Dorsal and Ventral Spinocerebellar Tracts (DSCT, VSCT)
Spinal Trigeminal Nucleus and Tract (SPTT, SPTN)
Spinothalamic Tract (STT)
Rubrospinal Tract (RST)
Hypothalamo-Autonomic Tract (HAT)
Inferior Olivary Complex (PO, MAO, DAO)
Lateral Reticular Nucleus (LRN)
Pyramidal Tracts (PT)
Internal Arcuate Fibers ((AF)
Medial Lemniscus (ML)
Medial Longitudinal Fasciculus (MLF)
Tectospinal Tract (TST)
Reticulo- and VestibuloSpinal Tracts (Rt+VST)
Note:
The Solitary Tract and its surrounding pale staining Nucleus (SN) function in the processing of visceral and sensory information that is carried into the brain by the Vagus (X), Glossopharyngeal (IX), and Facial (VII) nerves.
The Central Canal has moved dorsally towards the deepening groove between the two Gracile Tubercles, and at this level (Obex) is just "opening up" into the caudal part of the 4th Ventricle.
The Dorsal Spinocerebellar Tract DSCT) has moved dorsally and now overlies the Spinal Trigeminal Tract (SpTTr) and Lateral Cuneate Nucleus (LCN).
The Lateral Cuneate Nucleus (LCN) is considered homologous to the Dorsal Nucleus (of Clarke) of the spinal cord, since it receives afferent, sensory fibers conveying muscle stretch information from cervical and upper thoracic roots via the Dorsal Column. Axons from this nucleus course through the Inferior Cerebellar Peduncle into the Cerebellum.
The neurons of the Inferior Olivary Complex (Principal Olive (PO), Medial Accessory Olive (MAO), and Dorsal Accessory Olive (DAO) give rise to axons which cross the midline and course to their destination in the contralateral Cerebellum via the Inferior Cerebellar Peduncle.
