The two<unk>  contain the motor fibers that pass from the brain to the medulla oblongata and medulla spinalis, corticobulbar and corticospinal fibers.
When these<unk> l fibers are traced downward, it is found that some two-thirds or more of them leave the<unk>  in successive bundles, and decussate in the anterior median fissure of the medulla oblongata, forming what is termed the<unk> l decussation.
Having crossed the middle line, they pass down in the posterior part of the lateral funiculus as the lateral cerebrospinal fasciculus.
Decussation of the pyramids
Tooth fusion
Sensory decussation
Labial fusion
Lamina of the vertebral arch
Symphysis pubis dysfunction
Germinal matrix hemorrhage
Ossification of the posterior longitudinal ligament