Question

continue using the nearpod to answer the following questions: 1. how is the fixation point involved in foveal vision? 2. in what order to the cells in the back wall of the eye activate? 3. information from your right field of vision in both eyes goes to the left hemisphere and information in the left field of vision in both eyes goes to the right hemisphere. what is the name of the nerve that transmits the visual information to the appropriate thalamus in the brain? 4. how is parallel processing involved in sight? does it make us faster or slower in our everyday lives? explain with an example related to vision! 5. what is blindsight? how the heck does that happen? 6. what did hubel and wiesel find and what do they do? (thank - you to these guys for creating the easiest cell name ever) 7. what are the five steps in visual processing according to the diagram on slide 24? 8. what interests you most about vision?

Explanation:

1. The fovea is the central part of the retina with high - acuity vision. The fixation point is what we focus on, and light from it falls on the fovea for detailed vision.
2. Light first activates photoreceptor cells (rods and cones) in the retina, then bipolar cells, and finally ganglion cells whose axons form the optic nerve.
3. The optic nerve transmits visual information. Information from the right visual field of both eyes goes to the left hemisphere and vice - versa via the optic chiasm before reaching the appropriate thalamus.
4. Parallel processing in sight involves the brain simultaneously processing different aspects like color, shape, and motion. For example, when seeing a red apple, we instantly perceive its color, round shape, and can judge its distance, which speeds up our ability to interact with the environment.
5. Blindsight is a phenomenon where people with certain brain damage claim to be blind in part of their visual field but can still respond to visual stimuli without conscious awareness. It occurs due to intact sub - cortical visual pathways that bypass the damaged visual cortex.
6. Hubel and Wiesel discovered feature - detecting cells in the visual cortex. These cells respond to specific features such as edges, lines, and angles, which are crucial for visual perception.
7. Without seeing the specific diagram on slide 24, general steps in visual processing can include: light absorption by photoreceptors, signal transduction in photoreceptors, synaptic transmission to bipolar and ganglion cells, transmission via the optic nerve to the brain, and processing in the visual cortex.
8. Answers will vary from person to person. Some may be interested in the complexity of how the brain processes visual information, others in visual illusions, or the role of vision in daily life.

Answer:

1. The fixation point's light falls on the fovea for detailed vision.
2. Photoreceptor cells (rods and cones), then bipolar cells, then ganglion cells.
3. The optic nerve.
4. The brain processes color, shape, and motion simultaneously; seeing a red apple is an example, which speeds up interaction.
5. It's when people seem blind but can respond to stimuli without awareness, due to intact sub - cortical pathways.
6. They found feature - detecting cells that respond to edges, lines, etc.
7. Light absorption by photoreceptors, signal transduction, synaptic transmission, nerve transmission, and cortical processing (general answer).
8. Varies per individual.