Optic stalk

Optic stalk
Transverse section of head of chick embryo of fifty-two hours’ incubation.
Optic cup and choroidal fissure seen from below, from a human embryo of about four weeks. (Optic stalk labeled at center left.)
Details
Carnegie stage	14
Identifiers
Latin	pedunculus opticus
Code	TE E5.14.3.4.2.2.6
*Anatomical terminology* [edit on Wikidata]

The optic vesicles project toward the sides of the head, and the peripheral part of each expands to form a hollow bulb, while the proximal part remains narrow and constitutes the optic stalk.

Closure of the choroid fissure in the optic stalk occurs during the seventh week of development. The former optic stalk is then called the optic nerve.^[1] The Bottom Line: the optic stalks are the structures that precede the optic nerves embryologically.

References

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

↑ Kaplan Qbook - USMLE Step 1 - 5th edition - page 55

External links

eye-012—Embryo Images at University of North Carolina
Overview at vision.ca

Development of the nervous system

Neurogenesis

General	Neural development Neurulation Neurula Notochord Neuroectoderm Neural plate Neural fold Neural groove Neuropoiesis Adult neurogenesis

Neural crest	Cranial neural crest Cardiac neural crest complex Truncal neural crest

Neural tube	Rostral neuropore Neuromere / Rhombomere Cephalic flexure Pontine flexure Alar plate Basal plate Glioblast Neuroblast Germinal matrix

Eye

Ear

Otic placode
- Otic pit
- Otic vesicle

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