Final answer:
In split-brain patients, the loss of lateral peripheral vision in the left visual field causes the inability to verbally name objects displayed in that field. However, split-brain patients can still pick up and interact with those objects using their left hand, controlled by the right hemisphere.
Step-by-step explanation:
A unique clinical presentation of split-brain patients is the loss of lateral peripheral vision, known as bilateral hemianopia. This occurs because the surgery to treat severe epilepsy involves cutting the corpus callosum, which separates the two hemispheres of the brain. When an object is presented to the left visual field of a split-brain patient, they may be unable to verbally name the object due to the visual input crossing over to the right hemisphere, which cannot signal to the speech center in the left hemisphere. However, the patient may still be able to pick up and interact with the object using their left hand, controlled by the right hemisphere.