Understanding how the brain works has been a complex phenomenon in the field of biopsychology that has produced mountains of research, speculation, and divergent opinions among researchers. It is evident that our brain is made up of two hemispheres, the right and the left (in Gazzaniga., 2002). With careful examination, research has successfully demonstrated that the two hemispheres are highly specialized regions that perform different functions; a concept called lateralization of function (in Passer, Smith, Holt, Bremner, Sutherland & Vliek 2009). For example, the left hemisphere is responsible for producing language while the right hemisphere is responsible for understanding emotional responses. It is also true that the right hemisphere governs the left side of the body and the left hemisphere governs the right side of the body with the brain showing contralateral control (in Passer et al., 2009). A common misconception shown by most is that the brain acts as a whole, rather than the brain runs at a unitary level with independent functions (in Pinel., 2009). Since the two cerebral hemispheres are known to communicate through the corpus callosum (in Pinel., 2009) researchers were particularly intrigued by the idea of ​​what happens when communication between these hemispheres is interrupted. The corpus callosum is a bridge of nervous tissues in the brain that serves as the basis of communication (in Pinel., 2009). Damage to the corpus callosum causes brain splitting, a situation in which neural connections in the brain are severed resulting in a loss of mental abilities. The consequences of these lost mental abilities can be demonstrated through a large number of split brain studies with the help of two eminent researchers...... half of the article ......and that the brain serves many different purposes rather than being a unit in its own right and that hemispheric differences exist in the brain. With or without communication through the corpus callosum, the two cerebral hemispheres are perfectly capable of functioning independently. Research aimed at understanding the biological basis of hemispheric function has reached a rather general consensus. However, individual variations must be recognized in split-brain patients as cognitive abilities vary significantly. References: Gazzaniga, M. S. (2002). The split brain revisited. Passer, M., Smith, R., Holt, N., Bremner, A., Sutherland, E., & Vliek, M. (2009). Psychology; Science of mind and behavior. (European edition). Maidenhead: McGraw-Hill. New York. Pinel, J. P. J. (2009). Biopsychology (7th ed.). Allyn and Bacon. Pearson Education Limited.