Optic stalk

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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.)
Latin	pedunculus opticus
Gray's	p.1001
Carnegie stage	14
Code	TE E5.14.3.4.2.2.6

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

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

External links

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

This article incorporates text from a public domain edition of Gray's Anatomy.

Prenatal development/Mammalian development of nervous system (GA 9.733 and GA 10.1002, TE E5.13-16)

Neurogenesis

General neural development/ neurulation/neurula	Notochord Neuroectoderm Neural plate Neural fold Neural groove Neuropoiesis

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

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

Eye development

Surface ectoderm: Lens placode

Auditory development

Otic placode
- Otic pit
- Otic vesicle

note: NS is mostly ectoderm, but mesoderm is precursor for epineurium, perineurium, and endoneurium

M: CNS

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

M: EYE

anat (g/a/p)/phys/devp/prot

noco/cong/tumr, epon

proc, drug (S1A/1E/1F/1L)

M: EAR

anat (e/p)/phys/devp

noco/cong, epon

proc, drug (S2)

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