Robert Fettgather has taught at San Jose State University, National University and Mission College in Santa Clara. In addition, Robert Fettgather has addressed State and National Conferences on a variety of topics.
Damage to the right parietal and occipital lobes can cause a condition known as spatial neglect where the individual ignores objects in their left visual field. Phineas P. Gage (1823–1860) was an American railroad construction foreman who is remembered for survival of a terrible accident in which a large thirteen pound tamping iron was driven completely through his skull- destroying much of his brain's left frontal lobe!
As a result of the accident, he is said to have suffered a change in personality, becoming a surly, aggressive drunkard who was unable to hold down a job.
Reflection Point: Is your personality determined solely by your brain?
There are two cerebral hemispheres and the structures connecting them (the corpus callosum). The split-brain research studies of Roger Sperry, particularly in his work with epileptic patients, helped scientists to figure out that the two cerebral hemispheres are not identical. In trying to treat epilepsy, Sperry cut through the corpus callosum creating a kind of "split brain". In this experiment, the patient 'Joe' is being tested by Michael Gazzaniga who worked with Roger Sperry.
The left hemisphere is typically more active when a person is using language, math, and other analytical skills. The the right hemisphere demonstrates more activity during tasks of recognition and perception as well as the expression of emotions. Lateralization is the term for this split in the tasks of the brain.
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