Slide 26: Lower Pons

Identify:

• Motor Trigeminal Nucleus (5, seen best on right)
• Principal Sensory Trigeminal Nucleus (PV)
• Medial Lemniscus ML)
• Central Tegmental Tract (CTT)
• Medial Longitudinal Fasciculus (MLF)
• Tectospinal Tract (TST)
• Mesencephalic Trigeminal Tract and Nucleus (MesT)
• Pontine Gray (PG)
• Corticospinal Tract fibers (CST)
• Middle Cerebellar Peduncle (MCP)
• Superior Cerebellar Peduncle (SCP)
• Ventral Spinocerebellar Tract (VSCT)

Note:

• Note the VSCT entering the cerebellum via the SCP.
• The Superior Olivary Nucleus, Lateral Lemniscus, Spinothalamic Tract, Rubrospinal Tract, and Hypothalamo-Autonomic Tract are all crowded into the area lateral to the Central Tegmental Tract.