Sensory decussation

The dorsal column nuclei are responsible for fine touch, vibration, proprioception and two-point discrimination.

The fibers of this decussation are called the internal arcuate fibers and are found at the superior aspect of the closed medulla oblongata, superior to the motor decussation.

Unlike other ascending tracts of the brain, fibres of the medial lemniscus do not give off collateral branches as they travel along the brainstem.

[1] The fibres that make up the sensory decussation are responsible for fine touch, proprioception and two-point discrimination of the whole body excluding the head.

[1] This article incorporates text in the public domain from page 777 of the 20th edition of Gray's Anatomy (1918) 2° (Spinomesencephalic tract → Superior colliculus of Midbrain tectum)

The figure shows the cross section of the closed medulla at the level of the sensory decussation. Number 9 illustrates the sensory decussation at the posterior column.