lta fiber) → 2° (Anterior white commissure → Lateral and Anterior Spinothalamic tract → Spinal lemniscus → VPL of Thalamus) → 3° (Postcentral gyrus) → 4° (Posterior parietal cortex)2° (Spinomesencephalic tract → Superior colliculus of Midbrain tectum)Slow/medial1° (Group C nerve fiber → Spinoreticular tract → Reticular formation) → 2° (MD of Thalamus) → 3° (Cingulate cortex)MotorPyramidalflexion: Primary motor cortex → Posterior limb of internal capsule → Decussation of pyramids → Corticospinal tract (Lateral, Anterior) → Neuromuscular junctionExtrapyramidalflexion:Primary motor cortex → Genu of internal capsule → Corticobulbar tract  → Facial motor nucleus → Facial musclesflexion:Red nucleus → Rubrospinal tractextension: Vestibulocerebellum →  Vestibular nuclei → Vestibulospinal tractextension: Vestibulocerebellum → Reticular formation → Reticulospinal tractMidbrain tectum → Tectospinal tract  → muscles of neckBasal gangliadirect:1° (Motor cortex → Striatum) → 2° (GPi