MICROANATOMY

Detailed explanation-1: -The roots of these nerves begin inside the vertebral column at the level of the L1 vertebra, where the cauda equina begins, and then descend into the sacrum. There are five paired sacral nerves, half of them arising through the sacrum on the left side and the other half on the right side.

Detailed explanation-2: -They begin as nerve roots that emerge from a segment of the spinal cord at a specific level. Each spinal cord segment has four roots: an anterior (ventral) and posterior (dorsal) root on both right and left sides. Each of these roots individually is composed of approximately eight nerve rootlets.