The first high-density area is located slightly ventrally at the rostral side, the second one slightly dorsally at the temporal side.
第一高密度区位于视网膜鼻侧偏腹方，第二高密度区位于颞侧偏背方。
2
Objective To study the sensory evoked potential which could show the lesion on the spinal cord ventrally, and evaluate its application in clinical practice.