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. The Bottom Line: the optic stalks are the structures that precede the optic nerves embryologically.
Famous quotes containing the word stalk:
“List Lady be not coy, and be not cosen’d
With that same vaunted name Virginity,
Beauty is natures coyn, must not be hoorded,
But must be current, and the good thereof
Consists in mutual and partak’n bliss,
Unsavoury in th’injoyment of it self
If you let slip time, like a neglected rose
It withers on the stalk with languish’t head.”
—John Milton (1608–1674)