Increased mixed- and left-handedness
are expected in children with specific disorders of speech and literacy, when the latter are associated with absence of typical cerebral dominance (Orton, 1937).
A study by Chris McManus, a scientist at University College London, reveals that left-handedness
seems to have reached record levels.
It has been suggested that lefties are better at judging distances No-one really knows what causes left-handedness
,although there is a connection to greater use of the right,more artistic side of the brain.
Specifically, they posit a second relevant gene, an X-linked recessive gene, that serves to increase the rate of phenotypic left-handedness
from that which would be manifest were the autosomal gene the sole genetic influence on handedness.
It is like heterosexuality or, to take a once-stigmatized trait, left-handedness
The belief that there is a link between talent and left-handedness
has a long history.
The Left-Handers Club was formed in 1990 and provides a help and advice line, promotes research into left-handedness
and development of left-handed items.
He was beaten at Catholic school by several who were determined to correct his left-handedness
But a trend of relatively stronger right- and left-handedness
does appear in chimp groups that regularly use tools, such as nut-cracking stones or sticks for poking into termite mounds to remove the edible insects.
Wells says that hormone levels may help explain sex differences in paw choice, for studies conducted in the past have linked prenatal testosterone exposure to left-handedness
has been regarded as sinister and different.
com to determine how much right or left-handedness
impacts on people's lives and career.