Question

visual fields and visual pathways to the brain
axons carrying impulses from the retina are bundled together at the posterior aspect of the (1.) and leave the back of the eye as the optic nerve. at the optic chiasma (ki-asmah; chiasm = cross) the fibers from the medial side of each eye cross over to the opposite side of the brain. the fiber tracts that result are the optic tracts. each optic tract contains fibers from the lateral side of the eye on the same side and the medial side of the opposite eye. the optic tract fibers synapse with (2.) in the thalamus, whose axons form the optic radiation, which runs to the occipital lobe of the brain. there they synapse with the cortical cells, and visual interpretation, or seeing, occurs. (figure 8.10 shows the visual pathway from the eye to the brain)
each side of the brain receives visual input from both eyes—from the lateral field of the eye on its own side and from the medial field of the other eye. also notice that each eye \sees\ a slightly different view but that their visual fields (3.) quite a bit. as a result of these two phenomena, humans have binocular vision. binocular vision, literally \two-eyed vision,\ provides for depth perception, also called \three-dimensional\ vision, as our visual cortex fuses the two slightly different images delivered by the two eyes into one \picture.\
homeostatic imbalance 8.7
hemianopia (hem\e-ah-nope-ah) is the loss of the same side of the (4.) field of both eyes, which results from damage to the visual cortex on one side only (as occurs in some strokes) thus, the person would not be able to see things past the middle of the visual field on either the right or left side, depending on the site of the stroke. such individuals should be carefully attended and warned of objects in the nonfunctional side of the visual field their food and personal objects should always be placed on their (5.) side, or they might miss them
○ 1. visual 2. functional 3. eyeball 4. neurons 5. overlap
○ 1. eyeball 2 neurons 3. overlap 4. visual 5. functional
○ 1. functional 2. eyeball 3 neurons 4 overlap 5. visual
○ 1 neurons 2 overlap 3 visual 4. functional 5 eyeball
○ 1. overlap 2 visual 3 functional 4 eyeball 5 neurons

Explanation:

• For blank 1: Axons from the retina bundle at the posterior of the eyeball.
• For blank 2: Optic tract fibers synapse with neurons in the thalamus.
• For blank 3: Visual fields of the two eyes overlap.
• For blank 4: Hemianopia is loss of the same side of the visual field.
• For blank 5: Objects should be placed on the functional side.

Answer:

1. eyeball 2. neurons 3. overlap 4. visual 5. functional