Question 1

The largest cell bodies in the lateral geniculate nucleus are found in the layers.

Accepted Answer

The magnocellular layers contain the largest cell bodies in the lateral geniculate nucleus.

Question 2

Achromatopsia

Accepted Answer

The answer of Achromatopsia
...

Question 3

The is the place in the visual pathway where the optic nerve from each eye splits and sends half of its fibers to each hemisphere

Accepted Answer

The optic chiasm is where the optic nerve from each eye splits and sends half of its fibers to each hemisphere. The optic tract is the continuation of the optic nerve fibers after they leave the chiasm, and the blind spot is a small area in the retina where there are no photoreceptor cells and where the optic nerve leaves the eye.

Question 4

Explain the following statement: "Contralaterality of vision is based on the field of vision and not on the eye of signal origin."

Accepted Answer

The answer of Explain the following statement: "Contralaterality of vision...

Question 5

Research investigating the functions of the anterior intraparietal area (AIP)have found that the AIP is involved in only

Accepted Answer

Research has shown that the AIP is specifically involved in the planning and control of grasping movements, and not necessarily reaching or touching.

Question 6

Single-cell recordings from neurons in the medial temporal area show that those cells tend to respond best to

Accepted Answer

Neurons in the medial temporal area (MT) are known to be highly responsive to motion, making them specialized for detecting movement.

Question 7

You are having dinner when you notice something flying around the table.You realize it's a fly,but you keep on eating.Finally,it lands.You track its movement for a few seconds,then reach out and swat it flat.Describe the primary functional modules and visual pathways that are involved at each point in this chain of events.

Accepted Answer

The answer of You are having dinner when you notice...

Question 8

The response rate of a(n)cell increases as the length of an edge increases up to a point,but then decreases as the length of the edge increases further.

Accepted Answer

This pattern is known as end-stop cells, where the response rate increases as the length of an edge increases up to a certain point, after which it decreases. This is a characteristic of cells in the visual cortex that respond to the termination of edges, hence the term "end-stop". The other options, simple and complex cells, refer to different types of cells in the visual cortex but do not match the described pattern of response.

Question 9

An electrode is inserted obliquely into area V1.Describe the changes in the characteristics of the neurons successively encountered as the electrode penetrates deeper into V1.A second elec- trode is inserted perpendicularly into area V1.What are the characteristics of the successively encountered neurons as the second electrode penetrates deeper into V1?

Accepted Answer

The answer of An electrode is inserted obliquely into area...

Question 10

First,explain the concept of cortical magnification in terms of the receptive fields of RGCs.Next,discuss the concept of cortical magnification from the point of view of your everyday visual experience.That is,how does your ability to see across the visual field square with the notion of cortical magnification?

Accepted Answer

The answer of First,explain the concept of cortical magnification in...

Question 11

Describe the double dissociative pattern of impairment and ability shown by Milner and Goo- dale's patient,D.F. ,and patients suffering from optic ataxia.(What are the abilities and impair- ments of each?)What conclusions about the visual processing streams can be drawn from this double dissociation?

Accepted Answer

The answer of Describe the double dissociative pattern of impairment...

Question 12

The fusiform face area (FFA)

Accepted Answer

The fusiform face area (FFA) is located in the temporal cortex, specifically in the fusiform gyrus, which is part of the ventral stream of visual processing. It is strongly activated when viewing faces, suggesting its specialized role in face perception.

Question 13

The lateral geniculate nucleus is composed of layers.

Accepted Answer

The lateral geniculate nucleus is composed of 6 layers. These layers receive input from the ipsilateral and contralateral eyes and project to the primary visual cortex.

Question 14

The visual field is represented on the left cerebral cortex.

Accepted Answer

The visual field is represented on the opposite side of the cerebral cortex, meaning the right visual field is represented on the left cerebral cortex and vice versa. Therefore, the correct choice is B (right).

Question 15

Static visual properties are associated with the layers.

Accepted Answer

Parvocellular cells are responsible for processing static visual properties like color and shape, which are associated with the layers of the retina. Magnocellular cells are responsible for motion detection and Koniocellular cells are involved in color processing but not specifically related to static visual properties associated with layers.

Question 16

Briefly describe the studies performed by Schiller and Logothetis (1990)and Ungerlieder and Mishkin (1982).What was similar about their methods? Describe the findings of each and ex- plain the reasoning they used to draw their final conclusions.

Accepted Answer

The answer of Briefly describe the studies performed by Schiller...

Question 17

What structures along the visual stream exhibit retinotopic mapping? At what point in visual processing is retinotopic mapping no longer the rule? Why do we not expect to find retinotopic mapping in an area such as the FFA (fusiform face area)?

Accepted Answer

The answer of What structures along the visual stream exhibit...

Question 18

According to the idea of ,the area in the primary visual cortex devoted to a stimulus at the fovea is greater than the area devoted to the same stimulus in the periphery of the retina.

Accepted Answer

Cortical magnification refers to the phenomenon where the representation of the fovea in the visual cortex is disproportionately large compared to the representation of the periphery. This means that smaller details at the fovea are processed by a larger number of neurons in the visual cortex, compared to larger and less detailed stimuli in the periphery.

Question 19

A electrode path would encounter cells tuned to the full range of preferred orien- tations.

Accepted Answer

An electrode path that encounters cells tuned to the full range of preferred orientations would likely be oblique, as this would allow for the electrode to sample different areas of the visual field and encounter a variety of orientation-tuned neurons. Perpendicular or contralateral electrode paths would not necessarily sample such a wide variety of orientation-tuned neurons.

Question 20

D.F. ,a woman who had suffered damage to her ventral pathway due to carbon monoxide poi- soning,was studied by Goodale et al.(1991)using the perceptual matching and posting tasks.The results showed that D.F.

Accepted Answer

The study found that D.F. was able to perform the posting task well, indicating intact dorsal pathway functioning. However, she was unable to perform the perceptual matching task, suggesting damage to the ventral pathway. Therefore, option C is the best choice.

Quiz 3: The Visual Brain