Midbrain at Inferior Colliculus - IV Nucleus
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Sensory Nuclei:
Inferior Colliculus
Mesencephalic (nucleus & tract)

Motor Nuclei:
Trochlear
Substantia Nigra

Reticular Formation:
Locus ceruleus
Raphe - (central superior)
Tracts:
Crus Cerebri:
Corticospinal
Corticobulbar (and Corticoreticular)
Corticopontine

Medial lemniscus
Lateral lemniscus
Spinothalamics

Trigeminothalamics:
Dorsal tract
Ventral tract
Central tegmental tract
MLF (secondary vestibular & internuclear fibers)
Decussation of superior cerebellar peduncle (cerebello-rubro thalamics)

Other:
Periaqueductal gray
Inferior colliculi
Tectum

Cerebral peduncle:
Tegmentum
Substantia nigra
Crus cerebri

Interpeduncular fossa
CN III fibers
Cerebral aqueduct
CN IV fascicles