Natalie J.'s grandfather became blind after a stroke. His ability to touch the end of a cane held by his doctor
A) was made possible because his color visual system was intact.
B) was possible because his corpus callosum was intact.
C) was made possible because his primitive visual system was intact.
D) was due to chance.
E) occurred because the stroke did not involve the right hemisphere.

Question

Quizplus · Accepted Answer

The ability to touch the end of a cane held out by the doctor despite being blind is an example of the intact primitive visual system, which allows a blind person to perceive objects through touch and other senses. It is not related to color vision or the corpus callosum, and there is no mention of the location of the stroke. Therefore, the best answer is C.

Natalie J'S Grandfather Became Blind After a Stroke