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The Human Brain
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For human beings, primitive (reptilian) instinctive urges and behaviour are overlaid
by mammalian care and affection for one`s young and human care and affection for
one`s family and community. Behaviour is aimed at survival of the young and of the
family, and then is for the good of family, other people, community.
The right hemisphere is linked to the primitive older part of the brain which
has no verbal, semantic or reasoning ability and so functions subconsciously (below
the level of consciousness). Hence the right hemisphere communicates with the `subconscious`
functions of the older part of the brain by using images. Communicating by using
images is fast.
And so the right hemisphere communicates using images (pictures) and has highly
developed spatial abilities, is intuitive and imaginative, is concerned with emotions
and feelings.
Speech, that is thinking and communicating by using words, seems to have evolved
later. The left hemisphere communicates by using words, has highly developed verbal
and semantic abilities, is logical and systematic, concerned with matters as they
are. Images may be described, or transformed into a narrative, by the left hemisphere.
Hence behaviour is not only determined by feelings but also by knowledge, understanding
and reason.
So the human brain includes the processing and memorising of images and of their
components, and the development of language and corresponding mental processing
connected with memory and memorising. It also includes a wide range of emotions,
of feelings, of care and affection, and the capability for objective and logical
thinking and evaluation. And the later development of written languages and artificial
images.