Brain Profiling

What is a Brain Profile?

Dr Kobus Neethling


Hippocrates, who examined the brain during autopsies he performed, concluded “The brain of man is double”. It was in 400 BC that he made the connection that the loss of speech was connected with damage to the left side of the brain.  In 1864 a French surgeon named Paul Broca came to the same conclusion after observing that patients with aphasia (loss of speech) had damage to the left-brain.

In the 1960’s Philip Vogel and Joseph Bogen performed their breakthrough split-brain surgery on three epileptic patients. Roger Sperry (who received a Nobel Prize for this work in 1981) with his colleagues Bogen, Vogel and Gazzaniga tested these patients and discovered that the two hemispheres control vastly different aspects of thought and action. They found the left (controlling the right side of the body) is dominant for language and speech and for analytical and logical thought, while the right (controlling the left side of the body) excels at visualising, holistic and unstructured tasks.

This breakthrough was followed by brain dominance research by Ned Herrmann, Jaquelyn Wonder, Priscilla Donovan, Beverly Moore and others.  The NBI™ was developed after extensive international research since 1980 on left/right brain functions. Kobus Neethling under the research guidance of Prof Paul Torrance of the University of Georgia first developed the NBI™ for adults before applying similar methodologies (as explained in research documents) to develop a number of other whole brain instruments. More than 200 000 adults and children from a number of countries have been profiled by means of the NBI™. The results of research on the NBI™ have been very significant and ongoing research at a number of universities and institutes remains an essential part of whole brain science.

Quadrant summary

The  following  summarises the  thinking processes associated with each of the four quadrants.


It is important to keep in mind that no person has preferences only in one hemisphere. It is therefore important to understand your thinking preferences (in the dominant as well as in the non-dominant hemisphere)

It will greatly assist you to gain insights into the WHAT, HOW, WHO and WHY of your behavior.