Optic stalk | |
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![]() 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 |
TE | stalk_by_E5.14.3.4.2.2.6 E5.14.3.4.2.2.6 |
Anatomical terminology |
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.[1][2]
Closure of the choroidal fissure in the optic stalk occurs during the seventh week of development. The former optic stalk is then called the optic nerve.[3] In short, the optic stalks are the structures that precede the optic nerves embryologically.