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Visual System and Lesions

Quiz by OASIS

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45 questions
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  • Q1
    Pupillary constriction is under sympathetic control, while pupillary dilation is under parasympathetic control.
  • Q2
    Pupillary constriction is accomplished through which cranial nerve?
    CN III
    CN V
    CN VI
    CN IV
  • Q3
    Brittany is blind in her right eye due to a lesion in her right optic nerve. As a result, when a light is shined into her left eye, what happens to her pupillary reaction?
    Only her left eye will dilate
    Both eyes will dilate
    Both eyes will constrict
    Only her left eye will constrict
  • Q4
    Aaron has normal vision. Shining a light in Aaron’s left eye will produce pupil constriction in:
    His left eye
    Both eyes
    Neither eye – it dilates his pupils
    His right eye
  • Q5
    Briana went to the hospital because she presented with visual loss in both eyes. More specifically, she suffered from vision loss to the left visual field of her left eye, and the right visual field of her right eye, also known as bitemporal hemianopia. Briana likely has a lesion to what part of her visual pathway?
    Left optic nerve
    Right optic radiation
    Optic chiasm
    Right optic tract
  • Q6
    A lesion that includes the ____________________________ will produce contralateral hemianopia with macular sparing. The macular sparing may be due to some collateral circulation from the middle cerebral arteries.
    Primary visual cortex
    Lateral optic nerve
    Optic tract
    Optic chiasm
  • Q7
    Lesions at or beyond the optic chiasm usually results in vision loss to one eye.
  • Q8
    Layers 1 and 2 of the lateral geniculate nucleus (LGN) are comprised of ____________________ cells, while layers 3-6 are comprised of _______________________ cells.
    Parvocellular, magnocellular
    Magnocellular, parvocellular
    Koniocellular, magnocellular
    Koniocellular, parvocellular
  • Q9
    The retinotopic surface of the visual cortex represents the _________________ posteriorly and the ____________________________ more anteriorly.
    Macula, surrounding retina
    Fovea, surrounding macula
    Surrounding retina, macula
    Surrounding retina, fovea
  • Q10
    From the optic chiasm, the axons of the visual pathway travel directly to the________________, where the entire left or right visual field from both eyes is put together.
    Primary visual cortex in the occipital lobe
    Lateral geniculate nucleus
    Medial geniculate nucleus
    Optic disc
  • Q11
    The overlap in the visual field from each eye creates binocular vision, which is notably responsible for:
    Peripheral vision
    Depth perception
    Distant vision
    Double vision
  • Q12
    The right half of the visual field in each eye gets routed to the _________________________, and the left half of the visual field from each eye gets routed to the ___________________________.
    Inferior hemisphere, superior hemisphere
    Left hemisphere, right hemisphere
    Right hemisphere, left hemisphere
    Superior hemisphere, inferior hemisphere
  • Q13
    Jennifer arrives at the ER after having a car accident and is experiencing head trauma. She presents with a headache and vomiting. The doctors are concerned about increased pressure causing blockage of flow from the retinal veins leading to swelling of the optic nerve head. This is also known as:
  • Q14
    The point at which retinal ganglion cell axons leave the eye and retinal blood vessels enter is called:
    Optic disc
    Capsule of Tenon
    Macula lutea
  • Q15
    The _______________ is an area surrounding the fovea that has a yellowish appearance due to presences of yellow pigment.
    Retinal surface vessels
    Capsule of Tenon
    Lamina cribrosa

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