Final answer:
The absence of a corpus callosum means that information processed in one of the brain's hemispheres cannot be communicated to the other hemisphere. This condition is known as split-brain and is sometimes observed in savants.
Step-by-step explanation:
The absence of a corpus callosum means that information processed in one of the brain's hemispheres cannot be communicated to the other hemisphere. This condition, known as split-brain, is sometimes observed in savants. When the corpus callosum is cut, the left and right hemispheres are unable to share information, resulting in individuals with distinct functions in each hemisphere. In certain medical procedures to treat severe epilepsy, corpus callosum is cut to control the spread of seizures. This leads to a condition referred to as split-brain, which provides insights into the unique functions of the two brain's hemispheres. For instance, a split-brain patient may not be able to verbally identify an object presented to the left visual field because the information, which crosses into the right hemisphere, cannot be communicated to the language centers typically located in the left hemisphere. Yet, these same patients might be able to select the object with their left hand, which is controlled by the right hemisphere, although they cannot name it.