NERVOUS SYSTEM AND SPECIAL SENSES

Adult Fate:

• Cerebral cortex

• Rhinencephalon

Origin:

Telencephalon

Adult Fate:

Ventricles 1 and 2 (lateral ventricles)

Origin:

Lateral telocoele

Adult Fate:

Foramina of Monroe

Origin:

Openings of lateral telocoeles

Adult Fate:

Thalamus

Origin:

Diencephalon

Adult Fate:

Corpora quadrigemina

Origin:

Mesencephalon

Adult Fate:

Cerebral aqueduct (Aqueduct of sylvius)

Origin:

Mesocoele

Adult Fate:

• Cerebellum

• Pons

Origin:

Metencephalon

Adult Fate:

Ventricle 4

Origin:

Metocoele

Adult Fate:

Medulla oblongata

Origin:

Myelencephalon

Adult Fate:

Ventricle 4

Origin:

Myelocoele

Adult Fate:

Spinal canal

Origin:

Neural canal

Adult Fate:

Ependymal lining

Origin:

Germinal layer of wall

Adult Fate:

Gray matter (cortex)

Origin:

Mantle layer of wall

Adult Fate:

White matter (medulla)

Origin:

Mantle layer of wall

Adult Fate:

• Retina

• Optic nerve

• Iris

• Ciliary apparatus

Origin:

Optic cup

Adult Fate:

Lens

Origin:

Lens placode

Adult Fate:

Cornea

Origin:

Surface ectoderm

Adult Fate:

• Choroid

• Sclera

• Stroma of cornea

Origin:

Ectomesenchyme

Adult Fate:

Optic nerve

Origin:

Optic stalk

Adult Fate:

• Cochlea

• Vestibular apparatus

Origin:

Otic placode

Adult Fate:

• Incus

• Malleus

Origin:

Pharyngeal arch 1

Adult Fate:

• Tympanic cavity

• Auditory tube

• Guttural pouch

Origin:

Pharyngeal pouch 1

Adult Fate:

Stapes

Origin:

Pharyngeal arch 2

Adult Fate:

Pharyngeal arch 2

Origin:

Apposition of endoderm and ectoderm at pharyngeal cleft

Adult Fate:

External auditory meatus

Origin:

Pharyngeal cleft