NEET PG DENTAL EXAM

Detailed explanation-1: -Decussation of the fibers (i.e., the crossing of fibers to the opposite side of the body) occurs at the level of the lower medulla, where 85 to 90% of the fibers cross to form the lateral corticospinal tract (LCST).

Detailed explanation-2: -The pyramidal decussation marks the border between the spinal cord and the medulla oblongata.

Detailed explanation-3: -Once it reaches the lower medulla, about 85 to 90% of the fibers will cross over or “decussate” at the pyramidal decussation to form the lateral corticospinal tract (LCST). They continue their descent in the lateral funiculus and terminate at all levels of the spinal cord.

Detailed explanation-4: -Two pyramid-shaped swellings are located on the medulla oblongata, on either side of its ventral (front) midline. More commonly referred to together as the brain stem, the pyramids are specifically located between the anterolateral sulcus and the anterior median fissure of the medulla.