Table 5.

The relationship between the involvement of disc level and CMCTs.

The involvement of disc level	CMCT-ADM	CMCT-APB	CMCT-AH
Rostral to the C5–6	×	×	×
Rostral to the C6–7	○	×	×
From the C7–T1 to the T11–12	○	○	×

APB, abductor pollicis brevis; ADM, abductor digiti minimi; CMCT, central motor conduction time; ×: prolonged; ○: not prolonged.