGA (1DI and mid-palm) was demonstrated on the right side. (Fig. 1D, Supplementary Fig. 4 - Appendix 4.)