Right / Left Differences
The Right side is the animal brain, specializing in what is important to animal
survival, such as:
 
- Visual images -- basic observation
- Face images -- recognizing a special individual
- Spatial sense -- remembering where the nest is
- Music -- remembering bird songs, mating calls,
etc.
- Learning actions -- how to hunt for food, or attract mates
The Left side is the human brain, with features almost unique to humans.
Very little of this specialization has been
identified in the non-human world, including
apes. Examples include:
- Sequential planning -- originally for tool use, now useful for important things needed
for human survival, such as planning committee
meetings, and writing scripts for TV soap
operas.
- Symbols -- originally useful for making hand signs to indicate a mammoth over the hill, now
useful for important modern functions such
as road signs and calculating income tax.
- Language -- originally useful to communicate using
grunts and belches to indicate a good meal of bear
steak, now useful for important functions
such as politicial speeches and Email.
 Connections
The Corpus Callosum is a bundle of fibers that connects the
left and right sides of the brain.
- When you meet a person, or learn vocabulary
in a language, the sound of the name is remembered in the Left temporal lobe, and the Visual image of the object is remembered in the Right temporal lobe.
- When you hear the name of an object or person,
your brain can can match the name with a image in your memory.
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