PET scans have demonstrated that when you are creating a visual image, ________.
A) the image is generated by the retinal ganglion cells and sent to the cortex
B) the image is generated by the thalamus and sent to the brain
C) the areas associated with stored knowledge send information to the visual cortex
D) there is no locus in the brain that can be determined for the generation of visual images

Question

PET scans have demonstrated that when you are creating a visual image, ________.
A) the image is generated by the retinal ganglion cells and sent to the cortex
B) the image is generated by the thalamus and sent to the brain
C) the areas associated with stored knowledge send information to the visual cortex 
D) there is no locus in the brain that can be determined for the generation of visual images

Quizplus · Accepted Answer

PET scans have demonstrated that when creating a visual image, the areas associated with stored knowledge send information to the visual cortex. This process is known as top-down processing, where higher-level cognitive processes influence lower-level sensory processing. The image is not generated by the retina or thalamus alone, but rather a combination of both bottom-up sensory input and top-down influences from stored knowledge and expectations. Therefore, option C is the best choice.

PET Scans Have Demonstrated That When You Are Creating a Visual