Anatomy of Visual Pathways — Flashcards

Flashcard 1: Lesion to areas after the optic chiasm result in _____-ocular and homonymous contra-lateral deficits in vision

Answer: bin

Flashcard 2: K1, K4, and K6 receive _____lateral retinal inputs

Answer: contra

Flashcard 3: Which **magnocellular** layer of the lateral geniculate nucleus (LGN) receives **ipsilateral** retinal input?

Answer: Layer 2

Extra: The Lateral Geniculate Nucleus (LGN) consists of 6 layers: - **Magnocellular (M) layers**: 1 and 2 - **Parvocellular (P) layers**: 3, 4, 5, and 6 Input distribution: - **Ipsilateral (I) input**: Layers 2, 3, and 5 - **Contralateral (C) input**: Layers 1, 4, and 6 Therefore, **Layer 2** is the only magnocellular layer that receives ipsilateral retinal input. (Layer 1 receives contralateral magnocellular input).

Flashcard 4: K3 and K5 receive _____lateral retinal inputs

Answer: ipsi

Flashcard 5: Visual loss is _____ marked in AAION

Answer: more

Flashcard 6: Pituitary adenoma may present with _____ due to compression of the optic chiasm

Answer: bitemporal hemianopsia

Flashcard 7: The length of the intra-_____ part of the optic nerve is 1mm

Answer: ocular

Flashcard 8: _____ is a condition of abnormal myelination of the nerve fibers of the retina, where myelination continues beyond lamina cribrosa and spreads into the retina beyond the optic disc.

Answer: Medullated nerve fibers (optic disc medullation)

Flashcard 9: _____ sign is seen in optic nerve hypoplasia

Answer: Double-ring

Flashcard 10: Hyperemic optic disc with telangiectatic (non-leaky on FFA) capillaries is suggestive of _____.

Answer: LHON