40. Brainstem -Posterior View
The posterior parts of the brainstem include the tectum (midbrain's roof with superior/inferior colliculi), the tegmentum, and crucial white matter tracts like the cerebellar peduncles, forming the dorsal surface alongside the fourth ventricle, while deeper structures like nuclei for cranial nerves (V-XII) and sensory pathways (gracile/cuneate fasciculi) reside within the pons and medulla, connecting to the cerebellum and spinal cord for vital functions.