How Split-brain Patients Demonstrate The Organization Of The Brain

What is split brain? Having the corpus callosum severed or absent, so as to eliminate the main connection between the two hemispheres of the brain. [Dictionary.com]

What causes split brain? Causes of split-brain syndrome. The primary cause of split-brain syndrome is intentional severing of the corpus callosum, partially or completely, through a surgical procedure known as corpus callosotomy [https://www.britannica.com/science/split-brain-syndrome]

Why is split brain surgery needed? Split-brain surgery, or corpus calloscotomy, is a drastic way of alleviating epileptic seizures, the occurrence of sporadic electrical storms in the brain. The procedure involves severing the corpus callosum, the main bond between the brain's left and right hemispheres. [https://www.psychologytoday.com/us/blog/the-superhuman-mind/201211/split-brains]

Medical

a drastic way of alleviating epileptic seizures

An explanation of how split-brain patients demonstrate the organization of the brain. 

Split brain individuals experience a surgical severe in the corpus callosum. This method prevents seizures while also halting the communication between both the right and left hemisphere. 

The organizational factors of the brain in patients who have experienced split brain is the interpretation of the communication given through language (Breedlove, S.M. 2017).

According to Breedlove (2017), right visual cortex stimulates the corpus callosum fibers. The information then transmits it to the left hemisphere. The information is then processed and brings about language. Likewise, when visual stimuli from the left field, it is then given to the right hemisphere. When the split takes place, the communication is then disconnected from a transmission. 

While hundreds of axons are severed without changing one’s behavior, it is still noted that the separation in communication bring an understanding of the one hemisphere is not able to travel for faster or initial clarity. Split brain individuals can read and verbally share words they’ve sent to the left hemisphere. However, the understanding of the objects shapes and drawings can provide clues as to what is been seen (Breedlove, S.M. 2017). 

Research

the systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions.


Similarities and Differences 

Similarities

  1. Visual information can be confusing (Macqueen, 2011).

  2. Disconnection syndromes (Uddin, 2011)

  3. Self-representation evaluation and self-related processes (Uddin, 2011)

  4. Two hemispheres exist with different brain communication processes (Uddin, 2011).

  5. Information can still be processed through both hemispheres (Uddin, 2011).

Differences

  1. Different identities are formed (Macqueen, 2011).

  2. Sharing a brain with another human being (Uddin, 2011).

  3. Two hemispheres exist and surgically severed (Uddin, 2011).

Personhood

Personhood in split-brain individuals explores self-representation and self-relating processes. They each have their own personalities, visual stimuli, and cues. Their processes are defined by the ability to explore self-recognition, ownership, and agency. Information can still be transferred through subcortical pathways only when the cortical commissures are no available.  (Uddin, 2011). 

The self can be explained through the following (Uddin, 2011):

Self Cognitive Phenomenon 

  • Psychology of the self - “Examined through face recognition.”

  • Physical aspects of the self - “Operationalized with studies examining autobiographical memory and self-knowledge.”

I hope you all enjoyed learning something new or reviewing my research and findings on split brain. There is so much more to this phenomenon. What is stated here are facts you can add to your knowledge base.

With Gratitude,

Elsie

Resources

Breedlove, S.M. and Watson, N. V. (2017). Behavioral Neuroscience, 8th edition. Sunderland, MA: Sinnauer Associates, Inc.

Macqueen, K. (2011). Tatiana and Krista go to school: the twins, who tests confirm can see through each other's eyes, are making new friends in kindergarten. Rogers Publishing Ltd. Vol. 124 Issue 39, p26. Retrieved from https://ezp.waldenulibrary.org/login?url=https://search.ebscohost.com/login.aspx?direct=true&db=edsgea&AN=edsgcl.269432366&site=eds-live&scope=site

Uddin, L.Q. (2011). Brain connectivity and the self: The case of cerebral disconnection. Consciousness & Cognition. Vol. 20 Issue 1, p94-98. Retrieved from 10.1016/j.concog.2010.09.009