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optic stalk
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.〔Kaplan Qbook - USMLE Step 1 - 5th edition - page 55〕 The Bottom Line: the optic stalks are the structures that precede the optic nerves embryologically. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「optic stalk」の詳細全文を読む
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