Embryology Mnemonic

Question 1

Derivation of ocular tissue - neuroectoderm

Answer 1

Use the mnemonic (If PROVEN) CLEVER, SEE TV
i. Neuroectoderm: 
Iris sphincter/dilator, 
Pigmented iris epi, 
RPE, 
Optic nerve, axons and glia, 
Vitreous, 
Epithelium of ciliary body, 
Neurosensory retina

Question 2

Derivation of ocular tissue - surface ectoderm

Answer 2

Use the mnemonic If PROVEN (CLEVER), SEE TV
ii. Surface Ectoderm:
Conj & K epithelium,
Lens,
Epithelium, glands, cilia of skin and caruncle,
Vitreous,
Eyelid skin, glands and cilia,
Route for tear production and drainage (lacrimal gland and canalicular system)

Question 3

Derivation of ocular tissue – mesoderm

Answer 3

Use the mnemonic If PROVEN CLEVER, (SEE TV)
iii. Mesoderm: 
Schlemm’s canal, 
Endothelium of all vessels, 
Extraocular muscle fibers, 
Temporal sclera, 
Vitreous

Question 4

Derivation of ocular tissue - neural crest

Answer 4

iv. Neural Crest: Everything else (lots of Cs)

Corneal stroma
Corneal endothelium

Trabecular meshwork

Iris connective tissue
Ciliary muscles and ganglion

ON meningeal sheaths,
Choroid
Melanocytes

Sclera (temporal portion = mesoderm)
EOM sheaths and tendons

Orbital bones (all midline and inferior & parts of orbital roof and lateral rim)
orbital connective tissue
Cartilage

Schwann cells
muscular layer and sheaths of blood vessels

Question 5

hyaloid artery is a branch of which artery in the developing eye?

Answer 5

HYAlOID ARTERY: 
HY 
A:artery L, 
O:ophthalmic, 
I: think I looks like a number 1 which means first primitive
D: dorsal

primitive dorsal ophthalmic artery

Question 6

What is the “Fibrillenstruktur neuromuscular junction” and for what type of movement are they responsible?

Answer 6

Fibrillenstruktur muscles use en plaque neuromuscular junctions and are responsible for saccadic movements.

Felderstruktur muscles use en grappe neuromuscular junctions and are responsible for smooth pursuit movements.

Felder grapples with smooth movement (smooth wine/grapes)