Researchers conducted tests on a patient suffering from damage to the corpus callosum by presenting images of objects in one part of the visual field. In which situation is the patient most likely to confabulate when asked to explain a given response to visual stimulation?
A) When the object is presented in the right part of the visual field and the patient is instructed to imagine it moving
B) When the object is presented in the right part of the visual field and the patient is instructed to point to it
C) When the object is presented in the left part of the visual field and the patient is instructed to draw the object
D) When the object is presented in the left part of the visual field, and the patient is instructed to describe it

Question

Quizplus · Accepted Answer

When an object is presented in the left part of the visual field, it is processed by the right hemisphere of the brain. In a person with damage to the corpus callosum, this information cannot be transferred to the left hemisphere, which is responsible for language production. Therefore, when asked to describe the object, the patient is more likely to confabulate, or make up a response, because they do not have access to the information. This phenomenon is known as "left-hemisphere interpreter" and is common in patients with corpus callosum damage.

Researchers Conducted Tests on a Patient Suffering from Damage to the Corpus