(2 points) Neuropsychologist Michael Gazzaniga (a student of Richard Sperry) per
ID: 3447113 • Letter: #
Question
(2 points) Neuropsychologist Michael Gazzaniga (a student of Richard Sperry) performed the following experiment3 on split-brain patients as shown in the figure below. 1. HE ART HE ART ART HE Two words separated by a dot are momentarily projected. "Look at the dot. Patients were first instructed to focus on a dot on the screen (left panel). For a very brief period of time (so that the patient could not move his eyes), the image HE ART was flashed on the screen. The patient was then asked two questions: a. What did you see? b. Point to the word you saw (from a list containing HE and ART) From what you now know about brain lateralization and the split brain, what would you predict the patient would answer to each question? Explain your answers. (3 points) Now consider the following experiment: You simultaneously and very quickly flash a red light in the left visual field of a split-brain patient and a green light in his right visual field. a. Would the two different colored lights be registered by the hemispheres? b. Would the split-brain patient be aware that the colors differ? c. What would the person verbally report seeing?Explanation / Answer
The patient would have seen words on the right side screen of the computer and when asked which word he saw, he would say "Art". Left brain is localized for language and right brain does not have this capability. Hence, he was able to tell the word present in the right side screen only. For him, left side of the screen would be empty. Also, for a split-brain patient the corpus callosum is cut, the two hemispheres would not communicate.
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