However, such estimates should take account of function
rather than anatomy alone, because animals vary in
the parts of the brain that have complex analytical
functions. Although some mammals have high level
analysis functions in the cerebral cortex, a comparable
high level of analysis occurs in areas of the striatum in
birds and in a variety of brain regions in fish and
cephalopods. We may also over-emphasise visual analysis, even though other senses have a more primary
role in the lives of many mammals, fish and invertebrates. For example, the world of many mammals is
much more olfactory than visual, and that of some fish
is centred around lateral-line organs that measure
localised pressure changes or electro-receptors monitoring changes in patterns in the surrounding electrical
field. If we are evaluating extent of awareness in
animals or attempting to ensure that their welfare is
good, we should take account of the world as they
perceive it.
However, such estimates should take account of functionrather than anatomy alone, because animals vary inthe parts of the brain that have complex analyticalfunctions. Although some mammals have high levelanalysis functions in the cerebral cortex, a comparablehigh level of analysis occurs in areas of the striatum inbirds and in a variety of brain regions in fish andcephalopods. We may also over-emphasise visual analysis, even though other senses have a more primaryrole in the lives of many mammals, fish and invertebrates. For example, the world of many mammals ismuch more olfactory than visual, and that of some fishis centred around lateral-line organs that measurelocalised pressure changes or electro-receptors monitoring changes in patterns in the surrounding electricalfield. If we are evaluating extent of awareness inanimals or attempting to ensure that their welfare isgood, we should take account of the world as theyperceive it.
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