text: 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.
option_0: Decussation of the pyramids
option_1: Tooth fusion
option_2: Sensory decussation
option_3: Labial fusion
option_4: Lamina of the vertebral arch
option_5: Symphysis pubis dysfunction
option_6: Germinal matrix hemorrhage
option_7: Ossification of the posterior longitudinal ligament