Split-Brain Function

Summary This study looks at each hemisphere of the brain and how it functions. Through split-brain research, developed by Michael Gazzaniga and Roger Sperry, numerous fascinating discoveries have been made. Many scientists, including Gazzaniga and Sperry, have conducted a wide variety of tests on split-brain and non-split-brain patients that revealed functions commonly associated with either the left or right hemisphere of the brain. Research has found that the left hemisphere of the brain controls the right side of the body; as well as speaking, writing, calculating, reading, and other language comprehension skills. Conversely, the right hemisphere of the brain controls the left side of the body; as well as facial recognition, spacial relationship, and artistic activities (Gazzaniga, 1967, p.8). Such information still causes researchers to debate the performance of the brain when split and to question how separate the two halves of the brain actually are.

Method

The first of these: a visual test; the second, a physical test and the third, an auditory test. The visual test used flashing lights to determine the visual response capabilities on each side of the brain. The physical test involved handing an item to a patient without allowing them to see it and asking them to identify and describe it. This experiment uncovered each hemisphere’s capacity for movement. In the auditory test, patients tasked with using either their left or right hand had to grab a described item from a bag. This test aided in determining each hemisphere’s ability to process spoken language. All three tests were invaluable in uncovering the way the brain