Psy 240 Wk 8

Topics: Lateralization of brain function, Human brain, Cognition Pages: 3 (484 words) Published: January 20, 2013
University of Phoenix Material
Appendix E

Hemispheres of the Brain
Our brain is divided into two main hemispheres, the left and the right. Each hemisphere is dominant in certain functions. Click either the left or the right hemisphere of the brain below and fill in the hemisphere’s appropriate functions.


Reference: Pinel, J. P. J. (2009). Biopsychology. Boston, MA: Pearson. Post a 200- to 300-word response to the following: Many studies have been conducted on cerebral lateralization revealing different functionalities of the left and right hemispheres. Describe four methods for studying cerebral lateralization.

The four methods for studying cerebral lateralization include the sodium amytal test, studying the effects of the brain lesions on both the left and right hemispheres, functional brain imaging, and the dichotic listening test.

The sodium amytal test involves injecting the sodium amytal into the carotid artery on either the left or right side of the neck which affects a corresponding hemisphere of the brain. The sodium amytal has an anesthetizing effect on the brain which allows researchers to study the language functionality of either or both hemispheres. The researchers will perform a series of tests on the patient while the brain is anesthetized. (Pinel, 2009)

Studying the effects of the brain lesions on both the left and right hemispheres is the earliest research done with cerebral lateralization. During this time, researchers were able to determine certain functionalities of the right and left hemispheres. Researchers thought the left hemisphere was dominant over the right side due to the studying of damaged left hemisphere and the amount of effect is had on different functions. (Pinel, 2009)

The least invasive procedure out of the four different methods is dichotic listening test where a patient will hear a number sequence at the same...
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