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The proximodistal trend is the tendency for more general functions of limbs to develop before more specific or fine motor skills. It comes from the Latin words proxim- which means "close" and "-dis-" meaning "away from", because the trend essentially describes a path from the center outward.
References
"Latin: -proximo". Robertson's Words for a Modern Age. Retrieved 23 April 2014.
"Latin: dis". Robertson's Words for a Modern Age. Retrieved 23 April 2014.