I read that the word 'typoglycemia' originated by someone's typing error in attempting to spell 'hypoglycemia'. It must have amused someone to then use the word for something seemingly totally unrelated.

 But it does relate to how our brain relates to words.

“Aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, it deosn't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoetnt tihng is taht the frist and lsat ltteer be at the rghit pclae. The rset can be a toatl mses and you can sitll raed it wouthit porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe” (Davis) 

The ability of typoglycemia is related to our brain because it helps us to memorize and take actions. According to Maximilian Riesenhuber, researcher from Georgetown University Medical Center (GUMC), our brain sees the word as a picture not as a group of letters. When we are reading, the brain will interpret the scrambled word as the right word just like the one that has been memorized. Thus, we often do not discover the misspelled word when we are reading.

*********(And it also makes it very difficult for me to edit the books I am trying to publish ...and therefore, besides being quite clumsy with typing, I also don't see my errors (even after proofreading several times in attempts to find the errors I've most assuredly made.)**********