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PNB 2XB3 - Central Vision Questions And Answers Rated A+ New Update Assured Satisfaction
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For an on-center ganglion cell, what causes it to maximally fire? - ️️light in the center and darkness in the surround superchiasmatic nucleus - ️️part of the hypothalamus, which regulates circadian rhythms - some axons from the retina go here explain the retinotopic/visuotopic map of t...

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  • September 17, 2024
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  • 2024/2025
  • Exam (elaborations)
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PNB 2XB3 - Central Vision
For an on-center ganglion cell, what causes it to maximally fire? - ✔️✔️light in the
center and darkness in the surround

superchiasmatic nucleus - ✔️✔️part of the hypothalamus, which regulates circadian
rhythms - some axons from the retina go here

explain the retinotopic/visuotopic map of the primary visual cortex - ✔️✔️the macula
takes up a disproportionally large space in the cortex, compared to the peripheral field

What is the spontaneous level of activity or baseline for a ganglion cell? - ✔️✔️when
the entire field is in the dark

color opponency - ✔️✔️the center and surround cones can be of different types
(red,green,blue...)

fixating the eyes on an object - ✔️✔️turning the eyes so that the image falls on the
fovea of each eye

monocular vision portion of the visual field - ✔️✔️areas that only one eye can see

binocular visual field - ✔️✔️a region of the visual field seen by both eyes

a view in the left VISUAL FIELD is sent to which side of the occipital lobe? - ✔️✔️the
right side

macula - ✔️✔️center of vision

consists of the axons from both the nasal and temporal retina of one eye - ✔️✔️optic
nerve

the nasal pathways decussate through the - ✔️✔️optic chiasm

what axons are in each optic tract? - ✔️✔️temporal retina axons of the ipsilateral eye,
and the nasal retina axons of the contralateral eye

contralaterality in the visual system can be seen starting in the - ✔️✔️optic tract

pretectum - ✔️✔️area in the brainstem to control pupil dilation (unconscious) - some
axons from the retina go here

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