
Researchers led by Dr Paul Thompson, from the University of California at Los Angeles, compared 20 twin pairs, half of whom were identical and half non-identical.
Identical twins have the same genes, whereas non-identical twins, like ordinary
siblings, share about half.
Features that are the same in identical, but not in non-identical, twins are
therefore likely to be governed by genetic factors.
New 3D-imaging techniques enabled the scientists to look for subtle similarities and differences in brain structure.
Recent studies have suggested that" many cognitive skills are surprisingly heritable.
The latest findings from California were reported on Sunday in the journal of Nature Neuro-science.
"There are thought to be strong genetic influences on lQ, verbal and
spatial abilities, perceptual speed, and even some personality traits including
emotional reactions to stress".
In a separate report, coffee has been found to possess a whole range of benefits
for the human brain, contrary to popular belief.
The main benefits were that coffee could boost creativity, intelligence and
stamina. It also made weight reduction easier and sharpened the senses, the
German Men's Health magazine reported, citing a survey by Dusseldorf University.
Intelligence in the genes and in coffee beans, studies find.
Evidence that human intelligence is largely determined before
birth emerged this week from a new genetic study of twins. Coffee can help!
The findings showed that genetic factors accounted for differences between individuals in key areas such as intelligence and language ability.
Grey matter volume - a measure of the density of brain cells was strongly determined by genes, and reflected cognitive performance.
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