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RHSC420 FINAL Questions & 100% Correct Answers- Latest Test | Graded A+ | Passed $12.49   Add to cart

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RHSC420 FINAL Questions & 100% Correct Answers- Latest Test | Graded A+ | Passed

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  • RHSC 420
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  • RHSC 420

How do images in our visual field that project to the retina look like? -:- REVERSED and INVERTED Describe the optic pathway -:- 1) Retinal fibers take info from contralateral visual field -Nasal retinal and temporal retinal fibers 2) Optic Nerve -Ipsilateral afferent info down optic nerve ...

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  • September 6, 2024
  • 20
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • RHSC 420
  • RHSC 420
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2024 /2025 | © copyright | This work may not be copied for profit gain | Excel!



RHSC420 FINAL Questions & 100% Correct
Answers- Latest Test | Graded A+ | Passed
How do images in our visual field that project to the retina look like?


✓ -:- REVERSED and INVERTED




Describe the optic pathway


✓ -:- 1) Retinal fibers take info from contralateral visual field

-Nasal retinal and temporal retinal fibers




2) Optic Nerve


-Ipsilateral afferent info down optic nerve




3) Optic Chiasm


-Nasal retinal fibers cross, temporal retinal stay




4) Optic tract


-Contain afferents from contralateral visual field




1|Page | Grade A+| 2024/2025

,2024 /2025 | © copyright | This work may not be copied for profit gain | Excel!

5) Optic radiations


-Project from Lateral Geniculate Nucleus (LGN) to primary visual cortex




How do optic radiation projection differ based on visual field?


✓ -:- Upper: Afferent from lower retina, loop around the inferior horn of lateral

ventricle (Meyer's loop), synapse below calcarine sulcus




Middle: Afferents from fovea project through parietal lobe and synapse above/below

calcarine sulcus




Lower: Afferent from upper retina project into parietal lobe and synapse above calcarine

sulcus




How is the visual field represented in the primary visual cortex?


✓ -:- Middle visual field is represented more anteriorly, peripheral visual field

represented more posteriorly




What does rods/cones specialize in?


✓ -:- Rods: Dim light, high sensitivity to light

Cones: Visual acuity in bright light/colour vision

2|Page | Grade A+| 2024/2025

, 2024 /2025 | © copyright | This work may not be copied for profit gain | Excel!




-Only cones in the fovea, periphery has more rods




Blood supply in the eye and visual cortex


✓ -:- Retina has dual blood supply - ciliary/retinal vessels

-Ciliary: supplies optic disc, choroid/sclera, outer retina


-Central retinal artery (CRA): supplies inner retina


-Central retinal vein (CRV): drains into ophthalmic vein -> cavernous sinus




Visual cortex = PCA




How is visual info processed?


✓ -:- Primary visual cortex integrates the info and projects it to association areas

through dorsal/ventral streams




Ventral - Where/how -> Parietal lobe (attention/awareness)


Dorsal - What -> Temporal lobe (recognition)




What are the innervations for the extraocular mm?

3|Page | Grade A+| 2024/2025

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