'Fraction cells' found in human brain

[n2doc]

21 April 2009
Magazine issue 2704.

FRACTIONS may be written as the ratio of two whole numbers, but that's not how our brains process them. Instead it seems we respond to fractions directly, without processing whole numbers along the way. This suggests that kids, who often dread fractions, could be taught them more intuitively.

Previous tests have shown that specifc groups of neurons respond to different whole numbers, with the number one altering the firing patterns of different neurons than the number three. Now Simon Jacob and Andreas Nieder of the University of Tübingen in Germany have shown that we have fraction-specific neurons too.

The pair scanned the brains of adults as they were shown a variety of different fractions - either as numerical ratios or in words. In both cases, specific groups of neurons altered their firing patterns. Crucially, control experiments showed that the volunteers weren't responding first to whole numbers, and then calculating the ratio, but were reacting to the fraction itself (The Journal of Neuroscience, DOI: 10.1523/jneurosci.0651-09.2009).

more:

http://www.newscientist.com/article/mg20227045.100-fraction-cells-found-in-human-brain.html

[eppur_se_muova]

1. Hmmm ... are rationals and irrationals dealt with by the same cells?

Does the brain really regard 3 1/7 in the same way as 3.141592653589793... (which is transcendent as well as irrational)? It wouldn't surprise me at all if this was the true among non-mathematicians. Even mathematicians' brains probably respond very differently to "pi" than to the decimal representation of pi.

[Ready4Change]

3. Imaginary numbers? Infinity?

I think I'm genetically lacking in calculus brain cells. :(

[mainegreen]

2. I loved fractions as a kid.

:D