HRP was injected into the dorsal oblique muscle of rabbit.
将辣根过氧化物酶（ＨＲＰ）注射于兔侧眼上斜肌，结果显示：双侧滑车神经核和双侧三叉神经节均出现标记细胞，注射侧滑车神经核占５。