psyc2lecture2

psyc2lecture2 - 9/29/2010 CHAPTER 1 (CONTINUED) Origins of...

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9/29/2010 1 CHAPTER 1 (CONTINUED) Origins of Behavioral Neuroscience 1 THE NATURE OF BEHAVIORAL NEUROSCIENCE VITAL CLARIFICATION ABOUT BOOK-LECTURE DISCREPANCY!!! Doctrine of specific nerve energies Müller’s conclusion that because all nerve fibers carry the same type of message, sensory information must be specified by the particular nerve fibers that are active specified by the particular nerve fibers that are active. TAKE-HOME MESSAGE: If the theory says that the nerves change/alter/transform or otherwise mess with the signal they transmit , it is WRONG. If it says that the nerves are passive conductors that only connect the message to a part of the brain that interprets it, it’s correct. 2 THE NATURE OF BEHAVIORAL NEUROSCIENCE Biological Roots of Behavioral Neuroscience Flourens removed various parts of animals’ brains and observed their behavior. By seeing what the animal could no longer do, he could infer the function of the missing portion of the brain. Experimental ablation The research method in which the function of a part of the brain is inferred by observing the behaviors an animal can no longer perform after that part of the brain is damaged. 3
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9/29/2010 2 THE NATURE OF BEHAVIORAL NEUROSCIENCE Biological Roots of Behavioral Neuroscience Soon after Flourens performed his experiments, Paul Broca, a French surgeon, applied the principle of experimental ablation to the human brain. Of course, he did not intentionally remove parts of human brains to see how they worked parts of human brains to see how they worked. Instead, he observed the behavior of people whose brains had been damaged by strokes. In 1861, he performed an autopsy on the brain of a man who had had a stroke that resulted in the loss of the ability to speak. 4
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psyc2lecture2 - 9/29/2010 CHAPTER 1 (CONTINUED) Origins of...

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