Lectures

Primary Visual Cortex

by Craig Canby, PhD
(1)

Questions about the lecture
My Notes
  • Required.
Save Cancel
    Learning Material 2
    • PDF
      Slides 15 VisualPathway BrainAndNervousSystem.pdf
    • PDF
      Download Lecture Overview
    Report mistake
    Transcript
    Now, we have come upon the visual pathway itself. The primary visual cortex is in the occipital lobe of the cerebrum. So to visualize, to perceive vision, light has to go through a fairly complicated visual pathway to get to this primary visual cortex. Let’s take that particular journey. The first thing to kind of consider here is that we have two visual fields. We have a left visual field over here. We have a right visual field over here. Another consideration is the arrangement of the retinae in this pathway. We are going to define the retinae as having a temporal component as well as a retinal component. So if we look in the left eyeball of the left retina, this more medial aspect is close to the nose. So this is the nasal retina of the left eye and then this will be the temporal retina of the left eye. Over here, we have the nasal retina of the right eye. We have the temporal retina of the right eye. The temporal retina, when the photoreceptors there are activated, optic nerve fibers are going to travel ipsilaterally into the optic tract. So let’s take a look at how those fibers are travelling. Temporal retina here in the left eye and then when this retina is activated, we see the optic nerve. We see the optic chiasm. Then these fibers from the temporal retina will stay ipsilaterally to then travel to the left primary visual cortex. Same thing with the right eye except the temporal retina here is in red. The red fibers travel here in the optic nerve, get into the optic chiasm, do not cross and then continue their journey ipsilaterally to the primary visual cortex. This is in contrast to the path that nerve fibers take...

    About the Lecture

    The lecture Primary Visual Cortex by Craig Canby, PhD is from the course Visual Pathways.


    Included Quiz Questions

    1. Fibers from Temporal retina travel ipsilateral while from Nasal retina travel contralateral into optic tract.
    2. Fibers from both Temporal and Nasal retina travel ipsilateral into optic tract.
    3. Fibers from right temporal retina travel ipsilateral while from left temporal retina travel contralateral into optical tract.
    4. Fibers from Temporal retina travel contralateral while from Nasal retina travel ipsilateral into optic tract.
    5. Fibers from both Temporal and Nasal retina travel contralateral into optic tract.
    1. Lateral Geniculate Nucleus
    2. Pretactal area
    3. Superior Colliculi
    4. Edinger-Westphal nucleus
    5. Suprachiasmatic nucleus

    Author of lecture Primary Visual Cortex

     Craig Canby, PhD

    Craig Canby, PhD


    Customer reviews

    (1)
    5,0 of 5 stars
    5 Stars
    5
    4 Stars
    0
    3 Stars
    0
    2 Stars
    0
    1  Star
    0