Cerebrospinal fibers

Cerebrospinal fibers
Coronal section through mid-brain. 1. Corpora quadrigemina. 2. Cerebral aqueduct. 3. Central gray stratum. 4. Interpeduncular space. 5. Sulcus lateralis. 6. Substantia nigra. 7. Red nucleus of tegmentum. 8. Oculomotor nerve, with 8’, its nucleus of origin. a. Lemniscus (in blue) with a’ the medial lemniscus and a" the lateral lemniscus. b. Medial longitudinal fasciculus. c. Raphé. d. Temporopontine fibers. e. Portion of medial lemniscus, which runs to the lentiform nucleus and insula. f. Cerebrospinal fibers. g. Frontopontine fibers.
Details
Latin	Fibrae cerebrospinales
*Anatomical terms of neuroanatomy* [edit on Wikidata]

The cerebrospinal fibers, derived from the cells of the motor area of the cerebral cortex, occupy the middle three-fifths of the base; they are continued partly to the nuclei of the motor cranial nerves, but mainly into the pyramids of the medulla oblongata.

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

Anatomy of the midbrain

Tectum
(Dorsal)

Surface	Corpora quadrigemina: Inferior colliculus Brachium Superior colliculus Brachium

Grey matter	Pretectal area

White: Sensory/ascending	Spinotectal tract Central tegmental tract

White: Motor/descending	Tectospinal tract

Peduncle
(Ventral)

White: Sensory/ascending

White: Motor/descending

Grey: other

Periaqueductal gray Raphe nuclei dorsal

Ventral tegmental area Pedunculopontine nucleus Red nucleus

Rostral interstitial nucleus of medial longitudinal fasciculus

Base

White: Motor/descending	Cerebral crus: Corticospinal tract Corticobulbar tract Corticopontine tract/Frontopontine fibers/Temporopontine fibers

Grey: Substantia nigra	Pars compacta Pars reticulata

Surface	Superior cerebellar peduncle Decussation Interpeduncular fossa

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