12
Cross-sections of the midbrain
19.4
Aqueduct of midbrain Trochlear nerve
Posterior longitudinal fasciculus Mesencephalic tract of trigeminal nerve
Central grey substance
Nuclei of inferior colliculus
Brachium of colliculus inferior
Mesencephalic nucleus of trigeminal nerve
Lateral lemniscus Central tegmental tract
Nucleus of trochlear nerve
Medial longitudinal fasciculus Spinal lemniscus
Decussation of superior cerebellar peduncles
Medial lemniscus Occipitopontine, parietopontine, temporopontine and corticoreticular fibres
Substantia nigra – compact part Substantia nigra – reticular part
Corticonuclear fibres
Corticospinal tract Corticonuclear fibres Frontopontine fibres Rubrospinal tract
Caudal section
Interpeduncular nucleus
Tectospinal tract Accessory nuclei of oculomotor nerve Posterior longitudinal fasciculus
Aqueduct of midbrain Pretectal nuclei
Central grey substance Nucleus of oculomotor nerve
Medial longitudinal fasciculus
Superior colliculus Interstitial nucleus
Central tegmental tract
Reticular formation
Brachium of colliculus inferior
Red nucleus
Spinal lemniscus Medial lemniscus Occipitopontine, parietopontine, temporopontine and corticoreticular fibres Corticonuclear fibres
Corticospinal tract
Substantia nigra – compact part
Rostral section Corticonuclear fibres
Frontopontine fibres
Substantia nigra – reticular part Oculomotor nerve
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