▁corre ctions ▁and ▁filling ▁in ▁g aps . ▁ ▁Motor ▁control ▁ ▁Exper iments ▁have ▁found ▁that ▁the ▁temporal ▁length ▁of ▁the ▁motor ▁control ▁loop ▁takes ▁approximately ▁ 2 5 0 - 4 0 0 ▁ms . ▁Motor ▁cent ers , ▁however , ▁are ▁already ▁making ▁corre ctions ▁to ▁their ▁previous ▁motor ▁plan ▁about ▁ 7 0 ▁ms ▁after ▁the ▁on set ▁of ▁the ▁movement ▁based ▁on ▁peri pher al ▁information ▁that ▁should ▁not ▁have ▁arrived ▁yet . ▁It ▁is ▁thus ▁likely ▁that ▁there ▁are ▁motor ▁em ul ators ▁that ▁receive ▁and ▁process ▁e f fer ent ▁copies ▁and ▁then ▁send ▁predict ive ▁peri pher al ▁output ▁before ▁the ▁actual ▁peri pher al ▁output ▁from ▁sens ors ▁is ▁received . ▁Motor ▁cent ers ▁often ▁have ▁to ▁run ▁very ▁quickly . ▁Fe ed back ▁del ays ▁and ▁peri pher al ▁errors ▁make ▁real - time , ▁rapid ▁motor ▁movement ▁very ▁difficult ▁and ▁li able ▁to ▁failure . ▁Through ▁the ▁use ▁of ▁em ul ators ▁motor ▁cent ers ▁can ▁receive ▁fast ▁and ▁reliable ▁feedback ▁in ▁the ▁form ▁of ▁a ▁pri ori ▁predictions . ▁The ▁later ▁real ▁peri ph ery ▁output ▁can ▁then ▁be ▁incorpor ated ▁into ▁a ▁more ▁accurate ▁model . ▁ ▁Motor ▁imag ery ▁ ▁It ▁is ▁possible ▁that ▁em ul ators ▁are ▁largely ▁responsible ▁for ▁motor ▁imag ery . ▁By ▁running ▁motor ▁areas ▁off line , ▁em ul ators ▁can ▁receive ▁hypoth et ical ▁movement ▁commands ▁and ▁provide ▁the ▁imag ined ▁likely ▁sens ory ▁results . ▁Much ▁of ▁this ▁may ▁be ▁run ▁without