Question

surface anatomy of the spinal cord
what two grooves extend the length of the spinal cord and partially divide it into right and left halves?
longitudinal fissure and posterior median sulcus
anterior median fissure and posterior median sulcus
anterior median fissure and central sulcus
central sulcus and longitudinal fissure

Explanation:

The anterior median fissure is a deep groove on the anterior (front) surface of the spinal cord, and the posterior median sulcus is a shallower groove on the posterior (back) surface. Together, they partially divide the spinal cord into right and left halves. The other options either have incorrect names (e.g., "longitudinal fissure" is not the correct term here, the correct anterior one is "anterior median fissure") or incorrect pairings (e.g., "central sulcus" is not the correct posterior - related structure for this division).

Answer:

Anterior median fissure and posterior median sulcus