The theory of the two hemispheres of the human brain

Researchers Hirschfeld and Gelman propose that because the human mind has evolved by natural selection, it implies that enhanced functionality would develop if it produced an increase in "fit" behaviour.

One way of figuring out which hemisphere a patient favours is by observing their lateral eye movements. Myelin basic proteinand the transcription factor, OLIG2 are expressed in oligodendrocytes.

Although this nerve connection would seem to be vital, it is severed in a surgical procedure for some people who have epilepsy.

The EBA does not optimally respond to objects or parts of objects but to human bodies and body parts, a hand for example. Panksepp describes the neocortex as handling "propositional information about world events derived especially from sight, sound and touch.

Particularly, magnetic resonance imaging MRI and positron emission tomography PET are important because of their high spatial resolution and ability to image subcortical brain structures.

Alexander Reeves and Dr. Modularity[ edit ] The theory of modularity suggests that there are functionally specialized regions in the brain that are domain specific for different cognitive processes.

Human brain

October Broca[ edit ] One of the first indications of brain function lateralization resulted from the research of French physician Pierre Paul Brocain Please help improve this section by adding citations to reliable sources. The hypothalamus leads on to the pituitary gland. They can also have pragmatic deficits in situations of turn taking, topic maintenance and shared knowledge.

But both types of people can be effective if permitted to work in their own way, as some employers have discovered. Many individuals have a tendency to prefer visual imagery over verbalization and vice versa.

The Right hemisphere is seen to be dominant over many actions that involve visuo-spatial relations and non-verbal actions or reasoning. Part 3 addresses the role of the corpus striata complex in generating obsessions, compulsions, and tics.

The results were similar to those in the previous tests, showing strong dominance of activity in the left hemisphere.

This increased activity on specific areas of the right hemisphere was not observed in the left hemisphere. Wernicke noted that not every deficit was in speech production; some were linguistic.

Lateralization of brain function

Cerebrum and Cerebral cortex Major gyri and sulci on the lateral surface of the cortex Lobes of the brain The cerebrum is the largest part of the human brain, and is divided into nearly symmetrical left and right hemispheres by a deep groove, the longitudinal fissure. The area controls some motor aspects of speech production and articulation of thoughts to words and as such lesions to the area result in the specific non-fluent aphasia.

For example, if we favor the right hemisphere, but our co-workers are oriented toward their left hemisphere, we are likely to judge them as boring and rigid; if we favor the left hemisphere, we probably view our right-hemisphere co-workers as unreliable and disorganized.

These same attitudes might be projected onto other people. One of their main findings was that the right hemisphere was capable of rudimentary language processing, but often has no lexical or grammatical abilities. The two halves "hemispheres" are joined by the corpus collosum.

These tests have included lateralised presentation of visual or auditory stimuli, and the anaesthetising of one or other hemisphere during various functional tasks. Furthermore, when engaging in discourse people with right hemisphere damage, their discourse is often abrupt and perfunctory or verbose and excessive.

One question that has arisen from the study of these structural differences between hemispheres is whether the asymmetries correlate to the lateralisation of function that seems to exist.

What's the Difference Between the Right Brain and Left Brain?

Other animals, it was thought, have no hemispheric specializations of any kind. Kimura pointed out that if two different pieces of aural information were presented simultaneously one to each earwhichever was processed more accurately would indicate which hemisphere was dominant in auditory processing.

We also benefit from knowing which hemisphere to use during a particular stage of a task; for example, during problem-solving, we use the left hemisphere for the information-gathering stage, but we use the right-hemisphere during brainstorming and incubation of the ideas.Currently, there are two major theories of the brain's cognitive function.

The Two Cerebral Hemispheres of the Brain are Identical Essay

The first is the theory of modularity. Stemming from phrenology, this theory supports functional specialization, suggesting the brain has different modules that are. Dec 02,  · The Truth About The Left Brain / Right Brain Relationship: The idea that the two hemispheres perceive things differently, attach different significance to things, obtain different meanings.

The two hemispheres communicate with one another through the corpus callosum. The corpus callosum is a wide, flat bundle of neural fibers beneath the cortex that connects the left and right cerebral hemispheres and facilitates interhemispheric communication.

Recent discoveries have showed that the human brain is divided into two distinctive hemispheres with distinctive functions. Most commonly in the human brain, the left hemisphere controls logical thinking, while the right hemisphere controls creativity.

a condition in which the two hemispheres of the brain are isolated by cutting the connecting fibers (mainly those of the corpus callosum) between them Explain why psychologists are concerned with human biology, and describe the ill-fated phrenology theory.

The human brain comprises two hemispheres separated by a bundle of nerves.

Left Brain vs. Right Brain: What Does This Mean for Me?

The left brain controls movement for the right side of the body, while the right brain .

The theory of the two hemispheres of the human brain
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