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
Corticoreticular
Corticopontine
spacer
Medial lemniscus
Lateral lemniscus
Brachium of inferior colliculus
Commissure of inferior colliculus
Spinothalamics

Trigeminothalamics:
Dorsal tract
Ventral tract

Central tegmental tract
MLF (secondary vestibular & internuclear fibers)
Cerebello-rubro-thalamics (superior cerebellar peduncle after decussation)

Other:
Inferior colliculi
Tectum

Cerebral peduncle:
Tegmentum
Substantia nigra
Crus cerebri

Interpeduncular fossa
CN III fibers
Cerebral aqueduct
Periaqueductal gray

Blood vessels and areas supplied:
Basilar artery: Posterior cerebral & superior cerebellar:
a) Paramedian branches
b) Short circumferential branches
c) Long circumferential branches