If you placed a common object such as a key out of sight in the left hand of a typical commissurotomy patient, she:

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Commissurotomy patients, who have had the connections between the two hemispheres of their brain severed, typically show a split-brain phenomenon. When an object is placed in the left hand (which is controlled by the right hemisphere), they can recognize its shape due to the sensory and spatial processing capabilities of the right hemisphere. However, because language functions are primarily located in the left hemisphere and the hemispheres cannot communicate due to the commissurotomy, the patient cannot verbally identify the object.

If You Placed a Common Object Such as a Key