for his linguistics research…

…during speech, people know the grammatical data about a noun approximately 40 milliseconds earlier than the first syllable of the word. Another 120 milliseconds have elapsed before they have formed the complete sound of the word so that they can speak it.

http://www.nwo.nl/nwohome.nsf/Pages/NWOP_6CYKJN/$file/2005JuryrapportHagoortUK.htm